V2签名apk预置到android系统中，编译后会出现无法对齐，无法运行的问题。可以采用拷贝的方式将apk和库文件预置到系统中。

Android.mk写法如下：

LOCAL_PATH:= $(call my-dir)

preinstall_apks := $(notdir $(shell find $(LOCAL_PATH) -name *.apk))
$(warning "the value of preinstall_apks is $(preinstall_apks)")
preinstall_apks_name :=$(patsubst %.apk,%,$(preinstall_apks))
ifneq (,$(strip $(preinstall_apks)))
$(foreach t,$(preinstall_apks_name), \
$(shell mkdir -p $(TARGET_OUT)/priv-app/$(t)) \
$(shell cp $(LOCAL_PATH)/$(t).apk $(TARGET_OUT)/priv-app/$(t)) \
$(shell mkdir -p $(TARGET_OUT)/priv-app/$(t)/lib/arm64) \
$(shell cp -rf $(LOCAL_PATH)/lib/arm64-v8a/* $(TARGET_OUT)/priv-app/$(t)/lib/arm64) \
)