Waking up my android app from background into the main screen programatically

Question

I am trying to make a taxi driver app that lets me wake the phone and directly open the app from the background whenever I get an fcm notification. What do we call this feature? and how can I implement it on android using java? I found many implementations but they all do it when clicking on notifications.

An explanation for the "it's a bad behavior" argument: "This is a driver side taxi app that really needs the quick response on notification because it has a timeout feature built-in. and I can ensure that all drivers have signed physical contracts that include this feature as a clause"

question from:https://stackoverflow.com/questions/66047272/waking-up-my-android-app-from-background-into-the-main-screen-programatically

Answer 1

You may go through following steps:

1. Start a Foreground Service (that always run in background )
2. In Your Service Class catch Your Event(like you said fcm notification) and start your app activity.( Rather you should alert user with alarm tone or on-screen Dialog

Here's an wonderful example that uses a background service(you may change it into a foreground service) to show a fragment on lockscreen hope this will help you know how and where to start.

and also it's not a bad behavior cause the notification panel will always show that your foreground service is running untill and unless user himself turn notifications off your app