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/** * MD5的工具类 */public class MD5Utils {    public static String getFileMd5(Context context,String path){        try {//            InputStream inputStream = context.getAssets().open(fileName);            FileInputStream inputStream = new FileInputStream(new File(path));            //获取到消息摘要            MessageDigest messageDigest = MessageDigest.getInstance("md5");            byte[] buffer =  new byte[1024];            int len = -1;            while ((len =  inputStream.read(buffer))!=-1){                messageDigest.update(buffer,0,len);            }            byte[] digest = messageDigest.digest();            StringBuffer sb = new StringBuffer();            for(byte b : digest){                int number = b & 0xff;                String hex = Integer.toHexString(number);                if(hex.length() == 1){                    sb.append("0" + hex);                }else{                    sb.append(hex);                }            }            return  sb.toString();        } catch (Exception e) {            e.printStackTrace();        }        return null;    }}

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