Android-TCP编程

以下是PC端代码：

package com.example.sxb.myapplication;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
/**
 * Created by Administrator on 2017/12/13.
 */
public class pcChat {
    public static void main(String[] args)
    {

        //收
        new Thread(){
            @Override
            public void run() {
                try {
                    while(true){
                        //模拟器5554发，PC收
                    ServerSocket  ss = new ServerSocket(7777);//PC端6666端口接收消息
                    Socket s = ss.accept ();
                    InputStream in = s.getInputStream();
                    byte[] buf = new byte[1024];
                    int num = in.read(buf);
                    String str = new String(buf,0,num);
                    System.out.println(s.getInetAddress().toString()+":"+str);
                    s.close();
                    ss.close();}
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }.start();
        //发
        new Thread(){
            @Override
            public void run() {
                try {
                    while(true){
                    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                    String str = null;
                    System.out.println("请输入你要发送的内容：");
                    str = br.readLine();
                    System.out.println("你发送的消息:"+str);
                    //PC发，模拟器5554收
                    Socket s = new Socket("localhost",4444);//向模拟器4444端口号发送消息
                    OutputStream out = s.getOutputStream();
                    out.write(str.getBytes());
                    s.close();}
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }.start();
    }

}

以下是模拟器端代码：

package com.example.sxb.myapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class DochatActivity extends AppCompatActivity {
    TextView tv_getMessage;
    EditText et_setMessage;
    Button bt_send;
    String str;
    Socket s;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_dochat);
        tv_getMessage=(TextView) findViewById(R.id.getMessage);
        et_setMessage=(EditText) findViewById(R.id.et_setMessage);
        bt_send=(Button) findViewById(R.id.bt_send);
        new Thread(){
            @Override
            public void run() {
                try {
                    //收
                    while(true){
                    //模拟器5554收，模拟器5556发
                 ServerSocket  ss = new ServerSocket(4444);//模拟器4444接收消息
                   s = ss.accept ();
                    InputStream in = s.getInputStream();
                    byte[] buf = new byte[1024];
                    int num = in.read(buf);
                    str = new String(buf,0,num);
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            tv_getMessage.setText(s.getInetAddress().toString()+":"+str);
                        }
                    });
                    s.close();
                    ss.close();}
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }.start();
    }
    public void click(View v){
        switch (v.getId()){
            case R.id.bt_send:

                new Thread(){
                    @Override
                    public void run() {
                        try {
                            //发
                            //模拟器5554发,PC收
                           Socket   s = new Socket("10.0.2.2",7777);//向PC端7777发送消息
                            //模拟器5554发，模拟器5556收
                          // Socket s=new Socket("10.0.2.2",6666);//模拟器6666 6666端口号收
                            OutputStream out = s.getOutputStream();
                            out.write(et_setMessage.getText().toString().getBytes());
                            s.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }.start();
        }
    }
}
以下是布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
   <TextView
       android:id="@+id/getMessage"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:textSize="20sp"
       android:text="即将接收消息..."
       />
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        >
    <EditText
        android:id="@+id/et_setMessage"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:hint="请输入消息"
        />
    <Button
        android:id="@+id/bt_send"
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:text="发送"
        android:layout_toRightOf="@+id/et_setMessage"
        android:onClick="click"/>
    </RelativeLayout>
</LinearLayout>

写完代码以后的操作步骤：
1.在cmd输入指令：telnet，检查telnet有没有打开；
2.控制面板》程序》程序和功能》打开或关闭Windows功能》勾选Telnet服务器和telnet客户端；
3.telnet localhost 5554(注意：打开模拟器5554之后操作这一步)；
4.去  C:\Users\neusoft\.emulator_console_auth_token  下面用记事本打开复制token；
5.在cmd 输入 ：auth 44kZIm47P+BkAPhI；（不同电脑可能不一样，看token里面的数据）
6.在cmd输入：redir add tcp:4444:4444；

（端口重映射 ）

tcp:电脑端口号:模拟器端口号