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我想检测用户何时更改Android手机的GPS设置.当用户打开/关闭GPS卫星或通过接入点等进行检测时的​​含义

在我的应用程序中,我有一个GpsStatus.Listener,用于在用户启用或禁用GPS时接收事件.如果在启动应用程序之前启用GPS,一切正常.在这种情况下,每次打开或关闭GPS时,我都会收到GPS_EVENT_STARTED或GPS_EVENT_STOPPED.

问题是如果应用程序启动时GPS已关闭.在这种情况下,如果我打开或关闭GPS,我不会收到任何事件.

有人可以向我解释一下吗？

这是我的代码:

public class GPSTracker implements android.location.GpsStatus.Listener {

    private final Context context;
    private final LocationListener locListener;
    private LocationManager locationManager;
    private boolean isGPSEnabled = false;

    public GPSTracker(Context context, LocationListener locListener) {
            this.context = context;
            this.locListener = locListener; 
            setupGPS();
    }

    private void setupGPS() {
            locationManager = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);                
            locationManager.addGpsStatusListener(this);
            isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
            if(!isGPSEnabled) {
                    Toast.makeText(getContext(), "GPS disabled", Toast.LENGTH_SHORT).show();
            } else {        
                    locationManager.removeUpdates(locListener);
                    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME, MIN_DISTANCE, locListener);
            }
    }

    @Override
    public …