是否有可能以编程方式连接到Chromecast路由？ [英] Is it possible to programmatically connect to a chromecast route?

问题描述

我正在写一个chromecast接收器应用程序，它将（希望）允许我远程将警报消息放在电视机上作为提醒。

I'm writing a chromecast receiver application that will (hopefully) allow me to remotely put alert messages up on my TV to serve as reminders.

我的计划是在我的家庭网络上有一个专用的无线设备，它将不断地轮询来自中央服务器的新消息。当找到新消息时，它会连接到Chromecast路由，打开电视并显示新消息。

My plan was to have a dedicated wireless device on my home network that would constantly poll for new messages from a centralized server. When a new message was found, it would connect to a chromecast route, turning on the TV and displaying the new message.

但据我所知，唯一的激活Chromecast路线的方法是手动点击我的Chrome浏览器或无线设备上的Chromecast图标。

But as far as I can tell, the only way to activate a chromecast route is by manually clicking the chromecast icon on my Chrome browser or wireless device.

有没有一种方法可以通过编程方式激活Chromecast？是否可以在发件人完成？

Is there a way, programmatically, to activate the chromecast? Can it be done in the sender?

推荐答案

您可以编程扫描投射设备并根据需要连接到它们。步骤如下：

You can programmatically scan for cast devices and connect to them if needed. Steps are:

1. 从系统获取MediaRouter单例实例： mMediaRouter
   
2. 构建一个选择器：
   mMediaRouteSelector = new MediaRouteSelector.Builder（）
.addControlCategory（
CastMediaControlIntent
。
mMediaRouter.addCallback（mMediaRouteSelector（））;}}。build（）;
添加回调以启动扫描：
，
MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN）;

3. onRouteAdded（）和<$当您发现或移除路由时，您的回调（即 mMediaRouterCallback ）的c $ c> onRouteRemoved（）将被调用。您可以在应用中维护路由列表，并使用这两个回调使它们保持最新。


4. 您可以通过调用 mMediaRouter.selectRoute（ aRouteInfo）。然后调用回调函数的 onRouteSelected（），您可以像平常一样提取投射设备并按需要进行操作。

1. Get an instance of the MediaRouter singleton from the system: mMediaRouter
2. Build a selector: mMediaRouteSelector = new MediaRouteSelector.Builder() .addControlCategory( CastMediaControlIntent .categoryForCast(YOUR_APP_ID)).build();
3. Add a callback to initiate scan: mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback, MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN);
4. The onRouteAdded() and onRouteRemoved() of your callback (i.e. mMediaRouterCallback) will be called as routes are discovered or removed. You can maintain a list of routes in your app and keep them up to date by using these two callbacks.
5. You can select a route by calling mMediaRouter.selectRoute(aRouteInfo). Then the onRouteSelected() of your callback will be called and you can extract the cast device as usual and do as you please.

请注意，如果您想在电视上向用户显示通知，那么您的应用程序应该在当时在Chromecast上运行你想发送通知。

These said, remember that if you want to show a notification to users on TV your app should be running on the chromecast at the time you want to send the notification.

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