title: Push Notification when app is running
body: <p>I am implementing push notification and so far it works fine. I manage to get push notification and when I click on that able to start activity. </p>
  
  <p>But I don't want to notify user about notification if app is already running. This how I am planning to do this...but not sure is this correct way</p>
  
  <pre><code>Intent actIntent = new Intent(this, MainActivity.class);
              actIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
              PendingIntent pIntent = PendingIntent.getActivity(this, 0, actIntent, 0);
  
  if (!isActivityRunning())
  mNotificationManager.notify(0, notification);
  
  
  public boolean isActivityRunning(Context ctx) {
      ActivityManager activityManager = (ActivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);
      List&lt;RunningTaskInfo&gt; tasks = activityManager.getRunningTasks(Integer.MAX_VALUE);
  
      for (RunningTaskInfo task : tasks) {
          if (ctx.getPackageName().equalsIgnoreCase(task.baseActivity.getPackageName())) 
              return true;                                  
      }
  
      return false;
  }
  </code></pre>
  
  <p>isActivityRunning function will basically checks whether MainActivity is running or not. If it is in running state then won't show notification and will pass information to activity itself to update UI. If activity is not running on click of notification MainActivity will open.</p>
  
  <p>Is this right way of achieving  this? </p>