mMediaPlayer = new MediaPlayer();
   String filename = "/mnt/sdcard/day.3gp";
   FileInputStream fis;
   fis = new FileInputStream(filename);
   BufferedInputStream bis = new BufferedInputStream(fis);

   byte[] buf = new byte[3145728]; // 3MB
   int readCount = -1;
   long size = 0;
   boolean append = true;
   
   filename = "/data/data/com.kpp.video/onefile.3gp";
   File myfile = new File(filename);
   boolean success = myfile.createNewFile();
   Log.i("MyLog", "file create success: " + success);
   int i = 0;
   while (size < 10485760) { // 10M정도까지 받았다면
    Log.i("MyLog","append: "+append);
    fis.skip(size);
    if ((readCount = bis.read(buf)) != -1) {
     FileOutputStream fos = new FileOutputStream(filename, append);
     BufferedOutputStream bos = new BufferedOutputStream(fos);
     bos.write(buf);
     //bos.write(buf, size, readCount);
     size += readCount;
     Log.i("MyLog", "readCount: " + readCount + "  size: "+ size);
     if(i == 0){
     fd = fos.getFD();
     }i++;
     fos.flush();
     // bos.close();
    } else {
     append = false;
     break;
    }
 }
   Log.i("MyLog", "file end");
   bis.close();
   mMediaPlayer.setDataSource(fd);