Java.Lang.NoClassDefFoundError com.google.android.exoplayer2.source.ConcatenatingMediaSource

Question

I use Xamarin MediaManager version 1.2.2 to play songs in my Android and iOS applications: https://github.com/Baseflow/XamarinMediaManager

But the problem is that it is not working in every Android project. For example, it works in a new empty Android project and in another Android project I get the exception. But I used the same template to create both Android projects. I don't know why the same code is not working in every Android project. I have already tried to delete the bin and obj folders but it didn't helped.

I get this exception in the following line of code. This line is executed before I want to play a song.

CrossMediaManager.Current.RepeatMode = MediaManager.Playback.RepeatMode.Off;

Java.Lang.NoClassDefFoundError com.google.android.exoplayer2.source.ConcatenatingMediaSource

I use target Android version 33 and minimum Android version 31:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net7.0-android33.0</TargetFramework>
    <SupportedOSPlatformVersion>31.0</SupportedOSPlatformVersion>
    <OutputType>Exe</OutputType>
    <UseMaui>true</UseMaui>
    <UseMauiEssentials>true</UseMauiEssentials>
...

Why am I getting the exception in one Android project and not in the other?

Answer 1

Hello,

XamarinMediaManager is a third-party control. I notice you have opened an issue about Java.Lang.NoClassDefFoundError com.google.android.exoplayer2.source.ConcatenatingMediaSource in version 1.2.2 in the GitHub, please waiting for update in the XamarinMediaManager github page.

I notice you use MAUI, you can use MediaElement to play audio and video in iOS and Android.

Best Regards,

Leon Lu

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