Android中的TCP客戶端

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我想讓客戶端連接到服務器發送數據（請求）和接收數據（回覆）。Android中的TCP客戶端

我有TCP服務器（PC/Ubuntu Linux操作系統）：

public class TCPClient { 

    public static void main(String argv[]) throws Exception { 

     System.out.println("Client started."); 
     String sentence; 
     String modifiedSentence; 
     BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in)); 
     Socket clientSocket = new Socket("localhost", 5555); 
     DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream()); 
     BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); 
     sentence = inFromUser.readLine(); 
     outToServer.writeBytes(sentence + '\n'); 
     modifiedSentence = inFromServer.readLine(); 
     System.out.println("FROM SERVER: " + modifiedSentence); 
     clientSocket.close(); 
    } 
}

和TCP客戶端（安卓）：

public class TCPClient2 extends AsyncTask<String, Integer, Boolean> { 
    Socket clientSocket; 

    String sentence; 
    String modifiedSentence; 

    DataOutputStream outToServer; 
    BufferedReader inFromServer; 

    public TCPClient2() throws IOException { 
    } 

    public void close(){ 
     try { 
      clientSocket.close(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    protected Boolean doInBackground(String... arg0) { 

     try { 
      Log.d("TcpClient", "Client started."); 

      clientSocket = new Socket("192.168.1.8", 5555); 
      outToServer = new DataOutputStream(clientSocket.getOutputStream()); 
      inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); 
      sentence = "getTemp"; 

      outToServer.writeBytes(sentence + '\n'); 
      modifiedSentence = inFromServer.readLine(); 
      Log.d("TcpClient","FROM SERVER: " + modifiedSentence); 
      clientSocket.close(); 

     } catch (SocketException e) { 
      e.printStackTrace(); 
      Log.d("TcpClient", "Error: " + e.getMessage()); 
     } catch (IOException e) { 
      e.printStackTrace(); 
      Log.d("TcpClient","Error: " + e.getMessage()); 
     } 

     return null; 
    } 

    @Override 
    protected void onProgressUpdate(Integer... values) { 
     super.onProgressUpdate(values); 
     Log.d("TcpClient", String.valueOf(values)); 
    } 

}

權限：在ADM

<uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

結果：

01-14 20:22:17.721: D/TcpClient2(23925): Click!!!
01-14 20:31:35.861: D/TcpClient(23925): Client started.
01-14 20:31:35.951: D/TcpClient(23925): Error: failed to connect to 192.168.1.8 (port 5555): connect failed: ECONNREFUSED (Connection refused)

它不工作;（

來源

2016-01-14 Michał Hanusek

'無法寫入正確的代碼'不是問題描述。 – EJP

對不起，我有這麼評論沒有足夠的聲望：你，如果你連接到IP萊特擡頭？所以如果你的服務器的IP是192.168.1.8。在你的電腦上是否有mybe的frewall或防病毒sstem，並阻止連接？

來源

2016-01-24 11:02:56

Android中的TCP客戶端

回答

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