Question

我想在Android客户端和Nodejs服务器之间建立持久连接。我选择在后台运行的intentservice中启动连接，并通过send方法与服务器进行交互。连接稳定并且send方法起作用，但是从不调用WebSocketClient方法（onOpen，onMessage，onClose，onError）。

我们正在使用

implementation 'org.java-websocket:Java-WebSocket:1.3.0'

客户：

import android.app.IntentService;
import android.content.Intent;
import android.os.Handler;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.handshake.ServerHandshake;
import java.net.URI;
import java.net.URISyntaxException;

public class WebSocketService extends IntentService {
    public static WebSocketClient webSocketClient;
    private URI uri;

    public WebSocketService() {
        super("WebSocketService");
        try {
            uri = new URI("ws://192.168.43.54:1337");

        } catch (URISyntaxException e) {
            e.printStackTrace();
        }
        webSocketClient = new WebSocketClient(uri) {
            @Override
            public void onOpen(ServerHandshake handshakedata) {
                //some code
            }

            @Override
            public void onMessage(String message) {
            }

            @Override
            public void onClose(int code, String reason, boolean remote) {
            }

            @Override
            public void onError(Exception ex) {
            }
        };
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        webSocketClient.connect();
        return super.onStartCommand(intent,flags,startId);
    }

    @Override
    protected void onHandleIntent(final Intent intent) {
            Handler handler = new Handler(getMainLooper());
            handler.post(new Runnable() {

                @Override
                public void run() {
                    //handle intent

                }
            });
    }
}

MainActivity：

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Intent intent = new Intent(this, WebSocketService.class);
        startService(intent);
    }

服务器Nodejs：

var WebSocketServer = require('websocket').server;
var http = require('http');
var server = http.createServer(function(request, response) {
  // process HTTP request. Since we're writing just WebSockets
    // server we don't have to implement anything.
    response.end("WORK!!");
});
server.listen(1337, function() {console.log("SERVER STARTED"); });
// create the server
wsServer = new WebSocketServer({
  httpServer: server
});
// WebSocket server
wsServer.on('request', function(request) {
  var connection = request.accept(null, request.origin);
console.log("A connection started");
  connection.on('message', function(message) {
      if (message.type === 'utf8') {

      // process WebSocket message
      connection.sendUTF(message.utf8Data);
          console.log("MESSAGE RECEIVED:" +message.utf8Data);
    }
 });
  connection.on('close', function(connection) {
    // close user connection
    console.log("A connection is closed");
  });
});

Android无法启动websocket事件

0 个答案: