try {

	File file = new File(Environment.getExternalStorageDirectory(),"shuju2");

	if(!file.exists()){

		file.createNewFile();

	}

	FileWriter fw = new FileWriter(file);

	BufferedWriter out = new BufferedWriter(fw);

	out.write(toHexString1(bytes));

	out.close();

	} catch (IOException e) {

	e.printStackTrace();

}

public static String toHexString1(byte[] b){

	StringBuffer buffer = new StringBuffer();

	for (int i = 0; i < b.length; ++i){

	buffer.append(toHexString1(b[i]));

	}

	return buffer.toString();

}

public static String toHexString1(byte b){

		String s = Integer.toHexString(b & 0xFF);

		if (s.length() == 1){

			return "0" + s;

		}else{

			return s;

		}

	}