Android APK reports java.io.ioexception… Error during compilation. Solution

Before confusion compilation, my program can run normally. During confusion compilation, the following errors are reported:

Error:Execution Failed for task ‘:gviews:transformClassesAndResourcesWithProguardForRelease'.

Java.io.IOException: The same input jar [E:\Android\myProgram\angel\libs\alipaySdk-20160825.jar] is specified twice.

first

Take a look at the configuration of this jar in my project. I imported alipaysdk-20160825.jar in LIBS, as shown in the following figure:

Then, this jar is also configured in build.gradle. Compile files ('libs / alipaysdk-20160825. Jar ')

then

Before publishing APK, the APK should be obfuscated and compiled. For alipaysdk-20160825.jar, the obfuscation processing in the proguard-rules.pro file is as follows:

Alipay confusion

This is the confusion code provided by Alipay official. When running the program, it reported the error at the beginning.

processing method

Delete the line - libraryjars LIBS / alipaysdk-20160825.jar in the proguard-rules.pro folder. Only the handling method is written here, and the reason for doing so is not written here, because I can't accurately describe the reasons for such handling. If I say it incorrectly, it will mislead the person. Therefore, the handling method is given here, and the reasons are explored and thought together,

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