Question

我有客户端和服务器应用程序在单独的Android设备上运行但客户端无法与服务器通信后很多头砰我找不到错误，请检查错误，提前致谢我的客户端类是：

      public class MainActivity extends Activity {
     EditText et1;
     Button bt1;
      InetAddress IPAddress; 
   DatagramPacket  dp;
    String message;
  int SERVERPORT = 11111;
      String SERVER_IP = "192.168.1.101";
         DatagramSocket clientSocket;
      byte[] sendData;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    et1=(EditText)findViewById(R.id.EditText01);
    bt1=(Button)findViewById(R.id.myButton);
    message=et1.getText().toString();







    bt1.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub







                new Thread(new ClientThread()).start();


        }
    });


}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}





class ClientThread implements Runnable {

    @Override
    public void run() {
         try {


                clientSocket = new DatagramSocket(SERVERPORT);


            } catch (SocketException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }




         try {


             IPAddress = InetAddress.getByName(SERVER_IP);


         } catch (UnknownHostException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } 
         sendData =  message.getBytes();     

         dp = new DatagramPacket(sendData, sendData.length, IPAddress, SERVERPORT);




         try {


             clientSocket.send(dp);


         } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

         clientSocket.close();
         return;

        } 

    }



    }

我的服务器是：

 public class MainActivity extends Activity {
TextView tv1,tv2;
InetAddress broadcastIP;
private Boolean shouldRestartSocketListen=true;
static String UDP_BROADCAST = "UDPBroadcast";
DatagramSocket serverSocket=null;
byte[] data=null;
DatagramPacket dp=null;
    int SERVERPORT = 11111;

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

    tv1=(TextView)findViewById(R.id.textView1);
    new Thread(new serverThread()).start();
}

class serverThread implements Runnable {
    private void listenAndWaitAndThrowIntent(InetAddress broadcastIP, Integer port) throws Exception {
        byte[] recvBuf = new byte[15000];

        DatagramPacket packet = new DatagramPacket(recvBuf, recvBuf.length);

        while (shouldRestartSocketListen) {
            if (serverSocket == null || serverSocket.isClosed())
            {
                serverSocket = new DatagramSocket(port,broadcastIP);
            //  serverSocket.setBroadcast(true);
            }
        serverSocket.receive(packet);

        String senderIP = packet.getAddress().getHostAddress();
        String message = new String(packet.getData());
                    //Log.e("UDP", "Got UDB broadcast from " + senderIP + ", message: " +    message);
         tv1.setText(message);

        //broadcastIntent(senderIP, message);
        serverSocket.close();
        }
        }
    private void broadcastIntent(String senderIP, String message) {
        Intent intent = new Intent(MainActivity.UDP_BROADCAST);
        intent.putExtra("sender", senderIP);
        intent.putExtra("message", message);
        sendBroadcast(intent);
    }
    @Override
    public void run() {
        // TODO Auto-generated method stub


        try {
            broadcastIP = InetAddress.getByName("192.168.1.100");
        } catch (UnknownHostException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

            try {
                listenAndWaitAndThrowIntent(broadcastIP, SERVERPORT);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
    }

}

void stopListen() {
    shouldRestartSocketListen = false;
    serverSocket.close();

         }
         }

没有log cat，因为我在真实设备上运行。

Answer 1

我不能因为声誉而添加coments但是使用asynctasks ..为send创建一个类，为receive创建另一个类。我把两者放在一起......未经测试。

public class SenderBroadcastAsyncTask extends AsyncTask<Void, Integer, String> {

 Context context;
 public SenderBroadcastAsyncTask(Context context) {
     this.context = context.getApplicationContext();
 }
 @Override
 protected String doInBackground(File... imagen) {  

int port =1515;
    DatagramSocket socket = null;
    try {
        socket = new DatagramSocket(port);
    } catch (SocketException e) {
        e.printStackTrace();
    }
    try {
        socket.setBroadcast(true);
    } catch (SocketException e) {
        e.printStackTrace();
    }


    //////send socket
    int eport = 1616;
    InetAddress eip = null;
    try {
        eip = InetAddress.getByName("192.168.1.1");  ////SERVER IP ADDRESS ---- 
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }


    DatagramSocket esocket = null;
    try {
        esocket = new DatagramSocket(eport);
    } catch (SocketException e) {
        e.printStackTrace();
    }

/////sending 
string send = "something";
byte[] sendbyte = send.getBytes
DatagramPacket somedatagrampacket = new Datagrampacket(sendbyte,sendbyte.length,eip,eport);
esocket.send(somedatagrampacket)






//////Start receive
    while(true)
    {


        byte[] message = new byte[60*1024];
        DatagramPacket recv_packet = new DatagramPacket(message, message.length);


        try {
            socket.receive(recv_packet);
        } catch (IOException e) {
            e.printStackTrace();
        }
    ///Do something whit recv_packet
}



protected void onPostExecute(String result) {

///something to do whit results

   }
   }

局域网中android上的数据报客户端服务器

1 个答案: