如何通过安卓发送端应用在Chromecast上播放IMA广告

要通过发送端应用在Chromecast上播放IMA广告，官方文档给出的标准实现逻辑是将携带pubads URL的消息发送给Chromecast接收端，核心代码实现如下：

private void loadMedia(MediaInfo mediaInfo, Boolean autoplay) {
    try {
        Log.d(TAG, "loading media");
        mRemoteMediaPlayer.load(sApiClient, mediaInfo, autoplay)
                .setResultCallback(new ResultCallback<RemoteMediaPlayer.MediaChannelResult>() {
                    @Override
                    public void onResult(RemoteMediaPlayer.MediaChannelResult result) {
                        if (result.getStatus().isSuccess()) {
                            boolean adStarted = mVideoPlayerController.hasAdStarted();
                            if (mVideoFragment.isVmap() || !adStarted) {
                                sendMessage("requestAd," + mAdTagUrl + ","
                                        + mVideoPlayerController.getCurrentContentTime());
                            } else {
                                sendMessage("seek,"
                                    + mVideoPlayerController.getCurrentContentTime());
                            }
                        } else {
                            Log.e(TAG, "Error loading Media : "
                                    + result.getStatus().getStatusCode());
                        }

*注：代码中的mAdTagUrl就是pubads链接。

pubads链接示例 #

https://pubads.g.doubleclick.net/gampad/ads?sz=640x480&iu=/124319096/external/single_ad_samples&ciu_szs=300x250&impl=s&gdfp_req=1&env=vp&output=vast&unviewed_position_start=1&cust_params=deployment%3Ddevsite%26sample_ct%3Dskippablelinear&correlator=

内容的提问来源于stack exchange，提问作者Manendra De Mel