Android Cast应用程序是基于发送者-接收者模型构建的，因此它需要具有发送者和接收者组件。发送者组件将负责将媒体传输到接收者组件。

下面是一个简单的示例，演示如何实现Android Cast发送者和接收者的功能。这个示例基于Google Cast SDK。

发送者（Sender）代码示例：

GoogleApiClient mApiClient;
MediaMetadata mediaMetadata;
MediaInfo mediaInfo;

/*初始化GoogleApiClient，在Activity的onCreate()方法中调用*/
public void initApiClient(Context context) {
    mApiClient = new GoogleApiClient.Builder(context)
            .addApi(Cast.API)
            .addConnectionCallbacks(new GoogleCastConnectionCallbacks())
            .build();
    mApiClient.connect();
}

private class GoogleCastConnectionCallbacks implements GoogleApiClient.ConnectionCallbacks {

    @Override
    public void onConnected(Bundle bundle) {
        try {
            Cast.CastApi.launchApplication(mApiClient, APP_ID).setResultCallback(new ResultCallback() {
                @Override
                public void onResult(ApplicationConnectionResult result) {
                    if (result.getStatus().isSuccess()) {
                        //应用程序成功启动
                        loadRemoteMedia();
                    }
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onConnectionSuspended(int i) {

    }
}

private void loadRemoteMedia() {
    mediaMetadata = new MediaMetadata(MediaMetadata.MEDIA_TYPE_MUSIC_TRACK);
    mediaMetadata.putString(MediaMetadata.KEY_ARTIST, "艺术家名字");
    mediaMetadata.putString(MediaMetadata.KEY_TITLE, "标题");

    mediaInfo = new MediaInfo.Builder("http://url.to.file.mp3").setContentType("audio/mp3").setStreamType(MediaInfo.STREAM_TYPE_BUFFERED).setMetadata(mediaMetadata).build();

    Cast.CastApi.loadMedia(mApiClient, mediaInfo, true).setResultCallback(new ResultCallback() {
        @Override
        public void onResult(RemoteMediaPlayer.MediaChannelResult result) {
            if (result.getStatus().isSuccess()) {
                //媒体加载
                Toast.makeText(MainActivity.this, "Media loaded", Toast.LENGTH_SHORT).show();
            } else {
                //处理媒体加载错误
            }
        }
    });
}

接收者（Receiver）代码示例：

public class ReceiverActivity extends CastReceiverHelper {

    private static final String TAG = ReceiverActivity.class.getSimpleName();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setVolumeControl