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