扑朔迷离ERROR_ALREADY_REQUESTING_PERMISSIONS [英] ERROR_ALREADY_REQUESTING_PERMISSIONS on flutter

问题描述

我创建了一个带有flutter的android应用程序，我在应用程序运行时第一次创建了权限请求，因此当用户单击拒绝"然后单击登录"按钮时，再次请求权限.我遇到了这个错误

I create an android app with flutter, I create permission request at the first time when app is run, so when user click deny and then click login button, permission requested again. I got this error

Exception has occurred.
PlatformException (PlatformException(ERROR_ALREADY_REQUESTING_PERMISSIONS, A request for permissions is already running, please wait for it to finish before doing another request (note that you can request multiple permissions at the same time)., null))

这是我的代码

@override
  void initState() {
    this.setSharedPreferences();
    PermissionHandler().checkPermissionStatus(PermissionGroup.location).then(_checkPermission);
  }

void _checkPermission(PermissionStatus status){
    if(status == PermissionStatus.unknown || status == PermissionStatus.denied){
      _askPermission();
    }
  }

void _askPermission() async{
    await PermissionHandler().requestPermissions([PermissionGroup.location]);
  }

void onLogin() async {
   PermissionStatus locationPermission = await PermissionHandler().checkPermissionStatus(PermissionGroup.location);
   if(locationPermission == PermissionStatus.denied || locationPermission == PermissionStatus.unknown){
        _askPermission();
   }else{
     // user available to login
   }
}

如何处理?谢谢你的回答

How to handle this? thanks for your answer

推荐答案

问题是，当检查权限时，它将返回null而不是任何Permission状态，这将导致异常.可能是一个错误，导致多个人填补了与位置权限相关的问题.

The thing is when it checks for permission it returns null instead of any of the Permission status, which results in a exception. It could possibly a bug multiple people have filled issues related to Location permission.

https://github.com/BaseflowIT/flutter-geolocator/issues/172

https://github.com/BaseflowIT/flutter-geolocator/issues/

https://github.com/BaseflowIT/flutter-permission-handler/issues

void getPermissionStatus() async {
        PermissionStatus permission = await PermissionHandler()
            .checkPermissionStatus(PermissionGroup.storage);
        if (permission == PermissionStatus.granted) {
        } // ideally you should specify another condition if permissions is denied
else if (permission == PermissionStatus.denied ||
            permission == PermissionStatus.disabled ||
            permission == PermissionStatus.restricted) {
          await PermissionHandler().requestPermissions([PermissionGroup.storage]);
          getPermissionStatus();
        }
      }

我认为您的代码没有问题，您可以使用递归而不是创建两个单独的函数.

I don't think there is problem with your code anyway you can use recursion instead of creating two separate functions.

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