Signed apk getting crashed in proguard enable

Question

I am trying to use proguard in my app set the proguard to true and then the problem starts I am importing lib when I use proguard by following this -keepnames class com.somepackage.* with my package name the app is getting getting crashed when I try to use the signed apk. I know this iS a dumb question but I am stuck at this for last 5 hr not able to find an easy solution as I am using about 20 lib. I followed this also. Plz guide me in this how can I do this?

This is my proguard rule class code

-keepnames class beatbox.neelay.dummybeat.*
-keepnames com.srx.widget.*
-keepnames de.hdodenhof.circleimageview.CircleImageView.*
-keepnames com.bumptech.glide.*
-keepnames com.romainpiel.shimmer.*
-keepnames com.vansuita.gaussianblur.GaussianBlur
-keepnames com.antonyt.infiniteviewpager.InfinitePagerAdapter
-keepnames com.antonyt.infiniteviewpager.InfiniteViewPager
-keepnames com.eftimoff.viewpagertransformers.CubeOutTransformer
-keepnames com.ms.square.android.glassview.GlassView
-keepnames me.alexrs.fontpagertitlestrip.lib.FontPagerTitleStrip

I am not able to generate any signed apk now . the error is.

Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.

Job failed, see logs for details

any hint will be helpful. console output

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.

  Job failed, see logs for details

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Editing build.gradle

apply plugin: 'com.android.application'

android {
compileSdkVersion 25
buildToolsVersion "25.0.1"
defaultConfig {
    applicationId "beatbox.neelay.dummybeat"
    minSdkVersion 16
    targetSdkVersion 25
    versionCode 1
    versionName "1.0"
    renderscriptTargetApi 24
    renderscriptSupportModeEnabled true
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    vectorDrawables.useSupportLibrary = true
}
lintOptions {
    checkReleaseBuilds false
    abortOnError false
}
buildTypes {
    release {
        shrinkResources true
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

repositories {
jcenter()
mavenCentral()
maven { url "https://jitpack.io" }
maven { url 'http://Manabu-GT.github.com/GlassView/mvn-repo' }
}

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
    exclude group: 'com.android.support', module: 'support-annotations'
})
compile project(':foldingtabbar')
compile 'com.android.support:appcompat-v7:25.2.0'
compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha7'
compile 'com.android.support:design:25.2.0'
compile 'com.github.bumptech.glide:glide:3.7.0'
compile 'com.intuit.sdp:sdp-android:1.0.4'
compile 'com.leo.simplearcloader:simplearcloader:1.0.1'
compile 'com.ms.square:glassview:0.1.0'
compile 'de.hdodenhof:circleimageview:2.1.0'
compile 'com.romainpiel.shimmer:library:1.4.0@aar'
compile 'com.github.StephenVinouze:ShapeView:1.1.0'
compile 'com.eftimoff:android-viewpager-transformers:1.0.1@aar'
compile 'com.github.antonyt:InfiniteViewPager:v1.0.0'
compile 'me.alexrs:font-pager-titlestrip:1.0.0'
compile 'com.github.florent37:arclayout:1.0.1'
compile 'com.android.support:cardview-v7:25.1.0'
compile 'com.android.support:support-v4:25.1.0'
compile 'com.github.jrvansuita:GaussianBlur:v1.0.2'
compile 'com.google.code.gson:gson:2.7'
compile 'com.android.support:support-vector-drawable:25.2.0'
testCompile 'junit:junit:4.12'
}

another way i tried for proguard-rule.pro

-keepnames class beatbox.neelay.dummybeat.**{*;}
-keepnames class com.srx.widget.**{*;}
-keepnames class de.hdodenhof.circleimageview.CircleImageView.**{*;}
-keepnames class com.bumptech.glide.**{*;}
-keepnames class com.romainpiel.shimmer.**{*;}
-keepnames class com.vansuita.gaussianblur.**{*;}
-keepnames class com.antonyt.infiniteviewpager.**{*;}
-keepnames class com.eftimoff.viewpagertransformers.**{*;}
-keepnames class com.ms.square.android.glassview.**{*;}
-keepnames class me.alexrs.fontpagertitlestrip.lib.FontPagerTitleStrip**{*;}

the dependency tree

Answer 1

Reason : Not every Class or Library are optimized with Proguard enabled , So what Proguard do is that it removes classes if they are not optimize which results crash and bugs in project.

Solution : In your proguard.cfg file keep that classes or library which are not supported by progaurd . Try the catch all described here :
Try adding :

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

Or , if you are using v4 lib :

-dontwarn android.support.v4.**
-keep class android.support.v4.** { *; }
-dontwarn android.support.v7.**
-keep class android.support.v7.** { *; }

If you are using latest android studio you might found this as proguard-rules.pro

In your case try using -dontwarn as well with classname. Like your error show that it can not optimize circleimageview Library . so try to add this as well :

-dontwarn hdodenhof.**
-keep class hdodenhof.**

If still not working than downgrade your circleimageview library :
compile 'de.hdodenhof:circleimageview:1.3.0' This is working for me.

Answer 2

1) Keep all annotations

-keepattributes SourceFile,LineNumberTable,*Annotation*,EnclosingMethod,Signature,Exceptions,InnerClasses

2) Keep if you have any pojos or models and classes which are using for network call

Ex:

-keep class com.example.android.models.**
-keepclassmembers class com.example.android.models.** {
      *;
}
-keepclassmembers class com.example.android.network.** {
  public void set*(***);
  public *** get*();
  public *** is*();
}

3) For all the libraries you are using keep below proguard rules

Ex:

-dontwarn com.zl.reik.dilatingdotsprogressbar.**
-keep class com.zl.reik.dilatingdotsprogressbar.**{*;}
-keep interface com.zl.reik.dilatingdotsprogressbar.**{*;}

You even need to keep similar proguard rules for "foldingtabbar", as It is also a library

If the above solution does not solve, run ./gradlew app:dependencies in your repository and Send me the list of dependencies

Answer 3

Having the same version for all the support libraries is also very important. Sometimes libraries have recursive dependencies, where each has a different version which can lead to this error. Run:

./gradlew app:dependencies

to see the dependencies for each library and check whether they all have the same version. I already see, that you use 25.1.0 and 25.2.0 versions of support libraries. In addition, some of your libraries are old, thus, they probably use old versions.

Try to use:

-keep class beatbox.neelay.dummybeat.**{*;}
-dontwarn beatbox.neelay.dummybeat.**

instead of:

-keepnames beatbox.neelay.dummybeat.**{*;}