Question

几天前，位置服务工作得很好。现在，该服务仍将启动，但我不再从LocationListener接收更新。＆＃34; OnLocationChanged＆＃34;永远不会被召唤。

这是该服务的代码：

public class LocationUpdateService extends Service {

private LocationListener locationListener;
private LocationManager locationManager;
private LatLng Location = new LatLng(0,0);
private String best;

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

@Override
public void onCreate(){
    Thread t = new Thread(new Runnable() {
        @Override
        public void run() {
            Looper.prepare();
            Log.i("LocationService", "Called 'onCreate'");

            locationListener = new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    Intent i = new Intent("location_update");
                    Location = new LatLng(location.getLatitude(), location.getLongitude());
                    i.putExtra("Longitude", Location.longitude);
                    i.putExtra("Latitude", Location.latitude);
                    sendBroadcast(i);
                    Log.i("LocationService", location.getLongitude() + ", " + location.getLatitude());
                }
                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) {
                    Log.i("LocationService", "Status Changed");
                }
                @Override
                public void onProviderEnabled(String provider) {
                    Log.i("LocationService", "Provided is Enabled");
                }
                @Override
                public void onProviderDisabled(String provider) {
                    Log.i("LocationService", "Provider is Disabled");
                    Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(i);
                }
            };

            locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
            Criteria crit = new Criteria();
            crit.setAccuracy(Criteria.ACCURACY_FINE);
            best = locationManager.getBestProvider(crit, false);
            //noinspection MissingPermission
            locationManager.requestLocationUpdates(best, 10000, 0, locationListener);
        }
    });
    t.start();
}
@Override
public void onDestroy(){
    super.onDestroy();
    if(locationManager != null){
        locationManager.removeUpdates(locationListener);
    }
}
}

我拥有清单中包含的所有必要权限。我没有在控制台中收到任何更新消息，但我确实收到了服务至少已启动的日志消息。

编辑：这是我请求运行时权限的方式：

    private void StartLocationService() {
    Intent LocationService = new Intent(this, LocationUpdateService.class);
    startService(LocationService);
}

private boolean runtime_permissions(){
    if(Build.VERSION.SDK_INT >= 23 && (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)){
        requestPermissions(new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION, android.Manifest.permission.ACCESS_COARSE_LOCATION},100);
        return true;
    }
    return false;
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == 100){
        if ( grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED){
            StartLocationService();
        }
        else {
            runtime_permissions();
        }
    }
}

Answer 1

您的目标是Android 6.0或更高版本吗？

如果是这样，将权限添加到清单是不够的，您还需要请求运行时权限。结帐https://developer.android.com/training/permissions/requesting.html

之前可能之前有效，因为你在以前版本的Android上运行了吗？

另外，我认为你不需要在后台线程上运行它。尝试在主线程上调用所有内容，看看会发生什么。我有一种感觉你不应该在UI线程以外的线程上调用startActivity（），但我不完全确定。

Android：onLocationChanged从未调用过（权限工作）

1 个答案: