show activity after notification Android -

i´m trying open activity after recieiving push notification.

i recieive notification, when select nothing happens!

the problem trace is:

w/inputmethodmanagerservice(771): window focused, ignoring focus gain of: com.android.internal.view.iinputmethodclient$stub$proxy@438ae618 attribute=null, token = android.os.binderproxy@4319aab8 

here code

public class gcmintentservice extends intentservice {  private static final int notif_alerta_id = 1;  public gcmintentservice() {     super("gcmintentservice"); }  @override protected void onhandleintent(intent intent) {     googlecloudmessaging gcm = googlecloudmessaging.getinstance(this);      string messagetype = gcm.getmessagetype(intent);     bundle extras = intent.getextras();      if (!extras.isempty())     {         if (googlecloudmessaging.message_type_message.equals(messagetype))         {             mostrarnotification(extras.getstring("message"));         }     }      gcmbroadcastreceiver.completewakefulintent(intent); }  private void mostrarnotification(string msg) {     notificationmanager mnotificationmanager = (notificationmanager) getsystemservice(context.notification_service);     intent notintent = new intent(this, openbynotificationactivity.class);     pendingintent contintent = pendingintent.getactivity(this, 1, notintent, 0);      notificationcompat.builder mbuilder = new notificationcompat.builder(this)     .setsmallicon(android.r.drawable.stat_sys_warning)     .setcontenttitle("notificación appmovil")     .setcontenttext(msg)     .setcontentintent(contintent);      mnotificationmanager.notify(notif_alerta_id, mbuilder.build()); } 

and i´ve putted activity in manifest

<activity android:name="es.blabla.appmovil.activity.openbynotificationactivity" >     </activity> 

where mistake???

thanks everyone!!

edit:

fixed adding android:exported="true" activity in manifest

implement :

private void generatenotification(context context, string message) {  int icon = r.drawable.ic_launcher; long when = system.currenttimemillis(); string appname = context.getresources().getstring(r.string.app_name); notificationmanager notificationmanager = (notificationmanager) context .getsystemservice(context.notification_service);  notification notification; pendingintent contentintent = pendingintent.getactivity(context, 0, new intent(context, myactivity.class), 0);    notificationcompat.builder builder = new notificationcompat.builder(  context);  notification = builder.setcontentintent(contentintent)  .setsmallicon(icon).setticker(appname).setwhen(0)  .setautocancel(true).setcontenttitle(appname)  .setcontenttext(message).build();   notificationmanager.notify(0 , notification);    }