今天手机集成腾讯视频又有新需求了，全新的版本，全新的体验。需要我的MD5签名，以前还真没注意过，特此记录下。

public void printSignatureMD5() {    try {        PackageInfo packageInfo = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);        Log.e("getMD5MessageDigest", getMD5MessageDigest(packageInfo.signatures[0].toByteArray()));    } catch (Exception e) {        e.printStackTrace();    }}public static String getMD5MessageDigest(byte[] bytes) {    StringBuffer md5StringBuffer = new StringBuffer();    try {        MessageDigest messageDigest = MessageDigest.getInstance("MD5");        messageDigest.reset();        messageDigest.update(bytes);        byte[] digest = messageDigest.digest();        for (int i = 0; i < digest.length; i++) {            String hexString = Integer.toHexString(digest[i] & 0xff);            if (hexString.length() == 1)                md5StringBuffer.append("0");            md5StringBuffer.append(hexString);        }    } catch (NoSuchAlgorithmException e) {        e.printStackTrace();    }    return md5StringBuffer.toString();}