M7350/base/core/java/android/content/ComponentCallbacks.java
2024-09-09 08:52:07 +00:00

55 lines
2.3 KiB
Java

/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.content;
import android.content.res.Configuration;
/**
* The set of callback APIs that are common to all application components
* ({@link android.app.Activity}, {@link android.app.Service},
* {@link ContentProvider}, and {@link android.app.Application}).
*/
public interface ComponentCallbacks {
/**
* 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.
*
* <p>At the time that this function has been called, your Resources
* object will have been updated to return resource values matching the
* new configuration.
*
* @param newConfig The new device configuration.
*/
void onConfigurationChanged(Configuration newConfig);
/**
* 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.
*
* <p>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.
*/
void onLowMemory();
}