mMusicSourceFile = new File(MUSIC_FILE_PATH, mCurrentPlayMusic.getMusicName()+".tmp");  //按照SourceFile下载
          mMusicDescFile = new File(MUSIC_FILE_PATH, mCurrentPlayMusic.getMusicName());

          mClient.downloadFile(new HttpGet(mCurrentPlayMusic.getMusicPath()), mMusicSourceFile)

          //下载成功后
          mMusicSourceFile.renameTo(mMusicDescFile);

                int len, mHasRead = 0;
                byte[] buffer = new byte[8192];
                final long size = response.getEntity().getContentLength();

                BufferedOutputStream outputStream = null;
                InputStream inputStream = response.getEntity().getContent();
                try {
                    outputStream = new BufferedOutputStream(new FileOutputStream(mFile));

                    while (!Thread.interrupted() && (len = inputStream.read(buffer)) != -1) {
                        outputStream.write(buffer, 0, len);
                        mHasRead += len;
                    }
                    outputStream.flush();

                    return mHasRead == size;
                } finally {
                    if (outputStream != null)
                        outputStream.close();
                    if (inputStream != null)
                        inputStream.close();
                }