Android APIs
public final class

NetworkStats

extends Object
implements AutoCloseable
java.lang.Object
   ↳ android.app.usage.NetworkStats

Class Overview

Class providing enumeration over buckets of network usage statistics. NetworkStats objects are returned as results to various queries in NetworkStatsManager.

Summary

Nested Classes
class NetworkStats.Bucket Buckets are the smallest elements of a query result. 
Public Methods
void close()
Closes the enumeration.
boolean getNextBucket(NetworkStats.Bucket bucketOut)
Fills the recycled bucket with data of the next bin in the enumeration.
boolean hasNextBucket()
Check if it is possible to ask for a next bucket in the enumeration.
Protected Methods
void finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
[Expand]
Inherited Methods
From class java.lang.Object
From interface java.lang.AutoCloseable

Public Methods

public void close ()

Added in API level 23

Closes the enumeration. Call this method before this object gets out of scope.

public boolean getNextBucket (NetworkStats.Bucket bucketOut)

Added in API level 23

Fills the recycled bucket with data of the next bin in the enumeration.

Parameters
bucketOut Bucket to be filled with data.
Returns
  • true if successfully filled the bucket, false otherwise.

public boolean hasNextBucket ()

Added in API level 23

Check if it is possible to ask for a next bucket in the enumeration.

Returns
  • true if there is at least one more bucket.

Protected Methods

protected void finalize ()

Added in API level 23

Invoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.

Note that objects that override finalize are significantly more expensive than objects that don't. Finalizers may be run a long time after the object is no longer reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup. Note also that finalizers are run on a single VM-wide finalizer thread, so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary for a class that has a native peer and needs to call a native method to destroy that peer. Even then, it's better to provide an explicit close method (and implement Closeable), and insist that callers manually dispose of instances. This works well for something like files, but less well for something like a BigInteger where typical calling code would have to deal with lots of temporaries. Unfortunately, code that creates lots of temporaries is the worst kind of code from the point of view of the single finalizer thread.

If you must use finalizers, consider at least providing your own ReferenceQueue and having your own thread process that queue.

Unlike constructors, finalizers are not automatically chained. You are responsible for calling super.finalize() yourself.

Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.

Throws
Throwable