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flutter - 如何在颤振中使用 geoLocator 包在控制台上打印当前位置？

问题描述

这是我在 loading_screen.dart 文件中的代码。我已经明确提到要打印我的位置，甚至在 onpressed 中调用了该方法。仍然没有任何回应。

import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';

class LoadingScreen extends StatefulWidget {
  @override
  _LoadingScreenState createState() => _LoadingScreenState();
}

class _LoadingScreenState extends State<LoadingScreen> {

    void getLocation() async{
    Position position = await Geolocator.getCurrentPosition(desiredAccuracy: LocationAccuracy.low);
    print(position);
    }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: RaisedButton(
          onPressed: () {
            getLocation();
          },
          child: Text('Get Location'),
        ),
      ),
    );
  }
}

标签： flutterdartlocationemulation

解决方案

您的实施中缺少几个步骤。

首先你需要检查权限，如果允许，获取位置，否则请求权限。

您还需要在清单中为 android 和在 info.plist 中为 ios 添加权限

示例代码： -

import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Test(),
    );
  }
}

class Test extends StatefulWidget{
  @override
  _Test createState() => _Test();
}

class _Test extends State<Test>{

  void getLocation() async{
    LocationPermission permission = await Geolocator.checkPermission();
    if(permission == LocationPermission.always || permission == LocationPermission.whileInUse) {
      printLocation();
    }else{
      requestPermission();
    }
  }

  requestPermission() async{
    LocationPermission permission = await Geolocator.requestPermission();
    if(permission == LocationPermission.always || permission == LocationPermission.whileInUse) {
      printLocation();
    }else{
      requestPermission();
    }
  }

  printLocation() async{
    Position position = await Geolocator.getCurrentPosition(desiredAccuracy: LocationAccuracy.low, timeLimit: Duration(seconds: 10));
    print(position);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: RaisedButton(
          onPressed: () {
            getLocation();
          },
          child: Text('Get Location'),
        ),
      ),
    );
  }
}

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