Flutter Geolocator.getCurrentPosition() 不返回任何内容

Question

我使用 Geolocator 软件包已经有一段时间了，它运行良好，但在过去 2 天它不起作用。 我正在尝试获取最后一个已知位置，如果没有，我会尝试获取当前位置。 getLastKnownPosition() 返回 null，而 getCurrentPosition() 永远不会完成并且不返回任何内容。

PS：在android模拟器和IOS模拟器上它工作正常，但在我的android物理设备上它不起作用。

这是我的功能：

Future<Position> locateUser() async {
  final result = await Geolocator.getLastKnownPosition(
      forceAndroidLocationManager: true);
  if (result != null) {
    return result;
  }
  final result1 = await Geolocator.getCurrentPosition();
  return result1;
}

-我已尝试卸载该应用程序并重新安装

-我尝试过关闭和打开 GPS

Answer 1

尝试以下几点 -

1. 权限检查（如果未完成）。
2. 添加超时（有时网络问题和GPS信号不起作用）。

例如-

 final result1 = await Geolocator.getCurrentPosition().timeout( Duration(seconds: 10), onTimeout: () { ///you can throw TimeoutException("Location request timed out."); }, );

或者你可以通过 try and catch 以及 3 次重试来重试

喜欢：-`

///try this

    Future<Position> locateUser({int retries = 3}) async {
 
 try {Future<Position> locateUser({int retries = 3}) async {
  try {

    /// Trying to get the last known position of the user
    final result = await Geolocator.getLastKnownPosition(
        forceAndroidLocationManager: true);
    
    /// If we get a valid position
    if (result != null) {
      return result;
    }
    
    /// If no last known position of the user, get the current position of the user with a timeout
    final result1 = await Geolocator.getCurrentPosition().timeout(
      Duration(seconds: 10),
      onTimeout: () {
        throw TimeoutException("Location request timed out.");
      },
    );

    return result1;  // Return current position of user if successful
  } catch (e) {
    if (retries > 0) {
      print('Location request failed, retrying... ($retries retries left)');
      await Future.delayed(Duration(seconds: 2)); /// delay Wait before retrying
      return locateUser(retries: retries - 1); /// Retry with reduced count
    } else {
      print("Failed to get location after multiple attempts.");
      rethrow;  /// Throw the error if out of retries
    }
  }
}