My app receives push notifications when app is closed and is in the background. https://developers.google.com/cloud-messaging/downstream as this document said,
When your app is in the background, Android directs messages with notification to the system tray. A user click on a notification opens the app launcher by default.
But the problem is that I can't handle silent push when my app is in the background or closed. I got push notification that doesn't have a title, it's empty message but it goes off! It's not a silent push at all.
How can I receive my silent push message as silent?