Question

如何通过url从服务器下载音频文件并将其保存到SD卡。

我正在使用以下代码：

public void uploadPithyFromServer(String imageURL, String fileName) {

    try {
        URL url = new URL(GlobalConfig.AppUrl + imageURL);
        File file = new File(fileName);

        Log.d("ImageManager", "download begining");
        Log.d("ImageManager", "download url:" + url);
        Log.d("ImageManager", "downloaded file name:" + fileName);
        /* Open a connection to that URL. */
        URLConnection con = url.openConnection();

        InputStream is = con.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is, 1024 * 50);
        FileOutputStream fos = new FileOutputStream("/sdcard/" + file);
        byte[] buffer = new byte[1024 * 50];

        int current = 0;
        while ((current = bis.read(buffer)) != -1) {
            fos.write(buffer, 0, current);
        }

        fos.flush();
        fos.close();
        bis.close();

    } catch (IOException e) {
        Log.d("ImageManager", "Error: " + e);
    }

}

上面的代码没有下载音频文件。如果在清单文件中使用任何权限，请告诉我..（我已经使用过互联网许可）请帮忙

感谢..

Answer 1

你还必须添加

android.permission.WRITE_EXTERNAL_STORAGE

如果您希望将数据写入SD卡，请

。

如果你有任何IOExceptions，

也会发布你的logcat输出。

Answer 2

您的示例未指定请求方法和一些mimetypes和东西在这里您可以找到mimetypes http://www.webmaster-toolkit.com/mime-types.shtml的列表找到与您相关的mimetypes，并将其添加到代码中指定的mimetypes中。

哦，顺便说一下，下面是普通的Java代码。您必须替换在SD卡上存储文件的位。目前没有模拟器或手机来测试该部件另请参阅此处的sd存储权限文档：http://developer.android.com/reference/android/Manifest.permission_group.html#STORAGE

  public static void downloadFile(String hostUrl, String filename)
  {
    try {      
    File file = new File(filename);
    URL server = new URL(hostUrl + file.getName());


    HttpURLConnection connection = (HttpURLConnection)server.openConnection();
    connection.setRequestMethod("GET");
    connection.setDoInput(true);
    connection.setDoOutput(true);
    connection.setUseCaches(false);
    connection.addRequestProperty("Accept","image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/msword, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/x-shockwave-flash, */*");
    connection.addRequestProperty("Accept-Language", "en-us,zh-cn;q=0.5");
    connection.addRequestProperty("Accept-Encoding", "gzip, deflate");

    connection.connect();
    InputStream is = connection.getInputStream();
    OutputStream os = new FileOutputStream("c:/temp/" + file.getName());

    byte[] buffer = new byte[1024];
    int byteReaded = is.read(buffer);
    while(byteReaded != -1)
    {
      os.write(buffer,0,byteReaded);
      byteReaded = is.read(buffer);
    }

   os.close();

  } catch (IOException e) {
    e.printStackTrace();
  }

然后打电话，

 downloadFile("http://localhost/images/bullets/", "bullet_green.gif" );

编辑：坏编码我。将输入InputStream包装在BufferedInputStream中。无需指定缓冲区等默认值很好。

我如何通过网址从服务器下载音频文件

2 个答案: