我正在写一个可以从Http玩的小玩家 . 媒体播放器可以使用 mPlayer.setDataSource(url); 从http流播放mp3，但我想保存此文件 . 我试过以下：
public static void downloadFile(File f, String songUrl, IDownloadListener listener)throws Exception{
URL url = new URL(songUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(5000);
connection.setRequestMethod("GET");
connection.setDoInput(true);
InputStream inStream = connection.getInputStream();
FileOutputStream outStream = new FileOutputStream(f);
Integer fileLength = connection.getContentLength();
try {
byte data[] = new byte[16384];
int lastPercentNotify = -1, curPercent;
int count;
int total = 0;
listener.onFileDescriptorAvailable(outStream.getFD()); //!!!! this willnotify about FD
while ((count = inStream.read(data, 0, data.length)) != -1){
total += count;
outStream.write(data, 0, count);
curPercent = (total * 100) / fileLength;
if (curPercent != lastPercentNotify && listener != null && curPercent % 10 == 0){
listener.onDownload(f.getName(), curPercent, 100);
lastPercentNotify = curPercent;
}
}
}finally {
inStream.close();
outStream.close();
}
}
在我的听众中我做了以下事情：
mPlayer.setDataSource(fileDescr);
//prepare and call mPlayer.start()
但是当我想要改变描述符时，我有各种例外 .
UPD: 我的代码适用于保存文件 . 我麻烦的是播放mp3并同时保存到SD卡 .