java - 自定义接收器无法正确启动

Question

当我从发送器应用程序连接到 CC 设备时，自定义接收器通常无法正确启动。

它将加载，但永远不会处于就绪状态。

这是 logcat 输出:

01-21 14:16:09.603  19396-19396/com.example.chromecast D/PlayActivity onRouteSelected
01-21 14:16:16.913  19396-19396/com.example.chromecast D/PlayActivity onConnected
01-21 14:16:16.953  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] onConnected() reached with prior suspension: false
01-21 14:16:16.953  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] launchApp() is called
01-21 14:16:16.953  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] Launching app
01-21 14:16:17.003  19396-19396/com.example.chromecast D/ccl_DataCastManager﹕ [v1.11] onApplicationStatusChanged() reached:
01-21 14:16:19.513  19396-19396/com.example.chromecast D/ccl_DataCastManager﹕ [v1.11] onApplicationStatusChanged() reached: null
01-21 14:16:20.633  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] launchApplication() -> failure result
01-21 14:16:20.633  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] disconnectDevice(true,false)
01-21 14:16:20.633  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] mConnectionSuspended: false
01-21 14:16:20.633  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] clearPersistedConnectionInfo(): Clearing persisted data for 0
01-21 14:16:20.653  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] onDisconnected() reached
01-21 14:16:20.653  19396-19396/com.example.chromecast D/ccl_BaseCastManager﹕ [v1.11] Trying to disconnect
01-21 14:16:37.295  19396-19396/com.example.chromecast D/PlayActivity ApplicationConnectionResultCallback.onResult: statusCode15
01-21 14:16:37.295  19396-19396/com.example.chromecast E/PlayActivity application could not launch
01-21 14:16:37.295  19396-19396/com.example.chromecast D/PlayActivity teardown

如果我在发送器应用中断开连接，然后重新连接，接收器将进入就绪状态，我可以转换我的内容。

什么会导致这种行为？ (这种情况经常发生，而且非常令人沮丧!)

一些代码:

(媒体路由初始化)

mMediaRouter = MediaRouter.getInstance(getApplicationContext());
    mMediaRouteSelector = new MediaRouteSelector.Builder()
            .addControlCategory(
                    CastMediaControlIntent.categoryForCast(getResources()
                            .getString(R.string.app_id))).build();
    mMediaRouterCallback = new MyMediaRouterCallback();

    mDataCastManager = DataCastManager.initialize(this, getResources().getString(R.string.app_id), getResources().getString(R.string.namespace));
    mDataCastManager.reconnectSessionIfPossible(this, true, 20);

媒体路由按钮

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    MenuItem mediaRouteMenuItem = menu.findItem(R.id.media_route_menu_item);
    MediaRouteActionProvider mediaRouteActionProvider = (MediaRouteActionProvider) MenuItemCompat.getActionProvider(mediaRouteMenuItem);
    mediaRouteActionProvider.setRouteSelector(mMediaRouteSelector);

    return super.onCreateOptionsMenu(menu);
}

回调

private class MyMediaRouterCallback extends MediaRouter.Callback {

    @Override
    public void onRouteSelected(MediaRouter router, MediaRouter.RouteInfo info) {
        Log.d(TAG, "onRouteSelected");
        // Handle the user route selection.
        mSelectedDevice = CastDevice.getFromBundle(info.getExtras());

        launchReceiver();
    }

    @Override
    public void onRouteUnselected(MediaRouter router, MediaRouter.RouteInfo info) {
        Log.d(TAG, "onRouteUnselected: info=" + info);
        teardown();
        mSelectedDevice = null;
    }
}

如您所见，我的大部分实现来自 CastHelloText Android 示例应用程序。我已在 CCL 库中添加了内容以方便进行 session 管理，但我认为这就是导致问题的原因。

在连接 CC 设备进行转换时，注释掉 DataCastManager 似乎可以提供更好的结果。

Answer 1

如果您正在使用 CCL，请停止管理媒体路由器按钮、媒体路由器的直接回调、启动接收器等，因为这些都是由 CCL 处理的。如果您想自己做这些事情，请停止使用 CCL；您目前正在以错误的方式混合两种不同的东西。阅读 CCL 上的文档会很有帮助。