打开定位服务而不导航到设置页面？飞镖

Posted 2023-04-14

【中文标题】打开定位服务而不导航到设置页面？飞镖

【英文标题】：Turn on location services without navigating to settings page ? Flutter Dart

【发布时间】：2019-06-21 05:01:45

【问题描述】：

我们正在从 Flutter 迁移。我们用这个线程来Turn on location services without navigating to settings page

这在 Flutter 中如何实现？

导航到设置的当前临时代码：

  Future _getCurrentLocation() async 
    Position position;
    try 
      position = await Geolocator().getCurrentPosition(
          desiredAccuracy: LocationAccuracy.bestForNavigation);
     on PlatformException catch(e)
      print(e.code);
      if(e.code =='PERMISSION_DISABLED')
        print('Opening settings');
        await openLocationSetting();
        try 
          position = await Geolocator().getCurrentPosition(
              desiredAccuracy: LocationAccuracy.bestForNavigation);
         on PlatformException catch(e)
          print(e.code);
        
      
    

    setState(() 
//      _center = LatLng(currentLocation['latitude'], currentLocation['longitude']);
      _center = LatLng(position.latitude, position.longitude);
    );
  
  Future openLocationSetting() async 
    final androidIntent intent = new AndroidIntent(
      action: 'android.settings.LOCATION_SOURCE_SETTINGS',
    );
    await intent.launch();

  

【问题讨论】：

查看simple_permissions 包。

【参考方案1】：

在屏幕主体中添加地图

@override
  Widget build(BuildContext context) 
    return Scaffold(
        body: Builder(
          builder: (context) => Stack(
            children: [
              GoogleMap(
                scrollGesturesEnabled: true,
                tiltGesturesEnabled: true,
                rotateGesturesEnabled: true,
                mapToolbarEnabled: true,
                mapType: MapType.normal,
                onTap: _placeMarker,
                onMapCreated: _onMapCreated,
                markers: Set.from(myMarker),
                initialCameraPosition: CameraPosition(
                  target: _center,
                  zoom: 5.0,
                ),
              ),
              Padding(
                padding: (EdgeInsets.symmetric(horizontal: 16, vertical: 40)),
                child: Align(
                  alignment: Alignment.topRight,
                  child: Column(
                    children: [
                      CircleAvatar(
                        radius: 30,
                        child: IconButton(
                          onPressed: () 
                            navigate(context);
                          ,
                          icon: Icon(
                            Icons.done,
                            color: Colors.white,
                          ),
                        ),
                      ),
                      SizedBox(
                        height: 10,
                      ),
                      CircleAvatar(
                        radius: 30,
                        child: IconButton(
                          onPressed: **getLocation**,
                          icon: Icon(
                            Icons.location_on,
                            color: Colors.white,
                          ),
                        ),
                      )
                    ],
                  ),
                ),
              ),
              Padding(
                padding: (EdgeInsets.symmetric(horizontal: 16, vertical: 40)),
                child: Align(
                  alignment: Alignment.topLeft,
                  child: Column(
                    children: [
                      CircleAvatar(
                        radius: 30,
                        child: IconButton(
                          onPressed: () 
                            Navigator.pop(context);
                          ,
                          icon: Icon(
                            Icons.chevron_left,
                            color: Colors.white,
                          ),
                        ),
                      ),
                      SizedBox(
                        height: 10,
                      ),
                    ],
                  ),
                ),
              )
            ],
          ),
        ));
  


  getLocation() async 
    position = await Geolocator.getCurrentPosition(
        desiredAccuracy: LocationAccuracy.high);
    print(position);
    mapController.animateCamera(CameraUpdate.newCameraPosition(CameraPosition(
        target: LatLng(position.latitude, position.longitude),
        zoom: 18,
        tilt: 36)));
  

此代码将在主屏幕中初始化谷歌地图，如果位置被关闭，则会弹出一个警告框询问权限，然后它将自动打开

【参考方案2】：

您可以使用location 包，您只需在您的AndroidManifest.xml 和Info.plist 文件中添加所需的权限，将在弹出窗口中询问权限。

【讨论】：

启用位置权限和位置服务是两件事