Xamarin Forms throws Plugin.Media.Abstractions.MediaPermissionException while taking photo - xamarin

Question

I am trying to capture an image/pick up an image from gallery in Xamarin Forms app. I have installed the nuget manager > Birdie.MediaPlugin. During On click on the button in the Register page throws below error;
Plugin.Media.Abstractions.MediaPermissionException: <Timeout exceeded getting exception details Could someone please advise where should we add persmission in Xamarin.Forms app ?
// Register.xaml:
<Image x:Name="imageDisplay" />
<Button x:Name="uploadButton"
Text="Upload Image" Clicked="UploadButton_Clicked"/>
// PlayerDetails.cs
public ImageSource Source { get; internal set; }
//Register.xaml.cs
PlayerDetails myDetails;
public Register(PlayerDetails playD)
{
InitializeComponent();
BindingContext = myDetails;
}
private async void UploadButton_Clicked(object sender, EventArgs e)
{
//myDetails.Image = new Image();
if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
{
await DisplayAlert("No Camera", ":( No camera avaialble.", "OK");
return;
}
var status = await GetPermissions();
if(status == true)
{
var file = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
{
Directory = "Sample",
Name = "flower1.jpg"
});
if (file == null)
return;
await DisplayAlert("File Location", file.Path, "OK");
myDetails.Source = ImageSource.FromStream(() =>
{
var stream = file.GetStream();
file.Dispose();
return stream;
});
}
else
{
await DisplayAlert("Permissions Denied", "Unable to take photos.", "OK");
//On iOS you may want to send your user to the settings screen.
if (Device.RuntimePlatform == Device.iOS)
CrossPermissions.Current.OpenAppSettings();
}
}
//I have split the permission function as below;
public static async Task<bool> GetPermissions()
{
bool permissionsGranted = true;
var permissionsStartList = new List<Permission>()
{
Permission.Location,
Permission.LocationAlways,
Permission.LocationWhenInUse,
Permission.Storage,
Permission.Camera
};
var permissionsNeededList = new List<Permission>();
try
{
foreach (var permission in permissionsStartList)
{
var status = await CrossPermissions.Current.CheckPermissionStatusAsync(permission);
if (status != PermissionStatus.Granted)
{
permissionsNeededList.Add(permission);
}
}
}
catch (Exception ex)
{
Console.WriteLine("Nice, exception! " + ex);
}
var results = await CrossPermissions.Current.RequestPermissionsAsync(permissionsNeededList.ToArray());
try
{
foreach (var permission in permissionsNeededList)
{
var status = PermissionStatus.Unknown;
//Best practice to always check that the key exists
if (results.ContainsKey(permission))
status = results[permission];
if (status == PermissionStatus.Granted || status == PermissionStatus.Unknown)
{
permissionsGranted = true;
}
else
{
permissionsGranted = false;
break;
}
}
}
catch (Exception ex)
{
Console.WriteLine("Last, exception! " + ex);
}
return permissionsGranted;
}

Answer 1

You can update your OnClick event code to add the permissions logic as well:
var cameraStatus = await CrossPermissions.Current.CheckPermissionStatusAsync<CameraPermission>();
var storageStatus = await CrossPermissions.Current.CheckPermissionStatusAsync<StoragePermission>();
if (cameraStatus != PermissionStatus.Granted || storageStatus != PermissionStatus.Granted)
{
cameraStatus = await CrossPermissions.Current.RequestPermissionAsync<CameraPermission>();
storageStatus = await CrossPermissions.Current.RequestPermissionAsync<StoragePermission>();
}
if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
{
await DisplayAlert("No Camera", ":( No camera avaialble.", "OK");
return;
}
if (cameraStatus == PermissionStatus.Granted && storageStatus == PermissionStatus.Granted)
{
var file = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
{
Directory = "Sample",
Name = "flower1.jpg"
});
if (file == null)
return;
await DisplayAlert("File Location", file.Path, "OK");
myDetails.Source = ImageSource.FromStream(() =>
{
var stream = file.GetStream();
file.Dispose();
return stream;
});
}
else
{
await DisplayAlert("Permissions Denied", "Unable to take photos.", "OK");
//On iOS you may want to send your user to the settings screen.
if (Device.RuntimePlatform == Device.iOS)
CrossPermissions.Current.OpenAppSettings();
}
Note:It will become a long function so I recommend breaking it up into different functions.