Question

我的问题是我可以在后台获取位置，但是一旦应用被杀死，它就会停止更新。一旦从getlastlocation方法获取信息，我便将纬度和经度存储到Firebase中。以及前台和后台模式都可以正常更新。但是当我像清除所有后台应用程序一样关闭时，它将停止更新。

public class MyBackgroundLocationService extends Service {
    private static final String TAG = MyBackgroundLocationService.class.getSimpleName();
    private FusedLocationProviderClient mLocationClient;
    private LocationCallback mLocationCallback;

    public MyBackgroundLocationService() {
    }

    @Override
    public void onCreate() {
        super.onCreate();
        mLocationClient = LocationServices.getFusedLocationProviderClient(getApplicationContext());
        mLocationCallback = new LocationCallback() {
            @Override
            public void onLocationResult(LocationResult locationResult) {
                if (locationResult == null) {
                    Log.d(TAG, "onLocationResult: location error");
                    return;
                }

                List<Location> locations = locationResult.getLocations();

                LocationResultHelper helper = new LocationResultHelper(getApplicationContext(), locations);

                helper.showNotification();

                helper.saveLocationResults();

                Toast.makeText(getApplicationContext(), "Location received: " + locations.size(), Toast.LENGTH_SHORT).show();

            }
        };
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        Log.d(TAG, "onStartCommand: called");

        startForeground(1001, getNotification());

        getLocationUpdates();

        return START_STICKY;
    }

    private Notification getNotification() {

        NotificationCompat.Builder notificationBuilder = null;
        notificationBuilder = new NotificationCompat.Builder(getApplicationContext(),
                App.CHANNEL_ID)
                .setContentTitle("Location Notification")
                .setContentText("Location service is running in the background.")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setAutoCancel(true);

        return notificationBuilder.build();
    }

    private void getLocationUpdates() {

        LocationRequest locationRequest = LocationRequest.create();
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        locationRequest.setInterval(5000);
        locationRequest.setFastestInterval(4000);

        locationRequest.setMaxWaitTime(15 * 1000);

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            stopSelf();
            return;
        }

        mLocationClient.requestLocationUpdates(locationRequest, mLocationCallback, Looper.myLooper());

    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.d(TAG, "onDestroy: called");
        stopForeground(true);
        mLocationClient.removeLocationUpdates(mLocationCallback);
    }
}

所以我正在使用前台服务在后台更新位置，它将在通知中显示这些更新。应用被杀死后，通知也消失了。请请任何人帮助我。

如果您需要更清楚的问题，我会解释。请有人了解我的痛苦

应用程序处于终止模式时，后台位置更新停止了

0 个答案: