internal static void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
{
PermissionsRequestCode code = (PermissionsRequestCode)requestCode;
TaskCompletionSource <bool[]> completitionSource = requestCodeToCompletitionSource[code];
requestCodeToCompletitionSource.Remove(code);
bool[] results = new bool[grantResults.Length];
for (int i = 0; i < grantResults.Length; i++)
{
results[i] = grantResults[i] == Permission.Granted;
}
completitionSource.SetResult(results);
}
private async static Task <bool> RequestAccessPermission(PermissionsRequestCode permissionCode, string[] permissions)
{
if (Activity == null)
{
throw new ArgumentNullException(nameof(Activity));
}
List <string> permissionsToRequest = new List <string>();
for (int i = 0; i < permissions.Length; i++)
{
string permission = permissions[i];
if (Activity.CheckSelfPermission(permission) != Permission.Granted)
{
permissionsToRequest.Add(permission);
}
}
if (permissionsToRequest.Count == 0)
{
return(true);
}
if (requestCodeToCompletitionSource.ContainsKey(permissionCode))
{
return(false);
}
TaskCompletionSource <bool[]> completitionSource = new TaskCompletionSource <bool[]>();
requestCodeToCompletitionSource[permissionCode] = completitionSource;
Activity.RequestPermissions(permissionsToRequest.ToArray(), (int)permissionCode);
bool[] results = await completitionSource.Task;
for (int i = 0; i < results.Length; i++)
{
if (!results[i])
{
return(false);
}
}
return(true);
}
