使用Proguard签署APK时发生错误

Question

I am trying to generate a signed apk with proguard ON. I have the following line the build.gradle for the proguard

buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt')
        }
    }

But while generating the signed apk, I get the following error

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

The app builds fine but the issue is only while signing the apk.

Answer 1

Add this line into build.gradle file

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

And add below line into the 'proguard-project.txt'

-dontwarn android.support.v7.**
-keep class android.support.v7.** { *; }
-keep interface android.support.v7.** { *; }

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