我使用 flutter 创建一个 android 应用程序,在应用程序运行时第一次创建权限请求,因此当用户单击拒绝然后单击登录按钮时,会再次请求权限。我收到这个错误
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
}
}
这要怎么处理呢?感谢您的回答
问题是,当它检查权限时,它返回 null 而不是任何权限状态,这会导致异常。这可能是一个错误,多人填写了与位置权限相关的问题。
https://github.com/BaseflowIT/flutter-geolocator/issues/172 https://github.com/BaseflowIT/flutter-geolocator/issues/172
https://github.com/BaseflowIT/flutter-geolocator/issues/ https://github.com/BaseflowIT/flutter-geolocator/issues/
https://github.com/BaseflowIT/flutter-permission-handler/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();
}
}
我不认为你的代码有问题,无论如何你可以使用递归而不是创建两个单独的函数。
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