OpenDirect deep link not working for push notifications

When you send push notifications from Apex, you don't need to know which devices users have registered. You need to create a list of user ids for the users you want to send notification to. Then create Messaging.PushNotification object, set a payload for this object and use its "send" method to send push notifications to the list of users. Here is an example:

https://developer.salesforce.com/docs/atlas.en-us.pushImplGuide.meta/pushImplGuide/pns_apex_trigger.htm

If you have 2 applications that you want to send the same notifications to (1 for Android and 1 for iOS), you will call "send" method 2 times for the same list of user ids but with different application name. You can also create different Messaging.PushNotification objects for iOS and Android notifications and use different payload if you need.

The issue here is that once the SDK receives the Builder from your method it will also call Builder#setContentIntent which will override the Intent you originally set.

A workaround for you would be to register an implementation of ETNotificationLaunchIntent that returns a null Intent.

ETNotifications.setNotificationLaunchIntent(new ETNotificationLaunchIntent() {
  @Override public Intent setupLaunchIntent(Context context, Bundle payload) {
    if (TextUtils.isEmpty(payload.getString("link"))) {
      return null;
    }

    //Allow other notifications to work as expected.
    return ETNotifications.setupLaunchIntent(context, payload);
  }
});

If the SDK finds that the launch intent is null it will not override the Intent set on the Builder.

One additional note: If you want to get analytic data for notification opens you must first add the payload to the Intent you created, then use ETNotifications.createPendingIntentWithOpenAnalytics when creating the PendingIntent for the Builder.

        contentIntent.putExtras(payload);
    builder.setContentIntent(ETNotifications.createPendingIntentWithOpenAnalytics(context, contentIntent, true));