DataBufferObserver | Android Developers

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## Results

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Summary: Nested Classes | Methods | [Expand All]
public interface

# DataBufferObserver

com.google.android.gms.common.data.DataBufferObserver

Known Indirect Subclasses DataBufferObserverSet
DataBufferObserverSet | Utility class for managing a set of observers and distributing their notifications.

## Class Overview

An interface for notifying an observer about changes to a DataBuffer. To support adding multiple observers, see `DataBufferObserverSet`. It allows you to delegate addObserver and removeObserver to it and it will handle distributing all the notifications to all registered observers.

##### See Also

- `DataBuffer`

## Summary

Nested Classes
interface | DataBufferObserver.Observable | Interface a data buffer can implement to expose the fact that it supports observation.

Public Methods
abstract void | onDataChanged() Called when the overall data changes.
abstract void | onDataRangeChanged(int position, int count) Called when a range of items changes.
abstract void | onDataRangeInserted(int position, int count) Called when a range of items is inserted.
abstract void | onDataRangeMoved(int fromPosition, int toPosition, int count) Called when a range of items is moved.
abstract void | onDataRangeRemoved(int position, int count) Called when a range of items is removed.

## Public Methods

#### public abstract void onDataChanged ()

Called when the overall data changes.

#### public abstract void onDataRangeChanged (int position, int count)

Called when a range of items changes.

#### public abstract void onDataRangeInserted (int position, int count)

Called when a range of items is inserted.

#### public abstract void onDataRangeMoved (int fromPosition, int toPosition, int count)

Called when a range of items is moved.

#### public abstract void onDataRangeRemoved (int position, int count)

Called when a range of items is removed.