package com.simcoder.uber; import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.support.annotation.Nullable; import com.firebase.geofire.GeoFire; import com.google.firebase.auth.FirebaseAuth; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.FirebaseDatabase; public class onAppKilled extends Service { @Nullable @Override public IBinder onBind(Intent intent) { return null; } @Override public void onTaskRemoved(Intent rootIntent) { super.onTaskRemoved(rootIntent); String userId = FirebaseAuth.getInstance().getCurrentUser().getUid(); DatabaseReference ref = FirebaseDatabase.getInstance().getReference("driversAvailable"); GeoFire geoFire = new GeoFire(ref); geoFire.removeLocation(userId); } }