MainActivity销毁后如何使用Service调用MainActivity方法

Question

I'm using a service which repeatedly needs to call a MainActivity method. The service runs in background after MainActivity is destroyed. But when calling the said method, it crashes.

So, how do I access classes using service even after app is killed.

My service class's method

public int onStartCommand(Intent intent, int flags, int startId) {

    // This service runs in background 

    broadcastIntent(); // Start my MainActivity. Because the app is killed

}

Answer 1

Maybe with some LiveData? I've started to learn how it works and maybe it might help you

Answer 2

I found the answer in case someone's looking for it:

Classes declared in AndroidManifest can always be accessed using intents no matter app is running or not.