name: android-media description: Android media — Media3/ExoPlayer, CameraX, image loading, audio focus, PiP. user-invocable: true

Android Media

Cross-cutting skill — always activates alongside the project-type-specific skill.

Hard Rules

• •Use Media3 (androidx.media3) — ExoPlayer is now part of Media3.
• •Use CameraX for camera features — not deprecated Camera or Camera2 directly.
• •Use Coil (Compose-first) or Glide for image loading — not manual bitmap management.
• •Request and manage audio focus before playback — respect other apps.
• •Release media resources (player, camera) when the lifecycle component stops.
• •Handle audio becoming noisy (headphone disconnect) — pause playback.
• •Use MediaSession for background playback — required for media notification controls.
• •Never decode large bitmaps on the main thread — use image loading libraries.
• •Request camera/microphone permissions before accessing hardware.
• •Support Picture-in-Picture only for video playback activities.

Core Patterns

• •Bind Media3 player to lifecycle with LifecycleOwner-aware setup.
• •Use CameraX with lifecycle binding — CameraProvider.bindToLifecycle().
• •Configure Coil with disk cache, memory cache, and crossfade for smooth UX.
• •Implement MediaSessionService for background audio playback.
• •Use ExoPlayer caching (SimpleCache) for streaming content.
• •Handle all player states: idle, buffering, ready, ended, error.

References

• •references/media3_playback.md
• •references/camerax.md
• •references/image_loading.md
• •references/audio_focus.md
• •references/picture_in_picture.md
• •references/camera_extensions.md