androidx.media3.common.util.Assertions.checkState(Assertions.java:85)

Version

Media3 1.4.0

More version details

api("androidx.media3:media3-exoplayer:1.4.0")
api("androidx.media3:media3-session:1.4.0")
api("androidx.media3:media3-common:1.4.0")

Devices that reproduce the issue

Customized in-vehicle infotainment system, using Android 13.

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

No

Reproduction steps

1.My multimedia application uses exoPlayer internally, and there's a requirement to switch the player when changing audio sources. Therefore, I'm binding a player to the MediaLibrarySession using: MediaLibrarySession.Builder(this, switchablePlayer, this). The problem tends to occur when the internal audio source switches from Bluetooth to USB
update list to exoPlayer:

override fun onUsbPlaylistChanged(playlist: List<MediaItem>) {
    MediaLog.i(TAG, " onUsbPlaylistChanged playlist ${playlist.size}")
    currentMediaList.clear()
    currentMediaList.addAll(playlist)
    exoPlayer?.clearMediaItems()
    exoPlayer?.addMediaItems(currentMediaList)
}

2.when I need Play ，changing the internal player accordingly

fun switchPlayer(newSmartPlayer: SmartPlayer?) {
    MediaLog.d(TAG, "Switching player: ${currentSmartPlayer?.javaClass?.simpleName} → ${newSmartPlayer?.javaClass?.simpleName}")
    currentPlayer?.removeListener(forwardingListener)
    currentSmartPlayer = newSmartPlayer
    currentPlayer = newSmartPlayer?.getPlayer()
    currentPlayer?.addListener(forwardingListener)
    MediaLog.d(TAG, "Player switched, listeners: ${listeners.size}")
    currentPlayer?.currentMediaItem?.let { item ->
        mediaItemChangeCallback?.onMediaItemDataChange(item)
    }
}

3.This player switching is done within SwitchablePlayer.

I will call the play logic.

override fun playMediaByItem(mediaItem: MediaItem) {
    MediaLog.d(TAG, "playMediaByItem: ${mediaItem.mediaMetadata.title}")
    MediaLog.d(TAG, "playMediaByItem: ${mediaItem.mediaId}")
    val index = findMediaIndex(mediaItem)
    if (index >= 0) {
        playMediaAtIndex(index)
    } else {
        MediaLog.w(TAG, "Media not found in playlist: ${mediaItem.mediaId}")
    }
}

private fun playMediaAtIndex(index: Int) {
    if (index >= 0 && index < currentMediaList.size) {
        exoPlayer?.seekToDefaultPosition(index)
        exoPlayer?.prepare()
        exoPlayer?.play()
        MediaLog.d(TAG, "Playing media at index: $index")
    } else {
        MediaLog.w(TAG, "Invalid index: $index, playlist size: ${currentMediaList.size}")
    }
}

Expected result

The usb music media play successfully

Actual result

Playback crashes with the following stack trace
11-03 19:11:19.734  3824  3824 E AndroidRuntime: Process: com.smartlink.multimedia, PID: 3824
11-03 19:11:19.734  3824  3824 E AndroidRuntime: java.lang.IllegalStateException
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.common.util.Assertions.checkState(Assertions.java:85)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.PlayerInfo$Builder.build(PlayerInfo.java:381)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.PlayerInfo.copyWithTimeline(PlayerInfo.java:597)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.MediaUtils.mergePlayerInfo(MediaUtils.java:149)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.MediaControllerImplBase.onPlayerInfoChanged(MediaControllerImplBase.java:2715)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.MediaControllerStub.lambda$onPlayerInfoChangedWithExclusions$9(MediaControllerStub.java:258)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.MediaControllerStub$$ExternalSyntheticLambda13.run(Unknown Source:4)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.MediaControllerStub.lambda$dispatchControllerTaskOnHandler$14(MediaControllerStub.java:374)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at androidx.media3.session.MediaControllerStub$$ExternalSyntheticLambda6.run(Unknown Source:4)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:942)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at android.os.Looper.loopOnce(Looper.java:201)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at android.os.Looper.loop(Looper.java:288)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:8061)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:703)
11-03 19:11:19.734  3824  3824 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)ra

Media

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Bug Report

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