public void saveToSDCard(String name) throws Throwable {
        InputStream inStream = context.getResources().openRawResource(R.raw.beep);
        File file = new File(Environment.getExternalStorageDirectory(), name);
        FileOutputStream fileOutputStream = new FileOutputStream(file);//存入SDCard
        byte[] buffer = new byte[10];
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        int len = 0;
        while((len = inStream.read(buffer)) != -1) {
            outStream.write(buffer, 0, len);
        }
        byte[] bs = outStream.toByteArray();
        fileOutputStream.write(bs);
        outStream.close();
        inStream.close();
        fileOutputStream.flush();
        fileOutputStream.close();
    }