如何在flutter中获取用户当前位置地址

Question

我想自动显示用户地址的当前位置。
flutter中如何获取用户当前位置？

当我尝试运行示例程序时，它向我显示错误为

[错误：flutter/shell/platform/android/platform_view_android_jni.cc(40)] java.lang.NoClassDefFoundError：解析失败：Landroid/support/v4/util/ArraySet；

Answer 1

我正在使用 [地理定位器][1] 来获取纬度、经度

Future getLocation() async {
  bool serviceEnabled;
  LocationPermission permission;
  // Test if location services are enabled.
  serviceEnabled = await Geolocator.isLocationServiceEnabled();
  if (!serviceEnabled) {
    // Location services are not enabled don't continue
    // accessing the position and request users of the
    // App to enable the location services.
    await Geolocator.openLocationSettings();

    return Future.error('Location services are disabled.');
  }
  permission = await Geolocator.checkPermission();
  if (permission == LocationPermission.denied) {
    permission = await Geolocator.requestPermission();
    if (permission == LocationPermission.denied) {
      return Future.error('Location permissions are denied');
    }
  }
  if (permission == LocationPermission.deniedForever) {
    // Permissions are denied forever, handle appropriately.
    return Future.error(
        'Location permissions are permanently denied, we cannot request permissions.');
  }
  // When we reach here, permissions are granted and we can
  // continue accessing the position of the device.

  Position pos = await Geolocator.getCurrentPosition(
          desiredAccuracy: LocationAccuracy.high)
      .timeout(const Duration(seconds: 15), onTimeout: () {
    return Future.error(
        'Error fetching current location \nplease check Network and Location');
  });
  log("${pos.latitude}__${pos.longitude}");
  return pos;
}

并通过[地理编码][2]获取地址

Future getAddress(lat, long) async {
  List<Placemark> address = [];
  try {
    address =
        await placemarkFromCoordinates(double.parse(lat), double.parse(long));
  } catch (e, stackTrace) {
    address = [];
    Components.loggerStackTrace(e, stackTrace);
  }

  String loc = "";

  for (var element in address) {
    loc = '$loc${element.name}${element == address.last ? "" : ","}';
  }
  log(loc);
  return loc;
}

从loc你可以得到地址 [1]：https://pub.dev/packages/geolocator [2]：https://pub.dev/packages/geocoding