How to notify users about an Android app update?

I've built an Android app which is now on Play Market. From time to time, I make updates to it, and I'd like to let users know that a new version is available.

How can I send an update notification to the users of the app?

How do I send push notifications on Android?

Navigate to Settings > Mobile Apps. Click the mobile app for which you'd like to send a push notification. For Device Token, enter the token you located above. For Message, enter a message to display in the push notification.

What is notify method in Android?

A notification is a message that Android displays outside your app's UI to provide the user with reminders, communication from other people, or other timely information from your app. Users can tap the notification to open your app or take an action directly from the notification.

You do not need to do anything specific for this. Since you mentioned that you are using Google Play, the update notification is taken care of by Google Play.

You just need to update the APK with a higher versionCode and Google Play should do the rest.