Xamarin.Forms android check whether user clicked Deny and Don't ask again

Issue

In my xamarin.forms app. I am using xamarin.Essentials to check and request permissions. I can check whether a permission is granted or not in android. The problem I am facing is when user clicks "Deny and Don't ask again" the status still shows Denied. How can we know whether user selected Deny and Dont ask so that I can show a warning message according to that. Any help is appreciated.

Solution

For check and request permission in Xamarin.Forms you could also use the plugin Permission.Plugin from nuget .

The option Deny and Don't ask again will only appear when you deny the request the second time . However , there is no such a specific status to tag it .

As a workaround , we could define a custom property to save the time that we deny .

int DenyCount = 0;

        private async void FabOnClick(object sender, EventArgs eventArgs)
        {
            var status = await CrossPermissions.Current.CheckPermissionStatusAsync<LocationPermission>();
            if (status != PermissionStatus.Granted)
            {
                if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.Location))
                {
                    //await DisplayAlert("Need location", "Gunna need that location", "OK");
                    DenyCount++;

                    if(DenyCount>=2)
                    {
                        //...
                    }

                }

                status = await CrossPermissions.Current.RequestPermissionAsync<LocationPermission>();
            }

            if (status == PermissionStatus.Granted)
            {
                //Query permission
                DenyCount = 0;  // reset the value of DenyCount
            }
            else if (status == PermissionStatus.Restricted)
            {
                //location denied
            }


        }

Answered By - Lucas Zhang - MSFT