diff --git a/Android.mk b/Android.mk
index ab445ac..f3eb244 100644
--- a/Android.mk
+++ b/Android.mk
@@ -29,37 +29,52 @@
 include $(BUILD_PREBUILT)
 
 #
-# Build rule for Launcher3 app.
+# Build rule for Launcher3 dependencies lib.
 #
 include $(CLEAR_VARS)
-
+LOCAL_USE_AAPT2 := true
+LOCAL_AAPT2_ONLY := true
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_STATIC_JAVA_LIBRARIES := \
+LOCAL_STATIC_ANDROID_LIBRARIES := \
     android-support-v4 \
     android-support-v7-recyclerview \
     android-support-dynamic-animation
 
 LOCAL_SRC_FILES := \
-    $(call all-java-files-under, src) \
-    $(call all-java-files-under, src_ui_overrides) \
-    $(call all-java-files-under, src_flags) \
     $(call all-proto-files-under, protos) \
     $(call all-proto-files-under, proto_overrides)
 
-LOCAL_RESOURCE_DIR := \
-    $(LOCAL_PATH)/res \
-    prebuilts/sdk/current/support/v7/recyclerview/res \
+LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
 
-LOCAL_PROGUARD_FLAG_FILES := proguard.flags
+LOCAL_PROGUARD_ENABLED := disabled
 
 LOCAL_PROTOC_OPTIMIZE_TYPE := nano
 LOCAL_PROTOC_FLAGS := --proto_path=$(LOCAL_PATH)/protos/ --proto_path=$(LOCAL_PATH)/proto_overrides/
 LOCAL_PROTO_JAVA_OUTPUT_PARAMS := enum_style=java
 
-LOCAL_AAPT_FLAGS := \
-    --auto-add-overlay \
-    --extra-packages android.support.v7.recyclerview \
+LOCAL_SDK_VERSION := current
+LOCAL_MIN_SDK_VERSION := 21
+LOCAL_MODULE := Launcher3CommonDepsLib
+LOCAL_PRIVILEGED_MODULE := true
+LOCAL_MANIFEST_FILE := AndroidManifest-common.xml
+
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+#
+# Build rule for Launcher3 app.
+#
+include $(CLEAR_VARS)
+LOCAL_USE_AAPT2 := true
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_STATIC_ANDROID_LIBRARIES := Launcher3CommonDepsLib
+LOCAL_SRC_FILES := \
+    $(call all-java-files-under, src) \
+    $(call all-java-files-under, src_ui_overrides) \
+    $(call all-java-files-under, src_flags)
+
+LOCAL_PROGUARD_FLAG_FILES := proguard.flags
 
 LOCAL_SDK_VERSION := current
 LOCAL_MIN_SDK_VERSION := 21
@@ -77,36 +92,19 @@
 # Build rule for Launcher3 Go app for Android Go devices.
 #
 include $(CLEAR_VARS)
-
+LOCAL_USE_AAPT2 := true
 LOCAL_MODULE_TAGS := optional
-
-LOCAL_STATIC_JAVA_LIBRARIES := \
-    android-support-v4 \
-    android-support-v7-recyclerview \
-    android-support-dynamic-animation
+LOCAL_STATIC_ANDROID_LIBRARIES := Launcher3CommonDepsLib
 
 LOCAL_SRC_FILES := \
     $(call all-java-files-under, src) \
     $(call all-java-files-under, src_ui_overrides) \
-    $(call all-java-files-under, go/src_flags) \
-    $(call all-proto-files-under, protos) \
-    $(call all-proto-files-under, proto_overrides)
+    $(call all-java-files-under, go/src_flags)
 
-LOCAL_RESOURCE_DIR := \
-    $(LOCAL_PATH)/go/res \
-    $(LOCAL_PATH)/res \
-    prebuilts/sdk/current/support/v7/recyclerview/res \
+LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/go/res
 
 LOCAL_PROGUARD_FLAG_FILES := proguard.flags
 
-LOCAL_PROTOC_OPTIMIZE_TYPE := nano
-LOCAL_PROTOC_FLAGS := --proto_path=$(LOCAL_PATH)/protos/ --proto_path=$(LOCAL_PATH)/proto_overrides/
-LOCAL_PROTO_JAVA_OUTPUT_PARAMS := enum_style=java
-
-LOCAL_AAPT_FLAGS := \
-    --auto-add-overlay \
-    --extra-packages android.support.v7.recyclerview \
-
 LOCAL_SDK_VERSION := current
 LOCAL_MIN_SDK_VERSION := 21
 LOCAL_PACKAGE_NAME := Launcher3Go
@@ -118,52 +116,54 @@
     $(LOCAL_PATH)/AndroidManifest-common.xml
 
 LOCAL_MANIFEST_FILE := go/AndroidManifest.xml
-
 LOCAL_JACK_COVERAGE_INCLUDE_FILTER := com.android.launcher3.*
-
 include $(BUILD_PACKAGE)
 
 #
+# Build rule for Quickstep library.
+#
+include $(CLEAR_VARS)
+LOCAL_USE_AAPT2 := true
+LOCAL_AAPT2_ONLY := true
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_STATIC_JAVA_LIBRARIES := libSharedSystemUI
+LOCAL_STATIC_ANDROID_LIBRARIES := Launcher3CommonDepsLib
+
+LOCAL_SRC_FILES := \
+    $(call all-java-files-under, src) \
+    $(call all-java-files-under, quickstep/src) \
+    $(call all-java-files-under, src_flags)
+
+LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/quickstep/res
+LOCAL_PROGUARD_ENABLED := disabled
+
+LOCAL_SDK_VERSION := system_current
+LOCAL_MIN_SDK_VERSION := 26
+LOCAL_MODULE := Launcher3QuickStepLib
+LOCAL_PRIVILEGED_MODULE := true
+
+LOCAL_MANIFEST_FILE := quickstep/AndroidManifest.xml
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+#
 # Build rule for Quickstep app.
 #
 include $(CLEAR_VARS)
-
+LOCAL_USE_AAPT2 := true
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_STATIC_JAVA_LIBRARIES := \
-    android-support-v4 \
-    android-support-v7-recyclerview \
-    android-support-dynamic-animation \
-    libSharedSystemUI
-
-LOCAL_SRC_FILES := \
-    $(call all-java-files-under, src) \
-    $(call all-java-files-under, quickstep/src) \
-    $(call all-java-files-under, src_flags) \
-    $(call all-proto-files-under, protos) \
-    $(call all-proto-files-under, proto_overrides)
-
-LOCAL_RESOURCE_DIR := \
-    $(LOCAL_PATH)/quickstep/res \
-    $(LOCAL_PATH)/res \
-    prebuilts/sdk/current/support/v7/recyclerview/res \
-
+LOCAL_STATIC_ANDROID_LIBRARIES := Launcher3QuickStepLib
 LOCAL_PROGUARD_ENABLED := disabled
 
-LOCAL_PROTOC_OPTIMIZE_TYPE := nano
-LOCAL_PROTOC_FLAGS := --proto_path=$(LOCAL_PATH)/protos/ --proto_path=$(LOCAL_PATH)/proto_overrides/
-LOCAL_PROTO_JAVA_OUTPUT_PARAMS := enum_style=java
-
-LOCAL_AAPT_FLAGS := \
-    --auto-add-overlay \
-    --extra-packages android.support.v7.recyclerview \
-
 LOCAL_SDK_VERSION := system_current
 LOCAL_MIN_SDK_VERSION := 26
 LOCAL_PACKAGE_NAME := Launcher3QuickStep
 LOCAL_PRIVILEGED_MODULE := true
 LOCAL_OVERRIDES_PACKAGES := Home Launcher2 Launcher3
 
+LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/quickstep/res
+
 LOCAL_FULL_LIBS_MANIFEST_FILES := \
     $(LOCAL_PATH)/AndroidManifest.xml \
     $(LOCAL_PATH)/AndroidManifest-common.xml
@@ -173,42 +173,28 @@
 
 include $(BUILD_PACKAGE)
 
+
 #
 # Build rule for Launcher3 Go app with quickstep for Android Go devices.
 #
 include $(CLEAR_VARS)
-
+LOCAL_USE_AAPT2 := true
 LOCAL_MODULE_TAGS := optional
 
-LOCAL_STATIC_JAVA_LIBRARIES := \
-    android-support-v4 \
-    android-support-v7-recyclerview \
-    android-support-dynamic-animation \
-    libSharedSystemUI
+LOCAL_STATIC_JAVA_LIBRARIES := libSharedSystemUI
+LOCAL_STATIC_ANDROID_LIBRARIES := Launcher3CommonDepsLib
 
 LOCAL_SRC_FILES := \
     $(call all-java-files-under, src) \
     $(call all-java-files-under, quickstep/src) \
-    $(call all-java-files-under, go/src_flags) \
-    $(call all-proto-files-under, protos) \
-    $(call all-proto-files-under, proto_overrides)
+    $(call all-java-files-under, go/src_flags)
 
 LOCAL_RESOURCE_DIR := \
     $(LOCAL_PATH)/quickstep/res \
-    $(LOCAL_PATH)/go/res \
-    $(LOCAL_PATH)/res \
-    prebuilts/sdk/current/support/v7/recyclerview/res \
+    $(LOCAL_PATH)/go/res
 
 LOCAL_PROGUARD_ENABLED := disabled
 
-LOCAL_PROTOC_OPTIMIZE_TYPE := nano
-LOCAL_PROTOC_FLAGS := --proto_path=$(LOCAL_PATH)/protos/ --proto_path=$(LOCAL_PATH)/proto_overrides/
-LOCAL_PROTO_JAVA_OUTPUT_PARAMS := enum_style=java
-
-LOCAL_AAPT_FLAGS := \
-    --auto-add-overlay \
-    --extra-packages android.support.v7.recyclerview \
-
 LOCAL_SDK_VERSION := system_current
 LOCAL_MIN_SDK_VERSION := 26
 LOCAL_PACKAGE_NAME := Launcher3QuickStepGo
@@ -222,7 +208,6 @@
 
 LOCAL_MANIFEST_FILE := quickstep/AndroidManifest.xml
 LOCAL_JACK_COVERAGE_INCLUDE_FILTER := com.android.launcher3.*
-
 include $(BUILD_PACKAGE)