经过 2 天的研究，我没有找到任何解决问题的方法：/
我想下载一个 mp3 文件，该文件只有在浏览器中调用 URL 后才会返回。
我不能给你实际的网址，因为由于权利限制，我不允许这样做，但它的形式是：
http://wscompany.name.com/downloadws/getDlFile/mdkHdKy97RppVWOsIOdDBuG/audio/1478
如您所见，此 URL 没有 mp3 扩展名。因此，如果我将这种 URL 放在 windows 上的浏览器中，它会返回一个 MP3 以保存到磁盘上，这很好。但是如果我想在 android 中调用这个 URL 来下载返回的最终文件（mp3），它就不起作用。
我尝试使用直接包含 mp3 文件的 url 并且效果很好（例如http://www.mediacollege.com/downloads/sound-effects/urban/factory/Factory_External_01.mp3），但没有 mp3 的 url扩展，即使它确实返回一个 mp3，我希望你明白我的意思。
有谁知道如何在android中做到这一点？
这是我的代码，使用 AsyncTask，由
new Download(MyActivity.this, urlToCall).execute();
和下载 AsyncTask ：
public class Download extends AsyncTask<String, Void, String>
{
ProgressDialog mProgressDialog;
Context context;
String urlDownload;
public Download(Context context,String url)
{
this.context = context;
this.urlDownload=url;
}
protected void onPreExecute()
{
mProgressDialog = ProgressDialog.show(context, "","Please wait, Download for " + urlDownload );
Log.v("DOWNLOAD", "Wait for downloading url : " + urlDownload);
}
protected String doInBackground(String... params)
{
try
{
//URL url = new URL("http://www.mediacollege.com/downloads/sound-effects/urban/factory/Factory_External_01.mp3");
URL url = new URL(urlDownload);
Log.w( "DOWNLOAD" , "URL TO CALL : " + url.toString());
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
//set up some things on the connection
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
File folder = new File(Environment.getExternalStorageDirectory()+ "/MyDownloaded/") ;
boolean success = true;
if (!folder.exists()) {
success = folder.mkdir();
}
File file = new File(folder,"somefile.mp3");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
//this is the total size of the file
int totalSize = urlConnection.getContentLength();
//variable to store total downloaded bytes
int downloadedSize = 0;
//create a buffer...
byte[] buffer = new byte[1024];
int bufferLength = 0; //used to store a temporary size of the buffer
//now, read through the input buffer and write the contents to the file
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
//add the data in the buffer to the file in the file output stream (the file on the sd card
fileOutput.write(buffer, 0, bufferLength);
//add up the size so we know how much is downloaded
downloadedSize += bufferLength;
//this is where you would do something to report the prgress, like this maybe
//updateProgress(downloadedSize, totalSize);
Log.w( "DOWNLOAD" , "progress " + downloadedSize + " / " + totalSize);
}
//close the output stream when done
fileOutput.close();
//catch some possible errors...
}
catch (MalformedURLException e)
{
Log.e( "DOWNLOAD" , "ERROR : " + e );
}
catch (IOException e)
{
Log.e( "DOWNLOAD" , "ERROR : " + e );
}
return "done";
}
private void publishProgress( int i )
{
Log.v("DOWNLOAD", "PROGRESS ... " + i);
}
protected void onPostExecute(String result)
{
if (result.equals("done"))
mProgressDialog.dismiss();
}
提前谢谢你，我希望有人能帮助我:)
开发者