Android之Socket通信（一）

一、服务器端，运行在PC机上

import java.io.*;
import java.net.*;
public class SimpleServer{
    public static void main(String[] args) throws IOException{
        ServerSocket ss=new ServerSocket(30000);
        while(true){
           Socket s=ss.accept();
            OutputStream os=s.getOutputStream();           
            os.write("中国欢迎您".getBytes("GBK"));           
            os.close();           
        }
    }   
}

二、客户端，运行在Android设备上

1.在AndroidManifest.xml文件中添加权限

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

2.MainActivity.java

package com.example.shiyanshi.simpleclient;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.Socket;

public class MainActivity extends AppCompatActivity {

    TextView txtShowData;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        txtShowData= (TextView) findViewById(R.id.txtShowServerData);
        txtSend=(EditText)findViewById(R.id.txtSend);

        new Thread(){
            @Override
            public void run() {
                super.run();
                try {

                    Socket socket = new Socket("116.57.85.184", 30000);

                    InputStream inputStream = socket.getInputStream();
                    //以GBK编码方式构建BufferReader
                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"GBK"));
                    String line = bufferedReader.readLine();
                    String string=new String(line.getBytes("GBK"));
                    txtShowData.setText(string);

                    bufferedReader.close();
                    socket.close();

                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }.start();
    }
}