android studio 52 mp3下载客户端001_Java

第一步：mainActivity.java
package 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
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/editText"
        android:layout_width="301dp"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="Name"
        tools:layout_editor_absoluteX="10dp"
        tools:layout_editor_absoluteY="11dp" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:text="Button"
        tools:layout_editor_absoluteX="264dp"
        tools:layout_editor_absoluteY="8dp" />

    <TextView
        android:id="@+id/ReData"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_marginTop="7dp"
        android:layout_marginEnd="3dp"
        android:layout_marginRight="3dp"
        android:text="Hello World!"
        tools:layout_editor_absoluteX="0dp"
        tools:layout_editor_absoluteY="98dp" />

</RelativeLayout>

在这里插入图片描述

import socket
import sys
from time import ctime

def 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()