# media3-cast-integration

Adds Google Cast capabilities to Android projects using Jetpack Media3. It configures dependencies, manifest entries, CastPlayer or RemoteCastPlayer, and Compose UI controls.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 771 installs · ★ 9764
- Author: Google LLC
- License: Apache-2.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/android/skills/tree/HEAD/media/media3-cast-integration/SKILL.md
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/skills/media3-cast-integration

## What it does

This skill guides coding agents through setting up Google Cast with Jetpack Media3. It adds the required `androidx.media3:media3-cast` artifact alongside `media3-exoplayer` and `media3-session`. When migrating away from the legacy Cast SDK, it replaces custom forwarding wrappers around `RemoteMediaClient` while keeping old dependencies in place until migration finishes.

Manifest setup includes registering `DefaultCastOptionsProvider` and declaring `INTERNET` access. Inside `MediaSessionService`, the agent initializes `ExoPlayer` together with `CastPlayer` by default. For remote-only workflows, it wires `RemoteCastPlayer` and uses `PlayerTransferState` within a `SessionAvailabilityListener` to swap playback between local and cast devices. In Jetpack Compose, it renders `MediaRouteButton` directly without embedding legacy `AndroidView` wrappers.

Jetpack Media3 must be version `1.9.0` or higher because earlier releases lack Cast modules.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add android/skills --skill media3-cast-integration -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/media3-cast-integration/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/media3-cast-integration/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add android/skills --skill media3-cast-integration -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/media3-cast-integration/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add android/skills --skill media3-cast-integration -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/media3-cast-integration/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install android/skills media3-cast-integration
```

2. **Manually: put the files in place**
- File: `.github/skills/media3-cast-integration/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add android/skills --skill media3-cast-integration -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/android/skills --path media/media3-cast-integration
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/media3-cast-integration/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add android/skills --skill media3-cast-integration -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/android/skills/tree/HEAD/media/media3-cast-integration/SKILL.md

## When to use it
- integrate Google Cast into Android apps with Jetpack Media3
- migrate away from the legacy Google Cast SDK without breaking builds
- wire CastPlayer or RemoteCastPlayer inside MediaSessionService
- embed MediaRouteButton in Jetpack Compose playback controls

## Example prompts
- Set up Google Cast playback in my Android app using Jetpack Media3
- Migrate this legacy Cast SDK implementation to Media3 CastPlayer
- Add a Cast MediaRouteButton to the Compose player UI

## Source text · SKILL.md · Apache-2.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: e86af96f84cb6672.

BEGIN THIRD-PARTY FILE e86af96f84cb6672
```text
---
name: media3-cast-integration
description: Implements Google Cast support in Android apps using Jetpack Media3.
  Handles adding build dependencies, updating manifest, configuring OptionsProvider,
  and managing CastPlayer or RemoteCastPlayer for playback in both Compose and View-based
  UIs. Use when adding Cast functionality or migrating from legacy Cast SDK to Media3
  Cast.
license: Complete terms in LICENSE.txt
metadata:
  author: Google LLC
  last-updated: '2026-10-22'
  keywords:
  - Android
  - Media3
  - Cast
  - Integration
  - Migration
  - ExoPlayer
  - MediaSession
  - Jetpack Media3
---

## Prerequisites

- Jetpack Media3 version must be `>= 1.9.0`. Cast isn't available in lower versions.

## Glossary

- **`CastPlayer`** : Media3 `Player` that controls playback on both local and remote Cast devices.
- **`RemoteCastPlayer`** : Media3 `Player` that communicates with a Cast receiver, only used for remote playback.
- **Google Cast SDK**: Legacy casting SDK in maintenance mode, superseded by Jetpack Media3.
- **`OptionsProvider`** : Interface providing configuration options to initialize GMS `CastContext`.

## Common guidelines

- Legacy [Google Cast SDK](https://developers.google.com/cast) is in maintenance mode.
- For new Cast setups:
  - You must use [Jetpack Media3 Cast](references/android/media/media3/cast/index.md).
  - You mustn't use legacy Cast SDK unless explicitly requested.

## Step 1: Set up dependencies

To complete this step, you **MUST** ensure the following:

- In the app-level build file, declare the `media3-cast` dependency version
  1.9.0 or higher.

      implementation("androidx.media3:media3-cast:1.11.1")

- Ensure required Media3 dependencies are present:

  - `androidx.media3:media3-exoplayer`
  - `androidx.media3:media3-session`
  - `androidx.media3:media3-ui-compose`
- If the application uses legacy Views, add `media3-ui`.

- Enforce the same versions across all Media3 dependencies.

- Use configurations in "Add build dependencies" section of [Getting started
  with CastPlayer](references/android/media/media3/cast/create-castplayer.md) as the source of
  truth.

- **For apps without an existing Cast integration:**

  - Verify legacy Cast SDK (`libs.play.services.cast.framework`) is absent.
- **If Migrating from Legacy Cast SDK:**

  - Add Media3 Cast dependencies first.
  - Keep existing legacy dependencies untouched at this stage to prevent compilation errors.

## Step 2: Update the manifest

To complete this step, you **MUST** ensure the following:

- Inside the manifest's `<application>` tag, declare the Cast options provider.
```
END THIRD-PARTY FILE e86af96f84cb6672

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