我想通了这个问题：

开拓proguard-rules.pro为您的项目，将其添加到底部：

  -dontwarn java.nio.file.Files
-dontwarn java.nio.file.Path
-dontwarn java.nio.file.OpenOption
-dontwarn组织。codehaus.mojo.animal_sniffer.IgnoreJRERequirement
 

我基本上是怎么解决的，这是我试图运行我的'释放'模式的应用程序，并得到了一堆类似这样的家伙在这里的错误：的 https://github.com/square/okio/issues/144

我pretty多跟着他所说的和固定的。

希望这可以帮助别人产生自己的APK的！

点击这里查看更多详细信息：

Error:Execution失败的任务：应用程序：packageRelease。 ＆GT;无法计算/../AndroidStudioProjects/../classes.jar哈希

I have to protect my app by enabling Proguard obfuscation in Android Studio. I have searched for the process of how to apply it but i did not get any clear solution. When i try it, i always get an error. So can anyone tell me the clear steps to apply it in my app?

I am doing this by the following steps:

1. In Android Studio, open up an Android project.

2. Change to Project View.

3. Change the following line:

   minifyEnable false to minifyEnable true

4. Set ProGuard Rules(optional)

   4.1 In Project View, select the proguard-rules.pro file.

   4.2 Add in the following lines to tell ProGuard not to obfuscate certain classes.

   -keepclassmembers class com.dom925.xxxx 
   {
     public *
   }
   

Error that I am getting by following the steps are

Error:Execution failed for task ':app:packageRelease'. Unable to compute hash of D:\Android\Pojectname\app\build\intermediates\classes-proguard\release\classes.jar

I figured out the problem:

Open up the proguard-rules.pro for your project and add this to the bottom:

-dontwarn java.nio.file.Files
-dontwarn java.nio.file.Path
-dontwarn java.nio.file.OpenOption
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

Basically how I solved it was this I tried to run my app in 'release' mode and got a bunch of errors similar to this guy here: https://github.com/square/okio/issues/144

I pretty much followed what he said and fixed it.

Hope this can help others with generating their APK's!

visit more detail here :

Error:Execution failed for task ':app:packageRelease'. > Unable to compute hash of /../AndroidStudioProjects/../classes.jar