Error calling getSupportFragmentManager() from a Broadcast receiver

Question

I try to call a method that calls getSupportFragmentManager() however i get:

IllegalStateException: FragmentManager has not been attached to a host.

The broadcast receiver fires and the method which is in the activity which is currently in the UI fires as below but i get the error:

BottomSheet bottomSheet = new BottomSheet();
bottomSheet.show(getSupportFragmentManager(), "bottomButtons");

All i am attempting to do is call the bottomSheet from a service which i have to do via a broadcast receiver as i cant call getSupportFragmentManager from the service! How can i get the sheet to appear, triggered by an event in my service?

Answer 1

To Call the method which displays my BottomSheet which is situated in the Activity that is currently displayed in the UI from a background service. I used MutableLiveData.

I initialised a global Boolean finished, in my service;

public static MutableLiveData<Boolean> finished = new MutableLiveData<Boolean>();

When the required event triggers in my Service i set the value of the live data variable to true. with

finished.setValue(true);

In the activity i need to display the BottomSheet i am observing this variable via:

finished.observe(this, new Observer<Boolean>(){

@Override
public void onChanged(Boolean aBoolean){
if(aBoolean){
//I call my Method here which displays my Bottom Sheet, this is the method that contains the getSupportFragmentManager().
}
}
});

I hope this can help anyone in my situation.