java - 如何从客户端-服务器套接字连接读取响应？

Question

我正在从我的Android APP执行Shell命令。我能够执行命令，但无法读取服务器的响应。
我的代码如下:

public String executeThroughSocket(int portNo, String portAddress, String command) throws IOException {

    StringBuilder responseString = new StringBuilder();

    PrintWriter writer = null;
    BufferedReader bufferedReader = null;
    Socket clientSocket = null;

    try {
        clientSocket = new Socket(portAddress, portNo);
        if (!clientSocket.isConnected())
            throw new SocketException("Could not connect to Socket");

        clientSocket.setKeepAlive(true);

        writer = new PrintWriter(clientSocket.getOutputStream(), true);
        writer.println(command);
        writer.flush();

        bufferedReader = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        String str;
        while ((str = bufferedReader.readLine()) != null) {
            responseString.append(str);
        }

    } finally {
        if (writer != null)
            writer.close();
        if (bufferedReader != null)
            bufferedReader.close();
        if (clientSocket != null)
            clientSocket.close();
    }
    return responseString.toString();
}

Answer 1

我的代码没有错。是服务器未发送任何响应。