Buck doesn't package java resources in to the android_library rule.

If you add java resources to an android_library rule like so:

resources = glob([
     'resources/**',
]),
resources_root = 'resources',

They do not get packaged in to the final APK, but if this same android_library rule depends on a prebuilt_jar which contains java resources, they will get packaged in to the final APK.

Here is a sample with a repro of this issue: https://github.com/fbsamples/bucksamples/compare/master...runningcode:no/resources?expand=1

[dreiss]

Discussed this with @kageiit and @runningcode . Here’s a summary:

• Doing this is generally a bad idea because it’s bad for build perf and runtime perf.
• Gradle does this by default, so we should probably support it.
• The way to do it is add an option to android_binary to add itself to com.facebook.buck.android.AndroidPackageableCollection#pathsToThirdPartyJars (probably after renaming it).

[kageiit]

They do get picked up if android_library depends on prebuilt_jars though