Encrypted SHA1 string for android

StringEncryption.java

package no.rocketfarm.festivalcore.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class StringEncryption {

	 private static String convertToHex(byte[] data) {
	        StringBuilder buf = new StringBuilder();
	        for (byte b : data) {
	            int halfbyte = (b >>> 4) & 0x0F;
	            int two_halfs = 0;
	            do {
	                buf.append((0 <= halfbyte) && (halfbyte <= 9) ? (char) ('0' + halfbyte) : (char) ('a' + (halfbyte - 10)));
	                halfbyte = b & 0x0F;
	            } while (two_halfs++ < 1);
	        }
	        return buf.toString();
	    }

	    public static String SHA1(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException {
	        MessageDigest md = MessageDigest.getInstance("SHA-1");
	        md.update(text.getBytes("iso-8859-1"), 0, text.length());
	        byte[] sha1hash = md.digest();
	        return convertToHex(sha1hash);
	    }
}