[BUG] MediaElement Android video player throws exception

[xiufengpeng]

Is there an existing issue for this?

• I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

in .net 9 maui, upgraded to the latest nuget packages as of today (27 Jan. 2025), MediaLElement version 6.0.0
When load the video player on Android (API 22), the following error threw:

Could not determine Java type corresponding to AndroidX.Media3.ExoPlayer.IExoPlayerInvoker, Xamarin.AndroidX.Media3.ExoPlayer, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null. (Parameter 'targetType')

Expected Behavior

Video player worked fine prior to the nuget upgrades, video will play in the mediaElement. The new community toolkit nuget package broke the video player.

Steps To Reproduce

in. net 9 with all the latest nuget packages,

1. Create a Xaml PAGE with the mediaElement instance.
2. Set the mediaElement source video to a local video.
3. When the page load, the exception throws

Link to public reproduction project repository

na

Environment

- .NET MAUI CommunityToolkit: latest nuget package as 27 Jan 2025
- .Net 9
- .on Android API 31

Anything else?

The problem only happens on Android verison.

[ne0rrmatrix]

Breaking change with dotnet 9 was the minimum version of android API as 26 for media element. Please update min version to 26. That should fix the issue.

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On Wed, Jan 29, 2025, 19:33 Peng ***@***.***> wrote: Is there an existing issue for this? - I have searched the existing issues Did you read the "Reporting a bug" section on Contributing file? - I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug Current Behavior in .net 9 maui, upgraded to the latest nuget packages as of today (27 Jan. 2025), MediaLElement version 6.0.0 When load the video player on Android (API 22), the following error threw: Could not determine Java type corresponding to AndroidX.Media3.ExoPlayer.IExoPlayerInvoker, Xamarin.AndroidX.Media3.ExoPlayer, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null. (Parameter 'targetType') Expected Behavior Video player worked fine prior to the nuget upgrades, video will play in the mediaElement. The new community toolkit nuget package broke the video player. Steps To Reproduce in. net 9 with all the latest nuget packages, 1. Create a Xaml PAGE with the mediaElement instance. 2. Set the mediaElement source video to a local video. 3. When the page load, the exception throws Link to public reproduction project repository na Environment - .NET MAUI CommunityToolkit: latest nuget package as 27 Jan 2025- .Net 9- .on Android API 22 Anything else? The problem only happens on Android verison. — Reply to this email directly, view it on GitHub <#2480>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA7ZRN6G44LY725SCA6K6ZD2NGMPZAVCNFSM6AAAAABWEJWWS6VHI2DSMVQWIX3LMV43ASLTON2WKOZSHAYTSOBSGEYDKNY> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[Brosten]

I'm having the same issue.
Doesn't help to set minimum target to 26. (Tried with 28 as well, but no luck).
It worked fine with .NET 9 and MediaElement 5.0. (Minimum Android version 24).
But when I updated to MediaElement 6.0, the issue came. And changing android minimum doesn't seem to help.

[xiufengpeng]

@ne0rrmatrix Sorry I had a typo in my report, the Android phone API is actually 31, not 22.

[xiufengpeng]

@ne0rrmatrix here are the steps to reproduce the issue:

1. Using VS2022, choose .net 9.0-Android setup for both debug and release
2. Install or upgrade communityToolKit mediaElement to the latest version 6.0.0
3. create a XAML content page with an mediaElement videoplayer
4. plug in Android phone with API 31 (mine is LGE-LM 850)
5. in the backend code, set the source of vdieoplayer to a file on the phone (any video file)
6. The java exception above throws when the screen of this XAML page loads

Some additional info:

1. All other communitytoolit nuget packages are up to date as of today, e.g. CommunityToolkit.maui is version 11.0.0
2. The mediaElement previous version 5.0.0 works fine as @Brosten pointed out, if I downgrade it to version 5.0.0, it works for me too.

[ne0rrmatrix]

Please provide a sample repo with a dotnet maui project using media element which can show us the bug. Without a reproduction it is very difficult for us to know what the issue is.

[xiufengpeng]

@ne0rrmatrix I understand the sample repo would help and I would if I could. But my repo is private and I am using a physical android phone. The steps I described above can produce the error straight-forward, and I have tested on the lower version 5.0.0 which works fine, the error is happening after upgrading to 6.0.0. @Brosten has the exact same observation too as described above

[ne0rrmatrix]

A sample repo is easy to do. You create a maui app and add media element. You set the conditions that reproduce the bug. At the moment if I create a sample app it works. So I need to know how you are configuring things to have it not work.

[Brosten]

I tried to reproduce it in a clean project, but hasn't been able to, so far.
Tried with embedded, external (http) and video from device storage. All works.
My real app uses a Flyout page, so I also tried with that, but seemed to work as well.

So.... something differs between the setup on my real app and the clean repo.. .I just need to figure out what.

[dhindrik]

I created this repo, https://github.com/dhindrik/AndroidMediaElementBug, and I get the exception on startup. Tested on OnePlus GM1913 Android 12, API 31

[xiufengpeng]

@dhindrik , Awesome! @ne0rrmatrix, can you use this repo from @dhindrik ?

[ne0rrmatrix]

I looked at that repo. The android manifest needs to be updated to have the service, and the appropriate prmissions. Otherwise the app will not work. Look here: https://learn.microsoft.com/en-us/dotnet/communitytoolkit/maui/views/mediaelement?tabs=android and scroll down to platform specific initialization. That provides the info you need to configure your maui app for media element.

[xiufengpeng]

I just updated the manifest file and still going the same exception after upgrading to 6.0.0.0. The commented out section was the previous settings. I will try to create a sample repo soon

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