擷取安卓的SH1安全碼

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 用於擷取手機連絡人 資訊

public static String sHA1(Context context) {    try {        PackageInfo info = context.getPackageManager().getPackageInfo(                context.getPackageName(), PackageManager.GET_SIGNATURES);        byte[] cert = info.signatures[0].toByteArray();        MessageDigest md = MessageDigest.getInstance("SHA1");        byte[] publicKey = md.digest(cert);        StringBuffer hexString = new StringBuffer();        for (int i = 0; i < publicKey.length; i++) {            String appendString = Integer.toHexString(0xFF & publicKey[i])                    .toUpperCase(Locale.US);            if (appendString.length() == 1)                hexString.append("0");            hexString.append(appendString);        }        return hexString.toString();    } catch (PackageManager.NameNotFoundException e) {        e.printStackTrace();    } catch (NoSuchAlgorithmException e) {        e.printStackTrace();    }    return null;}

 

擷取安卓的SH1安全碼