55 lines
2.3 KiB
Java
55 lines
2.3 KiB
Java
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.content;
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import android.content.res.Configuration;
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/**
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* The set of callback APIs that are common to all application components
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* ({@link android.app.Activity}, {@link android.app.Service},
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* {@link ContentProvider}, and {@link android.app.Application}).
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*/
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public interface ComponentCallbacks {
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/**
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* Called by the system when the device configuration changes while your
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* component is running. Note that, unlike activities, other components
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* are never restarted when a configuration changes: they must always deal
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* with the results of the change, such as by re-retrieving resources.
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*
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* <p>At the time that this function has been called, your Resources
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* object will have been updated to return resource values matching the
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* new configuration.
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*
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* @param newConfig The new device configuration.
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*/
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void onConfigurationChanged(Configuration newConfig);
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/**
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* This is called when the overall system is running low on memory, and
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* would like actively running process to try to tighten their belt. While
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* the exact point at which this will be called is not defined, generally
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* it will happen around the time all background process have been killed,
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* that is before reaching the point of killing processes hosting
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* service and foreground UI that we would like to avoid killing.
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*
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* <p>Applications that want to be nice can implement this method to release
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* any caches or other unnecessary resources they may be holding on to.
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* The system will perform a gc for you after returning from this method.
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*/
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void onLowMemory();
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}
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