如何下载MP3文件 [英] How to download an MP3 file

问题描述

我想用下载一个MP3文件中的的AsyncTask 或线程。

I want to download an mp3 file using an AsyncTask or a thread.

我怎样才能做到这一点？

How can I do this?

推荐答案

您可以做这样的事情...

You can do something like this...

当你决定开始下载：

new Thread(new Runnable()
  {
  @Override
  public void run()
       {
       File out;
       Downloader DDL;
       DDL=new Downloader();
       out=new File(Environment.getExternalStorageDirectory() + "/DestFileName.txt");
       DDL.DownloadFile("SourceURL",out);

       }
    }).start();

在哪里下载器类

Where the downloader class is

public class Downloader {

public void Downloader() 
        {
    // TODO Auto-generated method stub
    }

public boolean DownloadFile(String url, File outputFile) 
    {
    try {
      URL u = new URL(url);
      URLConnection conn = u.openConnection();
      int contentLength = conn.getContentLength();

      DataInputStream stream = new DataInputStream(u.openStream());

      byte[] buffer = new byte[contentLength];
      stream.readFully(buffer);
      stream.close();

      DataOutputStream fos = new DataOutputStream(new FileOutputStream(outputFile));
      fos.write(buffer);
      fos.flush();
      fos.close();
      } 
    catch(FileNotFoundException e) 
      {
      return false; 
      } 
    catch (IOException e) 
      {
      return false; 
      }

    return true;
    }
}

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