位置侦听器不适用于网络提供商

Question

我有下面的代码，来试验来自 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);
        }
    }

}

当我将提供程序设置为 GPS_PROVIDER 时，应用程序按预期工作（位置显示在文本视图和吐司中）。

但是，当我使用 NETWORK_PROVIDER 时，什么都没有发生（textview 停留在 wifi gps 并且没有 toast 出现）。我的应用程序具有粗略和精细定位和互联网访问权限，并且启用了 GPS 和 Wifi。

我以为我的路由器的位置没有被记录下来，但是当我打开谷歌地图时，它的估计值在 wifi 开启的情况下要好得多。

编辑：该代码在搭载 Android 5 的三星 Galaxy A5 上运行良好，但不适用于搭载 Android 6 的华为 P8 lite

我做错了什么？

Answer 1

尝试检查您的权限

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />