Developing for Chromecast Cast Companion Library & Custom Receiver Application

Kurt / peirr.com

What is Chromecast?

How does it work?

Sender application Two components Applications running on a mobile device or laptop Receiver application (HTML, JavaScript, CSS) app running on a Chromecast or other cast compatible device.

Sender application Two components Applications running on a mobile device or laptop Receiver application (HTML, JavaScript, CSS) app running on a Chromecast or other cast compatible device.

Receiver application

Custom Media Receiver 3 Types of receivers Requires application id, DRM Content, Data centric apps Styled Media Receiver Can be styled with CSS files, requires application id Default Media Receiver Does not require application id, can use CastMediaControlIntent.DEFAULT_MEDIA_RECEIVER_APPLICATION_ID in your sender if using CCL

Custom Receiver

Receiver API

Simple Custom Receiver LocalCast

//[3] handle the payload from the sender function process(json){ console.log('received: ' + json.url); document.getElementById("image").src= json.url; } //[1] get a handle to the receiver manager window.castReceiverManager = cast.receiver.CastReceiverManager.getInstance(); castReceiverManager.onSenderDisconnected = function(event) { console.log('disconnected: ' + event.data); if (window.castReceiverManager.getSenders().length == 0) { //close the app if we have no more connected devices window.close(); } }; //[2] create a CastMessageBus to handle messages for a custom namespace window.messageBus = window.castReceiverManager.getCastMessageBus('urn:x-cast:com.peirr.localcast'); window.messageBus.onMessage = function(event) { var json = JSON.parse(event['data']); //decode the request from sender app window.sender = event.senderId; process(json); } //[4]start the listener window.castReceiverManager.start();

Publishing Receiver Application

Development Publish to any server & add endpoint to cast console Debug Production Server has to be secure ( ) Google Cast SDK Developer Console Publishing

Development Publish to any server & add endpoint to cast console Debug Production Server has to be secure ( ) Google Cast SDK Developer Console Publishing

Development Publish to any server & add endpoint to cast console Debug Production Server has to be secure ( ) Google Cast SDK Developer Console Publishing

Sender Application

Android development options

compile "com.android.support:mediarouter-v7:23.3.0" compile 'com.google.android.gms:play-services-cast:8.4.0'

compile "com.android.support:mediarouter-v7:23.3.0" compile 'com.google.android.gms:play-services-cast:8.4.0' compile 'com.google.android.libraries.cast.companionlibrary:ccl:2.8.3'

Cast Companion Library

Example: LocalCast

Initialize CastConfiguration options =new CastConfiguration.Builder("84B70D9D").enableAutoReconnect().enableDebug().build(); DataCastManager.initialize(this,options);

Cast Button <item app:actionProviderClass="android.support.v7.app.MediaRouteActionProvider" public boolean onCreateOptionsMenu(Menu menu){ super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.menu,menu); DataCastManager.getInstance().addMediaRouterButton(menu,R.id.action_cast); return true; }

Send data to Receiver Application JSONObject obj = new JSONObject(); String url = " info.ip + ":" + info.port + "/" + item.getFile().getAbsolutePath(); Log.d(TAG, "casting: " + url); try { obj.put("url",url); DataCastManager.getInstance().sendDataMessage(obj.toString(),"urn:x- cast:com.peirr.localcast"); } catch (JSONException|IOException e) { e.printStackTrace(); }

Questions