错误:生成APK时，任务':app:transformClassesAndResourcesWithProguardForRelease'的执行失败 [英] Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease' while generating APK

问题描述

我已经生成了一个Android应用程序的APK(作为尝试)，但我没有任何问题，该APK已正确生成.

现在，我想在生成APK时混淆代码，因此我在build.gradle文件的release块上使用了以下行.

minifyEnabled true

问题在于，现在它引发了以下错误:

错误:任务':app:transformClassesAndResourcesWithProguardForRelease'的执行失败. java.io.IOException:请首先更正以上警告.

有很多警告.更确切地说，是1018条警告.

其中大多数是这样的:

警告:com.itextpdf.text.pdf.security.PdfPKCS7:找不到引用的类org.spongycastle.asn1.tsp.MessageImprint

或

警告:com.github.mikephil.charting.data.realm.base.RealmBaseDataSet:找不到引用的类io.realm.Sort

总是相同的错误.找不到引用类的类.

我正在使用 MPAndroidChart ，所以我认为是这样相关(由于警告中显示的软件包名称)，但我无法更正这些警告.

作为证明，我尝试使用以下方法保留课程:

-keep public class com.itextpdf.text.pdf.**

在我的proguard-rules.pro文件上，但是我仍然有相同的警告.

我在build.gradle文件上的release部分是:

release {
    minifyEnabled true
    proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}

我在混淆代码时会丢失某些东西吗?

提前谢谢！

最后，我发现MPAndroidChart具有 文档 ，其中介绍了如何配置Proguard.

具有以下配置:

-keep class com.github.mikephil.charting.** { *; }
-dontwarn io.realm.**

我能够创建没有任何警告的模糊APK.

此外，我注意到itextpdf是我过去使用的库，但是现在我不需要它，因此我只需要从gradle文件的依赖项中删除它，警告也就消失了. /p>

I have generated an APK of my Android application (as a try) and I did not have any problem, the APK has been generated correctly.

Now, I want to obfuscate my code while generating the APK so I used the following line on my release block on build.gradle file.

minifyEnabled true

The problem is that now it throws me the following error:

Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'. java.io.IOException: Please correct the above warnings first.

with a lot of warnings. To be more exact, 1018 warnings.

Most of them are like:

Warning:com.itextpdf.text.pdf.security.PdfPKCS7: can't find referenced class org.spongycastle.asn1.tsp.MessageImprint

or

Warning:com.github.mikephil.charting.data.realm.base.RealmBaseDataSet: can't find referenced class io.realm.Sort

Always is the same error. A class that cannot find a referenced class.

I am using MPAndroidChart so I think it is something related (because of the name of the packages that appears on the warnings) but I am not able to correct those warnings.

EDIT: As a prove, I have tried keeping the classes using:

-keep public class com.itextpdf.text.pdf.**

on my proguard-rules.pro file but I still have the same warnings.

My release section on build.gradle file is:

release {
    minifyEnabled true
    proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}

Am I missing something while obfuscating my code?

Thanks in advance!

解决方案

Finally, I have found that MPAndroidChart has a document in which tells you how to configure Proguard.

With the following configuration:

-keep class com.github.mikephil.charting.** { *; }
-dontwarn io.realm.**

I was able to create the obfuscate APK without any warnings.

Also, I have noticed that itextpdf was a library that I used on the past but I did not need it nowadays so I just have to delete it from the dependencies on my gradle file and the warnings also have dissapeared.

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