maui: Externally hosted images cannot load on native apps

Description

Loading an hosted image into an image control doesn’t work after upgrading to RC1. I thought it would be the same as #5986, but I’m using native maui controls, no webview and getting an other error message.

Steps to Reproduce

Create a new MAUI app.
Add <uses-permission android:name="android.permission.INTERNET" /> to the android manifest.
Change the source of the existing image control to: https://devblogs.microsoft.com/dotnet/wp-content/uploads/sites/10/2020/10/dotnet-bot_handybot.png
Image does not show up on android, neither in the emulator, nor directly in an deployed app. Couldn’t find an error message either.
If I load the image from code-behind img.Source = ImageSource.FromUri(new Uri("https://devblogs.microsoft.com/dotnet/wp-content/uploads/sites/10/2020/10/dotnet-bot_handybot.png")); , it breaks with an error message: **System.InvalidOperationException:** 'An attempt was made to transition a task to a final state when it had already completed.'

Version with bug

Release Candidate 1 (current)

Last version that worked well

Preview 14

Affected platforms

Android

Affected platform versions

Android 11+

Did you find any workaround?

No response

Relevant log output

at System.Threading.Tasks.TaskCompletionSource`1[[Microsoft.Maui.IImageSourceServiceResult, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetResult(IImageSourceServiceResult result)
   at Microsoft.Maui.ImageLoaderCallback.OnComplete(Boolean success, Drawable drawable, IRunnable dispose) in D:\a\_work\1\s\src\Core\src\ImageSources\Android\ImageLoaderCallback.cs:line 88
   at Microsoft.Maui.IImageLoaderCallbackInvoker.n_OnComplete_Ljava_lang_Boolean_Landroid_graphics_drawable_Drawable_Ljava_lang_Runnable_(IntPtr jnienv, IntPtr native__this, IntPtr native_p0, IntPtr native_p1, IntPtr native_p2) in D:\a\_work\1\s\src\Core\src\obj\Release\net6.0-android\generated\src\Microsoft.Maui.IImageLoaderCallback.cs:line 87
   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPLLL_V(_JniMarshal_PPLLL_V callback, IntPtr jnienv, IntPtr klazz, IntPtr p0, IntPtr p1, IntPtr p2) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:line 297

About this issue

Original URL
State: closed
Created 2 years ago
Reactions: 4
Comments: 24 (7 by maintainers)

Most upvoted comments

Works in main now - fixed by #6394 Screenshot_1650659119

Redth on Apr 22, 2022

I don’t believe it would have made rc2.

Redth on Apr 26, 2022

Hey,

In case it helps , here is a somewhat ugly workaround until the fix is released:

ImageHandler.Mapper.AppendToMapping(nameof(ImageView.Drawable), async (handler, view) =>
{
    if (view.Source is UriImageSource uriImageSource)
        try
        {
            byte[] imageData;
            using (var response = await _httpClient.GetAsync(uriImageSource.Uri))
            {
                imageData = await response.Content.ReadAsByteArrayAsync();
            }
            handler.PlatformView.SetImageDrawable(new BitmapDrawable(BitmapFactory.DecodeByteArray(imageData, 0, imageData.Length)));
        }
        catch
        {
        }
    ;
});

icarrenomercado on May 8, 2022

I have an app which downloads the image, stores it locally and then displays the image. That app stopped working with RC1. Maybe it has something to do with external PNG images being loaded at runtime. All this on an Android. I checked and the image is actually downloaded and stored locally. The image just doesn’t appear.

davefxy on Apr 15, 2022

Got the same problem with a native android app. demo: MauiApp9.zip on windows it is ok: Android 11:

kristinx0211 on Apr 14, 2022

I am experiencing this same issue. The collection view with internet images loads but after a while I get the exception above.

emorell96 on Apr 13, 2022