Android check in home screen

Some app run constantly on Home screen, we need to hide view if a new app launch. To do this, we need to check if home screen.

Create a service, set alarm to check every 5 seconds, if top app has package tail name is launcher, we know it is home screen.
Add permission in file manifest.xml.
<uses-permission android:name="android.permission.GET_TASKS" />

Declare to top service.

int ra=0;

PendingIntent pi;

BroadcastReceiver br;

AlarmManager am;

Copy this function in to above last close bracket.

private void setup() {

            br = new BroadcastReceiver() {

                  @Override

                  public void onReceive(Context c, Intent i) {

                        ActivityManager am =

                                     (ActivityManager)getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);

ComponentName cn = am.getRunningTasks(1).get(0).topActivity;

String t = am.getRunningTasks(1).get(0).topActivity.getPackageName();

                                     

int d = t.length();

String duoi = t.substring(d-8, d);                           

if(duoi.equals("launcher")){

if(ra==1){

wm.addView(mView, myParams);

ra=0;

}

}

else{

if(ra==0){

((WindowManager) getSystemService(WINDOW_SERVICE))

                                                .removeView(mView);

ra=1;

}                                        

}

};

registerReceiver(br, new IntentFilter("com.example.vidu"));

pi = PendingIntent.getBroadcast(this, 0, new Intent("com.example.vidu"),0);

am = (AlarmManager) (this.getSystemService(Context.ALARM_SERVICE));

am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,

SystemClock.elapsedRealtime(), 5000, pi);

}

Add this to destroy.

@Override

     public void onDestroy() {

          super.onDestroy();

          am.cancel(pi);

          unregisterReceiver(br);

}

Call function setup() inside onCreate();

My view need to hide name mView.

To create view, see this post.

This way make battery soon be exhausted because it check every 5 seconds. To avoid this, we can use  handler