how to check the top activity from android app in background service

Question

In my app i want to check whethere any other app launches or not from my app.So i am currently usimg Activitymanager to find the top activity like this

Act         


        

Answer 1

By using service you can achieve this..

public void checkActivity() {
    handler = new Handler();
    activityRunnable = new ActivityRunnable();
    handler.postDelayed(activityRunnable, 500);
}

private class ActivityRunnable implements Runnable {
    @Override
    public void run() {
        ActivityManager manager = (ActivityManager) getApplicationContext()
                .getSystemService(Context.ACTIVITY_SERVICE);
        List runningTasks = manager.getRunningTasks(1);
        if (runningTasks != null && runningTasks.size() > 0) {
            ComponentName topActivity = runningTasks.get(0).topActivity;
            // Here you can get the TopActivity for every 500ms
            if(!topActivity.getPackageName().equals(getPackageName())){
                // Other Application is opened
            }
            handler.postDelayed(this, 500);
        }
    }
}

Call the checkActivity() in onCreate of service and dont forgot to remove the handler.removeCallbacks(activityRunnable); callbacks in onDestroy

start the service in LauncherActivity onCreate and stop the service in LauncherActivity onDestroy

Note: Dont forgot to add the permission in your manifest