media3-cast-integration

Add the androidx.media3:media3-cast dependency (1.9.0+), declare DefaultCastOptionsProvider in your manifest, then build a CastPlayer with ExoPlayer as the local player inside a MediaSessionService and pass it to MediaSession.Builder.

Add Media3 Cast dependencies first while keeping legacy dependencies to avoid compilation errors, replace forwarding player wrappers with CastPlayer, and swap CastButtonFactory for MediaRouteButtonFactory. Remove legacy files only when explicitly requested.

CastPlayer manages both local and remote playback and is the default choice. RemoteCastPlayer only handles remote playback and requires a SessionAvailabilityListener to transfer playback state between the local ExoPlayer and the Cast session.

Yes, Media3 Cast provides a MediaRouteButton composable in the androidx.media3.cast package for Compose UIs. You should use the Material3 Player composable instead of PlayerSurface and force recomposition on DeviceInfo changes.

PlayerView does not rebind the video surface when playback moves between local and remote devices. Fix it by listening for onDeviceInfoChanged and resetting playerView.player to null before reassigning the controller.

Jetpack Media3 version 1.9.0 or higher is required because Cast is not available in lower versions. All Media3 dependencies such as media3-exoplayer, media3-session, and media3-cast must use the same version.