Android Application class and it's use

 The Application class is  in the Android api and according to the class name it's used for global settings or running entrance.

We can specify its name in your AndroidManifest.xml's tag

1	<application android:icon="@drawable/icon"  android:label= "@string/app_name" android:name="MyApplication">

We can create our own subclass of Application like this:

public class MyApplication extends Application {

       @Override

       public void onConfigurationChanged(Configuration newConfig) {

           super.onConfigurationChanged(newConfig);

        }

      @Override

       public void onCreate() {

                super.onCreate();

       }

      @Override

       public void onLowMemory() {

             super.onLowMemory();

    }

      @Override

       public void onTerminate() {

             super.onTerminate();

    }

}

Application level callbacks

• onConfigurationChanged( ) Called by the system when the device configuration changes while your component is running.
• onCreate( ) Called when the application is starting, before any other application objects have been created.
• onLowMemory( ) This is called when the overall system is running low on memory, and would like actively running processes to tighten their belts.
• onTerminate( ) 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.