Android TCP客戶端無法使用wifi從TCP Server接收數據

Question

我在使用wifi模塊的計算機和android設備之間發送/接收數據時遇到問題。 我的計算機可以從android發送/接收數據，但是android設備無法從計算機接收數據，它只能發送什么錯誤？ 我將計算機設置為TCP Server，而android是TCP Client。 我認為DataInputStrem中存在錯誤，但我不知道如何解決。

public class TCPClient {

    private String serverMessage;
    public static final String SERVERIP = "192.168.0.1"; //your computer IP address
    public static final int SERVERPORT = 6000;
    private OnMessageReceived mMessageListener = null;
    private boolean mRun = false;

    DataOutputStream out;
    DataInputStream in;

    /**
     *  Constructor of the class. OnMessagedReceived listens for the messages received from server
     */
    public TCPClient(OnMessageReceived listener) {
        mMessageListener = listener;
    }

    /**
     * Sends the message entered by client to the server
     * @param message text entered by client
     */
    public void sendMessage(String message){
        if (out != null) {
            try {
                out.writeUTF(message);
                out.flush();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
    }

    public void stopClient(){
        mRun = false;
    }

    public void run() {

        mRun = true;

        try {
            //here you must put your computer's IP address.
            InetAddress serverAddr = InetAddress.getByName(SERVERIP);

            Log.e("TCP Client", "C: Connecting...");

            //create a socket to make the connection with the server
            Socket socket = new Socket(serverAddr, SERVERPORT);

            try {
                //send the message to the server
                out = new DataOutputStream(socket.getOutputStream());
                Log.e("TCP Client", "C: Sent.");
                Log.e("TCP Client", "C: Done.");

                //receive the message which the server sends back
                in = new DataInputStream(socket.getInputStream());
                Log.e("TCP Client x", in.readUTF());
                //in this while the client listens for the messages sent by the server
                while (mRun) {
                    serverMessage = in.readUTF();
                    if (serverMessage != null && mMessageListener != null) {
                        //call the method messageReceived from MyActivity class
                        mMessageListener.messageReceived(serverMessage);
                    }
                    serverMessage = null;
                }
                Log.e("RESPONSE FROM SERVER", "S: Received Message: '" + serverMessage + "'");

            } catch (Exception e) {

                Log.e("TCP", "S: Error", e);

            } finally {
                //the socket must be closed. It is not possible to reconnect to this socket
                // after it is closed, which means a new socket instance has to be created.
                socket.close();
            }

        } catch (Exception e) {

            Log.e("TCP", "C: Error", e);

        }

    }
    //Declare the interface.
    //class at on asynckTask doInBackground
    public interface OnMessageReceived {
        public void messageReceived(String message);
    }
}

Answer 1

謝謝您的所有回答，對不起，這個問題尚不清楚。 我的項目是通過包含wifi模塊“ HLKM03”的電子板在Android設備和電子板之間進行連接。 我通過測試連接

1我在使用TCPClient應用程序的客戶端（Android）中看到數據發送/接收。 和
2我在服務器端（電子板+ Wifi接入點）看到數據發送/接收，因此我通過此解決方案檢查了數據傳輸“ wifi +電子板-> usb2RS232->計算機（docklight程序）”。 來自所有。 現在，我可以通過更改此代碼來解決所有問題

 try {
            //send the message to the server
            out = new DataOutputStream(socket.getOutputStream());
            Log.e("TCP Client", "C: Sent.");
            Log.e("TCP Client", "C: Done.");

            //receive the message which the server sends back
            in = new DataInputStream(socket.getInputStream());
            //Log.e("TCP Client x", in.readUTF());
            //in this while the client listens for the messages sent by the server
            while (mRun) {
                //serverMessage = in.readUTF();
                //TCPClient localClientActivity = TCPClient.this;
                int j = in.read(buffer);
                serverMessage = bytesToHexString(buffer, j);

                if (serverMessage != null && mMessageListener != null) {
                    //call the method messageReceived from MyActivity class
                    mMessageListener.messageReceived(serverMessage);
                }
                serverMessage = null;
            }
            Log.e("RESPONSE FROM SERVER", "S: Received Message: '" + serverMessage + "'");

        } catch (Exception e) {

            Log.e("TCP", "S: Error", e);

        } finally {
            //the socket must be closed. It is not possible to reconnect to this socket
            // after it is closed, which means a new socket instance has to be created.
            socket.close();
        }

並添加函數chage bytetoHexString用於轉換數據從服務器接收數據。 它可以幫助我的android已經從我的電子板上接收數據。 再次感謝你。