Same here. I use Android Studio to edit xml layouts, so this is unfortunate.
It seems that adding "--use-gradle-process-resources --split-projects" to generate_clank_gradle.sh command fixes this. Are there any pitfalls in adding these options? Right now I generate project with the following command:

clank/bin/generate_clank_gradle.sh --output-directory out/AndroidDebug --use-gradle-process-resources --split-projects

Looking into this. You shouldn't have to add those flags to just edit xml layouts.

Those flags cause a module to be generated for each gn target, which means imports/refactoring will not work cross-module, and Android Studio may give you lots of redlines editing java.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dc177240b50784d9fe81d654e129275028e6d97f

commit dc177240b50784d9fe81d654e129275028e6d97f
Author: wnwen <wnwen@chromium.org>
Date: Wed May 17 17:18:54 2017

Android: Add resources back to Android Studio

Resources were not collected for the pseudo all module before. Adding it
back, but skipping the generated resources folders.

BUG= 722302 

Review-Url: https://codereview.chromium.org/2888923002
Cr-Commit-Position: refs/heads/master@{#472485}

[modify] https://crrev.com/dc177240b50784d9fe81d654e129275028e6d97f/build/android/gradle/generate_gradle.py

Let me know if this works for you. Excluded generated resources for now since this is just to enable editing.

If you want all the resources for a specific apk, just generate for that apk, and you should get back everything (use --target).

Works for me, thanks!