Android MD5加密算法

import java.security.MessageDigest; 
import java.security.NoSuchAlgorithmException; 
 
public class MD5 { 
 
    public static String getMD5(String content) { 
        try { 
            MessageDigest digest = MessageDigest.getInstance("MD5"); 
            digest.update(content.getBytes()); 
            return getHashString(digest); 
             
        } catch (NoSuchAlgorithmException e) { 
            e.printStackTrace(); 
        } 
        return null; 
    } 
     
    private static String getHashString(MessageDigest digest) { 
        StringBuilder builder = new StringBuilder(); 
        for (byte b : digest.digest()) { 
            builder.append(Integer.toHexString((b >> 4) & 0xf)); 
            builder.append(Integer.toHexString(b & 0xf)); 
        } 
        return builder.toString(); 
    }