| java.lang.Object | ||
| ↳ | android.view.FrameStats | |
| ↳ | android.view.WindowContentFrameStats | |
This class contains window content frame statistics. For example, a window content
is rendred in frames when a view is scrolled. The frame statistics are a snapshot
for the time interval from getStartTimeNano() to getEndTimeNano().
The key idea is that in order to provide a smooth user experience an application
has to draw a frame at a specific time interval obtained by calling getRefreshPeriodNano(). If the application does not render a frame every refresh
period the user will see irregular UI transitions.
An application posts a frame for presentation by synchronously rendering its contents
in a buffer which is then posted or posting a buffer to which the application is
asychronously rendering the content via GL. After the frame is posted and rendered
(potentially asynchronosly) it is presented to the user. The time a frame was posted
can be obtained via getFramePostedTimeNano(int), the time a frame content
was rendered and ready for dsiplay (GL case) via getFrameReadyTimeNano(int),
and the time a frame was presented on the screen via getFramePresentedTimeNano(int).
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Inherited Constants | |||||||||||
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 From class
android.view.FrameStats
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From interface
android.os.Parcelable
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Describe the kinds of special objects contained in this Parcelable's
marshalled representation.
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Get the time a frame at a given index was posted by the producer (e.g.
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Get the time a frame at a given index was ready for presentation.
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Returns a string containing a concise, human-readable description of this
object.
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Flatten this object in to a Parcel.
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Inherited Methods | |||||||||||
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From class
android.view.FrameStats
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From class
java.lang.Object
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From interface
android.os.Parcelable
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Describe the kinds of special objects contained in this Parcelable's marshalled representation.
Get the time a frame at a given index was posted by the producer (e.g. the application). It is either explicitly set or defaulted to the time when the render buffer was posted.
Note: A frame can be posted and still it contents being rendered
asynchronously in GL. To get the time the frame content was completely rendered and
ready to display call getFrameReadyTimeNano(int).
| index | The frame index. |
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Get the time a frame at a given index was ready for presentation.
Note: A frame can be posted and still it contents being rendered asynchronously in GL. In such a case this is the time when the frame contents were completely rendered.
| index | The frame index. |
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Developers
UNDEFINED_TIME_NANO
if the frame is not ready yet.
Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
getClass().getName() + '@' + Integer.toHexString(hashCode())
See Writing a useful
toString method
if you intend implementing your own toString method.
Flatten this object in to a Parcel.
| parcel | The Parcel in which the object should be written. |
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| flags | Additional flags about how the object should be written.
May be 0 or PARCELABLE_WRITE_RETURN_VALUE.
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