HMAC-SHA1 Utility for Android

gistfile1.java

public static String sha1(String s, String keyString) throws 
	UnsupportedEncodingException, NoSuchAlgorithmException, 
		InvalidKeyException {
	
	SecretKeySpec key = new SecretKeySpec((keyString).getBytes("UTF-8"), "HmacSHA1");
	Mac mac = Mac.getInstance("HmacSHA1");
	mac.init(key);
		
	byte[] bytes = mac.doFinal(s.getBytes("UTF-8"));
	
	return new String( Base64.encodeBase64(bytes) );
}

Base64.encodeBase64 does not existss in android.

replace the line for...
return new String(Base64.encodeToString(bytes, 0));