Andoid DigestUtils.md5Hed("") Class Not Found Error_digestutils.md5hex 无效-优快云博客

本文解决了在Android应用中使用DigestUtils库时出现的方法未找到错误。通过简单的代码修改即可绕过此问题，实现md5和sha哈希值的计算。

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from http://stackoverflow.com/questions/9126567/method-not-found-using-digestutils-in-android

I am trying to use the library DigestUtils in Android 2.3.1 using JDK 1.6, however I get the following error when executing the app:

Could not find method org.apache.commons.codec.binary.Hex.encodeHexString, referenced from method org.apache.commons.codec.digest.DigestUtils.shaHex

解决方法

I ran into the same issue trying to use DigestUtils in my Android app. This was the best answer I could find by searching, but I was reluctant to rebuild the .jar file with the namespace changed. After spending some time on this issue, I found an easier way to solve the problem for my case. The problem statement for my code was

String s = DigestUtils.md5Hex(data);

Replace this statement with the following and it will work:

String s = new String(Hex.encodeHex(DigestUtils.md5(data)));

Similarly, for shaHex exampl, you can change it to

String hash = new String(Hex.encodeHex(DigestUtils.sha("textToHash");

This works because even though Android does not have encodeHexString(), it does have encodeHex(). Hope this would help others who run into the same issue.