The android_common jars need to be updated for this to work. I'll take a look. Adding some more info to help repro:

### Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Working app on master:
https://github.com/hasadna/hasadna
To run:
bazel build //projects/noloan/app

Non-compiling app, after adding fonts to `res/font`:
https://github.com/hasadna/hasadna/tree/xml_fonts_issue
This branch has just one commit to add the fonts:
https://github.com/hasadna/hasadna/commit/642e82725f0eb868692c5d534b0025fcb878d0df
Same command to run:
bazel build //projects/noloan/app

### What's the output of `bazel info release`?
I've checked this on both versions:
release 0.10.0-2018-03-25 (@b4fcdc3)
development version (based on https://github.com/bazelbuild/bazel/tree/release-0.12.0 from March 29th)

### What's the output of `git remote get-url origin ; git rev-parse master ; git rev-parse HEAD` ?
fatal: not a git repository (or any of the parent directories): .git
fatal: not a git repository (or any of the parent directories): .git
fatal: not a git repository (or any of the parent directories): .git
This is odd, I agree. I can try to clone & rebuild bazel if you want.

###  Have you found anything relevant by searching the web?
Nope.

### Any other information, logs, or outputs that you want to share?
This is the full bazel error:
```
oferb@oferb:~/devel/hasadna$ bazel build //projects/noloan/app
ERROR: /home/oferb/devel/hasadna/projects/noloan/app/BUILD:6:22: in resource_files attribute of android_binary rule //projects/noloan/app:app: 'projects/noloan/app/res/font/heebo_black.ttf' is not in the expected resource directory structure of <resource directory>/{anim,animator,color,drawable,interpolator,layout,menu,mipmap,raw,transition,values,xml}/<file>
ERROR: Analysis of target '//projects/noloan/app:app' failed; build aborted: Analysis of target '//projects/noloan/app:app' failed; build aborted
INFO: Elapsed time: 0.212s
FAILED: Build did NOT complete successfully (0 packages loaded)
```
###  Anything else?
Let me know how best to help you reproduce the problem. I want to make it as easy as possible for you. You can reach me at oferb@ ;)
 Bumping to P2. Update: spent some time upgrading the vendored Android commons dependencies to 26, but that broke a bunch of other stuff and Bazel wouldn't build. Still looking.. Locally I just updated com.android.tools.layoutlib_layoutlib-api to 26 which seems to work.  Not sure what the ramifications are of only updating one lib is. @asiri-uber how did you do that? @jin any update so far? Sorry, I haven't had the chance to work on this since the last time I ran into blockers. I think what @asiri-uber meant was that they switched https://github.com/bazelbuild/bazel/blob/master/third_party/android_common/com.android.tools.layoutlib_layoutlib_25.0.0.jar to 26.0.0 and it worked for them. Do you mind trying that out and seeing if it works for you too?

The corresponding BUILD file entry is here: https://github.com/bazelbuild/bazel/blob/master/third_party/BUILD#L88 That works, although I do want to work out of a Bazel release or head.
So I'll wait for it :) @oferb https://github.com/bazelbuild/bazel/issues/5287
Android: support font in XML
### Description of the problem / feature request / question:

Bazel does not support newly-added Android feature [Fonts in XML](https://developer.android.com/guide/topics/ui/look-and-feel/fonts-in-xml.html)


### Environment info
* Operating System:
macOS 10.13.2

* Bazel version (output of `bazel info release`):
release 0.9.0-homebrew

### Log
```
$ bazel build --verbose_failures :android
ERROR: app/BUILD:11:22: in resource_files attribute of android_binary rule //app:android: 'app/src/main/res/font/heebo_black.ttf' is not in the expected resource directory structure of <resource directory>/{anim,animator,color,drawable,interpolator,layout,menu,mipmap,raw,transition,values,xml}/<file>
ERROR: Analysis of target '//app:android' failed; build aborted: Analysis of target '//app:android' failed; build aborted
INFO: Elapsed time: 0.296s
FAILED: Build did NOT complete successfully (1 packages loaded)
```
src/test/shell/bazel/android/testdata/LICENSE.txt
src/test/shell/bazel/android/BUILD src/test/shell/bazel/android/resource_processing_integration_test.sh
diff --git a/src/test/shell/bazel/android/testdata/LICENSE.txt b/src/test/shell/bazel/android/testdata/LICENSE.txt
new file mode 100755
index 00000000000000..75b52484ea471f
--- /dev/null
+++ b/src/test/shell/bazel/android/testdata/LICENSE.txt
@@ -0,0 +1,202 @@
+
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diff --git a/src/test/shell/bazel/android/BUILD b/src/test/shell/bazel/android/BUILD
index 06245c74996150..359d746e4af83c 100644
--- a/src/test/shell/bazel/android/BUILD
+++ b/src/test/shell/bazel/android/BUILD
@@ -117,3 +117,15 @@ sh_test(
     ],
     shard_count = 4,
 )
+
+sh_test(
+    name = "resource_processing_integration_test",
+    size = "medium",
+    srcs = ["resource_processing_integration_test.sh"],
+    data = [
+        ":android_helper",
+        "//external:android_sdk_for_testing",
+        "//src/test/shell/bazel:test-deps",
+        ":testdata/roboto.ttf",
+    ],
+)
diff --git a/src/test/shell/bazel/android/resource_processing_integration_test.sh b/src/test/shell/bazel/android/resource_processing_integration_test.sh
new file mode 100755
index 00000000000000..1362d7ec983bd2
--- /dev/null
+++ b/src/test/shell/bazel/android/resource_processing_integration_test.sh
@@ -0,0 +1,96 @@
+#!/bin/bash
+#
+# Copyright 2017 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# For these tests to run do the following:
+#
+#   1. Install an Android SDK from https://developer.android.com
+#   2. Set the $ANDROID_HOME environment variable
+#   3. Uncomment the line in WORKSPACE containing android_sdk_repository
+#
+# Note that if the environment is not set up as above android_integration_test
+# will silently be ignored and will be shown as passing.
+
+# Load the test setup defined in the parent directory
+CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+source "${CURRENT_DIR}/android_helper.sh" \
+  || { echo "android_helper.sh not found!" >&2; exit 1; }
+fail_if_no_android_sdk
+
+source "${CURRENT_DIR}/../../integration_test_setup.sh" \
+  || { echo "integration_test_setup.sh not found!" >&2; exit 1; }
+
+function setup_font_resources() {
+  rm java/bazel/BUILD
+
+  cat > java/bazel/BUILD <<EOF
+package(default_visibility = ["//visibility:public"])
+aar_import(
+    name = "aar",
+    aar = "sample.aar",
+)
+android_library(
+    name = "lib",
+    srcs = ["Lib.java"],
+    deps = [":aar"],
+)
+android_binary(
+    name = "bin",
+    srcs = ["MainActivity.java"],
+    resource_files = glob(["res/**"]),
+    manifest = "AndroidManifest.xml",
+    deps = [":lib"],
+)
+EOF
+  mkdir -p java/bazel/res/font
+  cp "$TEST_SRCDIR/io_bazel/src/test/shell/bazel/android/testdata/roboto.ttf" \
+    java/bazel/res/font/
+
+  mkdir -p java/bazel/res/values
+  cat > java/bazel/res/values/styles.xml <<EOF
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <style name="AppTheme">
+      <item name="android:fontFamily">@font/roboto</item>
+  </style>
+</resources>
+EOF
+
+  cat > java/bazel/AndroidManifest.xml <<EOF
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    package="bazel.android">
+    <application
+        android:label="Bazel App"
+        android:theme="@style/AppTheme" >
+        <activity
+            android:name="bazel.MainActivity"
+            android:label="Bazel" />
+    </application>
+</manifest>
+EOF
+}
+
+function test_font_support() {
+  create_new_workspace
+  setup_android_sdk_support
+  create_android_binary
+  setup_font_resources
+
+  assert_build //java/bazel:bin
+}
+
+run_suite "Resource processing integration tests"
