获取手机唯一标识码并对其MD5加密

项目中获取手机唯一标识码，这里以手机WLAN 的mac地址为唯一标识码。进行MD5加密。

获取mac地址：

WifiManager wm = (WifiManager) getSystemService(WIFI_SERVICE);
String wifiMac = wm.getConnectionInfo().getMacAddress();

//mac地址加密

String wifiMacMd5 = MD5Utils.getMD5(wifiMac);

MD5工具类：

import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;/*** getMD5(String)方法** @author**/public class MD5Utils {public static String getMD5(String string) {MessageDigest md5;try {md5 = MessageDigest.getInstance("MD5");md5.update(string.getBytes());byte[] m = md5.digest();// 加密return getString(m);} catch (NoSuchAlgorithmException e) {e.printStackTrace();return "";}}private static String getString(byte[] b) {StringBuffer sb = new StringBuffer();for (int i = 0; i < b.length; i++) {int number = b[i] & 0xFF;if (number < 0x10)sb.append("0");sb.append(Integer.toHexString(number));}return sb.toString();}}