问题 I'm trying to build my java based android app through building as a module inside AOSP source. My app uses android.support.constraint.ConstraintLayout . But, I didn't find a direct way to include constraint-layout dependency in my Android.mk . I've put my project under AOSP_ROOT/packages/apps and tried with this Android.mk : LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_PRIVILEGED_MODULE := true LOCAL_PACKAGE_NAME := MyApp LOCAL_PRIVATE_PLATFORM_APIS :