Proguard: can't find referenced class

Question

There are a few questions around but no solution that works for me. I thought it was suppose to be easy to use. I just get a console full of can\'t find referenced cla

Answer 1

In my case Android Studio froze while doing ProGuard on release build. I killed it. And after the restart I started to see "can't find referenced class" warnings.

solution: I closed Android Studio, deleted .gradle folder from my project folder, then deleted gradle global cache (%USER_HOME%.gradle/caches). After reopening the project, caches was rebuild and everything started to work again.

Answer 2

If you have an error such as:

Warning: com.package...: can't find referenced class com.secondpackage....Classname

Just add to your file proguard-android.txt:

#if it is class:
-keep class com.package.*{ *; }
#or if it is interface:
-keep interface com.package.*{ *; }
#or if it is a class that extends from any other
-keep class * extends com.example.Model
#or if you know only and of className
-keep class **Starter { *; }
#or if you want to keep only fields of classes
-keepclassmembers class com.package.** {
   *;
}

Also if you dont want to see all of notes in log use:

-dontnote com.package.**

This file name is written in build Gradle

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

Or if you want to add many files for example use the following repo And for add all of files:

 buildTypes {
        release {
            minifyEnabled true

            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
            proguardFiles fileTree(include: ['*.pro'], dir: '../libraries').asList().toArray()
        }

libraries folder should be at D:\workspace\MyProject\libraries

Answer 3

Add to your config:

-libraryjars org.apache.jar // name of your jars.
-libraryjars org.w3c.jar

If it does not help add:

-dontwarn org.apache.** tag

or just ignore warnings (highly unrecommended since it could cause your app to crash at runtime over unsatisfied dependencies):

-ignorewarnings 

This doc will help you : http://proguard.sourceforge.net/manual/troubleshooting.html

Answer 4

If you are using library projects, than you should add -libraryjars to your library proguard config

Answer 5

From what I can remember, it means you have referenced the Jar files in the wrong way.

Also, if your username (ME) contains spaces C:/Users/ME/android-sdks/tools/proguard/proguard-android.txt:proguard-project.txt Proguard will break in "funny" ways. Move android-sdk to C:\android-sdk and save yourself headache.