android listen gps status

Helper.java

final LocationManager lm = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);
if (Build.VERSION.SDK_INT >= 24) {
            lm.registerGnssStatusCallback(new GnssStatus.Callback() {
                @Override public void onStarted() {
                    super.onStarted();
                    Log.d(TAG, "gps started");
                    updateGpsView();
                }
            });
        } else {
            lm.addGpsStatusListener(event -> {
                switch (event) {
                    case GPS_EVENT_STARTED:
                        Log.d(TAG, "gps started");
                        updateGpsView();
                        break;
                    case GPS_EVENT_STOPPED:
                        Log.d(TAG, "gps stopped");
                        updateGpsView();
                        break;
                }
            });
        }