title: when Open notification to intent activity when app is closed on android
body: <p>I use the code below to open notification to intent activity  when app closed, but it crash while get notification.
  Please help me! 
  It is my first time in stackoverflow question.</p>
  
  <pre><code>import com.pushbots.push.Pushbots;
  import android.app.Application;
  
  public class Myapplication extends Application {
      private String SENDER_ID="1048363856500";
      private String PUSHBOTS_APPLICATION_ID="541a3e411d0ab1a4018b45b5";
  
      public void onCreate(){
      Pushbots.init(this, SENDER_ID,PUSHBOTS_APPLICATION_ID);
      Pushbots.getInstance().setMsgReceiver(customHandler.class);
      super.onCreate();
      }
  </code></pre>