A sample application that keeps a permanent WebSocket connection in an Android bound Service.

When a message is received from the websocket, an event is sent via LocalBroadcastManager.

It handles network configuration changes using a receiver to stop/start the websocket depending on the network state.

The sheep in the current activity will start to bleat when a message is received from the websocket.

• First, use NodeJS to launch the server:

$ npm install
$ node main

• You can then access the websocket through:

http://localhost:3000/ws/

• Then, modify the com.nilhcem.websockets.WebSocketsService.WS_URL constant to specify the server IP:

private static final String WS_URL = "ws://SERVER_IP:3000/ws/websocket";

• Compile, deploy and run the application:

$ ./gradlew clean installDebug

• Finally, send a POST request to http://SERVER_IP:3000/dispatchMessage, the websocket will send the message to all the connected clients. You can use the awesome rest-client tool to assist you in this task.

• If the sheep bleats, that's a success (you can also see the received message in the device logs)

• NodeJS Sample Server
• Android Websocket Library