81 lines
2.8 KiB
Java
81 lines
2.8 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.app;
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import android.content.ComponentCallbacks;
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import android.content.Context;
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import android.content.ContextWrapper;
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import android.content.res.Configuration;
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/**
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* Base class for those who need to maintain global application state. You can
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* provide your own implementation by specifying its name in your
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* AndroidManifest.xml's <application> tag, which will cause that class
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* to be instantiated for you when the process for your application/package is
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* created.
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*
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* <p class="note">There is normally no need to subclass Application. In
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* most situation, static singletons can provide the same functionality in a
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* more modular way. If your singleton needs a global context (for example
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* to register broadcast receivers), the function to retrieve it can be
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* given a {@link android.content.Context} which internally uses
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* {@link android.content.Context#getApplicationContext() Context.getApplicationContext()}
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* when first constructing the singleton.</p>
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*/
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public class Application extends ContextWrapper implements ComponentCallbacks {
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public Application() {
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super(null);
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}
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/**
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* Called when the application is starting, before any other application
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* objects have been created. Implementations should be as quick as
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* possible (for example using lazy initialization of state) since the time
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* spent in this function directly impacts the performance of starting the
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* first activity, service, or receiver in a process.
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* If you override this method, be sure to call super.onCreate().
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*/
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public void onCreate() {
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}
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/**
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* This method is for use in emulated process environments. It will
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* never be called on a production Android device, where processes are
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* removed by simply killing them; no user code (including this callback)
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* is executed when doing so.
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*/
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public void onTerminate() {
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}
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public void onConfigurationChanged(Configuration newConfig) {
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}
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public void onLowMemory() {
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}
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// ------------------ Internal API ------------------
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/**
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* @hide
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*/
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/* package */ final void attach(Context context) {
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attachBaseContext(context);
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}
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}
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