diff --git a/Android.mk b/Android.mk
new file mode 100755
index 0000000..0d4075f
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,100 @@
+#
+# Copyright (C) 2017 The Android Open Source Project
+#
+# 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.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+LOCAL_MODULE := wallpaper2-glide-target
+LOCAL_SDK_VERSION := current
+LOCAL_SRC_FILES := ../../../prebuilts/maven_repo/bumptech/com/github/bumptech/glide/glide/SNAPSHOT/glide-SNAPSHOT$(COMMON_JAVA_PACKAGE_SUFFIX)
+LOCAL_UNINSTALLABLE_MODULE := true
+include $(BUILD_PREBUILT)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+LOCAL_MODULE := wallpaper2-disklrucache-target
+LOCAL_SDK_VERSION := current
+LOCAL_SRC_FILES := ../../../prebuilts/maven_repo/bumptech/com/github/bumptech/glide/disklrucache/SNAPSHOT/disklrucache-SNAPSHOT$(COMMON_JAVA_PACKAGE_SUFFIX)
+LOCAL_UNINSTALLABLE_MODULE := true
+include $(BUILD_PREBUILT)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+LOCAL_MODULE := wallpaper2-gifdecoder-target
+LOCAL_SDK_VERSION := current
+LOCAL_SRC_FILES := ../../../prebuilts/maven_repo/bumptech/com/github/bumptech/glide/gifdecoder/SNAPSHOT/gifdecoder-SNAPSHOT$(COMMON_JAVA_PACKAGE_SUFFIX)
+LOCAL_UNINSTALLABLE_MODULE := true
+include $(BUILD_PREBUILT)
+
+#
+# Build app code.
+#
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_STATIC_JAVA_LIBRARIES := \
+    android-support-v4 \
+    android-support-v7-appcompat \
+    android-support-v7-cardview \
+    android-support-v7-recyclerview \
+    android-support-compat \
+    android-support-design \
+    android-support-exifinterface \
+    android-support-media-compat \
+    wallpaper2-glide-target \
+    wallpaper2-disklrucache-target \
+    wallpaper2-gifdecoder-target \
+    volley \
+    libbackup \
+    icc_profiles
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src) \
+    $(call all-java-files-under, src_override) \
+
+LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res \
+    $(LOCAL_PATH)/res_override \
+    prebuilts/sdk/current/support/v7/appcompat/res \
+    prebuilts/sdk/current/support/v7/cardview/res \
+    prebuilts/sdk/current/support/v7/recyclerview/res \
+    prebuilts/sdk/current/support/compat/res \
+    prebuilts/sdk/current/support/core-ui/res \
+    prebuilts/sdk/current/support/design/res \
+    prebuilts/sdk/current/support/media-compat/res \
+
+LOCAL_PROGUARD_FLAG_FILES := proguard.flags
+LOCAL_PROGUARD_ENABLED := disabled
+
+LOCAL_AAPT_FLAGS := \
+    --auto-add-overlay \
+    --extra-packages android.support.v4 \
+    --extra-packages android.support.v7.appcompat \
+    --extra-packages android.support.v7.cardview \
+    --extra-packages android.support.v7.recyclerview \
+    --extra-packages android.support.compat \
+    --extra-packages android.support.coreui \
+    --extra-packages android.support.design \
+    --extra-packages android.support.mediacompat \
+    --extra-packages android.support.transition
+
+LOCAL_SDK_VERSION := 27
+LOCAL_PACKAGE_NAME := WallpaperPicker2
+
+include $(BUILD_PACKAGE)
+
+# ==================================================
+include $(call all-makefiles-under,$(LOCAL_PATH))