IssueTracker

Thank you for the report, and sorry for any inconvenience. While reproducing the issue, one workaround I found is: -keeppackagenames com.example.customview.extra** (i.e., double asterisks, instead of single).

https://www.guardsquare.com/en/products/proguard/manual/usage#filters

R8 currently regards <package_filter> in that directive as <class_filter>. That's why single asterisk---a class name not containing the package separator---doesn't work for now, whereas double asterisks---matches a class name, possibly containing any number of package separators---works. The caveat is, use of, e.g., extra**, will keep all the sub packages as well. :( We'll prepare the fix soon.

Project: r8
Branch: master

commit a9a9e7d1231726094c6e16c2cef1bad887da3bba
Author: Jinseong Jeon <jsjeon@google.com>
Date:   Tue Apr 09 11:49:28 2019

    Reproduce b/130135768: keeppackagenames with asterisks
   
    Bug: 130135768
    Change-Id: I5ab1cdb5148a570a63bdd488358759bb33da700a

M       src/test/java/com/android/tools/r8/TestShrinkerBuilder.java
A       src/test/java/com/android/tools/r8/naming/KeepPackageNamesTest.java
A       src/test/java/com/android/tools/r8/naming/keeppackagenames/Top.java
A       src/test/java/com/android/tools/r8/naming/keeppackagenames/sub/SubClass.java

https://r8-review.googlesource.com/36860

Project: r8
Branch: master

commit 391e2992aee375adf46edbb5e7b098556c8604ed
Author: Søren Gjesse <sgjesse@google.com>
Date:   Fri Apr 12 11:05:43 2019

    New implementation of -keeppackagenames
   
    This implementation collects the list of package names given for
    -keeppackagenames and matches against that in the minifier.
   
    The previous implementation created class matching rules to piggybag
    on the existing matching.
   
    Bug: 130135768
    Change-Id: I5a341e145747a5dec8788a066a0c67d4e259ec77

M       src/main/java/com/android/tools/r8/graph/DexType.java
M       src/main/java/com/android/tools/r8/naming/ClassNameMinifier.java
M       src/main/java/com/android/tools/r8/shaking/ProguardConfiguration.java
M       src/main/java/com/android/tools/r8/shaking/ProguardConfigurationParser.java
D       src/main/java/com/android/tools/r8/shaking/ProguardKeepPackageNamesRule.java
A       src/main/java/com/android/tools/r8/shaking/ProguardPackageMatcher.java
A       src/main/java/com/android/tools/r8/shaking/ProguardPackageNameList.java
M       src/main/java/com/android/tools/r8/shaking/RootSetBuilder.java
M       src/test/java/com/android/tools/r8/naming/KeepPackageNamesTest.java
M       src/test/java/com/android/tools/r8/shaking/ProguardConfigurationParserTest.java
A       src/test/java/com/android/tools/r8/shaking/ProguardPackageNameMatcherTest.java

https://r8-review.googlesource.com/36944