How to set click listener for notification?

Question

I am using the following code to launch a notification when a Service is started Via AlarmManager:

nm = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
CharSequence from = "App";
CharSequence message = "Getting Latest Info...";
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(), 0);
Notification notif = new Notification(R.drawable.icon,
    "Getting Latest Info...", System.currentTimeMillis());
notif.setLatestEventInfo(this, from, message, contentIntent);
nm.notify(1, notif);

How do I set an intent for this item so that when the user clicks on it, it would launch a certain activity?

Answer 1

You basically need to put the Activity class as part of your intent into your PendingIntent. Currently your Intent is empty. To redirect to new activity, it should be:

// This line of yours should contain the activity that you want to launch. 
// You are currently just passing empty new Intent()
PendingIntent contentIntent = 
    PendingIntent.getActivity(this, 0, new Intent(this, MyActivity.class), 0);

Answer 2

As for yoshi24's comment, you may be able to set extras like this.

final Intent intent = new Intent(this, MyActivity.class);
intent.setData(data);
intent.putExtra("key", "value");
final PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, 0);

You need to be aware of this as well before going for pending intents

https://stackoverflow.com/questions/1198558/how-to-send-parameters-from-a-notification-click-to-an-activity

UPDATE some thing like this will work for you

int your mainfest

<activity android:name=".MyActivity" android:launchMode="singleTop" ... />

in your activity

@Override
protected void onCreate(Bundle savedInstanceState) {
    processIntent(getIntent());
}

@Override
protected void onNewIntent(Intent intent) {     
    processIntent(intent);
};

private void processIntent(Intent intent){
    //get your extras
}

Answer 3

I did it,

• I add Intent.FLAG_ACTIVITY_CLEAR_TOP to new intent

  NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
  Notification notification = new Notification(R.drawable.ic_launcher,
          "A new notification", System.currentTimeMillis());
  // Hide the notification after its selected
  notification.flags |= Notification.FLAG_AUTO_CANCEL;
  
  Intent intent = new Intent(this, NoficationDemoActivity.class);
  intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
  Bundle bundle = new Bundle();
  bundle.putString("buzz", "buzz");
  intent.putExtras(bundle);
  PendingIntent activity = PendingIntent.getActivity(this, 0, intent, 0);
  notification.setLatestEventInfo(this, "This is the title",
          "This is the text", activity);
  notification.number += 1;
  notificationManager.notify(0, notification);
  

• Oncreate i do as follow:

  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  if(getIntent().getExtras()!=null){
      Toast.makeText(this, "Click", Toast.LENGTH_SHORT).show();
  }