Android中Activity共享变量Application context

public class MyApplication extends Application {

private static Context context = null;
private static MyApplication myApplication = null;


@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
Log.v("MyApplication", "onCreate");
context = this.getApplicationContext();
myApplication = this;
}


public static Context getContext() {
return context;
}

}

//Androidmanifest.xml

<application
        android:allowBackup="true"
        android:name="com.example.testcontent.MyApplication"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >