Java 如何使用android从URL下载音频

我是android新手，对于培训，我想创建一个从现有api下载音频的应用程序

我正在获取从api下载文件的链接，但无法正确下载

我试过下载管理器，虽然它说下载了，但它甚至没有下载

以下是主要代码：

public void Download(String link)
{
    downloadManager = (DownloadManager)m_context.getSystemService(m_context.DOWNLOAD_SERVICE);
       Uri Download_Uri = Uri.parse(link);
       DownloadManager.Request request = new DownloadManager.Request(Download_Uri);

       //Restrict the types of networks over which this download may proceed.
       request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
       //Set whether this download may proceed over a roaming connection.
       request.setAllowedOverRoaming(false);
       //Set the title of this download, to be displayed in notifications (if enabled).
       request.setTitle("Downloading " + m_name);
       //Set a description of this download, to be displayed in notifications (if enabled)
       request.setDescription("Downloader");
       //Set the local destination for the downloaded file to a path within the application's external files directory
       request.setDestinationInExternalFilesDir(m_context, Environment.DIRECTORY_DOWNLOADS, m_name +".mp3");

       //Enqueue a new download and same the referenceId
       downloadReference = downloadManager.enqueue(request);
}

m_上下文是主要活动 链接是包含要下载的文件的url。 我正在使用广播接收器查看下载是否完成，所以我尝试打开它，但什么也没发生

我也尝试过在没有下载管理器的情况下下载它，尽管它下载了，但大小非常小（1-15KB），但有时（不是大多数时间，可能是5%）它会提供完整的音频（根据大小和时间） 代码如下：

public void Download(final String link)
{
    try {
        Thread t= new Thread(){
            public void run() {
                int count;

                 try {

                        URL url = new URL(link);
                        URLConnection conexion = url.openConnection();                  
                        Thread.sleep(20000);
                        conexion.connect();
                        // this will be useful so that you can show a tipical 0-100% progress bar
                        int lenghtOfFile = conexion.getContentLength();

                        // downlod the file                         
                        InputStream input = new BufferedInputStream(url.openStream());                          

                        String storageState = Environment.getExternalStorageState();
                        if (storageState.equals(Environment.MEDIA_MOUNTED)) {
                            File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/Music",m_name+".mp3");
                        OutputStream output = new FileOutputStream(file);

                        byte data[] = new byte[1024];

                        long total = 0;

                        while ((count = input.read(data)) != -1) {
                            total += count;                                                         
                            output.write(data, 0, count);
                        }

                        output.flush();
                        output.close();
                        input.close();
                        }
                    } catch (Exception e) {
                        downloadSuccess = false;
                 e.printStackTrace();
                    }
            }
        };
        t.start();  
        t.join();
        } catch (InterruptedException e) {
            downloadSuccess = false;
            e.printStackTrace();
        }
}

您将看到thread.sleep，我假设响应需要一点时间来处理，但即使是一分钟也没有完成

任何指导都将不胜感激 多谢各位

更新： 有一种称为GZIPInputStream的东西，在gzip中对未能正确下载的文件进行编码 代码的和平：

 if ("gzip".equals(httpConn.getContentEncoding())) {
                            BufferedReader in= new BufferedReader(new InputStreamReader(new GZIPInputStream(httpConn.getInputStream())));                               
                            StringBuilder sb = new StringBuilder();
                            String read;
                            while ((read = in.readLine()) != null){
                                sb.append(read);
                            }                               
                        }

它仍然不能帮助我以正确的方式下载，但我认为这是一条正确的道路，而且任何帮助都会很好。多谢各位