位置侦听器不在网络提供程序上

Question

我有以下代码，来试验wifi的位置：

public class MainActivity extends AppCompatActivity {    
   Context mContext;
   TextView text;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mContext=getApplicationContext();
    text=findViewById(R.id.text1);
    askpermissions();
    doLocationStuff();
}
void doLocationStuff(){
    LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

    LocationListener locationListener = new LocationListener() {
        public void onLocationChanged(Location location) {
            // Called when a new location is found by the network location provider.
            text.append(location.getLatitude()+" "+location.getLatitude());
            Toast.makeText(mContext, location.getLatitude()+" "+location.getLatitude(), Toast.LENGTH_SHORT).show();
        }

        public void onStatusChanged(String provider, int status, Bundle extras) {}

        public void onProviderEnabled(String provider) {}

        public void onProviderDisabled(String provider) {
            Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(i);
        }
    };


    if(ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION)== PackageManager.PERMISSION_GRANTED) {
        text.setText("wifi gps");
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
    }
}

void askpermissions(){
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ||
            ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED ||
            ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED ||
            ActivityCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) !=PackageManager.PERMISSION_GRANTED) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.INTERNET,Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE}
                    ,10);
        }
    }

}

当我将提供者设置为GPS_PROVIDER时，应用程序按预期工作（位置显示在textview和toast中）。

但是，当我使用NETWORK_PROVIDER时，没有任何反应（textview停留在wifi gps并且没有出现toast）。我的应用程序允许粗略和精细的位置和互联网访问，并启用GPS和Wifi。

我认为我的路由器的位置没有记录，但是当我打开谷歌地图时，它的估计会更好。

编辑：该代码适用于android 5的三星Galaxy A5，但不适用于搭载Android 6的华为P8 lite

我究竟做错了什么？