Android/hash/sha1

sha1

    public static String sha1(String string) {
        StringBuilder stringBuilder = new StringBuilder();

        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-1");
            byte[] bytes = string.getBytes("UTF-8");
            digest.update(bytes, 0, bytes.length);
            bytes = digest.digest();

            for (final byte b : bytes) {
                stringBuilder.append(String.format("%02X", b));
            }

            return stringBuilder.toString().toLowerCase(Locale.US);
        } catch (Exception e) {
            return "";
        }
    }

https://github.com/mopub/mopub-android-sdk/blob/master/mopub-sdk/mopub-sdk-base/src/main/java/com/mopub/common/util/Utils.java