Android的TCP客户端在一个TextView读取插座 [英] Android TCP client read socket in a TextView

问题描述

我开发的Andr​​oid设备的TcpClient。
我可以连接到一台服务器，我可以跟踪我从服务器接收邮件。
我想显示在服务器上的客户端GUI发送的处理结果的 TextView的textview_textin

I am developing a TCPclient for Android device. I can connect to a server and I can track that I receive message from the server. I would like to display the result sent by the server on the client GUI with the TextView textview_textin

你能帮我做到这一点。

非常感谢

public class JssclientActivity extends Activity {
private EditText serverIp;

private Button connectPhones;

private String serverIpAddress = "192.168.0.2";

private boolean connected = false;

private TextView textview_textin;



public class ClientThread implements Runnable {

    public void run() {
        try {

            InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
            Log.d("ClientActivity", "C: Connecting...");
            Socket socket = new Socket(serverAddr, 2600);
            connected = true;
            while (connected) {
                try {

                    BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    String inMsg = "";
                    char buf[] = null;
                     int val = in.read();
                     while (-1 != val) {
                        inMsg = in.readLine();
                    }

                } catch (Exception e) {
                    Log.e("ClientActivity", "S: Error", e);
                }
            }
            socket.close();
            Log.d("ClientActivity", "C: Closed.");
        } catch (Exception e) {
            Log.e("ClientActivity", "C: Error", e);
            connected = false;
        }
    }
}


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

    textview_textin = (TextView) findViewById(R.id.textin);
    connectPhones = (Button) findViewById(R.id.connect);

    connectPhones.setOnClickListener( new View.OnClickListener() {  
     @Override
     public void onClick(View v) {
         if (!connected) {
             //serverIpAddress = serverIp.getText().toString();
            if (!serverIpAddress.equals("")) {
                 Thread cThread = new Thread(new ClientThread());
                 cThread.start();
                }            
         }
     }
 });

}
}

---

非常感谢您的答复。

---

Thanks a lot for your replies

我可以连接到该设备，但我什么也得不到。我不知道为什么？

I can connect to the device but I receive nothing. I don't know why?

下面是我的尝试，

 public class JssclientActivity extends Activity {
 private EditText serverIp;

 private Button connectPhones;

 private String serverIpAddress = "192.168.20.21";

private boolean connected = false;

 private TextView textview_textin;

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

  textview_textin = (TextView) findViewById(R.id.textin);
connectPhones = (Button) findViewById(R.id.connect);



ClientThread ct = new ClientThread(new ClientThread.SocketCallback() {
      public void onReceived(final String msg) {
        JssclientActivity.this.runOnUiThread(new Runnable() {
          @Override
          public void run() {
              textview_textin.setText(msg);
          }
        });
      }
    });

  }
 }




 class ClientThread implements Runnable {

interface SocketCallback {
  void onReceived(String msg);
}
private SocketCallback callback;

private boolean connected;

private Socket socket;

public ClientThread(ClientThread.SocketCallback cb) {
      this.callback = cb;
      try {InetAddress serverAddr = InetAddress.getByName("192.168.20.21");
      Log.d("ClientActivity", "C: Connecting...");
      //Socket
    socket = new Socket(serverAddr, 2600);
      connected = true;
      } catch (Exception e) {
          Log.e("ClientActivity", "C: Error", e);
          connected = false;
      }
    }

 public void run() {
      while (connected) {
          try {

              BufferedReader in = new BufferedReader(new        InputStreamReader(socket.getInputStream()));
              String inMsg = "";
              char buf[] = null;
               int val = in.read();
          //     while (-1 != val) {
           //       inMsg = in.readLine();
            //  }
               while (-1 != val) {
                  inMsg = in.readLine();
                  this.callback.onReceived(inMsg);
                }

          } catch (Exception e) {
              Log.e("ClientActivity", "S: Error", e);
          }
      }
    //  socket.close();
      Log.d("ClientActivity", "C: Closed.");

 }
 }

请你能帮助我吗？

感谢

推荐答案

创建一个回调类，

interface SocketCallback {
  void onReceived(String msg);
}

这可能是一个内部 ClientThread ，因为它们有逻辑关系。这不是必须的，但它是很好的设计。

this can be an inner of ClientThread, as they are logically related. that's not required but it's good design.

有你的的Runnable 类接受这种回调在它的构造函数的一个实例。

have your Runnable class accept an instance of this callback in it's constructor.

public ClientThread(ClientThread.SocketCallback cb) {
  this.callback = cb;
}

当你构建你的的Runnable （ ClientThread ），从你的UI类这样做（ JssClientActivity ），这样，

when you construct your Runnable (ClientThread), do so from your UI class (JssClientActivity), like this,

ClientThread ct = new ClientThread(new ClientThread.SocketCallback() {
  public void onReceived(String msg) {
    JssClientActivity.this.runOnUiThread(new Runnable() {
      @Override
      public void run() {
        myTextView.setText(msg);
      }
    });
  }
}};

最后，在 ClientThread ，当你收到一条消息，调用回调，

finally, in ClientThread, when you receive a message, call the callback,

while (-1 != val) {
  inMsg = in.readLine();
  this.callback.onReceived(inMsg);
}

请注意，你不能从那里ClientThread正在运行的线程更新UI。它必须从UI线程进行更新，因此调用 runOnUiThread（）。

note that you cannot update the UI from the thread where ClientThread is running. it must be updated from the UI thread, hence the call to runOnUiThread().

这篇关于Android的TCP客户端在一个TextView读取插座的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！