android studio 56 下载网络歌曲 代码
发布日期:2021-06-24 15:21:44
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第一步activity-main.xml第二步MainActivity.javapackage 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 arrayAdapter= new ArrayAdapter ( 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 ", "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 ", 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 android:usesCleartextTraffic="true"
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