zouni

获取APP签名信息

public static String getSingInfo(Context context) {
    try {
        PackageInfo packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), PackageManager.GET_SIGNATURES);
        Signature[] signs = packageInfo.signatures;
        Signature sign = signs[0];
        byte[] signByteArray = sign.toByteArray();

        return md5(signByteArray);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

public static String md5(byte[] data){
    if(data == null || data.length == 0){
        return null;
    }
    StringBuffer hexString = new StringBuffer();
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(data);
        byte[] hash = md.digest();
        for (int i = 0; i < hash.length; i++) {
            if ((0xff & hash[i]) < 0x10) {
                hexString.append("0" + Integer.toHexString((0xFF & hash[i])));
            } else {
                hexString.append(Integer.toHexString(0xFF & hash[i]));
            }
        }
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return hexString.toString().toUpperCase();
}