mk文件如下:

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_PACKAGE_NAME := Demo
LOCAL_MODULE_TAGS := optional
LOCAL_PRIVILEGED_MODULE := true
LOCAL_CERTIFICATE := platform

LOCAL_PRIVATE_PLATFORM_APIS := true

LOCAL_SRC_FILES := $(call all-java-files-under, src/main/java)
LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/src/main/res
LOCAL_MANIFEST_FILE := src/main/AndroidManifest.xml

LOCAL_DEX_PREOPT := false
LOCAL_PROGUARD_ENABLED := disabled

LOCAL_USE_AAPT2 := true

LOCAL_STATIC_ANDROID_LIBRARIES := \
    android-arch-lifecycle-extensions \
    android-support-v7-recyclerview \
    android-support-v7-appcompat \
    android-support-constraint-layout


LOCAL_STATIC_JAVA_LIBRARIES := \
        as-classes \

include $(BUILD_PACKAGE)

include $(CLEAR_VARS)

LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
        as-classes:libs/classes.jar \

include $(BUILD_MULTI_PREBUILT)

注:涉及到的三方jar包需要放到app/libs目录下.