Detect which app has been launched in android

Question

How to detect which app has been launched by user in my app i.e my application should get notified when Whatsapp is launched by user even if my app is not running in foreground

Answer 1

Try this code:

  ActivityManager activityManager = (ActivityManager) this.getSystemService( ACTIVITY_SERVICE );
    List procInfos = activityManager.getRunningAppProcesses();
    for(int i = 0; i < procInfos.size(); i++)
    {
        if(procInfos.get(i).processName.equals("put the package name here")) 
        {
            Toast.makeText(getApplicationContext(), "Notify Message", Toast.LENGTH_LONG).show();
        }
    }