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第一步：mainActivity.javapackage com.example.mydownloadmusic01;import android.annotation.SuppressLint;import android.os.Handler;import android.os.Message;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import androidx.appcompat.app.AppCompatActivity;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;public class MainActivity extends AppCompatActivity {
       TextView tv;    Button btn;    EditText edt;    String NeedFindWords;    private final int HANDLER_MSG_TELL_RECV = 0x124;    @SuppressLint("HandlerLeak")    Handler handler = new Handler(){
           public void handleMessage(Message msg){
               //接受到服务器信息时执行//            Toast.makeText(MainActivity.this,(msg.obj).toString(),Toast.LENGTH_LONG).show();            tv.setText((msg.obj).toString());        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btn = findViewById(R.id.button);        edt=(EditText)findViewById(R.id.editText);        tv= (TextView) findViewById(R.id.ReData);        btn.setOnClickListener(new View.OnClickListener() {
               @Override            public void onClick(View v) {
                   // 响应事件                NeedFindWords=edt.getText().toString();                startNetThread();            }        });    }    private void startNetThread() {
           new Thread() {
               @Override            public void run() {
                   try {
                       Socket socket = new Socket("192.168.1.7", 666);                    InputStream is = socket.getInputStream();                    OutputStream out = socket.getOutputStream();                    out.write(NeedFindWords.getBytes());					//3.发送                    out.flush();                    byte[] bytes = new byte[1024];                    int n = is.read(bytes);                    Message msg = handler.obtainMessage(HANDLER_MSG_TELL_RECV, new String(bytes, 0, n));                    msg.sendToTarget();                    is.close();                    socket.close();                } catch (Exception e) {
                   }            }        }.start();    }}第二步 activity-main.xml
   
       
        
        
    
   

import socketimport sysfrom time import ctimedef FindMusicName(MusicName):    f = open('musicName3.txt','r',encoding='utf8')    for lines in f.readlines():        if lines.find("马桃")!=-1:            print(lines)            print("find it .........................")            return lines# 1.socket(socket_family, socket_type, protocol=0)# 其中，socket_family 是 AF_UNIX 或 AF_INET,ocket_type 是 SOCK_STREAM或 SOCK_DGRAM, protocol 通常省略，默认为 0。# 为了创建 TCP/IP 套接字，可以用下面的方式调用 socket.socket()。# tcpSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)# 同样，为了创建 UDP/IP 套接字，需要执行以下语句。# udpSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)ServerSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)# 获取本地机器名host = socket.gethostname()# 设置端口port = 666# 2.s.bind绑定本地地址到socket对象ServerSocket.bind((host, port))# 3.s.listen监听地址端口，连接几个客户端ServerSocket.listen(2)while True:    # 4.s.accept阻塞接受链接请求，被动接受 TCP 客户端连接，一直等待直到连接到达（阻塞）    # accept()方法会返回一个含有两个元素的元组（fd,addr）。    # 第一个元素是新的socket对象，服务器通过它与客户端通信。    # 第二个元素也是元组，是客户端的地址及端口信息。    clientsocket, addr = ServerSocket.accept()    print("连接地址:%s" % str(addr))    msg = "welcomt to my demo"    all_line=""    #send()和recv()的数据格式都是bytes。    # (str和bytes的相互转化，用encode()和decode(),或者用bytes()和str())    print("send msg:welcomt to my demo.")    #clientsocket.send(msg.encode("utf-8"))    data = clientsocket.recv(1024)    print(data.decode("utf-8"))    print("显示文件歌曲查询结果")    f = open('musicName3.txt','r',encoding='utf8')    for lines in f.readlines():        if lines.find(data.decode("utf-8"))!=-1:            print(lines)            print("find it .........................")            all_line=all_line+lines;            continue    data2= all_line.encode("utf-8")    print(all_line)    #data1 = ('[%s] %s' % (ctime(),data.decode())).encode("utf-8")    clientsocket.send(data2)    #clientsocket.send(str(MusicN).decode("utf-8"))    clientsocket.close()ServerSocket.close()

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