fullscreen Use Tree Navigation

Added in API level 1

public class

WebView

extends AbsoluteLayout
implements ViewTreeObserver.OnGlobalFocusChangeListener ViewGroup.OnHierarchyChangeListener

java.lang.Object
↳	android.view.View
	↳	android.view.ViewGroup
		↳	android.widget.AbsoluteLayout
			↳	android.webkit.WebView

Class Overview

A View that displays web pages. This class is the basis upon which you can roll your own web browser or simply display some online content within your Activity. It uses the WebKit rendering engine to display web pages and includes methods to navigate forward and backward through a history, zoom in and out, perform text searches and more.

Note that, in order for your Activity to access the Internet and load web pages in a WebView, you must add the INTERNET permissions to your Android Manifest file:

<uses-permission android:name="android.permission.INTERNET" />

This must be a child of the element.

For more information, read Building Web Apps in WebView.

Basic usage

By default, a WebView provides no browser-like widgets, does not enable JavaScript and web page errors are ignored. If your goal is only to display some HTML as a part of your UI, this is probably fine; the user won't need to interact with the web page beyond reading it, and the web page won't need to interact with the user. If you actually want a full-blown web browser, then you probably want to invoke the Browser application with a URL Intent rather than show it with a WebView. For example:

 Uri uri = Uri.parse("http://www.example.com");
 Intent intent = new Intent(Intent.ACTION_VIEW, uri);
 startActivity(intent);

See Intent for more information.

To provide a WebView in your own Activity, include a <WebView> in your layout, or set the entire Activity window as a WebView during onCreate():

 WebView webview = new WebView(this);
 setContentView(webview);

Then load the desired web page:

 // Simplest usage: note that an exception will NOT be thrown
 // if there is an error loading this page (see below).
 webview.loadUrl("http://slashdot.org/");

 // OR, you can also load from an HTML string:
 String summary = "<html><body>You scored <b>192</b> points.</body></html>";
 webview.loadData(summary, "text/html", null);
 // ... although note that there are restrictions on what this HTML can do.
 // See the JavaDocs for loadData() and loadDataWithBaseURL() for more info.

A WebView has several customization points where you can add your own behavior. These are:

Creating and setting a WebChromeClient subclass. This class is called when something that might impact a browser UI happens, for instance, progress updates and JavaScript alerts are sent here (see Debugging Tasks).
Creating and setting a WebViewClient subclass. It will be called when things happen that impact the rendering of the content, eg, errors or form submissions. You can also intercept URL loading here (via shouldOverrideUrlLoading()).
Modifying the WebSettings, such as enabling JavaScript with setJavaScriptEnabled().
Injecting Java objects into the WebView using the addJavascriptInterface(Object, String) method. This method allows you to inject Java objects into a page's JavaScript context, so that they can be accessed by JavaScript in the page.

Here's a more complicated example, showing error handling, settings, and progress notification:

 // Let's display the progress in the activity title bar, like the
 // browser app does.
 getWindow().requestFeature(Window.FEATURE_PROGRESS);

 webview.getSettings().setJavaScriptEnabled(true);

 final Activity activity = this;
 webview.setWebChromeClient(new WebChromeClient() {
   public void onProgressChanged(WebView view, int progress) {
     // Activities and WebViews measure progress with different scales.
     // The progress meter will automatically disappear when we reach 100%
     activity.setProgress(progress * 1000);
   }
 });
 webview.setWebViewClient(new WebViewClient() {
   public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
     Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
   }
 });

 webview.loadUrl("http://developer.android.com/");

Zoom

To enable the built-in zoom, set WebSettings.setBuiltInZoomControls(boolean) (introduced in API level CUPCAKE).

NOTE: Using zoom if either the height or width is set to WRAP_CONTENT may lead to undefined behavior and should be avoided.

Cookie and window management

For obvious security reasons, your application has its own cache, cookie store etc.—it does not share the Browser application's data.

By default, requests by the HTML to open new windows are ignored. This is true whether they be opened by JavaScript or by the target attribute on a link. You can customize your WebChromeClient to provide your own behaviour for opening multiple windows, and render them in whatever manner you want.

The standard behavior for an Activity is to be destroyed and recreated when the device orientation or any other configuration changes. This will cause the WebView to reload the current page. If you don't want that, you can set your Activity to handle the orientation and keyboardHidden changes, and then just leave the WebView alone. It'll automatically re-orient itself as appropriate. Read Handling Runtime Changes for more information about how to handle configuration changes during runtime.

Building web pages to support different screen densities

The screen density of a device is based on the screen resolution. A screen with low density has fewer available pixels per inch, where a screen with high density has more — sometimes significantly more — pixels per inch. The density of a screen is important because, other things being equal, a UI element (such as a button) whose height and width are defined in terms of screen pixels will appear larger on the lower density screen and smaller on the higher density screen. For simplicity, Android collapses all actual screen densities into three generalized densities: high, medium, and low.

By default, WebView scales a web page so that it is drawn at a size that matches the default appearance on a medium density screen. So, it applies 1.5x scaling on a high density screen (because its pixels are smaller) and 0.75x scaling on a low density screen (because its pixels are bigger). Starting with API level ECLAIR, WebView supports DOM, CSS, and meta tag features to help you (as a web developer) target screens with different screen densities.

Here's a summary of the features you can use to handle different screen densities:

The window.devicePixelRatio DOM property. The value of this property specifies the default scaling factor used for the current device. For example, if the value of window.devicePixelRatio is "1.0", then the device is considered a medium density (mdpi) device and default scaling is not applied to the web page; if the value is "1.5", then the device is considered a high density device (hdpi) and the page content is scaled 1.5x; if the value is "0.75", then the device is considered a low density device (ldpi) and the content is scaled 0.75x.
The -webkit-device-pixel-ratio CSS media query. Use this to specify the screen densities for which this style sheet is to be used. The corresponding value should be either "0.75", "1", or "1.5", to indicate that the styles are for devices with low density, medium density, or high density screens, respectively. For example:
```
 <link rel="stylesheet" media="screen and (-webkit-device-pixel-ratio:1.5)" href="hdpi.css" />
```
The hdpi.css stylesheet is only used for devices with a screen pixel ration of 1.5, which is the high density pixel ratio.

HTML5 Video support

In order to support inline HTML5 video in your application you need to have hardware acceleration turned on.

Full screen support

In order to support full screen — for video or other HTML content — you need to set a WebChromeClient and implement both onShowCustomView(View, WebChromeClient.CustomViewCallback) and onHideCustomView(). If the implementation of either of these two methods is missing then the web contents will not be allowed to enter full screen. Optionally you can implement getVideoLoadingProgressView() to customize the View displayed whilst a video is loading.

Layout size

It is recommended to set the WebView layout height to a fixed value or to MATCH_PARENT instead of using WRAP_CONTENT. When using MATCH_PARENT for the height none of the WebView's parents should use a WRAP_CONTENT layout height since that could result in incorrect sizing of the views.

Setting the WebView's height to WRAP_CONTENT enables the following behaviors:

The HTML body layout height is set to a fixed value. This means that elements with a height relative to the HTML body may not be sized correctly.
For applications targetting KITKAT and earlier SDKs the HTML viewport meta tag will be ignored in order to preserve backwards compatibility.

Using a layout width of WRAP_CONTENT is not supported. If such a width is used the WebView will attempt to use the width of the parent instead.

Summary

Nested Classes
interface	WebView.FindListener	Interface to listen for find results.
class	WebView.HitTestResult
interface	WebView.PictureListener	This interface was deprecated in API level 12. This interface is now obsolete.
class	WebView.VisualStateCallback	Callback interface supplied to `postVisualStateCallback(long, WebView.VisualStateCallback)` for receiving notifications about the visual state.
class	WebView.WebViewTransport	Transportation object for returning WebView across thread boundaries.

[Expand]

Inherited XML Attributes

From class android.view.ViewGroup

From class android.view.View

Constants
String	SCHEME_GEO	URI scheme for map address.
String	SCHEME_MAILTO	URI scheme for email address.
String	SCHEME_TEL	URI scheme for telephone number.

[Expand]

Inherited Constants

From class android.view.ViewGroup

From class android.view.View

[Expand]

Inherited Fields

From class android.view.View

Public Constructors
	WebView(Context context) Constructs a new WebView with a Context object.
	WebView(Context context, AttributeSet attrs) Constructs a new WebView with layout parameters.
	WebView(Context context, AttributeSet attrs, int defStyleAttr) Constructs a new WebView with layout parameters and a default style.
	WebView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) Constructs a new WebView with layout parameters and a default style.
	WebView(Context context, AttributeSet attrs, int defStyleAttr, boolean privateBrowsing) This constructor was deprecated in API level 17. Private browsing is no longer supported directly via WebView and will be removed in a future release. Prefer using `WebSettings`, `WebViewDatabase`, `CookieManager` and `WebStorage` for fine-grained control of privacy data.

Public Methods
void	addJavascriptInterface(Object object, String name) Injects the supplied Java object into this WebView.
boolean	canGoBack() Gets whether this WebView has a back history item.
boolean	canGoBackOrForward(int steps) Gets whether the page can go back or forward the given number of steps.
boolean	canGoForward() Gets whether this WebView has a forward history item.
boolean	canZoomIn() This method was deprecated in API level 17. This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer `onScaleChanged(WebView, float, float)`.
boolean	canZoomOut() This method was deprecated in API level 17. This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer `onScaleChanged(WebView, float, float)`.
Picture	capturePicture() This method was deprecated in API level 19. Use `onDraw(Canvas)` to obtain a bitmap snapshot of the WebView, or `saveWebArchive(String)` to save the content to a file.
void	clearCache(boolean includeDiskFiles) Clears the resource cache.
static void	clearClientCertPreferences(Runnable onCleared) Clears the client certificate preferences stored in response to proceeding/cancelling client cert requests.
void	clearFormData() Removes the autocomplete popup from the currently focused form field, if present.
void	clearHistory() Tells this WebView to clear its internal back/forward list.
void	clearMatches() Clears the highlighting surrounding text matches created by `findAllAsync(String)`.
void	clearSslPreferences() Clears the SSL preferences table stored in response to proceeding with SSL certificate errors.
void	clearView() This method was deprecated in API level 18. Use WebView.loadUrl("about:blank") to reliably reset the view state and release page resources (including any running JavaScript).
void	computeScroll() Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary.
WebBackForwardList	copyBackForwardList() Gets the WebBackForwardList for this WebView.
PrintDocumentAdapter	createPrintDocumentAdapter() This method was deprecated in API level 21. Use `createPrintDocumentAdapter(String)` which requires user to provide a print document name.
PrintDocumentAdapter	createPrintDocumentAdapter(String documentName) Creates a PrintDocumentAdapter that provides the content of this Webview for printing.
WebMessagePort[]	createWebMessageChannel() Creates a message channel to communicate with JS and returns the message ports that represent the endpoints of this message channel.
void	destroy() Destroys the internal state of this WebView.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
void	documentHasImages(Message response) Queries the document to see if it contains any image references.
static void	enableSlowWholeDocumentDraw() For apps targeting the L release, WebView has a new default behavior that reduces memory footprint and increases performance by intelligently choosing the portion of the HTML document that needs to be drawn.
void	evaluateJavascript(String script, ValueCallback<String> resultCallback) Asynchronously evaluates JavaScript in the context of the currently displayed page.
static String	findAddress(String addr) Gets the first substring consisting of the address of a physical location.
int	findAll(String find) This method was deprecated in API level 16. `findAllAsync(String)` is preferred.
void	findAllAsync(String find) Finds all instances of find on the page and highlights them, asynchronously.
void	findNext(boolean forward) Highlights and scrolls to the next match found by `findAllAsync(String)`, wrapping around page boundaries as necessary.
void	flingScroll(int vx, int vy)
void	freeMemory() This method was deprecated in API level 19. Memory caches are automatically dropped when no longer needed, and in response to system memory pressure.
CharSequence	getAccessibilityClassName() Return the class name of this object to be used for accessibility purposes.
AccessibilityNodeProvider	getAccessibilityNodeProvider() Gets the provider for managing a virtual view hierarchy rooted at this View and reported to `AccessibilityService`s that explore the window content.
SslCertificate	getCertificate() Gets the SSL certificate for the main top-level page or null if there is no certificate (the site is not secure).
int	getContentHeight() Gets the height of the HTML content.
Bitmap	getFavicon() Gets the favicon for the current page.
WebView.HitTestResult	getHitTestResult() Gets a HitTestResult based on the current cursor node.
String[]	getHttpAuthUsernamePassword(String host, String realm) Retrieves HTTP authentication credentials for a given host and realm.
String	getOriginalUrl() Gets the original URL for the current page.
int	getProgress() Gets the progress for the current page.
float	getScale() This method was deprecated in API level 17. This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer `onScaleChanged(WebView, float, float)`.
WebSettings	getSettings() Gets the WebSettings object used to control the settings for this WebView.
String	getTitle() Gets the title for the current page.
String	getUrl() Gets the URL for the current page.
void	goBack() Goes back in the history of this WebView.
void	goBackOrForward(int steps) Goes to the history item that is the number of steps away from the current item.
void	goForward() Goes forward in the history of this WebView.
void	invokeZoomPicker() Invokes the graphical zoom picker widget for this WebView.
boolean	isPrivateBrowsingEnabled() Gets whether private browsing is enabled in this WebView.
void	loadData(String data, String mimeType, String encoding) Loads the given data into this WebView using a 'data' scheme URL.
void	loadDataWithBaseURL(String baseUrl, String data, String mimeType, String encoding, String historyUrl) Loads the given data into this WebView, using baseUrl as the base URL for the content.
void	loadUrl(String url) Loads the given URL.
void	loadUrl(String url, Map<String, String> additionalHttpHeaders) Loads the given URL with the specified additional HTTP headers.
void	onChildViewAdded(View parent, View child) This method was deprecated in API level 8. WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.
void	onChildViewRemoved(View p, View child) This method was deprecated in API level 8. WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.
InputConnection	onCreateInputConnection(EditorInfo outAttrs) Create a new InputConnection for an InputMethod to interact with the view.
void	onFinishTemporaryDetach() Called after `onStartTemporaryDetach()` when the container is done changing the view.
boolean	onGenericMotionEvent(MotionEvent event) Implement this method to handle generic motion events.
void	onGlobalFocusChanged(View oldFocus, View newFocus) This method was deprecated in API level 3. WebView should not have implemented ViewTreeObserver.OnGlobalFocusChangeListener. This method does nothing now.
boolean	onHoverEvent(MotionEvent event) Implement this method to handle hover events.
boolean	onKeyDown(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyDown()`: perform press of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released, if the view is enabled and clickable.
boolean	onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: always returns false (doesn't handle the event).
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyUp()`: perform clicking of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released.
void	onPause() Pauses any extra processing associated with this WebView and its associated DOM, plugins, JavaScript etc.
void	onProvideVirtualStructure(ViewStructure structure) Called when assist structure is being retrieved from a view as part of `Activity.onProvideAssistData` to generate additional virtual structure under this view.
void	onResume() Resumes a WebView after a previous call to onPause().
void	onStartTemporaryDetach() This is called when a container is going to temporarily detach a child, with `ViewGroup.detachViewFromParent`.
boolean	onTouchEvent(MotionEvent event) Implement this method to handle touch screen motion events.
boolean	onTrackballEvent(MotionEvent event) Implement this method to handle trackball motion events.
void	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
boolean	overlayHorizontalScrollbar() This method was deprecated in API level 23. This method is now obsolete.
boolean	overlayVerticalScrollbar() This method was deprecated in API level 23. This method is now obsolete.
boolean	pageDown(boolean bottom) Scrolls the contents of this WebView down by half the page size.
boolean	pageUp(boolean top) Scrolls the contents of this WebView up by half the view size.
void	pauseTimers() Pauses all layout, parsing, and JavaScript timers for all WebViews.
boolean	performLongClick() Call this view's OnLongClickListener, if it is defined.
void	postUrl(String url, byte[] postData) Loads the URL with postData using "POST" method into this WebView.
void	postVisualStateCallback(long requestId, WebView.VisualStateCallback callback) Posts a `WebView.VisualStateCallback`, which will be called when the current state of the WebView is ready to be drawn.
void	postWebMessage(WebMessage message, Uri targetOrigin) Post a message to main frame.
void	reload() Reloads the current URL.
void	removeJavascriptInterface(String name) Removes a previously injected Java object from this WebView.
boolean	requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. Looks for a view to give focus to respecting the setting specified by `getDescendantFocusability()`.
void	requestFocusNodeHref(Message hrefMsg) Requests the anchor or image element URL at the last tapped point.
void	requestImageRef(Message msg) Requests the URL of the image last touched by the user.
WebBackForwardList	restoreState(Bundle inState) Restores the state of this WebView from the given Bundle.
void	resumeTimers() Resumes all layout, parsing, and JavaScript timers for all WebViews.
void	savePassword(String host, String username, String password) This method was deprecated in API level 18. Saving passwords in WebView will not be supported in future versions.
WebBackForwardList	saveState(Bundle outState) Saves the state of this WebView used in `onSaveInstanceState(Bundle)`.
void	saveWebArchive(String filename) Saves the current view as a web archive.
void	saveWebArchive(String basename, boolean autoname, ValueCallback<String> callback) Saves the current view as a web archive.
void	setBackgroundColor(int color) Sets the background color for this view.
void	setCertificate(SslCertificate certificate) This method was deprecated in API level 17. Calling this function has no useful effect, and will be ignored in future releases.
void	setDownloadListener(DownloadListener listener) Registers the interface to be used when content can not be handled by the rendering engine, and should be downloaded instead.
void	setFindListener(WebView.FindListener listener) Registers the listener to be notified as find-on-page operations progress.
void	setHorizontalScrollbarOverlay(boolean overlay) This method was deprecated in API level 23. This method has no effect.
void	setHttpAuthUsernamePassword(String host, String realm, String username, String password) Stores HTTP authentication credentials for a given host and realm.
void	setInitialScale(int scaleInPercent) Sets the initial scale for this WebView.
void	setLayerType(int layerType, Paint paint) Specifies the type of layer backing this view.
void	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
void	setMapTrackballToArrowKeys(boolean setMap) This method was deprecated in API level 17. Only the default case, true, will be supported in a future version.
void	setNetworkAvailable(boolean networkUp) Informs WebView of the network state.
void	setOverScrollMode(int mode) Set the over-scroll mode for this view.
void	setPictureListener(WebView.PictureListener listener) This method was deprecated in API level 12. This method is now obsolete.
void	setScrollBarStyle(int style) Specify the style of the scrollbars.
void	setVerticalScrollbarOverlay(boolean overlay) This method was deprecated in API level 23. This method has no effect.
void	setWebChromeClient(WebChromeClient client) Sets the chrome handler.
static void	setWebContentsDebuggingEnabled(boolean enabled) Enables debugging of web contents (HTML / CSS / JavaScript) loaded into any WebViews of this application.
void	setWebViewClient(WebViewClient client) Sets the WebViewClient that will receive various notifications and requests.
boolean	shouldDelayChildPressedState() Return true if the pressed state should be delayed for children or descendants of this ViewGroup.
boolean	showFindDialog(String text, boolean showIme) This method was deprecated in API level 18. This method does not work reliably on all Android versions; implementing a custom find dialog using WebView.findAllAsync() provides a more robust solution.
void	stopLoading() Stops the current load.
void	zoomBy(float zoomFactor) Performs a zoom operation in this WebView.
boolean	zoomIn() Performs zoom in in this WebView.
boolean	zoomOut() Performs zoom out in this WebView.

Protected Methods
int	computeHorizontalScrollOffset() Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollRange() Compute the horizontal range that the horizontal scrollbar represents.
int	computeVerticalScrollExtent() Compute the vertical extent of the vertical scrollbar's thumb within the vertical range.
int	computeVerticalScrollOffset() Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range.
int	computeVerticalScrollRange() Compute the vertical range that the vertical scrollbar represents.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	onAttachedToWindow() This is called when the view is attached to a window.
void	onConfigurationChanged(Configuration newConfig) Called when the current configuration of the resources being used by the application have changed.
void	onDraw(Canvas canvas) Implement this to do your drawing.
void	onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) Called by the view system when the focus state of this view changes.
void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
void	onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) Called by `overScrollBy(int, int, int, int, int, int, int, int, boolean)` to respond to the results of an over-scroll operation.
void	onScrollChanged(int l, int t, int oldl, int oldt) This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents).
void	onSizeChanged(int w, int h, int ow, int oh) This is called during layout when the size of this view has changed.
void	onVisibilityChanged(View changedView, int visibility) Called when the visibility of the view or an ancestor of the view has changed.
void	onWindowVisibilityChanged(int visibility) Called when the window containing has change its visibility (between `GONE`, `INVISIBLE`, and `VISIBLE`).

[Expand]

Inherited Methods

From class android.widget.AbsoluteLayout

From class android.view.ViewGroup

void	addChildrenForAccessibility(ArrayList<View> outChildren) Adds the children of this View relevant for accessibility to the given list as output.
void	addFocusables(ArrayList<View> views, int direction, int focusableMode) Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
boolean	addStatesFromChildren() Returns whether this ViewGroup's drawable states also include its children's drawable states.
void	addTouchables(ArrayList<View> views) Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
void	addView(View child, int index, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, ViewGroup.LayoutParams params) Adds a child view with the specified layout parameters.
void	addView(View child, int index) Adds a child view.
void	addView(View child) Adds a child view.
void	addView(View child, int width, int height) Adds a child view with this ViewGroup's default layout parameters and the specified width and height.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params, boolean preventRequestLayout) Adds a view during layout.
boolean	addViewInLayout(View child, int index, ViewGroup.LayoutParams params) Adds a view during layout.
void	attachLayoutAnimationParameters(View child, ViewGroup.LayoutParams params, int index, int count) Subclasses should override this method to set layout animation parameters on the supplied child.
void	attachViewToParent(View child, int index, ViewGroup.LayoutParams params) Attaches a view to this view group.
void	bringChildToFront(View child) Change the z order of the child so it's on top of all other children.
boolean	canAnimate() Indicates whether the view group has the ability to animate its children after the first layout.
boolean	checkLayoutParams(ViewGroup.LayoutParams p)
void	childDrawableStateChanged(View child) If `addStatesFromChildren()` is true, refreshes this group's drawable state (to include the states from its children).
void	childHasTransientStateChanged(View child, boolean childHasTransientState) Called when a child view has changed whether or not it is tracking transient state.
void	cleanupLayoutState(View child) Prevents the specified child to be laid out during the next layout pass.
void	clearChildFocus(View child) Called when a child of this parent is giving up focus
void	clearDisappearingChildren() Removes any pending animations for views that have been removed.
void	clearFocus() Called when this view wants to give up focus.
void	debug(int depth) Prints information about this view in the log output, with the tag `VIEW_LOG_TAG`.
void	detachAllViewsFromParent() Detaches all views from the parent.
void	detachViewFromParent(View child) Detaches a view from its parent.
void	detachViewFromParent(int index) Detaches a view from its parent.
void	detachViewsFromParent(int start, int count) Detaches a range of views from their parents.
WindowInsets	dispatchApplyWindowInsets(WindowInsets insets) Request to apply the given window insets to this view or another view in its subtree.
void	dispatchConfigurationChanged(Configuration newConfig) Dispatch a notification about a resource configuration change down the view hierarchy.
void	dispatchDisplayHint(int hint) Dispatch a hint about whether this view is displayed.
boolean	dispatchDragEvent(DragEvent event) Detects if this View is enabled and has a drag event listener.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	dispatchDrawableHotspotChanged(float x, float y) Dispatches drawable hotspot changes to child views that meet at least one of the following criteria: Returns `false` from both `isClickable()` and `isLongClickable()` Requests duplication of parent state via `setDuplicateParentStateEnabled(boolean)`
void	dispatchFreezeSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `saveHierarchyState(android.util.SparseArray)` freeze()} to only this view, not to its children.
boolean	dispatchGenericFocusedEvent(MotionEvent event) Dispatch a generic motion event to the currently focused view.
boolean	dispatchGenericPointerEvent(MotionEvent event) Dispatch a generic motion event to the view under the first pointer.
boolean	dispatchHoverEvent(MotionEvent event) Dispatch a hover event.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchKeyEventPreIme(KeyEvent event) Dispatch a key event before it is processed by any input method associated with the view hierarchy.
boolean	dispatchKeyShortcutEvent(KeyEvent event) Dispatches a key shortcut event.
void	dispatchProvideStructure(ViewStructure structure) Dispatch creation of `ViewStructure` down the hierarchy.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(android.util.SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(android.util.SparseArray)` to store the state for this view and its children.
void	dispatchSetActivated(boolean activated) Dispatch setActivated to all of this View's children.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
void	dispatchSetSelected(boolean selected) Dispatch setSelected to all of this View's children.
void	dispatchSystemUiVisibilityChanged(int visible) Dispatch callbacks to `setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener)` down the view hierarchy.
void	dispatchThawSelfOnly(SparseArray<Parcelable> container) Perform dispatching of a `restoreHierarchyState(android.util.SparseArray)` to only this view, not to its children.
boolean	dispatchTouchEvent(MotionEvent ev) Pass the touch screen motion event down to the target view, or this view if it is the target.
boolean	dispatchTrackballEvent(MotionEvent event) Pass a trackball motion event down to the focused view.
boolean	dispatchUnhandledMove(View focused, int direction) This method is the last chance for the focused view and its ancestors to respond to an arrow key.
void	dispatchVisibilityChanged(View changedView, int visibility) Dispatch a view visibility change down the view hierarchy.
void	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
void	dispatchWindowSystemUiVisiblityChanged(int visible) Dispatch callbacks to `onWindowSystemUiVisibilityChanged(int)` down the view hierarchy.
void	dispatchWindowVisibilityChanged(int visibility) Dispatch a window visibility change down the view hierarchy.
boolean	drawChild(Canvas canvas, View child, long drawingTime) Draw one child of this View Group.
void	drawableStateChanged() This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
void	endViewTransition(View view) This method should always be called following an earlier call to `startViewTransition(View)`.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
void	findViewsWithText(ArrayList<View> outViews, CharSequence text, int flags) Finds the Views that contain given text.
View	focusSearch(View focused, int direction) Find the nearest view in the specified direction that wants to take focus.
void	focusableViewAvailable(View v) Tells the parent that a new focusable view has become available.
boolean	gatherTransparentRegion(Region region) This is used by the RootView to perform an optimization when the view hierarchy contains one or several SurfaceView.
ViewGroup.LayoutParams	generateDefaultLayoutParams() Returns a set of default layout parameters.
ViewGroup.LayoutParams	generateLayoutParams(AttributeSet attrs) Returns a new set of layout parameters based on the supplied attributes set.
ViewGroup.LayoutParams	generateLayoutParams(ViewGroup.LayoutParams p) Returns a safe set of layout parameters based on the supplied layout params.
CharSequence	getAccessibilityClassName() Return the class name of this object to be used for accessibility purposes.
View	getChildAt(int index) Returns the view at the specified position in the group.
int	getChildCount() Returns the number of children in the group.
int	getChildDrawingOrder(int childCount, int i) Returns the index of the child to draw for this iteration.
static int	getChildMeasureSpec(int spec, int padding, int childDimension) Does the hard part of measureChildren: figuring out the MeasureSpec to pass to a particular child.
boolean	getChildStaticTransformation(View child, Transformation t) Sets `t` to be the static transformation of the child, if set, returning a boolean to indicate whether a static transform was set.
boolean	getChildVisibleRect(View child, Rect r, Point offset) Compute the visible part of a rectangular region defined in terms of a child view's coordinates.
boolean	getClipChildren() Returns whether this group's children are clipped to their bounds before drawing.
boolean	getClipToPadding() Returns whether this ViewGroup will clip its children to its padding, and resize (but not clip) any EdgeEffect to the padded region, if padding is present.
int	getDescendantFocusability() Gets the descendant focusability of this view group.
View	getFocusedChild() Returns the focused child of this view, if any.
LayoutAnimationController	getLayoutAnimation() Returns the layout animation controller used to animate the group's children.
Animation.AnimationListener	getLayoutAnimationListener() Returns the animation listener to which layout animation events are sent.
int	getLayoutMode() Returns the basis of alignment during layout operations on this ViewGroup: either `LAYOUT_MODE_CLIP_BOUNDS` or `LAYOUT_MODE_OPTICAL_BOUNDS`.
LayoutTransition	getLayoutTransition() Gets the LayoutTransition object for this ViewGroup.
int	getNestedScrollAxes() Return the current axes of nested scrolling for this ViewGroup.
ViewGroupOverlay	getOverlay() Returns the ViewGroupOverlay for this view group, creating it if it does not yet exist.
int	getPersistentDrawingCache() Returns an integer indicating what types of drawing caches are kept in memory.
boolean	getTouchscreenBlocksFocus() Check whether this ViewGroup should ignore focus requests for itself and its children.
boolean	hasFocus() Returns true if this view has or contains focus
boolean	hasFocusable() Returns true if this view is focusable or if it contains a reachable View for which `hasFocusable()` returns true.
boolean	hasTransientState() Indicates whether the view is currently tracking transient state that the app should not need to concern itself with saving and restoring, but that the framework should take special note to preserve when possible.
int	indexOfChild(View child) Returns the position in the group of the specified child view.
final void	invalidateChild(View child, Rect dirty) Don't call or override this method.
ViewParent	invalidateChildInParent(int[] location, Rect dirty) Don't call or override this method.
boolean	isAlwaysDrawnWithCacheEnabled() This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer have their caching behavior disabled by parents.
boolean	isAnimationCacheEnabled() This method was deprecated in API level 23. As of `M`, this property is ignored. Caching behavior of children may be controlled through `setLayerType(int, Paint)`.
boolean	isChildrenDrawingOrderEnabled() Indicates whether the ViewGroup is drawing its children in the order defined by `getChildDrawingOrder(int, int)`.
boolean	isChildrenDrawnWithCacheEnabled() This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer be forced to cache their rendering state by their parents. Use `setLayerType(int, Paint)` on individual Views instead.
boolean	isMotionEventSplittingEnabled() Returns true if MotionEvents dispatched to this ViewGroup can be split to multiple children.
boolean	isTransitionGroup() Returns true if this ViewGroup should be considered as a single entity for removal when executing an Activity transition.
void	jumpDrawablesToCurrentState() Call `Drawable.jumpToCurrentState()` on all Drawable objects associated with this view.
final void	layout(int l, int t, int r, int b) Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism.
void	measureChild(View child, int parentWidthMeasureSpec, int parentHeightMeasureSpec) Ask one of the children of this view to measure itself, taking into account both the MeasureSpec requirements for this view and its padding.
void	measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed) Ask one of the children of this view to measure itself, taking into account both the MeasureSpec requirements for this view and its padding and margins.
void	measureChildren(int widthMeasureSpec, int heightMeasureSpec) Ask all of the children of this view to measure themselves, taking into account both the MeasureSpec requirements for this view and its padding.
void	notifySubtreeAccessibilityStateChanged(View child, View source, int changeType) Notifies a view parent that the accessibility state of one of its descendants has changed and that the structure of the subtree is different.
final void	offsetDescendantRectToMyCoords(View descendant, Rect rect) Offset a rectangle that is in a descendant's coordinate space into our coordinate space.
final void	offsetRectIntoDescendantCoords(View descendant, Rect rect) Offset a rectangle that is in our coordinate space into an ancestor's coordinate space.
void	onAttachedToWindow() This is called when the view is attached to a window.
int[]	onCreateDrawableState(int extraSpace) Generate the new `Drawable` state for this view.
void	onDetachedFromWindow() This is called when the view is detached from a window.
boolean	onInterceptHoverEvent(MotionEvent event) Implement this method to intercept hover events before they are handled by child views.
boolean	onInterceptTouchEvent(MotionEvent ev) Implement this method to intercept all touch screen motion events.
abstract void	onLayout(boolean changed, int l, int t, int r, int b) Called from layout when this view should assign a size and position to each of its children.
boolean	onNestedFling(View target, float velocityX, float velocityY, boolean consumed) Request a fling from a nested scroll.
boolean	onNestedPreFling(View target, float velocityX, float velocityY) React to a nested fling before the target view consumes it.
boolean	onNestedPrePerformAccessibilityAction(View target, int action, Bundle args) React to an accessibility action delegated by a target descendant view before the target processes it. Subclasses should always call `super.onNestedPrePerformAccessibilityAction`
void	onNestedPreScroll(View target, int dx, int dy, int[] consumed) React to a nested scroll in progress before the target view consumes a portion of the scroll.
void	onNestedScroll(View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) React to a nested scroll in progress.
void	onNestedScrollAccepted(View child, View target, int axes) React to the successful claiming of a nested scroll operation.
boolean	onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) Look for a descendant to call `requestFocus()` on.
boolean	onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) Called when a child has requested sending an `AccessibilityEvent` and gives an opportunity to its parent to augment the event.
boolean	onStartNestedScroll(View child, View target, int nestedScrollAxes) React to a descendant view initiating a nestable scroll operation, claiming the nested scroll operation if appropriate.
void	onStopNestedScroll(View child) React to a nested scroll operation ending.
void	onViewAdded(View child) Called when a new child is added to this ViewGroup.
void	onViewRemoved(View child) Called when a child view is removed from this ViewGroup.
void	recomputeViewAttributes(View child) Tell view hierarchy that the global view attributes need to be re-evaluated.
void	removeAllViews() Call this method to remove all child views from the ViewGroup.
void	removeAllViewsInLayout() Called by a ViewGroup subclass to remove child views from itself, when it must first know its size on screen before it can calculate how many child views it will render.
void	removeDetachedView(View child, boolean animate) Finishes the removal of a detached view.
void	removeView(View view) Note: do not invoke this method from `draw(android.graphics.Canvas)`, `onDraw(android.graphics.Canvas)`, `dispatchDraw(android.graphics.Canvas)` or any related method.
void	removeViewAt(int index) Removes the view at the specified position in the group.
void	removeViewInLayout(View view) Removes a view during layout.
void	removeViews(int start, int count) Removes the specified range of views from the group.
void	removeViewsInLayout(int start, int count) Removes a range of views during layout.
void	requestChildFocus(View child, View focused) Called when a child of this parent wants focus
boolean	requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
void	requestDisallowInterceptTouchEvent(boolean disallowIntercept) Called when a child does not want this parent and its ancestors to intercept touch events with `onInterceptTouchEvent(MotionEvent)`.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. Looks for a view to give focus to respecting the setting specified by `getDescendantFocusability()`.
boolean	requestSendAccessibilityEvent(View child, AccessibilityEvent event) Called by a child to request from its parent to send an `AccessibilityEvent`.
void	requestTransparentRegion(View child) Called when a child wants the view hierarchy to gather and report transparent regions to the window compositor.
void	scheduleLayoutAnimation() Schedules the layout animation to be played after the next layout pass of this view group.
void	setAddStatesFromChildren(boolean addsStates) Sets whether this ViewGroup's drawable states also include its children's drawable states.
void	setAlwaysDrawnWithCacheEnabled(boolean always) This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer have their caching behavior disabled by parents.
void	setAnimationCacheEnabled(boolean enabled) This method was deprecated in API level 23. As of `M`, this property is ignored. Caching behavior of children may be controlled through `setLayerType(int, Paint)`.
void	setChildrenDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache for each child of this view group.
void	setChildrenDrawingOrderEnabled(boolean enabled) Tells the ViewGroup whether to draw its children in the order defined by the method `getChildDrawingOrder(int, int)`.
void	setChildrenDrawnWithCacheEnabled(boolean enabled) This method was deprecated in API level 23. As of `M`, this property is ignored. Child views may no longer be forced to cache their rendering state by their parents. Use `setLayerType(int, Paint)` on individual Views instead.
void	setClipChildren(boolean clipChildren) By default, children are clipped to their bounds before drawing.
void	setClipToPadding(boolean clipToPadding) Sets whether this ViewGroup will clip its children to its padding and resize (but not clip) any EdgeEffect to the padded region, if padding is present.
void	setDescendantFocusability(int focusability) Set the descendant focusability of this view group.
void	setLayoutAnimation(LayoutAnimationController controller) Sets the layout animation controller used to animate the group's children after the first layout.
void	setLayoutAnimationListener(Animation.AnimationListener animationListener) Specifies the animation listener to which layout animation events must be sent.
void	setLayoutMode(int layoutMode) Sets the basis of alignment during the layout of this ViewGroup.
void	setLayoutTransition(LayoutTransition transition) Sets the LayoutTransition object for this ViewGroup.
void	setMotionEventSplittingEnabled(boolean split) Enable or disable the splitting of MotionEvents to multiple children during touch event dispatch.
void	setOnHierarchyChangeListener(ViewGroup.OnHierarchyChangeListener listener) Register a callback to be invoked when a child is added to or removed from this view.
void	setPersistentDrawingCache(int drawingCacheToKeep) Indicates what types of drawing caches should be kept in memory after they have been created.
void	setStaticTransformationsEnabled(boolean enabled) When this property is set to true, this ViewGroup supports static transformations on children; this causes `getChildStaticTransformation(View, android.view.animation.Transformation)` to be invoked when a child is drawn.
void	setTouchscreenBlocksFocus(boolean touchscreenBlocksFocus) Set whether this ViewGroup should ignore focus requests for itself and its children.
void	setTransitionGroup(boolean isTransitionGroup) Changes whether or not this ViewGroup should be treated as a single entity during Activity Transitions.
boolean	shouldDelayChildPressedState() Return true if the pressed state should be delayed for children or descendants of this ViewGroup.
boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.
ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback) Start an action mode for the specified view with the default type `TYPE_PRIMARY`.
ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback, int type) Start an action mode of a specific type for the specified view.
void	startLayoutAnimation() Runs the layout animation.
void	startViewTransition(View view) This method tells the ViewGroup that the given View object, which should have this ViewGroup as its parent, should be kept around (re-displayed when the ViewGroup draws its children) even if it is removed from its parent.
void	updateViewLayout(View view, ViewGroup.LayoutParams params)

From class android.view.View

void	addChildrenForAccessibility(ArrayList<View> outChildren) Adds the children of this View relevant for accessibility to the given list as output.
void	addFocusables(ArrayList<View> views, int direction, int focusableMode) Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
void	addFocusables(ArrayList<View> views, int direction) Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.
void	addOnAttachStateChangeListener(View.OnAttachStateChangeListener listener) Add a listener for attach state changes.
void	addOnLayoutChangeListener(View.OnLayoutChangeListener listener) Add a listener that will be called when the bounds of the view change due to layout processing.
void	addTouchables(ArrayList<View> views) Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
ViewPropertyAnimator	animate() This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.
void	announceForAccessibility(CharSequence text) Convenience method for sending a `TYPE_ANNOUNCEMENT` `AccessibilityEvent` to make an announcement which is related to some sort of a context change for which none of the events representing UI transitions is a good fit.
boolean	awakenScrollBars(int startDelay) Trigger the scrollbars to draw.
boolean	awakenScrollBars(int startDelay, boolean invalidate) Trigger the scrollbars to draw.
boolean	awakenScrollBars() Trigger the scrollbars to draw.
void	bringToFront() Change the view's z order in the tree, so it's on top of other sibling views.
void	buildDrawingCache() Calling this method is equivalent to calling `buildDrawingCache(false)`.
void	buildDrawingCache(boolean autoScale) Forces the drawing cache to be built if the drawing cache is invalid.
void	buildLayer() Forces this view's layer to be created and this view to be rendered into its layer.
boolean	callOnClick() Directly call any attached OnClickListener.
boolean	canResolveLayoutDirection() Check if layout direction resolution can be done.
boolean	canResolveTextAlignment() Check if text alignment resolution can be done.
boolean	canResolveTextDirection() Check if text direction resolution can be done.
boolean	canScrollHorizontally(int direction) Check if this view can be scrolled horizontally in a certain direction.
boolean	canScrollVertically(int direction) Check if this view can be scrolled vertically in a certain direction.
void	cancelLongPress() Cancels a pending long press.
final void	cancelPendingInputEvents() Cancel any deferred high-level input events that were previously posted to the event queue.
boolean	checkInputConnectionProxy(View view) Called by the `InputMethodManager` when a view who is not the current input connection target is trying to make a call on the manager.
void	clearAnimation() Cancels any animations for this view.
void	clearFocus() Called when this view wants to give up focus.
static int	combineMeasuredStates(int curState, int newState) Merge two states as returned by `getMeasuredState()`.
int	computeHorizontalScrollExtent() Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollOffset() Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range.
int	computeHorizontalScrollRange() Compute the horizontal range that the horizontal scrollbar represents.
void	computeScroll() Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary.
WindowInsets	computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets) Compute insets that should be consumed by this view and the ones that should propagate to those under it.
int	computeVerticalScrollExtent() Compute the vertical extent of the vertical scrollbar's thumb within the vertical range.
int	computeVerticalScrollOffset() Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range.
int	computeVerticalScrollRange() Compute the vertical range that the vertical scrollbar represents.
AccessibilityNodeInfo	createAccessibilityNodeInfo() Returns an `AccessibilityNodeInfo` representing this view from the point of view of an `AccessibilityService`.
void	createContextMenu(ContextMenu menu) Show the context menu for this view.
void	destroyDrawingCache() Frees the resources used by the drawing cache.
WindowInsets	dispatchApplyWindowInsets(WindowInsets insets) Request to apply the given window insets to this view or another view in its subtree.
void	dispatchConfigurationChanged(Configuration newConfig) Dispatch a notification about a resource configuration change down the view hierarchy.
void	dispatchDisplayHint(int hint) Dispatch a hint about whether this view is displayed.
boolean	dispatchDragEvent(DragEvent event) Detects if this View is enabled and has a drag event listener.
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	dispatchDrawableHotspotChanged(float x, float y) Dispatches drawableHotspotChanged to all of this View's children.
boolean	dispatchGenericFocusedEvent(MotionEvent event) Dispatch a generic motion event to the currently focused view.
boolean	dispatchGenericMotionEvent(MotionEvent event) Dispatch a generic motion event.
boolean	dispatchGenericPointerEvent(MotionEvent event) Dispatch a generic motion event to the view under the first pointer.
boolean	dispatchHoverEvent(MotionEvent event) Dispatch a hover event.
boolean	dispatchKeyEvent(KeyEvent event) Dispatch a key event to the next view on the focus path.
boolean	dispatchKeyEventPreIme(KeyEvent event) Dispatch a key event before it is processed by any input method associated with the view hierarchy.
boolean	dispatchKeyShortcutEvent(KeyEvent event) Dispatches a key shortcut event.
boolean	dispatchNestedFling(float velocityX, float velocityY, boolean consumed) Dispatch a fling to a nested scrolling parent.
boolean	dispatchNestedPreFling(float velocityX, float velocityY) Dispatch a fling to a nested scrolling parent before it is processed by this view.
boolean	dispatchNestedPrePerformAccessibilityAction(int action, Bundle arguments) Report an accessibility action to this view's parents for delegated processing.
boolean	dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) Dispatch one step of a nested scroll in progress before this view consumes any portion of it.
boolean	dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow) Dispatch one step of a nested scroll in progress.
boolean	dispatchPopulateAccessibilityEvent(AccessibilityEvent event) Dispatches an `AccessibilityEvent` to the `View` first and then to its children for adding their text content to the event.
void	dispatchProvideStructure(ViewStructure structure) Dispatch creation of `ViewStructure` down the hierarchy.
void	dispatchRestoreInstanceState(SparseArray<Parcelable> container) Called by `restoreHierarchyState(android.util.SparseArray)` to retrieve the state for this view and its children.
void	dispatchSaveInstanceState(SparseArray<Parcelable> container) Called by `saveHierarchyState(android.util.SparseArray)` to store the state for this view and its children.
void	dispatchSetActivated(boolean activated) Dispatch setActivated to all of this View's children.
void	dispatchSetPressed(boolean pressed) Dispatch setPressed to all of this View's children.
void	dispatchSetSelected(boolean selected) Dispatch setSelected to all of this View's children.
void	dispatchSystemUiVisibilityChanged(int visibility) Dispatch callbacks to `setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener)` down the view hierarchy.
boolean	dispatchTouchEvent(MotionEvent event) Pass the touch screen motion event down to the target view, or this view if it is the target.
boolean	dispatchTrackballEvent(MotionEvent event) Pass a trackball motion event down to the focused view.
boolean	dispatchUnhandledMove(View focused, int direction) This method is the last chance for the focused view and its ancestors to respond to an arrow key.
void	dispatchVisibilityChanged(View changedView, int visibility) Dispatch a view visibility change down the view hierarchy.
void	dispatchWindowFocusChanged(boolean hasFocus) Called when the window containing this view gains or loses window focus.
void	dispatchWindowSystemUiVisiblityChanged(int visible) Dispatch callbacks to `onWindowSystemUiVisibilityChanged(int)` down the view hierarchy.
void	dispatchWindowVisibilityChanged(int visibility) Dispatch a window visibility change down the view hierarchy.
void	draw(Canvas canvas) Manually render this view (and all of its children) to the given Canvas.
void	drawableHotspotChanged(float x, float y) This function is called whenever the view hotspot changes and needs to be propagated to drawables or child views managed by the view.
void	drawableStateChanged() This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
View	findFocus() Find the view in the hierarchy rooted at this view that currently has focus.
final View	findViewById(int id) Look for a child view with the given id.
final View	findViewWithTag(Object tag) Look for a child view with the given tag.
void	findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) Finds the Views that contain given text.
boolean	fitSystemWindows(Rect insets) This method was deprecated in API level 20. As of API 20 use `dispatchApplyWindowInsets(WindowInsets)` to apply insets to views. Views should override `onApplyWindowInsets(WindowInsets)` or use `setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener)` to implement handling their own insets.
View	focusSearch(int direction) Find the nearest view in the specified direction that can take focus.
void	forceLayout() Forces this view to be laid out during the next layout pass.
static int	generateViewId() Generate a value suitable for use in `setId(int)`.
CharSequence	getAccessibilityClassName() Return the class name of this object to be used for accessibility purposes.
int	getAccessibilityLiveRegion() Gets the live region mode for this View.
AccessibilityNodeProvider	getAccessibilityNodeProvider() Gets the provider for managing a virtual view hierarchy rooted at this View and reported to `AccessibilityService`s that explore the window content.
int	getAccessibilityTraversalAfter() Gets the id of a view after which this one is visited in accessibility traversal.
int	getAccessibilityTraversalBefore() Gets the id of a view before which this one is visited in accessibility traversal.
float	getAlpha() The opacity of the view.
Animation	getAnimation() Get the animation currently associated with this view.
IBinder	getApplicationWindowToken() Retrieve a unique token identifying the top-level "real" window of the window that this view is attached to.
Drawable	getBackground() Gets the background drawable
ColorStateList	getBackgroundTintList() Return the tint applied to the background drawable, if specified.
PorterDuff.Mode	getBackgroundTintMode() Return the blending mode used to apply the tint to the background drawable, if specified.
int	getBaseline() Return the offset of the widget's text baseline from the widget's top boundary.
final int	getBottom() Bottom position of this view relative to its parent.
float	getBottomFadingEdgeStrength() Returns the strength, or intensity, of the bottom faded edge.
int	getBottomPaddingOffset() Amount by which to extend the bottom fading region.
float	getCameraDistance() Gets the distance along the Z axis from the camera to this view.
Rect	getClipBounds() Returns a copy of the current `clipBounds`.
boolean	getClipBounds(Rect outRect) Populates an output rectangle with the clip bounds of the view, returning `true` if successful or `false` if the view's clip bounds are `null`.
final boolean	getClipToOutline() Returns whether the Outline should be used to clip the contents of the View.
CharSequence	getContentDescription() Gets the `View` description.
final Context	getContext() Returns the context the view is running in, through which it can access the current theme, resources, etc.
ContextMenu.ContextMenuInfo	getContextMenuInfo() Views should implement this if they have extra information to associate with the context menu.
static int	getDefaultSize(int size, int measureSpec) Utility to return a default size.
Display	getDisplay() Gets the logical display to which the view's window has been attached.
final int[]	getDrawableState() Return an array of resource IDs of the drawable states representing the current state of the view.
Bitmap	getDrawingCache(boolean autoScale) Returns the bitmap in which this view drawing is cached.
Bitmap	getDrawingCache() Calling this method is equivalent to calling `getDrawingCache(false)`.
int	getDrawingCacheBackgroundColor()
int	getDrawingCacheQuality() Returns the quality of the drawing cache.
void	getDrawingRect(Rect outRect) Return the visible drawing bounds of your view.
long	getDrawingTime() Return the time at which the drawing of the view hierarchy started.
float	getElevation() The base elevation of this view relative to its parent, in pixels.
boolean	getFilterTouchesWhenObscured() Gets whether the framework should discard touches when the view's window is obscured by another visible window.
boolean	getFitsSystemWindows() Check for state of `setFitsSystemWindows(boolean)`.
ArrayList<View>	getFocusables(int direction) Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself.
void	getFocusedRect(Rect r) When a view has focus and the user navigates away from it, the next view is searched for starting from the rectangle filled in by this method.
Drawable	getForeground() Returns the drawable used as the foreground of this View.
int	getForegroundGravity() Describes how the foreground is positioned.
ColorStateList	getForegroundTintList() Return the tint applied to the foreground drawable, if specified.
PorterDuff.Mode	getForegroundTintMode() Return the blending mode used to apply the tint to the foreground drawable, if specified.
boolean	getGlobalVisibleRect(Rect r, Point globalOffset) If some part of this view is not clipped by any of its parents, then return that area in r in global (root) coordinates.
final boolean	getGlobalVisibleRect(Rect r)
Handler	getHandler()
final int	getHeight() Return the height of your view.
void	getHitRect(Rect outRect) Hit rectangle in parent's coordinates
int	getHorizontalFadingEdgeLength() Returns the size of the horizontal faded edges used to indicate that more content in this view is visible.
int	getHorizontalScrollbarHeight() Returns the height of the horizontal scrollbar.
int	getId() Returns this view's identifier.
int	getImportantForAccessibility() Gets the mode for determining whether this View is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen.
boolean	getKeepScreenOn() Returns whether the screen should remain on, corresponding to the current value of `KEEP_SCREEN_ON`.
KeyEvent.DispatcherState	getKeyDispatcherState() Return the global `KeyEvent.DispatcherState` for this view's window.
int	getLabelFor() Gets the id of a view for which this view serves as a label for accessibility purposes.
int	getLayerType() Indicates what type of layer is currently associated with this view.
int	getLayoutDirection() Returns the resolved layout direction for this view.
ViewGroup.LayoutParams	getLayoutParams() Get the LayoutParams associated with this view.
final int	getLeft() Left position of this view relative to its parent.
float	getLeftFadingEdgeStrength() Returns the strength, or intensity, of the left faded edge.
int	getLeftPaddingOffset() Amount by which to extend the left fading region.
final boolean	getLocalVisibleRect(Rect r)
void	getLocationInWindow(int[] location) Computes the coordinates of this view in its window.
void	getLocationOnScreen(int[] location) Computes the coordinates of this view on the screen.
Matrix	getMatrix() The transform matrix of this view, which is calculated based on the current rotation, scale, and pivot properties.
final int	getMeasuredHeight() Like `getMeasuredHeightAndState()`, but only returns the raw width component (that is the result is masked by `MEASURED_SIZE_MASK`).
final int	getMeasuredHeightAndState() Return the full height measurement information for this view as computed by the most recent call to `measure(int, int)`.
final int	getMeasuredState() Return only the state bits of `getMeasuredWidthAndState()` and `getMeasuredHeightAndState()`, combined into one integer.
final int	getMeasuredWidth() Like `getMeasuredWidthAndState()`, but only returns the raw width component (that is the result is masked by `MEASURED_SIZE_MASK`).
final int	getMeasuredWidthAndState() Return the full width measurement information for this view as computed by the most recent call to `measure(int, int)`.
int	getMinimumHeight() Returns the minimum height of the view.
int	getMinimumWidth() Returns the minimum width of the view.
int	getNextFocusDownId() Gets the id of the view to use when the next focus is `FOCUS_DOWN`.
int	getNextFocusForwardId() Gets the id of the view to use when the next focus is `FOCUS_FORWARD`.
int	getNextFocusLeftId() Gets the id of the view to use when the next focus is `FOCUS_LEFT`.
int	getNextFocusRightId() Gets the id of the view to use when the next focus is `FOCUS_RIGHT`.
int	getNextFocusUpId() Gets the id of the view to use when the next focus is `FOCUS_UP`.
View.OnFocusChangeListener	getOnFocusChangeListener() Returns the focus-change callback registered for this view.
ViewOutlineProvider	getOutlineProvider() Returns the current `ViewOutlineProvider` of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.
int	getOverScrollMode() Returns the over-scroll mode for this view.
ViewOverlay	getOverlay() Returns the overlay for this view, creating it if it does not yet exist.
int	getPaddingBottom() Returns the bottom padding of this view.
int	getPaddingEnd() Returns the end padding of this view depending on its resolved layout direction.
int	getPaddingLeft() Returns the left padding of this view.
int	getPaddingRight() Returns the right padding of this view.
int	getPaddingStart() Returns the start padding of this view depending on its resolved layout direction.
int	getPaddingTop() Returns the top padding of this view.
final ViewParent	getParent() Gets the parent of this view.
ViewParent	getParentForAccessibility() Gets the parent for accessibility purposes.
float	getPivotX() The x location of the point around which the view is `rotated` and `scaled`.
float	getPivotY() The y location of the point around which the view is `rotated` and `scaled`.
Resources	getResources() Returns the resources associated with this view.
final int	getRight() Right position of this view relative to its parent.
float	getRightFadingEdgeStrength() Returns the strength, or intensity, of the right faded edge.
int	getRightPaddingOffset() Amount by which to extend the right fading region.
View	getRootView() Finds the topmost view in the current view hierarchy.
WindowInsets	getRootWindowInsets() Provide original WindowInsets that are dispatched to the view hierarchy.
float	getRotation() The degrees that the view is rotated around the pivot point.
float	getRotationX() The degrees that the view is rotated around the horizontal axis through the pivot point.
float	getRotationY() The degrees that the view is rotated around the vertical axis through the pivot point.
float	getScaleX() The amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.
float	getScaleY() The amount that the view is scaled in y around the pivot point, as a proportion of the view's unscaled height.
int	getScrollBarDefaultDelayBeforeFade() Returns the delay before scrollbars fade.
int	getScrollBarFadeDuration() Returns the scrollbar fade duration.
int	getScrollBarSize() Returns the scrollbar size.
int	getScrollBarStyle() Returns the current scrollbar style.
int	getScrollIndicators() Returns a bitmask representing the enabled scroll indicators.
final int	getScrollX() Return the scrolled left position of this view.
final int	getScrollY() Return the scrolled top position of this view.
int	getSolidColor() Override this if your view is known to always be drawn on top of a solid color background, and needs to draw fading edges.
StateListAnimator	getStateListAnimator() Returns the current StateListAnimator if exists.
int	getSuggestedMinimumHeight() Returns the suggested minimum height that the view should use.
int	getSuggestedMinimumWidth() Returns the suggested minimum width that the view should use.
int	getSystemUiVisibility() Returns the last `setSystemUiVisibility(int)` that this view has requested.
Object	getTag(int key) Returns the tag associated with this view and the specified key.
Object	getTag() Returns this view's tag.
int	getTextAlignment() Return the resolved text alignment.
int	getTextDirection() Return the resolved text direction.
final int	getTop() Top position of this view relative to its parent.
float	getTopFadingEdgeStrength() Returns the strength, or intensity, of the top faded edge.
int	getTopPaddingOffset() Amount by which to extend the top fading region.
TouchDelegate	getTouchDelegate() Gets the TouchDelegate for this View.
ArrayList<View>	getTouchables() Find and return all touchable views that are descendants of this view, possibly including this view if it is touchable itself.
String	getTransitionName() Returns the name of the View to be used to identify Views in Transitions.
float	getTranslationX() The horizontal location of this view relative to its `left` position.
float	getTranslationY() The vertical location of this view relative to its `top` position.
float	getTranslationZ() The depth location of this view relative to its `elevation`.
int	getVerticalFadingEdgeLength() Returns the size of the vertical faded edges used to indicate that more content in this view is visible.
int	getVerticalScrollbarPosition()
int	getVerticalScrollbarWidth() Returns the width of the vertical scrollbar.
ViewTreeObserver	getViewTreeObserver() Returns the ViewTreeObserver for this view's hierarchy.
int	getVisibility() Returns the visibility status for this view.
final int	getWidth() Return the width of the your view.
int	getWindowAttachCount()
WindowId	getWindowId() Retrieve the `WindowId` for the window this view is currently attached to.
int	getWindowSystemUiVisibility() Returns the current system UI visibility that is currently set for the entire window.
IBinder	getWindowToken() Retrieve a unique token identifying the window this view is attached to.
int	getWindowVisibility() Returns the current visibility of the window this view is attached to (either `GONE`, `INVISIBLE`, or `VISIBLE`).
void	getWindowVisibleDisplayFrame(Rect outRect) Retrieve the overall visible display size in which the window this view is attached to has been positioned in.
float	getX() The visual x position of this view, in pixels.
float	getY() The visual y position of this view, in pixels.
float	getZ() The visual z position of this view, in pixels.
boolean	hasFocus() Returns true if this view has focus itself, or is the ancestor of the view that has focus.
boolean	hasFocusable() Returns true if this view is focusable or if it contains a reachable View for which `hasFocusable()` returns true.
boolean	hasNestedScrollingParent() Returns true if this view has a nested scrolling parent.
boolean	hasOnClickListeners() Return whether this view has an attached OnClickListener.
boolean	hasOverlappingRendering() Returns whether this View has content which overlaps.
boolean	hasTransientState() Indicates whether the view is currently tracking transient state that the app should not need to concern itself with saving and restoring, but that the framework should take special note to preserve when possible.
boolean	hasWindowFocus() Returns true if this view is in a window that currently has window focus.
static View	inflate(Context context, int resource, ViewGroup root) Inflate a view from an XML resource.
void	invalidate(Rect dirty) Mark the area defined by dirty as needing to be drawn.
void	invalidate(int l, int t, int r, int b) Mark the area defined by the rect (l,t,r,b) as needing to be drawn.
void	invalidate() Invalidate the whole view.
void	invalidateDrawable(Drawable drawable) Invalidates the specified Drawable.
void	invalidateOutline() Called to rebuild this View's Outline from its `outline provider`
boolean	isAccessibilityFocused() Returns whether this View is accessibility focused.
boolean	isActivated() Indicates the activation state of this view.
boolean	isAttachedToWindow() Returns true if this view is currently attached to a window.
boolean	isClickable() Indicates whether this view reacts to click events or not.
boolean	isContextClickable() Indicates whether this view reacts to context clicks or not.
boolean	isDirty() True if this view has changed since the last time being drawn.
boolean	isDrawingCacheEnabled() Indicates whether the drawing cache is enabled for this view.
boolean	isDuplicateParentStateEnabled() Indicates whether this duplicates its drawable state from its parent.
boolean	isEnabled() Returns the enabled status for this view.
final boolean	isFocusable() Returns whether this View is able to take focus.
final boolean	isFocusableInTouchMode() When a view is focusable, it may not want to take focus when in touch mode.
boolean	isFocused() Returns true if this view has focus
boolean	isHapticFeedbackEnabled()
boolean	isHardwareAccelerated() Indicates whether this view is attached to a hardware accelerated window or not.
boolean	isHorizontalFadingEdgeEnabled() Indicate whether the horizontal edges are faded when the view is scrolled horizontally.
boolean	isHorizontalScrollBarEnabled() Indicate whether the horizontal scrollbar should be drawn or not.
boolean	isHovered() Returns true if the view is currently hovered.
boolean	isImportantForAccessibility() Computes whether this view should be exposed for accessibility.
boolean	isInEditMode() Indicates whether this View is currently in edit mode.
boolean	isInLayout() Returns whether the view hierarchy is currently undergoing a layout pass.
boolean	isInTouchMode() Returns whether the device is currently in touch mode.
boolean	isLaidOut() Returns true if this view has been through at least one layout since it was last attached to or detached from a window.
boolean	isLayoutDirectionResolved()
boolean	isLayoutRequested() Indicates whether or not this view's layout will be requested during the next hierarchy layout pass.
boolean	isLongClickable() Indicates whether this view reacts to long click events or not.
boolean	isNestedScrollingEnabled() Returns true if nested scrolling is enabled for this view.
boolean	isOpaque() Indicates whether this View is opaque.
boolean	isPaddingOffsetRequired() If the View draws content inside its padding and enables fading edges, it needs to support padding offsets.
boolean	isPaddingRelative() Return if the padding has been set through relative values `setPaddingRelative(int, int, int, int)` or through
boolean	isPressed() Indicates whether the view is currently in pressed state.
boolean	isSaveEnabled() Indicates whether this view will save its state (that is, whether its `onSaveInstanceState()` method will be called).
boolean	isSaveFromParentEnabled() Indicates whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.
boolean	isScrollContainer() Indicates whether this view is one of the set of scrollable containers in its window.
boolean	isScrollbarFadingEnabled() Returns true if scrollbars will fade when this view is not scrolling
boolean	isSelected() Indicates the selection state of this view.
boolean	isShown() Returns the visibility of this view and all of its ancestors
boolean	isSoundEffectsEnabled()
boolean	isTextAlignmentResolved()
boolean	isTextDirectionResolved()
boolean	isVerticalFadingEdgeEnabled() Indicate whether the vertical edges are faded when the view is scrolled horizontally.
boolean	isVerticalScrollBarEnabled() Indicate whether the vertical scrollbar should be drawn or not.
void	jumpDrawablesToCurrentState() Call `Drawable.jumpToCurrentState()` on all Drawable objects associated with this view.
void	layout(int l, int t, int r, int b) Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism.
final void	measure(int widthMeasureSpec, int heightMeasureSpec) This is called to find out how big a view should be.
static int[]	mergeDrawableStates(int[] baseState, int[] additionalState) Merge your own state values in `additionalState` into the base state values `baseState` that were returned by `onCreateDrawableState(int)`.
void	offsetLeftAndRight(int offset) Offset this view's horizontal location by the specified amount of pixels.
void	offsetTopAndBottom(int offset) Offset this view's vertical location by the specified number of pixels.
void	onAnimationEnd() Invoked by a parent ViewGroup to notify the end of the animation currently associated with this view.
void	onAnimationStart() Invoked by a parent ViewGroup to notify the start of the animation currently associated with this view.
WindowInsets	onApplyWindowInsets(WindowInsets insets) Called when the view should apply `WindowInsets` according to its internal policy.
void	onAttachedToWindow() This is called when the view is attached to a window.
void	onCancelPendingInputEvents() Called as the result of a call to `cancelPendingInputEvents()` on this view or a parent view.
boolean	onCheckIsTextEditor() Check whether the called view is a text editor, in which case it would make sense to automatically display a soft input window for it.
void	onConfigurationChanged(Configuration newConfig) Called when the current configuration of the resources being used by the application have changed.
void	onCreateContextMenu(ContextMenu menu) Views should implement this if the view itself is going to add items to the context menu.
int[]	onCreateDrawableState(int extraSpace) Generate the new `Drawable` state for this view.
InputConnection	onCreateInputConnection(EditorInfo outAttrs) Create a new InputConnection for an InputMethod to interact with the view.
void	onDetachedFromWindow() This is called when the view is detached from a window.
void	onDisplayHint(int hint) Gives this view a hint about whether is displayed or not.
boolean	onDragEvent(DragEvent event) Handles drag events sent by the system following a call to `startDrag()`.
void	onDraw(Canvas canvas) Implement this to do your drawing.
void	onDrawForeground(Canvas canvas) Draw any foreground content for this view.
final void	onDrawScrollBars(Canvas canvas) Request the drawing of the horizontal and the vertical scrollbar.
boolean	onFilterTouchEventForSecurity(MotionEvent event) Filter the touch event to apply security policies.
void	onFinishInflate() Finalize inflating a view from XML.
void	onFinishTemporaryDetach() Called after `onStartTemporaryDetach()` when the container is done changing the view.
void	onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) Called by the view system when the focus state of this view changes.
boolean	onGenericMotionEvent(MotionEvent event) Implement this method to handle generic motion events.
void	onHoverChanged(boolean hovered) Implement this method to handle hover state changes.
boolean	onHoverEvent(MotionEvent event) Implement this method to handle hover events.
void	onInitializeAccessibilityEvent(AccessibilityEvent event) Initializes an `AccessibilityEvent` with information about this View which is the event source.
void	onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) Initializes an `AccessibilityNodeInfo` with information about this view.
boolean	onKeyDown(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyDown()`: perform press of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released, if the view is enabled and clickable.
boolean	onKeyLongPress(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyLongPress()`: always returns false (doesn't handle the event).
boolean	onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyMultiple()`: always returns false (doesn't handle the event).
boolean	onKeyPreIme(int keyCode, KeyEvent event) Handle a key event before it is processed by any input method associated with the view hierarchy.
boolean	onKeyShortcut(int keyCode, KeyEvent event) Called on the focused view when a key shortcut event is not handled.
boolean	onKeyUp(int keyCode, KeyEvent event) Default implementation of `KeyEvent.Callback.onKeyUp()`: perform clicking of the view when `KEYCODE_DPAD_CENTER` or `KEYCODE_ENTER` is released.
void	onLayout(boolean changed, int left, int top, int right, int bottom) Called from layout when this view should assign a size and position to each of its children.
void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
void	onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) Called by `overScrollBy(int, int, int, int, int, int, int, int, boolean)` to respond to the results of an over-scroll operation.
void	onPopulateAccessibilityEvent(AccessibilityEvent event) Called from `dispatchPopulateAccessibilityEvent(AccessibilityEvent)` giving a chance to this View to populate the accessibility event with its text content.
void	onProvideStructure(ViewStructure structure) Called when assist structure is being retrieved from a view as part of `Activity.onProvideAssistData`.
void	onProvideVirtualStructure(ViewStructure structure) Called when assist structure is being retrieved from a view as part of `Activity.onProvideAssistData` to generate additional virtual structure under this view.
void	onRestoreInstanceState(Parcelable state) Hook allowing a view to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
void	onRtlPropertiesChanged(int layoutDirection) Called when any RTL property (layout direction or text direction or text alignment) has been changed.
Parcelable	onSaveInstanceState() Hook allowing a view to generate a representation of its internal state that can later be used to create a new instance with that same state.
void	onScreenStateChanged(int screenState) This method is called whenever the state of the screen this view is attached to changes.
void	onScrollChanged(int l, int t, int oldl, int oldt) This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents).
boolean	onSetAlpha(int alpha) Invoked if there is a Transform that involves alpha.
void	onSizeChanged(int w, int h, int oldw, int oldh) This is called during layout when the size of this view has changed.
void	onStartTemporaryDetach() This is called when a container is going to temporarily detach a child, with `ViewGroup.detachViewFromParent`.
boolean	onTouchEvent(MotionEvent event) Implement this method to handle touch screen motion events.
boolean	onTrackballEvent(MotionEvent event) Implement this method to handle trackball motion events.
void	onVisibilityChanged(View changedView, int visibility) Called when the visibility of the view or an ancestor of the view has changed.
void	onWindowFocusChanged(boolean hasWindowFocus) Called when the window containing this view gains or loses focus.
void	onWindowSystemUiVisibilityChanged(int visible) Override to find out when the window's requested system UI visibility has changed, that is the value returned by `getWindowSystemUiVisibility()`.
void	onWindowVisibilityChanged(int visibility) Called when the window containing has change its visibility (between `GONE`, `INVISIBLE`, and `VISIBLE`).
boolean	overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) Scroll the view with standard behavior for scrolling beyond the normal content boundaries.
boolean	performAccessibilityAction(int action, Bundle arguments) Performs the specified accessibility action on the view.
boolean	performClick() Call this view's OnClickListener, if it is defined.
boolean	performContextClick() Call this view's OnContextClickListener, if it is defined.
boolean	performHapticFeedback(int feedbackConstant) BZZZTT!!1! Provide haptic feedback to the user for this view.
boolean	performHapticFeedback(int feedbackConstant, int flags) BZZZTT!!1! Like `performHapticFeedback(int)`, with additional options.
boolean	performLongClick() Call this view's OnLongClickListener, if it is defined.
void	playSoundEffect(int soundConstant) Play a sound effect for this view.
boolean	post(Runnable action) Causes the Runnable to be added to the message queue.
boolean	postDelayed(Runnable action, long delayMillis) Causes the Runnable to be added to the message queue, to be run after the specified amount of time elapses.
void	postInvalidate(int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidate() Cause an invalidate to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds, int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.
void	postInvalidateDelayed(long delayMilliseconds) Cause an invalidate to happen on a subsequent cycle through the event loop.
void	postInvalidateOnAnimation(int left, int top, int right, int bottom) Cause an invalidate of the specified area to happen on the next animation time step, typically the next display frame.
void	postInvalidateOnAnimation() Cause an invalidate to happen on the next animation time step, typically the next display frame.
void	postOnAnimation(Runnable action) Causes the Runnable to execute on the next animation time step.
void	postOnAnimationDelayed(Runnable action, long delayMillis) Causes the Runnable to execute on the next animation time step, after the specified amount of time elapses.
void	refreshDrawableState() Call this to force a view to update its drawable state.
boolean	removeCallbacks(Runnable action) Removes the specified Runnable from the message queue.
void	removeOnAttachStateChangeListener(View.OnAttachStateChangeListener listener) Remove a listener for attach state changes.
void	removeOnLayoutChangeListener(View.OnLayoutChangeListener listener) Remove a listener for layout changes.
void	requestApplyInsets() Ask that a new dispatch of `onApplyWindowInsets(WindowInsets)` be performed.
void	requestFitSystemWindows() This method was deprecated in API level 20. Use `requestApplyInsets()` for newer platform versions.
boolean	requestFocus(int direction, Rect previouslyFocusedRect) Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from.
final boolean	requestFocus(int direction) Call this to try to give focus to a specific view or to one of its descendants and give it a hint about what direction focus is heading.
final boolean	requestFocus() Call this to try to give focus to a specific view or to one of its descendants.
final boolean	requestFocusFromTouch() Call this to try to give focus to a specific view or to one of its descendants.
void	requestLayout() Call this when something has changed which has invalidated the layout of this view.
boolean	requestRectangleOnScreen(Rect rectangle) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
boolean	requestRectangleOnScreen(Rect rectangle, boolean immediate) Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.
final void	requestUnbufferedDispatch(MotionEvent event) Request unbuffered dispatch of the given stream of MotionEvents to this View.
static int	resolveSize(int size, int measureSpec) Version of `resolveSizeAndState(int, int, int)` returning only the `MEASURED_SIZE_MASK` bits of the result.
static int	resolveSizeAndState(int size, int measureSpec, int childMeasuredState) Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec.
void	restoreHierarchyState(SparseArray<Parcelable> container) Restore this view hierarchy's frozen state from the given container.
void	saveHierarchyState(SparseArray<Parcelable> container) Store this view hierarchy's frozen state into the given container.
void	scheduleDrawable(Drawable who, Runnable what, long when) Schedules an action on a drawable to occur at a specified time.
void	scrollBy(int x, int y) Move the scrolled position of your view.
void	scrollTo(int x, int y) Set the scrolled position of your view.
void	sendAccessibilityEvent(int eventType) Sends an accessibility event of the given type.
void	sendAccessibilityEventUnchecked(AccessibilityEvent event) This method behaves exactly as `sendAccessibilityEvent(int)` but takes as an argument an empty `AccessibilityEvent` and does not perform a check whether accessibility is enabled.
void	setAccessibilityDelegate(View.AccessibilityDelegate delegate) Sets a delegate for implementing accessibility support via composition as opposed to inheritance.
void	setAccessibilityLiveRegion(int mode) Sets the live region mode for this view.
void	setAccessibilityTraversalAfter(int afterId) Sets the id of a view after which this one is visited in accessibility traversal.
void	setAccessibilityTraversalBefore(int beforeId) Sets the id of a view before which this one is visited in accessibility traversal.
void	setActivated(boolean activated) Changes the activated state of this view.
void	setAlpha(float alpha) Sets the opacity of the view to a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque.
void	setAnimation(Animation animation) Sets the next animation to play for this view.
void	setBackground(Drawable background) Set the background to a given Drawable, or remove the background.
void	setBackgroundColor(int color) Sets the background color for this view.
void	setBackgroundDrawable(Drawable background) This method was deprecated in API level 16. use `setBackground(Drawable)` instead
void	setBackgroundResource(int resid) Set the background to a given resource.
void	setBackgroundTintList(ColorStateList tint) Applies a tint to the background drawable.
void	setBackgroundTintMode(PorterDuff.Mode tintMode) Specifies the blending mode used to apply the tint specified by `setBackgroundTintList(ColorStateList)`} to the background drawable.
final void	setBottom(int bottom) Sets the bottom position of this view relative to its parent.
void	setCameraDistance(float distance) Sets the distance along the Z axis (orthogonal to the X/Y plane on which views are drawn) from the camera to this view.
void	setClickable(boolean clickable) Enables or disables click events for this view.
void	setClipBounds(Rect clipBounds) Sets a rectangular area on this view to which the view will be clipped when it is drawn.
void	setClipToOutline(boolean clipToOutline) Sets whether the View's Outline should be used to clip the contents of the View.
void	setContentDescription(CharSequence contentDescription) Sets the `View` description.
void	setContextClickable(boolean contextClickable) Enables or disables context clicking for this view.
void	setDrawingCacheBackgroundColor(int color) Setting a solid background color for the drawing cache's bitmaps will improve performance and memory usage.
void	setDrawingCacheEnabled(boolean enabled) Enables or disables the drawing cache.
void	setDrawingCacheQuality(int quality) Set the drawing cache quality of this view.
void	setDuplicateParentStateEnabled(boolean enabled) Enables or disables the duplication of the parent's state into this view.
void	setElevation(float elevation) Sets the base elevation of this view, in pixels.
void	setEnabled(boolean enabled) Set the enabled state of this view.
void	setFadingEdgeLength(int length) Set the size of the faded edge used to indicate that more content in this view is available.
void	setFilterTouchesWhenObscured(boolean enabled) Sets whether the framework should discard touches when the view's window is obscured by another visible window.
void	setFitsSystemWindows(boolean fitSystemWindows) Sets whether or not this view should account for system screen decorations such as the status bar and inset its content; that is, controlling whether the default implementation of `fitSystemWindows(Rect)` will be executed.
void	setFocusable(boolean focusable) Set whether this view can receive the focus.
void	setFocusableInTouchMode(boolean focusableInTouchMode) Set whether this view can receive focus while in touch mode.
void	setForeground(Drawable foreground) Supply a Drawable that is to be rendered on top of all of the content in the view.
void	setForegroundGravity(int gravity) Describes how the foreground is positioned.
void	setForegroundTintList(ColorStateList tint) Applies a tint to the foreground drawable.
void	setForegroundTintMode(PorterDuff.Mode tintMode) Specifies the blending mode used to apply the tint specified by `setForegroundTintList(ColorStateList)`} to the background drawable.
void	setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) Set whether this view should have haptic feedback for events such as long presses.
void	setHasTransientState(boolean hasTransientState) Set whether this view is currently tracking transient state that the framework should attempt to preserve when possible.
void	setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) Define whether the horizontal edges should be faded when this view is scrolled horizontally.
void	setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) Define whether the horizontal scrollbar should be drawn or not.
void	setHovered(boolean hovered) Sets whether the view is currently hovered.
void	setId(int id) Sets the identifier for this view.
void	setImportantForAccessibility(int mode) Sets how to determine whether this view is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen.
void	setKeepScreenOn(boolean keepScreenOn) Controls whether the screen should remain on, modifying the value of `KEEP_SCREEN_ON`.
void	setLabelFor(int id) Sets the id of a view for which this view serves as a label for accessibility purposes.
void	setLayerPaint(Paint paint) Updates the `Paint` object used with the current layer (used only if the current layer type is not set to `LAYER_TYPE_NONE`).
void	setLayerType(int layerType, Paint paint) Specifies the type of layer backing this view.
void	setLayoutDirection(int layoutDirection) Set the layout direction for this view.
void	setLayoutParams(ViewGroup.LayoutParams params) Set the layout parameters associated with this view.
final void	setLeft(int left) Sets the left position of this view relative to its parent.
void	setLongClickable(boolean longClickable) Enables or disables long click events for this view.
final void	setMeasuredDimension(int measuredWidth, int measuredHeight) This method must be called by `onMeasure(int, int)` to store the measured width and measured height.
void	setMinimumHeight(int minHeight) Sets the minimum height of the view.
void	setMinimumWidth(int minWidth) Sets the minimum width of the view.
void	setNestedScrollingEnabled(boolean enabled) Enable or disable nested scrolling for this view.
void	setNextFocusDownId(int nextFocusDownId) Sets the id of the view to use when the next focus is `FOCUS_DOWN`.
void	setNextFocusForwardId(int nextFocusForwardId) Sets the id of the view to use when the next focus is `FOCUS_FORWARD`.
void	setNextFocusLeftId(int nextFocusLeftId) Sets the id of the view to use when the next focus is `FOCUS_LEFT`.
void	setNextFocusRightId(int nextFocusRightId) Sets the id of the view to use when the next focus is `FOCUS_RIGHT`.
void	setNextFocusUpId(int nextFocusUpId) Sets the id of the view to use when the next focus is `FOCUS_UP`.
void	setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener listener) Set an `View.OnApplyWindowInsetsListener` to take over the policy for applying window insets to this view.
void	setOnClickListener(View.OnClickListener l) Register a callback to be invoked when this view is clicked.
void	setOnContextClickListener(View.OnContextClickListener l) Register a callback to be invoked when this view is context clicked.
void	setOnCreateContextMenuListener(View.OnCreateContextMenuListener l) Register a callback to be invoked when the context menu for this view is being built.
void	setOnDragListener(View.OnDragListener l) Register a drag event listener callback object for this View.
void	setOnFocusChangeListener(View.OnFocusChangeListener l) Register a callback to be invoked when focus of this view changed.
void	setOnGenericMotionListener(View.OnGenericMotionListener l) Register a callback to be invoked when a generic motion event is sent to this view.
void	setOnHoverListener(View.OnHoverListener l) Register a callback to be invoked when a hover event is sent to this view.
void	setOnKeyListener(View.OnKeyListener l) Register a callback to be invoked when a hardware key is pressed in this view.
void	setOnLongClickListener(View.OnLongClickListener l) Register a callback to be invoked when this view is clicked and held.
void	setOnScrollChangeListener(View.OnScrollChangeListener l) Register a callback to be invoked when the scroll X or Y positions of this view change.
void	setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener l) Set a listener to receive callbacks when the visibility of the system bar changes.
void	setOnTouchListener(View.OnTouchListener l) Register a callback to be invoked when a touch event is sent to this view.
void	setOutlineProvider(ViewOutlineProvider provider) Sets the `ViewOutlineProvider` of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.
void	setOverScrollMode(int overScrollMode) Set the over-scroll mode for this view.
void	setPadding(int left, int top, int right, int bottom) Sets the padding.
void	setPaddingRelative(int start, int top, int end, int bottom) Sets the relative padding.
void	setPivotX(float pivotX) Sets the x location of the point around which the view is `rotated` and `scaled`.
void	setPivotY(float pivotY) Sets the y location of the point around which the view is `rotated` and `scaled`.
void	setPressed(boolean pressed) Sets the pressed state for this view.
final void	setRight(int right) Sets the right position of this view relative to its parent.
void	setRotation(float rotation) Sets the degrees that the view is rotated around the pivot point.
void	setRotationX(float rotationX) Sets the degrees that the view is rotated around the horizontal axis through the pivot point.
void	setRotationY(float rotationY) Sets the degrees that the view is rotated around the vertical axis through the pivot point.
void	setSaveEnabled(boolean enabled) Controls whether the saving of this view's state is enabled (that is, whether its `onSaveInstanceState()` method will be called).
void	setSaveFromParentEnabled(boolean enabled) Controls whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.
void	setScaleX(float scaleX) Sets the amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.
void	setScaleY(float scaleY) Sets the amount that the view is scaled in Y around the pivot point, as a proportion of the view's unscaled width.
void	setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) Define the delay before scrollbars fade.
void	setScrollBarFadeDuration(int scrollBarFadeDuration) Define the scrollbar fade duration.
void	setScrollBarSize(int scrollBarSize) Define the scrollbar size.
void	setScrollBarStyle(int style) Specify the style of the scrollbars.
void	setScrollContainer(boolean isScrollContainer) Change whether this view is one of the set of scrollable containers in its window.
void	setScrollIndicators(int indicators, int mask) Sets the state of the scroll indicators specified by the mask.
void	setScrollIndicators(int indicators) Sets the state of all scroll indicators.
void	setScrollX(int value) Set the horizontal scrolled position of your view.
void	setScrollY(int value) Set the vertical scrolled position of your view.
void	setScrollbarFadingEnabled(boolean fadeScrollbars) Define whether scrollbars will fade when the view is not scrolling.
void	setSelected(boolean selected) Changes the selection state of this view.
void	setSoundEffectsEnabled(boolean soundEffectsEnabled) Set whether this view should have sound effects enabled for events such as clicking and touching.
void	setStateListAnimator(StateListAnimator stateListAnimator) Attaches the provided StateListAnimator to this View.
void	setSystemUiVisibility(int visibility) Request that the visibility of the status bar or other screen/window decorations be changed.
void	setTag(int key, Object tag) Sets a tag associated with this view and a key.
void	setTag(Object tag) Sets the tag associated with this view.
void	setTextAlignment(int textAlignment) Set the text alignment.
void	setTextDirection(int textDirection) Set the text direction.
final void	setTop(int top) Sets the top position of this view relative to its parent.
void	setTouchDelegate(TouchDelegate delegate) Sets the TouchDelegate for this View.
final void	setTransitionName(String transitionName) Sets the name of the View to be used to identify Views in Transitions.
void	setTranslationX(float translationX) Sets the horizontal location of this view relative to its `left` position.
void	setTranslationY(float translationY) Sets the vertical location of this view relative to its `top` position.
void	setTranslationZ(float translationZ) Sets the depth location of this view relative to its `elevation`.
void	setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) Define whether the vertical edges should be faded when this view is scrolled vertically.
void	setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) Define whether the vertical scrollbar should be drawn or not.
void	setVerticalScrollbarPosition(int position) Set the position of the vertical scroll bar.
void	setVisibility(int visibility) Set the enabled state of this view.
void	setWillNotCacheDrawing(boolean willNotCacheDrawing) When a View's drawing cache is enabled, drawing is redirected to an offscreen bitmap.
void	setWillNotDraw(boolean willNotDraw) If this view doesn't do any drawing on its own, set this flag to allow further optimizations.
void	setX(float x) Sets the visual x position of this view, in pixels.
void	setY(float y) Sets the visual y position of this view, in pixels.
void	setZ(float z) Sets the visual z position of this view, in pixels.
boolean	showContextMenu() Bring up the context menu for this view.
ActionMode	startActionMode(ActionMode.Callback callback, int type) Start an action mode with the given type.
ActionMode	startActionMode(ActionMode.Callback callback) Start an action mode with the default type `TYPE_PRIMARY`.
void	startAnimation(Animation animation) Start the specified animation now.
final boolean	startDrag(ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags) Starts a drag and drop operation.
boolean	startNestedScroll(int axes) Begin a nestable scroll operation along the given axes.
void	stopNestedScroll() Stop a nested scroll in progress.
String	toString() Returns a string containing a concise, human-readable description of this object.
void	unscheduleDrawable(Drawable who) Unschedule any events associated with the given Drawable.
void	unscheduleDrawable(Drawable who, Runnable what) Cancels a scheduled action on a drawable.
boolean	verifyDrawable(Drawable who) If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying.
boolean	willNotCacheDrawing() Returns whether or not this View can cache its drawing or not.
boolean	willNotDraw() Returns whether or not this View draws on its own.

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

From interface android.view.ViewParent

abstract void	bringChildToFront(View child) Change the z order of the child so it's on top of all other children.
abstract boolean	canResolveLayoutDirection() Tells if this view parent can resolve the layout direction.
abstract boolean	canResolveTextAlignment() Tells if this view parent can resolve the text alignment.
abstract boolean	canResolveTextDirection() Tells if this view parent can resolve the text direction.
abstract void	childDrawableStateChanged(View child) This method is called on the parent when a child's drawable state has changed.
abstract void	childHasTransientStateChanged(View child, boolean hasTransientState) Called when a child view now has or no longer is tracking transient state.
abstract void	clearChildFocus(View child) Called when a child of this parent is giving up focus
abstract void	createContextMenu(ContextMenu menu) Have the parent populate the specified context menu if it has anything to add (and then recurse on its parent).
abstract View	focusSearch(View v, int direction) Find the nearest view in the specified direction that wants to take focus
abstract void	focusableViewAvailable(View v) Tells the parent that a new focusable view has become available.
abstract boolean	getChildVisibleRect(View child, Rect r, Point offset) Compute the visible part of a rectangular region defined in terms of a child view's coordinates.
abstract int	getLayoutDirection() Return this view parent layout direction.
abstract ViewParent	getParent() Returns the parent if it exists, or null.
abstract ViewParent	getParentForAccessibility() Gets the parent of a given View for accessibility.
abstract int	getTextAlignment() Return this view parent text alignment.
abstract int	getTextDirection() Return this view parent text direction.
abstract void	invalidateChild(View child, Rect r) All or part of a child is dirty and needs to be redrawn.
abstract ViewParent	invalidateChildInParent(int[] location, Rect r) All or part of a child is dirty and needs to be redrawn.
abstract boolean	isLayoutDirectionResolved() Tells if this view parent layout direction is resolved.
abstract boolean	isLayoutRequested() Indicates whether layout was requested on this view parent.
abstract boolean	isTextAlignmentResolved() Tells if this view parent text alignment is resolved.
abstract boolean	isTextDirectionResolved() Tells if this view parent text direction is resolved.
abstract void	notifySubtreeAccessibilityStateChanged(View child, View source, int changeType) Notifies a view parent that the accessibility state of one of its descendants has changed and that the structure of the subtree is different.
abstract boolean	onNestedFling(View target, float velocityX, float velocityY, boolean consumed) Request a fling from a nested scroll.
abstract boolean	onNestedPreFling(View target, float velocityX, float velocityY) React to a nested fling before the target view consumes it.
abstract boolean	onNestedPrePerformAccessibilityAction(View target, int action, Bundle arguments) React to an accessibility action delegated by a target descendant view before the target processes it.
abstract void	onNestedPreScroll(View target, int dx, int dy, int[] consumed) React to a nested scroll in progress before the target view consumes a portion of the scroll.
abstract void	onNestedScroll(View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) React to a nested scroll in progress.
abstract void	onNestedScrollAccepted(View child, View target, int nestedScrollAxes) React to the successful claiming of a nested scroll operation.
abstract boolean	onStartNestedScroll(View child, View target, int nestedScrollAxes) React to a descendant view initiating a nestable scroll operation, claiming the nested scroll operation if appropriate.
abstract void	onStopNestedScroll(View target) React to a nested scroll operation ending.
abstract void	recomputeViewAttributes(View child) Tell view hierarchy that the global view attributes need to be re-evaluated.
abstract void	requestChildFocus(View child, View focused) Called when a child of this parent wants focus
abstract boolean	requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) Called when a child of this group wants a particular rectangle to be positioned onto the screen.
abstract void	requestDisallowInterceptTouchEvent(boolean disallowIntercept) Called when a child does not want this parent and its ancestors to intercept touch events with `onInterceptTouchEvent(MotionEvent)`.
abstract void	requestFitSystemWindows() Ask that a new dispatch of `View.fitSystemWindows(Rect)` be performed.
abstract void	requestLayout() Called when something has changed which has invalidated the layout of a child of this view parent.
abstract boolean	requestSendAccessibilityEvent(View child, AccessibilityEvent event) Called by a child to request from its parent to send an `AccessibilityEvent`.
abstract void	requestTransparentRegion(View child) Called when a child wants the view hierarchy to gather and report transparent regions to the window compositor.
abstract boolean	showContextMenuForChild(View originalView) Bring up a context menu for the specified view or its ancestors.
abstract ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback, int type) Start an action mode of a specific type for the specified view.
abstract ActionMode	startActionModeForChild(View originalView, ActionMode.Callback callback) Start an action mode for the specified view with the default type `TYPE_PRIMARY`.

From interface android.view.ViewManager

From interface android.graphics.drawable.Drawable.Callback

From interface android.view.KeyEvent.Callback

From interface android.view.accessibility.AccessibilityEventSource

From interface android.view.ViewTreeObserver.OnGlobalFocusChangeListener

From interface android.view.ViewGroup.OnHierarchyChangeListener

Constants

public static final String SCHEME_GEO

Added in API level 1

URI scheme for map address.

Constant Value: "geo:0,0?q="

public static final String SCHEME_MAILTO

Added in API level 1

URI scheme for email address.

Constant Value: "mailto:"

public static final String SCHEME_TEL

Added in API level 1

URI scheme for telephone number.

Constant Value: "tel:"

Public Constructors

public WebView (Context context)

Added in API level 1

Constructs a new WebView with a Context object.

Parameters

context	a Context object used to access application assets

public WebView (Context context, AttributeSet attrs)

Added in API level 1

Constructs a new WebView with layout parameters.

Parameters

context	a Context object used to access application assets
attrs	an AttributeSet passed to our parent

public WebView (Context context, AttributeSet attrs, int defStyleAttr)

Added in API level 1

Constructs a new WebView with layout parameters and a default style.

Parameters

context	a Context object used to access application assets
attrs	an AttributeSet passed to our parent
defStyleAttr	an attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.

public WebView (Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)

Added in API level 21

Constructs a new WebView with layout parameters and a default style.

Parameters

context	a Context object used to access application assets
attrs	an AttributeSet passed to our parent
defStyleAttr	an attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.
defStyleRes	a resource identifier of a style resource that supplies default values for the view, used only if defStyleAttr is 0 or can not be found in the theme. Can be 0 to not look for defaults.

public WebView (Context context, AttributeSet attrs, int defStyleAttr, boolean privateBrowsing)

Added in API level 11

This constructor was deprecated in API level 17.
Private browsing is no longer supported directly via WebView and will be removed in a future release. Prefer using WebSettings, WebViewDatabase, CookieManager and WebStorage for fine-grained control of privacy data.

Constructs a new WebView with layout parameters and a default style.

Parameters

context	a Context object used to access application assets
attrs	an AttributeSet passed to our parent
defStyleAttr	an attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.
privateBrowsing	whether this WebView will be initialized in private mode

Public Methods

public void addJavascriptInterface (Object object, String name)

Added in API level 1

Injects the supplied Java object into this WebView. The object is injected into the JavaScript context of the main frame, using the supplied name. This allows the Java object's methods to be accessed from JavaScript. For applications targeted to API level JELLY_BEAN_MR1 and above, only public methods that are annotated with JavascriptInterface can be accessed from JavaScript. For applications targeted to API level JELLY_BEAN or below, all public methods (including the inherited ones) can be accessed, see the important security note below for implications.

Note that injected objects will not appear in JavaScript until the page is next (re)loaded. For example:

 class JsObject {
    @JavascriptInterface
    public String toString() { return "injectedObject"; }
 }
 webView.addJavascriptInterface(new JsObject(), "injectedObject");
 webView.loadData("", "text/html", null);
 webView.loadUrl("javascript:alert(injectedObject.toString())");

IMPORTANT:

This method can be used to allow JavaScript to control the host application. This is a powerful feature, but also presents a security risk for apps targeting JELLY_BEAN or earlier. Apps that target a version later than JELLY_BEAN are still vulnerable if the app runs on a device running Android earlier than 4.2. The most secure way to use this method is to target JELLY_BEAN_MR1 and to ensure the method is called only when running on Android 4.2 or later. With these older versions, JavaScript could use reflection to access an injected object's public fields. Use of this method in a WebView containing untrusted content could allow an attacker to manipulate the host application in unintended ways, executing Java code with the permissions of the host application. Use extreme care when using this method in a WebView which could contain untrusted content.
JavaScript interacts with Java object on a private, background thread of this WebView. Care is therefore required to maintain thread safety.
The Java object's fields are not accessible.
For applications targeted to API level LOLLIPOP and above, methods of injected Java objects are enumerable from JavaScript.

Parameters

object	the Java object to inject into this WebView's JavaScript context. Null values are ignored.
name	the name used to expose the object in JavaScript

public boolean canGoBack ()

Added in API level 1

Gets whether this WebView has a back history item.

Returns

true iff this WebView has a back history item

public boolean canGoBackOrForward (int steps)

Added in API level 1

Gets whether the page can go back or forward the given number of steps.

Parameters

steps	the negative or positive number of steps to move the history

public boolean canGoForward ()

Added in API level 1

Gets whether this WebView has a forward history item.

Returns

true iff this Webview has a forward history item

public boolean canZoomIn ()

Added in API level 11

This method was deprecated in API level 17.
This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer onScaleChanged(WebView, float, float).

Gets whether this WebView can be zoomed in.

Returns

true if this WebView can be zoomed in

public boolean canZoomOut ()

Added in API level 11

This method was deprecated in API level 17.
This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer onScaleChanged(WebView, float, float).

Gets whether this WebView can be zoomed out.

Returns

true if this WebView can be zoomed out

public Picture capturePicture ()

Added in API level 1

This method was deprecated in API level 19.
Use onDraw(Canvas) to obtain a bitmap snapshot of the WebView, or saveWebArchive(String) to save the content to a file.

Gets a new picture that captures the current contents of this WebView. The picture is of the entire document being displayed, and is not limited to the area currently displayed by this WebView. Also, the picture is a static copy and is unaffected by later changes to the content being displayed.

Note that due to internal changes, for API levels between HONEYCOMB and ICE_CREAM_SANDWICH inclusive, the picture does not include fixed position elements or scrollable divs.

Note that from JELLY_BEAN_MR1 the returned picture should only be drawn into bitmap-backed Canvas - using any other type of Canvas will involve additional conversion at a cost in memory and performance. Also the createFromStream(InputStream) and writeToStream(OutputStream) methods are not supported on the returned object.

Returns

a picture that captures the current contents of this WebView

public void clearCache (boolean includeDiskFiles)

Added in API level 1

Clears the resource cache. Note that the cache is per-application, so this will clear the cache for all WebViews used.

Parameters

includeDiskFiles	if false, only the RAM cache is cleared

public static void clearClientCertPreferences (Runnable onCleared)

Added in API level 21

Clears the client certificate preferences stored in response to proceeding/cancelling client cert requests. Note that Webview automatically clears these preferences when it receives a ACTION_STORAGE_CHANGED intent. The preferences are shared by all the webviews that are created by the embedder application.

Parameters

onCleared	A runnable to be invoked when client certs are cleared. The embedder can pass null if not interested in the callback. The runnable will be called in UI thread.

public void clearFormData ()

Added in API level 1

Removes the autocomplete popup from the currently focused form field, if present. Note this only affects the display of the autocomplete popup, it does not remove any saved form data from this WebView's store. To do that, use clearFormData().

public void clearHistory ()

Added in API level 1

Tells this WebView to clear its internal back/forward list.

public void clearMatches ()

Added in API level 3

Clears the highlighting surrounding text matches created by findAllAsync(String).

public void clearSslPreferences ()

Added in API level 1

Clears the SSL preferences table stored in response to proceeding with SSL certificate errors.

public void clearView ()

Added in API level 1

This method was deprecated in API level 18.
Use WebView.loadUrl("about:blank") to reliably reset the view state and release page resources (including any running JavaScript).

Clears this WebView so that onDraw() will draw nothing but white background, and onMeasure() will return 0 if MeasureSpec is not MeasureSpec.EXACTLY.

public void computeScroll ()

Added in API level 1

Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary. This will typically be done if the child is animating a scroll using a Scroller object.

public WebBackForwardList copyBackForwardList ()

Added in API level 1

Gets the WebBackForwardList for this WebView. This contains the back/forward list for use in querying each item in the history stack. This is a copy of the private WebBackForwardList so it contains only a snapshot of the current state. Multiple calls to this method may return different objects. The object returned from this method will not be updated to reflect any new state.

public PrintDocumentAdapter createPrintDocumentAdapter ()

Added in API level 19

This method was deprecated in API level 21.
Use createPrintDocumentAdapter(String) which requires user to provide a print document name.

public PrintDocumentAdapter createPrintDocumentAdapter (String documentName)

Added in API level 21

Creates a PrintDocumentAdapter that provides the content of this Webview for printing. The adapter works by converting the Webview contents to a PDF stream. The Webview cannot be drawn during the conversion process - any such draws are undefined. It is recommended to use a dedicated off screen Webview for the printing. If necessary, an application may temporarily hide a visible WebView by using a custom PrintDocumentAdapter instance wrapped around the object returned and observing the onStart and onFinish methods. See PrintDocumentAdapter for more information.

Parameters

documentName	The user-facing name of the printed document. See `PrintDocumentInfo`

public WebMessagePort[] createWebMessageChannel ()

Added in API level 23

Creates a message channel to communicate with JS and returns the message ports that represent the endpoints of this message channel. The HTML5 message channel functionality is described here The returned message channels are entangled and already in started state.

Returns

the two message ports that form the message channel.

public void destroy ()

Added in API level 1

Destroys the internal state of this WebView. This method should be called after this WebView has been removed from the view system. No other methods may be called on this WebView after destroy.

public boolean dispatchKeyEvent (KeyEvent event)

Added in API level 1

Dispatch a key event to the next view on the focus path. This path runs from the top of the view tree down to the currently focused view. If this view has focus, it will dispatch to itself. Otherwise it will dispatch the next node down the focus path. This method also fires any key listeners.

Parameters

event	The key event to be dispatched.

Returns

True if the event was handled, false otherwise.

public void documentHasImages (Message response)

Added in API level 1

Queries the document to see if it contains any image references. The message object will be dispatched with arg1 being set to 1 if images were found and 0 if the document does not reference any images.

Parameters

response	the message that will be dispatched with the result

public static void enableSlowWholeDocumentDraw ()

Added in API level 21

For apps targeting the L release, WebView has a new default behavior that reduces memory footprint and increases performance by intelligently choosing the portion of the HTML document that needs to be drawn. These optimizations are transparent to the developers. However, under certain circumstances, an App developer may want to disable them:

When an app uses onDraw(Canvas) to do own drawing and accesses portions of the page that is way outside the visible portion of the page.
When an app uses capturePicture() to capture a very large HTML document. Note that capturePicture is a deprecated API.

Enabling drawing the entire HTML document has a significant performance cost. This method should be called before any WebViews are created.

public void evaluateJavascript (String script, ValueCallback<String> resultCallback)

Added in API level 19

Asynchronously evaluates JavaScript in the context of the currently displayed page. If non-null, |resultCallback| will be invoked with any result returned from that execution. This method must be called on the UI thread and the callback will be made on the UI thread.

Parameters

script	the JavaScript to execute.
resultCallback	A callback to be invoked when the script execution completes with the result of the execution (if any). May be null if no notificaion of the result is required.

public static String findAddress (String addr)

Added in API level 1

Gets the first substring consisting of the address of a physical location. Currently, only addresses in the United States are detected, and consist of:

a house number
a street name
a street type (Road, Circle, etc), either spelled out or abbreviated
a city name
a state or territory, either spelled out or two-letter abbr
an optional 5 digit or 9 digit zip code

All names must be correctly capitalized, and the zip code, if present, must be valid for the state. The street type must be a standard USPS spelling or abbreviation. The state or territory must also be spelled or abbreviated using USPS standards. The house number may not exceed five digits.

Parameters

addr	the string to search for addresses

Returns

the address, or if no address is found, null

public int findAll (String find)

Added in API level 3

This method was deprecated in API level 16.
findAllAsync(String) is preferred.

Finds all instances of find on the page and highlights them. Notifies any registered WebView.FindListener.

Parameters

find	the string to find

Returns

the number of occurances of the String "find" that were found

public void findAllAsync (String find)

Added in API level 16

Finds all instances of find on the page and highlights them, asynchronously. Notifies any registered WebView.FindListener. Successive calls to this will cancel any pending searches.

Parameters

find	the string to find.

public void findNext (boolean forward)

Added in API level 3

Highlights and scrolls to the next match found by findAllAsync(String), wrapping around page boundaries as necessary. Notifies any registered WebView.FindListener. If findAllAsync(String) has not been called yet, or if clearMatches() has been called since the last find operation, this function does nothing.

Parameters

forward	the direction to search

public void flingScroll (int vx, int vy)

Added in API level 1

public void freeMemory ()

Added in API level 7

This method was deprecated in API level 19.
Memory caches are automatically dropped when no longer needed, and in response to system memory pressure.

Informs this WebView that memory is low so that it can free any available memory.

public CharSequence getAccessibilityClassName ()

Added in API level 23

Return the class name of this object to be used for accessibility purposes. Subclasses should only override this if they are implementing something that should be seen as a completely new class of view when used by accessibility, unrelated to the class it is deriving from. This is used to fill in AccessibilityNodeInfo.setClassName.

public AccessibilityNodeProvider getAccessibilityNodeProvider ()

Added in API level 16

Gets the provider for managing a virtual view hierarchy rooted at this View and reported to AccessibilityServices that explore the window content.

If this method returns an instance, this instance is responsible for managing AccessibilityNodeInfos describing the virtual sub-tree rooted at this View including the one representing the View itself. Similarly the returned instance is responsible for performing accessibility actions on any virtual view or the root view itself.

If an View.AccessibilityDelegate has been specified via calling setAccessibilityDelegate(AccessibilityDelegate) its getAccessibilityNodeProvider(View) is responsible for handling this call.

Returns

The provider.

public SslCertificate getCertificate ()

Added in API level 1

Gets the SSL certificate for the main top-level page or null if there is no certificate (the site is not secure).

Returns

the SSL certificate for the main top-level page

public int getContentHeight ()

Added in API level 1

Gets the height of the HTML content.

Returns

the height of the HTML content

public Bitmap getFavicon ()

Added in API level 1

Gets the favicon for the current page. This is the favicon of the current page until WebViewClient.onReceivedIcon is called.

Returns

the favicon for the current page

public WebView.HitTestResult getHitTestResult ()

Added in API level 1

Gets a HitTestResult based on the current cursor node. If a HTML::a tag is found and the anchor has a non-JavaScript URL, the HitTestResult type is set to SRC_ANCHOR_TYPE and the URL is set in the "extra" field. If the anchor does not have a URL or if it is a JavaScript URL, the type will be UNKNOWN_TYPE and the URL has to be retrieved through requestFocusNodeHref(Message) asynchronously. If a HTML::img tag is found, the HitTestResult type is set to IMAGE_TYPE and the URL is set in the "extra" field. A type of SRC_IMAGE_ANCHOR_TYPE indicates an anchor with a URL that has an image as a child node. If a phone number is found, the HitTestResult type is set to PHONE_TYPE and the phone number is set in the "extra" field of HitTestResult. If a map address is found, the HitTestResult type is set to GEO_TYPE and the address is set in the "extra" field of HitTestResult. If an email address is found, the HitTestResult type is set to EMAIL_TYPE and the email is set in the "extra" field of HitTestResult. Otherwise, HitTestResult type is set to UNKNOWN_TYPE.

public String[] getHttpAuthUsernamePassword (String host, String realm)

Added in API level 1

Retrieves HTTP authentication credentials for a given host and realm. This method is intended to be used with onReceivedHttpAuthRequest(WebView, HttpAuthHandler, String, String).

Parameters

host	the host to which the credentials apply
realm	the realm to which the credentials apply

Returns

the credentials as a String array, if found. The first element is the username and the second element is the password. Null if no credentials are found.

public String getOriginalUrl ()

Added in API level 3

Gets the original URL for the current page. This is not always the same as the URL passed to WebViewClient.onPageStarted because although the load for that URL has begun, the current page may not have changed. Also, there may have been redirects resulting in a different URL to that originally requested.

Returns

the URL that was originally requested for the current page

public int getProgress ()

Added in API level 1

Gets the progress for the current page.

Returns

the progress for the current page between 0 and 100

public float getScale ()

Added in API level 1

This method was deprecated in API level 17.
This method is prone to inaccuracy due to race conditions between the web rendering and UI threads; prefer onScaleChanged(WebView, float, float).

Gets the current scale of this WebView.

Returns

the current scale

public WebSettings getSettings ()

Added in API level 1

Gets the WebSettings object used to control the settings for this WebView.

Returns

a WebSettings object that can be used to control this WebView's settings

public String getTitle ()

Added in API level 1

Gets the title for the current page. This is the title of the current page until WebViewClient.onReceivedTitle is called.

Returns

the title for the current page

public String getUrl ()

Added in API level 1

Gets the URL for the current page. This is not always the same as the URL passed to WebViewClient.onPageStarted because although the load for that URL has begun, the current page may not have changed.

Returns

the URL for the current page

public void goBack ()

Added in API level 1

Goes back in the history of this WebView.

public void goBackOrForward (int steps)

Added in API level 1

Goes to the history item that is the number of steps away from the current item. Steps is negative if backward and positive if forward.

Parameters

steps	the number of steps to take back or forward in the back forward list

public void goForward ()

Added in API level 1

Goes forward in the history of this WebView.

public void invokeZoomPicker ()

Added in API level 1

Invokes the graphical zoom picker widget for this WebView. This will result in the zoom widget appearing on the screen to control the zoom level of this WebView.

public boolean isPrivateBrowsingEnabled ()

Added in API level 11

Gets whether private browsing is enabled in this WebView.

public void loadData (String data, String mimeType, String encoding)

Added in API level 1

Loads the given data into this WebView using a 'data' scheme URL.

Note that JavaScript's same origin policy means that script running in a page loaded using this method will be unable to access content loaded using any scheme other than 'data', including 'http(s)'. To avoid this restriction, use loadDataWithBaseURL() with an appropriate base URL.

The encoding parameter specifies whether the data is base64 or URL encoded. If the data is base64 encoded, the value of the encoding parameter must be 'base64'. For all other values of the parameter, including null, it is assumed that the data uses ASCII encoding for octets inside the range of safe URL characters and use the standard %xx hex encoding of URLs for octets outside that range. For example, '#', '%', '\', '?' should be replaced by %23, %25, %27, %3f respectively.

The 'data' scheme URL formed by this method uses the default US-ASCII charset. If you need need to set a different charset, you should form a 'data' scheme URL which explicitly specifies a charset parameter in the mediatype portion of the URL and call loadUrl(String) instead. Note that the charset obtained from the mediatype portion of a data URL always overrides that specified in the HTML or XML document itself.

Parameters

data	a String of data in the given encoding
mimeType	the MIME type of the data, e.g. 'text/html'
encoding	the encoding of the data

public void loadDataWithBaseURL (String baseUrl, String data, String mimeType, String encoding, String historyUrl)

Added in API level 1

Loads the given data into this WebView, using baseUrl as the base URL for the content. The base URL is used both to resolve relative URLs and when applying JavaScript's same origin policy. The historyUrl is used for the history entry.

Note that content specified in this way can access local device files (via 'file' scheme URLs) only if baseUrl specifies a scheme other than 'http', 'https', 'ftp', 'ftps', 'about' or 'javascript'.

If the base URL uses the data scheme, this method is equivalent to calling loadData() and the historyUrl is ignored, and the data will be treated as part of a data: URL. If the base URL uses any other scheme, then the data will be loaded into the WebView as a plain string (i.e. not part of a data URL) and any URL-encoded entities in the string will not be decoded.

Parameters

baseUrl	the URL to use as the page's base URL. If null defaults to 'about:blank'.
data	a String of data in the given encoding
mimeType	the MIMEType of the data, e.g. 'text/html'. If null, defaults to 'text/html'.
encoding	the encoding of the data
historyUrl	the URL to use as the history entry. If null defaults to 'about:blank'. If non-null, this must be a valid URL.

public void loadUrl (String url)

Added in API level 1

Loads the given URL.

Parameters

url	the URL of the resource to load

public void loadUrl (String url, Map<String, String> additionalHttpHeaders)

Added in API level 8

Loads the given URL with the specified additional HTTP headers.

Parameters

url	the URL of the resource to load
additionalHttpHeaders	the additional headers to be used in the HTTP request for this URL, specified as a map from name to value. Note that if this map contains any of the headers that are set by default by this WebView, such as those controlling caching, accept types or the User-Agent, their values may be overriden by this WebView's defaults.

public void onChildViewAdded (View parent, View child)

Added in API level 1

This method was deprecated in API level 8.
WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.

Called when a new child is added to a parent view.

Parameters

parent	the view in which a child was added
child	the new child view added in the hierarchy

public void onChildViewRemoved (View p, View child)

Added in API level 1

This method was deprecated in API level 8.
WebView no longer needs to implement ViewGroup.OnHierarchyChangeListener. This method does nothing now.

Called when a child is removed from a parent view.

Parameters

p	the view from which the child was removed
child	the child removed from the hierarchy

public InputConnection onCreateInputConnection (EditorInfo outAttrs)

Added in API level 3

Create a new InputConnection for an InputMethod to interact with the view. The default implementation returns null, since it doesn't support input methods. You can override this to implement such support. This is only needed for views that take focus and text input.

When implementing this, you probably also want to implement onCheckIsTextEditor() to indicate you will return a non-null InputConnection.

Also, take good care to fill in the EditorInfo object correctly and in its entirety, so that the connected IME can rely on its values. For example, initialSelStart and initialSelEnd members must be filled in with the correct cursor position for IMEs to work correctly with your application.

Parameters

outAttrs	Fill in with attribute information about the connection.

public void onFinishTemporaryDetach ()

Added in API level 3

Called after onStartTemporaryDetach() when the container is done changing the view.

public boolean onGenericMotionEvent (MotionEvent event)

Added in API level 12

Implement this method to handle generic motion events.

Generic motion events describe joystick movements, mouse hovers, track pad touches, scroll wheel movements and other input events. The source of the motion event specifies the class of input that was received. Implementations of this method must examine the bits in the source before processing the event. The following code example shows how this is done.

Generic motion events with source class SOURCE_CLASS_POINTER are delivered to the view under the pointer. All other generic motion events are delivered to the focused view.

 public boolean onGenericMotionEvent(MotionEvent event) {
     if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) {
         if (event.getAction() == MotionEvent.ACTION_MOVE) {
             // process the joystick movement...
             return true;
         }
     }
     if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) {
         switch (event.getAction()) {
             case MotionEvent.ACTION_HOVER_MOVE:
                 // process the mouse hover movement...
                 return true;
             case MotionEvent.ACTION_SCROLL:
                 // process the scroll wheel movement...
                 return true;
         }
     }
     return super.onGenericMotionEvent(event);
 }

Parameters

event	The generic motion event being processed.

Returns

True if the event was handled, false otherwise.

public void onGlobalFocusChanged (View oldFocus, View newFocus)

Added in API level 1

This method was deprecated in API level 3.
WebView should not have implemented ViewTreeObserver.OnGlobalFocusChangeListener. This method does nothing now.

Callback method to be invoked when the focus changes in the view tree. When the view tree transitions from touch mode to non-touch mode, oldFocus is null. When the view tree transitions from non-touch mode to touch mode, newFocus is null. When focus changes in non-touch mode (without transition from or to touch mode) either oldFocus or newFocus can be null.

Parameters

oldFocus	The previously focused view, if any.
newFocus	The newly focused View, if any.

public boolean onHoverEvent (MotionEvent event)

Added in API level 14

Implement this method to handle hover events.

This method is called whenever a pointer is hovering into, over, or out of the bounds of a view and the view is not currently being touched. Hover events are represented as pointer events with action ACTION_HOVER_ENTER, ACTION_HOVER_MOVE, or ACTION_HOVER_EXIT.

The view receives a hover event with action ACTION_HOVER_ENTER when the pointer enters the bounds of the view.
The view receives a hover event with action ACTION_HOVER_MOVE when the pointer has already entered the bounds of the view and has moved.
The view receives a hover event with action ACTION_HOVER_EXIT when the pointer has exited the bounds of the view or when the pointer is about to go down due to a button click, tap, or similar user action that causes the view to be touched.

The view should implement this method to return true to indicate that it is handling the hover event, such as by changing its drawable state.

The default implementation calls setHovered(boolean) to update the hovered state of the view when a hover enter or hover exit event is received, if the view is enabled and is clickable. The default implementation also sends hover accessibility events.

Parameters

event	The motion event that describes the hover.

Returns

True if the view handled the hover event.

public boolean onKeyDown (int keyCode, KeyEvent event)

Added in API level 1

Default implementation of KeyEvent.Callback.onKeyDown(): perform press of the view when KEYCODE_DPAD_CENTER or KEYCODE_ENTER is released, if the view is enabled and clickable.

Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public boolean onKeyMultiple (int keyCode, int repeatCount, KeyEvent event)

Added in API level 1

Default implementation of KeyEvent.Callback.onKeyMultiple(): always returns false (doesn't handle the event).

Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
repeatCount	The number of times the action was made.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public boolean onKeyUp (int keyCode, KeyEvent event)

Added in API level 1

Default implementation of KeyEvent.Callback.onKeyUp(): perform clicking of the view when KEYCODE_DPAD_CENTER or KEYCODE_ENTER is released.

Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

Parameters

keyCode	A key code that represents the button pressed, from `KeyEvent`.
event	The KeyEvent object that defines the button action.

Returns

If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

public void onPause ()

Added in API level 11

Pauses any extra processing associated with this WebView and its associated DOM, plugins, JavaScript etc. For example, if this WebView is taken offscreen, this could be called to reduce unnecessary CPU or network traffic. When this WebView is again "active", call onResume(). Note that this differs from pauseTimers(), which affects all WebViews.

public void onProvideVirtualStructure (ViewStructure structure)

Added in API level 23

Called when assist structure is being retrieved from a view as part of Activity.onProvideAssistData to generate additional virtual structure under this view. The defaullt implementation uses getAccessibilityNodeProvider() to try to generate this from the view's virtual accessibility nodes, if any. You can override this for a more optimal implementation providing this data.

public void onResume ()

Added in API level 11

Resumes a WebView after a previous call to onPause().

public void onStartTemporaryDetach ()

Added in API level 3

This is called when a container is going to temporarily detach a child, with ViewGroup.detachViewFromParent. It will either be followed by onFinishTemporaryDetach() or onDetachedFromWindow() when the container is done.

public boolean onTouchEvent (MotionEvent event)

Added in API level 1

Implement this method to handle touch screen motion events.

If this method is used to detect click actions, it is recommended that the actions be performed by implementing and calling performClick(). This will ensure consistent system behavior, including:

obeying click sound preferences
dispatching OnClickListener calls
handling ACTION_CLICK when accessibility features are enabled

Parameters

event	The motion event.

Returns

True if the event was handled, false otherwise.

public boolean onTrackballEvent (MotionEvent event)

Added in API level 1

Implement this method to handle trackball motion events. The relative movement of the trackball since the last event can be retrieve with MotionEvent.getX() and MotionEvent.getY(). These are normalized so that a movement of 1 corresponds to the user pressing one DPAD key (so they will often be fractional values, representing the more fine-grained movement information available from a trackball).

Parameters

event	The motion event.

Returns

True if the event was handled, false otherwise.

public void onWindowFocusChanged (boolean hasWindowFocus)

Added in API level 1

Called when the window containing this view gains or loses focus. Note that this is separate from view focus: to receive key events, both your view and its window must have focus. If a window is displayed on top of yours that takes input focus, then your own window will lose focus but the view focus will remain unchanged.

Parameters

hasWindowFocus	True if the window containing this view now has focus, false otherwise.

public boolean overlayHorizontalScrollbar ()

Added in API level 1

This method was deprecated in API level 23.
This method is now obsolete.

Gets whether horizontal scrollbar has overlay style.

Returns

true

public boolean overlayVerticalScrollbar ()

Added in API level 1

This method was deprecated in API level 23.
This method is now obsolete.

Gets whether vertical scrollbar has overlay style.

Returns

false

public boolean pageDown (boolean bottom)

Added in API level 1

Scrolls the contents of this WebView down by half the page size.

Parameters

bottom	true to jump to bottom of page

Returns

true if the page was scrolled

public boolean pageUp (boolean top)

Added in API level 1

Scrolls the contents of this WebView up by half the view size.

Parameters

top	true to jump to the top of the page

Returns

true if the page was scrolled

public void pauseTimers ()

Added in API level 1

Pauses all layout, parsing, and JavaScript timers for all WebViews. This is a global requests, not restricted to just this WebView. This can be useful if the application has been paused.

public boolean performLongClick ()

Added in API level 1

Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the OnLongClickListener did not consume the event.

Returns

True if one of the above receivers consumed the event, false otherwise.

public void postUrl (String url, byte[] postData)

Added in API level 5

Loads the URL with postData using "POST" method into this WebView. If url is not a network URL, it will be loaded with loadUrl(String) instead, ignoring the postData param.

Parameters

url	the URL of the resource to load
postData	the data will be passed to "POST" request, which must be be "application/x-www-form-urlencoded" encoded.

public void postVisualStateCallback (long requestId, WebView.VisualStateCallback callback)

Added in API level 23

Posts a WebView.VisualStateCallback, which will be called when the current state of the WebView is ready to be drawn.

Because updates to the the DOM are processed asynchronously, updates to the DOM may not immediately be reflected visually by subsequent onDraw(Canvas) invocations. The WebView.VisualStateCallback provides a mechanism to notify the caller when the contents of the DOM at the current time are ready to be drawn the next time the WebView draws.

The next draw after the callback completes is guaranteed to reflect all the updates to the DOM up to the the point at which the WebView.VisualStateCallback was posted, but it may also contain updates applied after the callback was posted.

The state of the DOM covered by this API includes the following:

primitive HTML elements (div, img, span, etc..)
images
CSS animations
WebGL
canvas

It does not include the state of:

the video tag

To guarantee that the WebView will successfully render the first frame after the onComplete(long) method has been called a set of conditions must be met:

If the WebView's visibility is set to VISIBLE then the WebView must be attached to the view hierarchy.
If the WebView's visibility is set to INVISIBLE then the WebView must be attached to the view hierarchy and must be made VISIBLE from the onComplete(long) method.
If the WebView's visibility is set to GONE then the WebView must be attached to the view hierarchy and its LayoutParams's width and height need to be set to fixed values and must be made VISIBLE from the onComplete(long) method.

When using this API it is also recommended to enable pre-rasterization if the WebView is offscreen to avoid flickering. See setOffscreenPreRaster(boolean) for more details and do consider its caveats.

Parameters

requestId	An id that will be returned in the callback to allow callers to match requests with callbacks.
callback	The callback to be invoked.

public void postWebMessage (WebMessage message, Uri targetOrigin)

Added in API level 23

Post a message to main frame. The embedded application can restrict the messages to a certain target origin. See HTML5 spec for how target origin can be used.

Parameters

message	the WebMessage
targetOrigin	the target origin. This is the origin of the page that is intended to receive the message. For best security practices, the user should not specify a wildcard (*) when specifying the origin.

public void reload ()

Added in API level 1

Reloads the current URL.

public void removeJavascriptInterface (String name)

Added in API level 11

Removes a previously injected Java object from this WebView. Note that the removal will not be reflected in JavaScript until the page is next (re)loaded. See addJavascriptInterface(Object, String).

Parameters

name	the name used to expose the object in JavaScript

public boolean requestChildRectangleOnScreen (View child, Rect rect, boolean immediate)

Added in API level 1

Called when a child of this group wants a particular rectangle to be positioned onto the screen. ViewGroups overriding this can trust that:

child will be a direct child of this group
rectangle will be in the child's coordinates

ViewGroups overriding this should uphold the contract:

nothing will change if the rectangle is already visible
the view port will be scrolled only just enough to make the rectangle visible

Parameters

child	The direct child making the request.
rect	The rectangle in the child's coordinates the child wishes to be on the screen.
immediate	True to forbid animated or delayed scrolling, false otherwise

Returns

Whether the group scrolled to handle the operation

public boolean requestFocus (int direction, Rect previouslyFocusedRect)

Added in API level 1

Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. The rectangle can help give larger views a finer grained hint about where focus is coming from, and therefore, where to show selection, or forward focus change internally. A view will not actually take focus if it is not focusable (isFocusable() returns false), or if it is focusable and it is not focusable in touch mode (isFocusableInTouchMode()) while the device is in touch mode. A View will not take focus if it is not visible. A View will not take focus if one of its parents has getDescendantFocusability() equal to FOCUS_BLOCK_DESCENDANTS. See also focusSearch(int), which is what you call to say that you have focus, and you want your parent to look for the next one. You may wish to override this method if your custom View has an internal View that it wishes to forward the request to. Looks for a view to give focus to respecting the setting specified by getDescendantFocusability(). Uses onRequestFocusInDescendants(int, android.graphics.Rect) to find focus within the children of this group when appropriate.

Parameters

direction	One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
previouslyFocusedRect	The rectangle (in this View's coordinate system) to give a finer grained hint about where focus is coming from. May be null if there is no hint.

Returns

Whether this view or one of its descendants actually took focus.

public void requestFocusNodeHref (Message hrefMsg)

Added in API level 1

Requests the anchor or image element URL at the last tapped point. If hrefMsg is null, this method returns immediately and does not dispatch hrefMsg to its target. If the tapped point hits an image, an anchor, or an image in an anchor, the message associates strings in named keys in its data. The value paired with the key may be an empty string.

Parameters

hrefMsg	the message to be dispatched with the result of the request. The message data contains three keys. "url" returns the anchor's href attribute. "title" returns the anchor's text. "src" returns the image's src attribute.

public void requestImageRef (Message msg)

Added in API level 1

Requests the URL of the image last touched by the user. msg will be sent to its target with a String representing the URL as its object.

Parameters

msg	the message to be dispatched with the result of the request as the data member with "url" as key. The result can be null.

public WebBackForwardList restoreState (Bundle inState)

Added in API level 1

Restores the state of this WebView from the given Bundle. This method is intended for use in onRestoreInstanceState(Bundle) and should be called to restore the state of this WebView. If it is called after this WebView has had a chance to build state (load pages, create a back/forward list, etc.) there may be undesirable side-effects. Please note that this method no longer restores the display data for this WebView.

Parameters

inState	the incoming Bundle of state

Returns

the restored back/forward list or null if restoreState failed

public void resumeTimers ()

Added in API level 1

Resumes all layout, parsing, and JavaScript timers for all WebViews. This will resume dispatching all timers.

public void savePassword (String host, String username, String password)

Added in API level 1

This method was deprecated in API level 18.
Saving passwords in WebView will not be supported in future versions.

Sets a username and password pair for the specified host. This data is used by the Webview to autocomplete username and password fields in web forms. Note that this is unrelated to the credentials used for HTTP authentication.

Parameters

host	the host that required the credentials
username	the username for the given host
password	the password for the given host

public WebBackForwardList saveState (Bundle outState)

Added in API level 1

Saves the state of this WebView used in onSaveInstanceState(Bundle). Please note that this method no longer stores the display data for this WebView. The previous behavior could potentially leak files if restoreState(Bundle) was never called.

Parameters

outState	the Bundle to store this WebView's state

Returns

the same copy of the back/forward list used to save the state. If saveState fails, the returned list will be null.

public void saveWebArchive (String filename)

Added in API level 11

Saves the current view as a web archive.

Parameters

filename	the filename where the archive should be placed

public void saveWebArchive (String basename, boolean autoname, ValueCallback<String> callback)

Added in API level 11

Saves the current view as a web archive.

Parameters

basename	the filename where the archive should be placed
autoname	if false, takes basename to be a file. If true, basename is assumed to be a directory in which a filename will be chosen according to the URL of the current page.
callback	called after the web archive has been saved. The parameter for onReceiveValue will either be the filename under which the file was saved, or null if saving the file failed.

public void setBackgroundColor (int color)

Added in API level 1

Sets the background color for this view.

Parameters

color	the color of the background

public void setCertificate (SslCertificate certificate)

Added in API level 1

This method was deprecated in API level 17.
Calling this function has no useful effect, and will be ignored in future releases.

Sets the SSL certificate for the main top-level page.

public void setDownloadListener (DownloadListener listener)

Added in API level 1

Registers the interface to be used when content can not be handled by the rendering engine, and should be downloaded instead. This will replace the current handler.

Parameters

listener	an implementation of DownloadListener

public void setFindListener (WebView.FindListener listener)

Added in API level 16

Registers the listener to be notified as find-on-page operations progress. This will replace the current listener.

Parameters

listener	an implementation of `WebView.FindListener`

public void setHorizontalScrollbarOverlay (boolean overlay)

Added in API level 1

This method was deprecated in API level 23.
This method has no effect.

Specifies whether the horizontal scrollbar has overlay style.

Parameters

overlay	true if horizontal scrollbar should have overlay style

public void setHttpAuthUsernamePassword (String host, String realm, String username, String password)

Added in API level 1

Stores HTTP authentication credentials for a given host and realm. This method is intended to be used with onReceivedHttpAuthRequest(WebView, HttpAuthHandler, String, String).

Parameters

host	the host to which the credentials apply
realm	the realm to which the credentials apply
username	the username
password	the password

public void setInitialScale (int scaleInPercent)

Added in API level 1

Sets the initial scale for this WebView. 0 means default. The behavior for the default scale depends on the state of getUseWideViewPort() and getLoadWithOverviewMode(). If the content fits into the WebView control by width, then the zoom is set to 100%. For wide content, the behavor depends on the state of getLoadWithOverviewMode(). If its value is true, the content will be zoomed out to be fit by width into the WebView control, otherwise not. If initial scale is greater than 0, WebView starts with this value as initial scale. Please note that unlike the scale properties in the viewport meta tag, this method doesn't take the screen density into account.

Parameters

scaleInPercent	the initial scale in percent

public void setLayerType (int layerType, Paint paint)

Added in API level 11

Specifies the type of layer backing this view. The layer can be LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE.

A layer is associated with an optional Paint instance that controls how the layer is composed on screen. The following properties of the paint are taken into account when composing the layer:

If this view has an alpha value set to < 1.0 by calling setAlpha(float), the alpha value of the layer's paint is superseded by this view's alpha value.

Refer to the documentation of LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE and LAYER_TYPE_HARDWARE for more information on when and how to use layers.

Parameters

layerType	The type of layer to use with this view, must be one of `LAYER_TYPE_NONE`, `LAYER_TYPE_SOFTWARE` or `LAYER_TYPE_HARDWARE`
paint	The paint used to compose the layer. This argument is optional and can be null. It is ignored when the layer type is `LAYER_TYPE_NONE`

public void setLayoutParams (ViewGroup.LayoutParams params)

Added in API level 1

Set the layout parameters associated with this view. These supply parameters to the parent of this view specifying how it should be arranged. There are many subclasses of ViewGroup.LayoutParams, and these correspond to the different subclasses of ViewGroup that are responsible for arranging their children.

Parameters

params	The layout parameters for this view, cannot be null

public void setMapTrackballToArrowKeys (boolean setMap)

Added in API level 1

This method was deprecated in API level 17.
Only the default case, true, will be supported in a future version.

public void setNetworkAvailable (boolean networkUp)

Added in API level 3

Informs WebView of the network state. This is used to set the JavaScript property window.navigator.isOnline and generates the online/offline event as specified in HTML5, sec. 5.7.7

Parameters

networkUp	a boolean indicating if network is available

public void setOverScrollMode (int mode)

Added in API level 9

Set the over-scroll mode for this view. Valid over-scroll modes are OVER_SCROLL_ALWAYS (default), OVER_SCROLL_IF_CONTENT_SCROLLS (allow over-scrolling only if the view content is larger than the container), or OVER_SCROLL_NEVER. Setting the over-scroll mode of a view will have an effect only if the view is capable of scrolling.

Parameters

mode	The new over-scroll mode for this view.

public void setPictureListener (WebView.PictureListener listener)

Added in API level 1

This method was deprecated in API level 12.
This method is now obsolete.

Sets the Picture listener. This is an interface used to receive notifications of a new Picture.

Parameters

listener	an implementation of WebView.PictureListener

public void setScrollBarStyle (int style)

Added in API level 1

Specify the style of the scrollbars. The scrollbars can be overlaid or inset. When inset, they add to the padding of the view. And the scrollbars can be drawn inside the padding area or on the edge of the view. For example, if a view has a background drawable and you want to draw the scrollbars inside the padding specified by the drawable, you can use SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to appear at the edge of the view, ignoring the padding, then you can use SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.

Parameters

style	the style of the scrollbars. Should be one of SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.

public void setVerticalScrollbarOverlay (boolean overlay)

Added in API level 1

This method was deprecated in API level 23.
This method has no effect.

Specifies whether the vertical scrollbar has overlay style.

Parameters

overlay	true if vertical scrollbar should have overlay style

public void setWebChromeClient (WebChromeClient client)

Added in API level 1

Sets the chrome handler. This is an implementation of WebChromeClient for use in handling JavaScript dialogs, favicons, titles, and the progress. This will replace the current handler.

Parameters

client	an implementation of WebChromeClient

public static void setWebContentsDebuggingEnabled (boolean enabled)

Added in API level 19

Enables debugging of web contents (HTML / CSS / JavaScript) loaded into any WebViews of this application. This flag can be enabled in order to facilitate debugging of web layouts and JavaScript code running inside WebViews. Please refer to WebView documentation for the debugging guide. The default is false.

Parameters

enabled	whether to enable web contents debugging

public void setWebViewClient (WebViewClient client)

Added in API level 1

Sets the WebViewClient that will receive various notifications and requests. This will replace the current handler.

Parameters

client	an implementation of WebViewClient

public boolean shouldDelayChildPressedState ()

Added in API level 14

Return true if the pressed state should be delayed for children or descendants of this ViewGroup. Generally, this should be done for containers that can scroll, such as a List. This prevents the pressed state from appearing when the user is actually trying to scroll the content. The default implementation returns true for compatibility reasons. Subclasses that do not scroll should generally override this method and return false.

public boolean showFindDialog (String text, boolean showIme)

Added in API level 11

This method was deprecated in API level 18.
This method does not work reliably on all Android versions; implementing a custom find dialog using WebView.findAllAsync() provides a more robust solution.

Starts an ActionMode for finding text in this WebView. Only works if this WebView is attached to the view system.

Parameters

text	if non-null, will be the initial text to search for. Otherwise, the last String searched for in this WebView will be used to start.
showIme	if true, show the IME, assuming the user will begin typing. If false and text is non-null, perform a find all.

Returns

true if the find dialog is shown, false otherwise

public void stopLoading ()

Added in API level 1

Stops the current load.

public void zoomBy (float zoomFactor)

Added in API level 21

Performs a zoom operation in this WebView.

Parameters

zoomFactor	the zoom factor to apply. The zoom factor will be clamped to the Webview's zoom limits. This value must be in the range 0.01 to 100.0 inclusive.

public boolean zoomIn ()

Added in API level 1

Performs zoom in in this WebView.

Returns

true if zoom in succeeds, false if no zoom changes

public boolean zoomOut ()

Added in API level 1

Performs zoom out in this WebView.

Returns

true if zoom out succeeds, false if no zoom changes

Protected Methods

protected int computeHorizontalScrollOffset ()

Added in API level 1

Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollRange() and computeHorizontalScrollExtent().

The default offset is the scroll offset of this view.

Returns

the horizontal offset of the scrollbar's thumb

protected int computeHorizontalScrollRange ()

Added in API level 1

Compute the horizontal range that the horizontal scrollbar represents.

The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollExtent() and computeHorizontalScrollOffset().

The default range is the drawing width of this view.

Returns

the total horizontal range represented by the horizontal scrollbar

protected int computeVerticalScrollExtent ()

Added in API level 1

Compute the vertical extent of the vertical scrollbar's thumb within the vertical range. This value is used to compute the length of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollOffset().

The default extent is the drawing height of this view.

Returns

the vertical extent of the scrollbar's thumb

protected int computeVerticalScrollOffset ()

Added in API level 1

Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollExtent().

The default offset is the scroll offset of this view.

Returns

the vertical offset of the scrollbar's thumb

protected int computeVerticalScrollRange ()

Added in API level 1

Compute the vertical range that the vertical scrollbar represents.

The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollExtent() and computeVerticalScrollOffset().

Returns

the total vertical range represented by the vertical scrollbar
The default range is the drawing height of this view.

protected void dispatchDraw (Canvas canvas)

Added in API level 1

Called by draw to draw the child views. This may be overridden by derived classes to gain control just before its children are drawn (but after its own view has been drawn).

Parameters

canvas	the canvas on which to draw the view

protected void onAttachedToWindow ()

Added in API level 1

This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called before onDraw(android.graphics.Canvas), however it may be called any time before the first onDraw -- including before or after onMeasure(int, int).

protected void onConfigurationChanged (Configuration newConfig)

Added in API level 8

Called when the current configuration of the resources being used by the application have changed. You can use this to decide when to reload resources that can changed based on orientation and other configuration characteristics. You only need to use this if you are not relying on the normal Activity mechanism of recreating the activity instance upon a configuration change.

Parameters

newConfig	The new resource configuration.

protected void onDraw (Canvas canvas)

Added in API level 1

Implement this to do your drawing.

Parameters

canvas	the canvas on which the background will be drawn

protected void onFocusChanged (boolean focused, int direction, Rect previouslyFocusedRect)

Added in API level 1

Called by the view system when the focus state of this view changes. When the focus change event is caused by directional navigation, direction and previouslyFocusedRect provide insight into where the focus is coming from. When overriding, be sure to call up through to the super class so that the standard focus handling will occur.

Parameters

focused	True if the View has focus; false otherwise.
direction	The direction focus has moved when requestFocus() is called to give this view focus. Values are `FOCUS_UP`, `FOCUS_DOWN`, `FOCUS_LEFT`, `FOCUS_RIGHT`, `FOCUS_FORWARD`, or `FOCUS_BACKWARD`. It may not always apply, in which case use the default.
previouslyFocusedRect	The rectangle, in this view's coordinate system, of the previously focused view. If applicable, this will be passed in as finer grained information about where the focus is coming from (in addition to direction). Will be `null` otherwise.

protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec)

Added in API level 1

Measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overridden by subclasses to provide accurate and efficient measurement of their contents.

CONTRACT: When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.

The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.

If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).

Parameters

widthMeasureSpec	horizontal space requirements as imposed by the parent. The requirements are encoded with `View.MeasureSpec`.
heightMeasureSpec	vertical space requirements as imposed by the parent. The requirements are encoded with `View.MeasureSpec`.

protected void onOverScrolled (int scrollX, int scrollY, boolean clampedX, boolean clampedY)

Added in API level 9

Called by overScrollBy(int, int, int, int, int, int, int, int, boolean) to respond to the results of an over-scroll operation.

Parameters

scrollX	New X scroll value in pixels
scrollY	New Y scroll value in pixels
clampedX	True if scrollX was clamped to an over-scroll boundary
clampedY	True if scrollY was clamped to an over-scroll boundary

protected void onScrollChanged (int l, int t, int oldl, int oldt)

Added in API level 1

This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents). This is typically as a result of scrollBy(int, int) or scrollTo(int, int) having been called.

Parameters

l	Current horizontal scroll origin.
t	Current vertical scroll origin.
oldl	Previous horizontal scroll origin.
oldt	Previous vertical scroll origin.

protected void onSizeChanged (int w, int h, int ow, int oh)

Added in API level 1

This is called during layout when the size of this view has changed. If you were just added to the view hierarchy, you're called with the old values of 0.

Parameters

w	Current width of this view.
h	Current height of this view.
ow	Old width of this view.
oh	Old height of this view.

protected void onVisibilityChanged (View changedView, int visibility)

Added in API level 8

Called when the visibility of the view or an ancestor of the view has changed.

Parameters

changedView	The view whose visibility changed. May be `this` or an ancestor view.
visibility	The new visibility, one of `VISIBLE`, `INVISIBLE` or `GONE`.

protected void onWindowVisibilityChanged (int visibility)

Added in API level 1

Called when the window containing has change its visibility (between GONE, INVISIBLE, and VISIBLE). Note that this tells you whether or not your window is being made visible to the window manager; this does not tell you whether or not your window is obscured by other windows on the screen, even if it is itself visible.

Parameters

visibility	The new visibility of the window.

Results

Annotations

Interfaces

Classes

Enums

WebView

Class Overview

Basic usage

Zoom

Cookie and window management

Building web pages to support different screen densities

HTML5 Video support

Full screen support

Layout size

Summary

Constants

public static final String SCHEME_GEO

public static final String SCHEME_MAILTO

public static final String SCHEME_TEL

Public Constructors

public WebView (Context context)

Parameters

public WebView (Context context, AttributeSet attrs)

Parameters

public WebView (Context context, AttributeSet attrs, int defStyleAttr)

Parameters

public WebView (Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)

Parameters

public WebView (Context context, AttributeSet attrs, int defStyleAttr, boolean privateBrowsing)

Parameters

Public Methods

public void addJavascriptInterface (Object object, String name)

Parameters

public boolean canGoBack ()

Returns

public boolean canGoBackOrForward (int steps)

Parameters

public boolean canGoForward ()

Returns

public boolean canZoomIn ()

Returns

public boolean canZoomOut ()

Returns

public Picture capturePicture ()

Returns

public void clearCache (boolean includeDiskFiles)

Parameters

public static void clearClientCertPreferences (Runnable onCleared)

Parameters

public void clearFormData ()

public void clearHistory ()

public void clearMatches ()

public void clearSslPreferences ()

public void clearView ()

public void computeScroll ()

public WebBackForwardList copyBackForwardList ()

public PrintDocumentAdapter createPrintDocumentAdapter ()

public PrintDocumentAdapter createPrintDocumentAdapter (String documentName)

Parameters

public WebMessagePort[] createWebMessageChannel ()

Returns

public void destroy ()

public boolean dispatchKeyEvent (KeyEvent event)

Parameters

Returns

public void documentHasImages (Message response)

Parameters

public static void enableSlowWholeDocumentDraw ()

public void evaluateJavascript (String script, ValueCallback<String> resultCallback)

Parameters

public static String findAddress (String addr)

Parameters

Returns

public int findAll (String find)

Parameters

Returns

See Also

public void findAllAsync (String find)

Parameters

See Also