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public class MyApplication extends Application{
private static MyApplication instance;
private List<Activity> activitylist=new LinkedList<Activity>();
public static MyApplication getInstance(){
if(null==instance){
instance = new MyApplication();
}
return instance;
}
public void addActivity(Activity activity){
activitylist.add(activity);
}
public void exit(){
for(Activity ac:activitylist){
ac.finish();
}
System.exit(0);
}
}