当Activity停止时，onLocationChanged停止在服务中工作

Question

我有一个MainActivity，它启动MainService以使用 GoogleApiClient 记录某些位置。

onLocationChanged 在服务中（但我在MainActivy中有另一个地图）。

活动运行时，会正常调用 onLocationChanged 。当Activity停止时，永远不会调用 onLocationChanged （但服务仍在运行）。

服务以 startForeground 启动， onStartCommand 返回 START_STICKY ;

为什么停止调用onLocationChanged？

编辑：代码

...
public class MainService extends Service implements
    LocationListener,
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener {

@Override
public void onCreate() {
    Intent notificationIntent = new Intent(this, MainActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
            notificationIntent, 0);
    Notification notification = new NotificationCompat.Builder(this)
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentTitle("My App")
            .setContentText("Working")
            .setContentIntent(pendingIntent).build();
    startForeground(42, notification);
    initGoogleApi();
    super.onCreate();
}

...

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    LocalBroadcastManager.getInstance(this).registerReceiver((broadcastReceiver),
            new IntentFilter(Config.SERVICE_RESULT));
    return START_STICKY;
}

private void initGoogleApi(){
    if (mGoogleApiClient == null) {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(5000);
        mLocationRequest.setFastestInterval(3000);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
        mLocationRequest.setSmallestDisplacement(50F);
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

        mGoogleApiClient.connect();
    }
}

@Override
public void onConnected(Bundle bundle) {
    startLocationUpdates();
}

@Override
public void onLocationChanged(Location location) {
    doStuff(location);
}

@Override
public void onConnectionSuspended(int i) {
}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}

protected void startLocationUpdates() {
    try {
        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            //TODO
            return;
        }
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
    } catch (IllegalStateException e) {
        Log.e("Service", "SERVICE IllegalStateException in startLocationUpdates");
    }
}