Android_socket入门_1

客户端与服务器端的简单通信：

服务器端：

package com.main.java;
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;

public class Server {
	public static void main(String[] args) {
		try {
			//新建serversocket对象
			ServerSocket serverSocket=new ServerSocket(12306);
			System.out.println("服务器端开始监听");
			//监听
			Socket socket=serverSocket.accept();
			//输入流
			InputStream is=socket.getInputStream();
			//解析数据
			InputStreamReader ir=new InputStreamReader(is);
			BufferedReader br=new BufferedReader(ir);
			String s=null;
			StringBuffer sb=new StringBuffer();
			while((s=br.readLine())!=null) {
				sb.append(s);
			}
			System.out.println("客户端发来数据："+sb.toString());
			socket.shutdownInput();
			OutputStream os=socket.getOutputStream();
			os.write(sb.toString().getBytes());
			os.flush();
			socket.shutdownOutput();
			os.close();
			
			br.close();
			ir.close();
			is.close();
			socket.close();
			serverSocket.close();
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

　　客户端：

public class MainActivity extends AppCompatActivity {
    private Button button;
    private TextView textView;
    private EditText editText;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=findViewById(R.id.butt);
        textView=findViewById(R.id.textv);
        editText=findViewById(R.id.edit);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            //监听指定服务器ip
                            Socket socket=new Socket("123.56.137.134",12306);
                            //输出流
                            OutputStream os=socket.getOutputStream();
                            //写入数据
                            os.write(editText.getText().toString().getBytes());
                            os.flush();
                            socket.shutdownOutput();
                            //输入流
                            InputStream is=socket.getInputStream();
                            //解析返回的数据
                            InputStreamReader reader=new InputStreamReader(is);
                            BufferedReader br=new BufferedReader(reader);
                            String s="";
                            final StringBuffer stringBuffer=new StringBuffer();
                            while ((s=br.readLine())!=null){
                                    stringBuffer.append(s);
                            }
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    textView.setText(stringBuffer.toString());
                                }
                            });
                            br.close();
                            reader.close();
                            is.close();
                            os.close();
                            socket.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }).start();
            }
        });
    }