Support loading local videos in the `assets` directory of Android

[marioortizmanero]

On iOS I can access the bundle assets because the files are copied as-is into the application bundle and live on the device’s file-system:

        val videoFilePath = NSBundle.mainBundle.pathForResource(item, null)
        PlatformFile(videoFilePath ?: "")

But this doesn't work with Android. I have a file in assets/video.mp4 I'd like to use, and otherwise I have to copy the file, which is bad for performance (especially since I'm showing a splash screen video...).

Thank you for the work!

[kdroidFilter]

Yes, you are right, this feature is absolutely necessary, I will try to support it as soon as possible.

[kdroidFilter]

This is now resolved in #196 with a new openAsset() API.

How to use:

Android — Place your video in src/main/assets/ or src/androidMain/assets/:

playerState.openAsset("video.mp4")
playerState.openAsset("videos/intro.mp4")  // subdirectories work too

ExoPlayer natively supports the asset:/// URI scheme, so playback is zero-copy directly from the APK.

iOS — Add files to the app bundle, then:

playerState.openAsset("video.mp4")

The API resolves the file via NSBundle.mainBundle.pathForResource().

Implementation

• Common interface: openAsset(fileName: String) with a default implementation that throws UnsupportedOperationException on unsupported platforms
• Android: delegates to openUri("asset:///$fileName")
• iOS: resolves via NSBundle and calls openUri()
• Other platforms: throw UnsupportedOperationException (can be extended later)

This eliminates the need for file copying on Android and iOS while keeping the door open for other platforms.