MD5的anroid代码，Android写MD5方法源码参考.

java语言写的MD5获取方法

获取字符串的MD5值源码下载参考：

/**
 * @ClassName OSS
 * @Description OSS
 * @Author TT
 * @Date 2021-06-16 16:42
 * @Version 1.0
 */
package util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Md5 {
    public static char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
            'A', 'B', 'C', 'D', 'E', 'F'};

    //将字符串转化为位
    public static String toHexString(byte[] b) {
        StringBuilder stringBuilder = new StringBuilder(b.length * 2);
        for (int i = 0; i < b.length; i++) { stringBuilder.append(HEX_DIGITS[(b[i] & 0xf0) >>> 4]);
            stringBuilder.append(HEX_DIGITS[b[i] & 0x0f]);
        }
        return stringBuilder.toString();
    }

    public static String md5Hex(String string) {
        try {
            MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
            digest.update(string.getBytes());
            byte messageDigest[] = digest.digest();
            return toHexString(messageDigest);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }

    /**
     * @param str MD5，返回小写的正常md5值
     * @return
     */
    public static String md5(String str) {
        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            byte[] bytes = digest.digest(str.getBytes());
            StringBuilder sb = new StringBuilder();
            for (byte b : bytes) {
                int c = b & 0xff; //负数转换成正数
                String result = Integer.toHexString(c); //把十进制的数转换成十六进制的书
                if(result.length()<2){ sb.append(0); //让十六进制全部都是两位数 } sb.append(result); } return sb.toString(); //返回加密后的密文 } catch (Exception ex) { ex.printStackTrace(); return ""; } } }