Question

我正在尝试使用TcpClient连接到Android模拟器。模拟器是运行在localhost：5554上的Android 4.2.2，我从AVD Manager开始。我能够连接并发送'power status discharge'命令，但在发送第二个命令后，程序挂起等待响应。当我使用Putty原始连接进行连接时，这些命令有效。

以下是完整代码：

using System;
using System.Net.Sockets;
using System.Text;

namespace AndroidBatteryChangeEmulator
{
    class Program
    {
        private static readonly TcpClient connection = new TcpClient();

        static void Main(string[] args)
        {
            try
            {
                connection.Connect("localhost", 5554);
                NetworkStream stream = connection.GetStream();

                ReadDataToConsole(stream);
                SendCommand(stream, "power status discharging");

                string command = string.Format("power capacity {0}", 50);
                SendCommand(stream, command);

                stream.Close();
                connection.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine("The following error has occured: {0}", ex.Message);
            }
        }

        private static void ReadDataToConsole(NetworkStream stream)
        {
            var responseBytes = new byte[connection.ReceiveBufferSize];
            stream.Read(responseBytes, 0, connection.ReceiveBufferSize);

            string responseText = Encoding.ASCII.GetString(responseBytes).Trim(new[] { ' ', '\0', '\n', '\r' });
            if (!string.IsNullOrEmpty(responseText))
                Console.WriteLine("Response: '{0}'.", responseText);
        }

        private static void SendCommand(NetworkStream stream, string command)
        {
            Console.WriteLine("Sending command '{0}'.", command);
            byte[] commandBytes = Encoding.ASCII.GetBytes(command + "\r");
            Buffer.BlockCopy(command.ToCharArray(), 0, commandBytes, 0, commandBytes.Length);

            stream.Write(commandBytes, 0, commandBytes.Length);

            ReadDataToConsole(stream);
        }

    }
}

以下是该计划的输出：

Response: 'Android Console: type 'help' for a list of commands'.
Sending command 'power status discharging'.
Response: 'OK'.
Sending command 'power capacity 50'.

我不确定导致问题的原因。

提前感谢您的帮助！

Answer 1

如果有人想知道，我通过在NetworkStream函数StreamReader和ReadDataToConsole()函数中StreamWriter包裹SendCommand()来解决问题。确保AutoFlush中的true为StreamWriter！

现在一切正常！

Answer 2

你介意发布你的工作代码吗？这是我使用的代码（对于未来的访问者）：

using (TcpClient client = new TcpClient(host, port))
{
    using (NetworkStream stream = client.GetStream())
    {
        using (StreamReader reader = new StreamReader(stream))
        {
            using (StreamWriter writer = new StreamWriter(stream))
            {
                writer.AutoFlush = true;
                foreach (string command in commandList)
                {
                    writer.WriteLine(command);
                    string response = reader.ReadLine();
                    Thread.Sleep(5000);
                }
            }
        }
    }
}

马丁

使用.NET C＃连接到Android模拟器

2 个答案: