Building app with proguard fails - Warning: class [com/appsflyer/r.class] unexpectedly contains class [com.appsflyer.R]

[klamborowski]

Hi,

I'm trying to integrate AppsFlyerSDK to my android app, but building application with proguard fails.

First, I have added dependencies to my build.gradle file:

implementation 'com.appsflyer:af-android-sdk:4.9.0'
implementation 'com.android.installreferrer:installreferrer:1.0'

And the following lines to my proguard file:

-dontwarn com.android.installreferrer
-keep class com.appsflyer.** { *; }

Unfortunately, when build process reaches proguard step, the following warning occurs and build fails.

ProGuard, version 6.1.0 beta2
Reading input...
Reading program jar [C:\Projects\application-android\app\build\intermediates\transforms\mergeJavaRes\prod\release\0.jar] (filtered)
Reading program jar [C:\Projects\application-android\app\build\intermediates\transforms\AspectTransform\prod\release\1.jar] (filtered)
Warning: class [com/appsflyer/r.class] unexpectedly contains class [com.appsflyer.R]
Reading library jar [C:\Users\Admin\AppData\Local\Android\Sdk\platforms\android-28\android.jar]
Reading library jar [C:\Users\Admin\AppData\Local\Android\Sdk\build-tools\28.0.3\core-lambda-stubs.jar]
Reading library jar [C:\Users\Admin\AppData\Local\Android\Sdk\platforms\android-28\optional\org.apache.http.legacy.jar]
Reading library jar [C:\Users\Admin\AppData\Local\Android\Sdk\platforms\android-28\optional\android.test.mock.jar]
Reading library jar [C:\Users\Admin\AppData\Local\Android\Sdk\platforms\android-28\optional\android.test.base.jar]
Reading library jar [C:\Users\Admin\AppData\Local\Android\Sdk\platforms\android-28\optional\android.test.runner.jar]
Warning: there were 1 classes in incorrectly named files.
         You should make sure all file names correspond to their class names.
         The directory hierarchies must correspond to the package hierarchies.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unexpectedclass)
         If you don't mind the mentioned classes not being written out,
         you could try your luck using the '-ignorewarnings' option.
Warning: Exception while processing task java.io.IOException: Please correct the above warnings first.
Thread(Tasks limiter_2): destruction
> Task :app:transformClassesAndResourcesWithProguardForProdRelease FAILED

When I add -dontwarn com.appsflyer.** to proguard file build process ends with success, but running app causes the following error:

2019-04-17 14:34:06.112 E/AndroidRuntime: FATAL EXCEPTION: Thread-21
    Process: pl.application, PID: 18355
    java.lang.RuntimeException: An error occurred while executing doInBackground()
        at android.os.AsyncTask$3.done(AsyncTask.java:353)
        at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
        at java.util.concurrent.FutureTask.run(FutureTask.java:271)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
        at com.appsflyer.AFExecutor$3$5.run(:30)
        at java.lang.Thread.run(Thread.java:764)
     Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/appsflyer/r;
        at com.appsflyer.AppsFlyerLib.ˏ(:1119)
        at com.appsflyer.AFDeepLinkManager$3.ॱ(:3029)
        at com.appsflyer.AppsFlyerLib$3.ˊ(:445)
        at com.appsflyer.m$c.ˋ(:181)
        at com.appsflyer.m$c.doInBackground(:164)
        at android.os.AsyncTask$2.call(AsyncTask.java:333)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
        at com.appsflyer.AFExecutor$3$5.run(:30) 
        at java.lang.Thread.run(Thread.java:764) 
     Caused by: java.lang.ClassNotFoundException: Didn't find class "com.appsflyer.r" on path: DexPathList[[zip file "/data/app/pl.application-YzH9kA_8z_dQFv_2qIXymA==/base.apk"],nativeLibraryDirectories=[/data/app/pl.application-YzH9kA_8z_dQFv_2qIXymA==/lib/arm64, /data/app/pl.application-YzH9kA_8z_dQFv_2qIXymA==/base.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at com.appsflyer.AppsFlyerLib.ˏ(:1119) 
        at com.appsflyer.AFDeepLinkManager$3.ॱ(:3029) 
        at com.appsflyer.AppsFlyerLib$3.ˊ(:445) 
        at com.appsflyer.m$c.ˋ(:181) 
        at com.appsflyer.m$c.doInBackground(:164) 
        at android.os.AsyncTask$2.call(AsyncTask.java:333) 
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
        at com.appsflyer.AFExecutor$3$5.run(:30) 
        at java.lang.Thread.run(Thread.java:764) 

After short investigation I have found that both com/appsflyer/r and com/appsflyer/R exists in class.dex from my generated apk file.

Has any of you encountered a similar problem and found a solution?

[okonor]

I have the same issue. Have you managed to find any solution?

[martppa]

I am facing the same issue. :/

[xuuhaoo]

I am facing the same issue too, and somebody said the downgrade SDK version to 4.8.19 is worked. I have no tried this.