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Android APIs
Added in API level 1
public interface

ComponentCallbacks

android.content.ComponentCallbacks
Known Indirect Subclasses

Class Overview

The set of callback APIs that are common to all application components (Activity, Service, ContentProvider, and Application).

Summary

Public Methods
abstract void onConfigurationChanged(Configuration newConfig)
Called by the system when the device configuration changes while your component is running.
abstract void onLowMemory()
This is called when the overall system is running low on memory, and would like actively running process to try to tighten their belt.

Public Methods

public abstract void onConfigurationChanged (Configuration newConfig)

Added in API level 1

Called by the system when the device configuration changes while your component is running. Note that, unlike activities, other components are never restarted when a configuration changes: they must always deal with the results of the change, such as by re-retrieving resources.

At the time that this function has been called, your Resources object will have been updated to return resource values matching the new configuration.

Parameters
newConfig The new device configuration.

public abstract void onLowMemory ()

Added in API level 1

This is called when the overall system is running low on memory, and would like actively running process to try to tighten their belt. While the exact point at which this will be called is not defined, generally it will happen around the time all background process have been killed, that is before reaching the point of killing processes hosting service and foreground UI that we would like to avoid killing.

Applications that want to be nice can implement this method to release any caches or other unnecessary resources they may be holding on to. The system will perform a gc for you after returning from this method.