android studio 56 下载网络歌曲 代码

第一步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="请输入歌曲名称"
        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="搜索歌曲"
        tools:layout_editor_absoluteX="264dp"
        tools:layout_editor_absoluteY="8dp" />

    <ProgressBar
        android:id="@+id/progress"
        android:layout_below="@+id/button"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="25dp"
        />
    <TextView
        android:id="@+id/text"
        android:layout_below="@+id/progress"
        android:layout_width="match_parent"
        android:layout_height="20dp"
        android:text="TextView" />
    <ListView
        android:id="@+id/ListName"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/text"
        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" >


    </ListView>

</RelativeLayout>
第二步MainActivity.java
package com.example.mymps001;

import android.annotation.SuppressLint;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.Socket;
import java.net.URL;
import java.net.URLConnection;

public class MainActivity extends AppCompatActivity {
     

    TextView tv;
    ListView ls;
    Button btn;
    EditText edt;
    String NeedFindWords;
    String[] strArr;

    private static final String Path="http://192.168.1.7/song/2.DJ - 侧脸 (言寺).mp3";

    private ProgressBar progressBar;
    private TextView textView;
    private Button button;
    private int FileLength;
    private int DownedFileLength=0;
    private InputStream inputStream;
    private URLConnection connection;
    private OutputStream outputStream;


    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());
            System.out.println((msg.obj).toString());
            strArr = (msg.obj).toString().split("\n");

            ArrayAdapter<String> arrayAdapter= new ArrayAdapter<String> (
                    MainActivity.this, android.R.layout.simple_list_item_1,strArr);
            ls.setAdapter(arrayAdapter);
        }
    };
    @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);
        ls= (ListView) findViewById(R.id.ListName);
        //这个是文件下载控件
        progressBar=(ProgressBar) findViewById(R.id.progress);
        textView=(TextView) findViewById(R.id.text);
        button=(Button) findViewById(R.id.button);

        ls.setOnItemClickListener(new AdapterView.OnItemClickListener() {
     
            private String MusicPath="";
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
     
                System.out.println(id);
                System.out.println("********************************************");
//                Toast.makeText(MainActivity.this,"点击了："+position+"行",Toast.LENGTH_SHORT).show();
                Toast.makeText(MainActivity.this,strArr[position],Toast.LENGTH_SHORT).show();

                MusicPath=strArr[position];
                //开启下载线程
                DownedFileLength=0;
                // TODO Auto-generated method stub
                Thread thread=new Thread(){
     
                    public void run(){
     
                        try {
     
                            DownFile(MusicPath);
                        } catch (Exception e) {
     
                            // TODO: handle exception
                        }
                    }
                };
                thread.start();
//                System.out.println(strArr[position]);
//                System.out.println("********************************************");
            }
        });

//        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();
    }

    private Handler handler2=new Handler()
    {
     
        public void handleMessage(Message msg)
        {
     
            if (!Thread.currentThread().isInterrupted()) {
     
                switch (msg.what) {
     
                    case 0:
                        progressBar.setMax(FileLength);
                        Log.i("文件长度----------->", progressBar.getMax()+"");
                        break;
                    case 1:
                        progressBar.setProgress(DownedFileLength);
                        int x=DownedFileLength*100/FileLength;
                        textView.setText(x+"%");
                        break;
                    case 2:
                        String[]  strs=Path.split("/");
                        int lastSTR=0;
                        for(int i=0,len=strs.length;i<len;i++){
     
                            lastSTR=len;
                            System.out.println(strs[i].toString());
                        }
                        Toast.makeText(getApplicationContext(), "下载完成", Toast.LENGTH_LONG).show();
                        Toast.makeText(getApplicationContext(), strs[lastSTR-1].toString(), Toast.LENGTH_LONG).show();
                        break;

                    default:
                        break;
                }
            }
        }

    };

    private void DownFile(String urlString)
    {
     
        String LastName="";

        /*
         * 连接到服务器
         */

        try {
     
            URL url=new URL(urlString);
            String[] MFileName=urlString.split("/");
            LastName=MFileName[MFileName.length-1];
            System.out.println("***********************"+LastName);
            connection=url.openConnection();
            if (connection.getReadTimeout()==5) {
     
                Log.i("---------->", "当前网络有问题");
                // return;
            }
            inputStream=connection.getInputStream();

        } catch (MalformedURLException e1) {
     
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (IOException e) {
     
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        /*
         * 文件的保存路径和和文件名其中Nobody.mp3是在手机SD卡上要保存的路径，如果不存在则新建
         */
        String savePAth= Environment.getExternalStorageDirectory()+"/DownFile";
        File file1=new File(savePAth);
        if (!file1.exists()) {
     
            file1.mkdir();
        }
        String savePathString=Environment.getExternalStorageDirectory()+"/DownFile/"+LastName;
        File file =new File(savePathString);
        if (!file.exists()) {
     
            try {
     
                file.createNewFile();
            } catch (IOException e) {
     
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        /*
         * 向SD卡中写入文件,用Handle传递线程
         */
        Message message=new Message();
        try {
     
            outputStream=new FileOutputStream(file);
            byte [] buffer=new byte[1024*4];
            FileLength=connection.getContentLength();
            message.what=0;
            handler2.sendMessage(message);
            while (DownedFileLength<FileLength) {
     
                outputStream.write(buffer);
                DownedFileLength+=inputStream.read(buffer);
                Log.i("-------->", DownedFileLength+"");
                Message message1=new Message();
                message1.what=1;
                handler2.sendMessage(message1);
            }
            Message message2=new Message();
            message2.what=2;
            handler2.sendMessage(message2);
        } catch (FileNotFoundException e) {
     
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
     
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}


权限添加
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
       
     android:usesCleartextTraffic="true"