在Android中找不到使用DigestUtils的方法 [英] Method not found using DigestUtils in Android

问题描述

我正在尝试使用图书馆 Android 2.3.1使用JDK 1.6，但是在执行应用程序时会收到以下错误：

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:

找不到方法org.apache.commons。 codec.binary.Hex.encodeHexString，从方法org.apache.commons.codec.digest.DigestUtils.shaHex引用

这里有stacktrace：

Here you have the stacktrace:

02-03 10:25:45.153: I/dalvikvm(1230): Could not find method org.apache.commons.codec.binary.Hex.encodeHexString, referenced from method org.apache.commons.codec.digest.DigestUtils.shaHex
02-03 10:25:45.153: W/dalvikvm(1230): VFY: unable to resolve static method 329: Lorg/apache/commons/codec/binary/Hex;.encodeHexString ([B)Ljava/lang/String;
02-03 10:25:45.153: D/dalvikvm(1230): VFY: replacing opcode 0x71 at 0x0004
02-03 10:25:45.153: D/dalvikvm(1230): VFY: dead code 0x0007-0008 in Lorg/apache/commons/codec/digest/DigestUtils;.shaHex ([B)Ljava/lang/String;
02-03 10:25:45.163: D/AndroidRuntime(1230): Shutting down VM
02-03 10:25:45.163: W/dalvikvm(1230): threadid=1: thread exiting with uncaught exception (group=0x40015560)
02-03 10:25:45.173: E/AndroidRuntime(1230): FATAL EXCEPTION: main
02-03 10:25:45.173: E/AndroidRuntime(1230): java.lang.NoSuchMethodError: org.apache.commons.codec.binary.Hex.encodeHexString
02-03 10:25:45.173: E/AndroidRuntime(1230):     at org.apache.commons.codec.digest.DigestUtils.md5Hex(DigestUtils.java:226)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at com.caumons.trainingdininghall.ConnectionProfileActivity.onCreate(ConnectionProfileActivity.java:20)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1586)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:928)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.os.Looper.loop(Looper.java:123)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at android.app.ActivityThread.main(ActivityThread.java:3647)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at java.lang.reflect.Method.invokeNative(Native Method)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at java.lang.reflect.Method.invoke(Method.java:507)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-03 10:25:45.173: E/AndroidRuntime(1230):     at dalvik.system.NativeStart.main(Native Method)

导致异常的代码行是：

String hash = DigestUtils.shaHex（textToHash）;

我在Android之外的Java类中执行了相同的代码，它的工作原理！所以，我不知道为什么当使用Android它不工作...我把库放在我的应用程序的一个新的libs /文件夹，并更新了BuildPath以使用它。如果我尝试使用md5而不是sha1，我得到相同的异常。任何帮助将不胜感激！谢谢。

I have executed the same code in a Java class outside Android and it works! So, I do not know why when working with Android it does not work... I put the libraty inside a new libs/ folder in my app and updated the BuildPath to use it. If I try to use md5 instead of sha1 I get the same exception. Any help would be appreciated! Thank you.

更新：

由于这是一个非常活跃的问题，我已经改变了接受的答案，赞成@ DA25，因为他的解决方案是直截了当的，大量的upvote证明它的工作。

As this is a very active question, I've changed the accepted answer in favour of @DA25, as his solution is straightforward and the high number of upvotes prove that it works.

推荐答案

我遇到了同样的问题，试图在我的Android应用程序中使用DigestUtils。这是我可以通过搜索找到的最好的答案，但是我不愿意重命名更改名称空间的.jar文件。在这个问题上度过了一段时间之后，我找到了一个更容易的方式来解决我的问题。我的代码的问题陈述是

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);

将此语句替换为以下内容，它将工作：

Replace this statement with the following and it will work:

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

同样，对于shaHex示例，您可以将其更改为

Similarly, for shaHex exampl, you can change it to

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

这是有效的，因为即使Android没有encodeHexString（），它确实有encodeHex（）。希望这可以帮助遇到同样问题的人。

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.

这篇关于在Android中找不到使用DigestUtils的方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！