Android.mk usage environment summary

1. Pre-install the sourceless APK and its dependent libraries into the system, this apk can be upgraded

two,

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1. Pre-install the sourceless APK and its dependent libraries into the system, this apk can be upgraded

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LOCAL_PATH := $(call my-dir)
#Preset aliuyi.apk

include $(CLEAR_VARS)
LOCAL_MODULE := wwwa.apk
LOCAL_SRC_FILES := aliuyi.apk
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_CLASS := APPS
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_MODULE_PATH := $(TARGET_OUT)/app
include $(BUILD_PREBUILT)

#Method 1: Preset resource files such as so
include $(CLEAR_VARS)
LOCAL_MODULE := wanghai.so
LOCAL_SRC_FILES := wanghai.so
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
LOCAL_MODULE_PATH := $(TARGET_OUT)/lib/
include $(BUILD_PREBUILT)

#Method 2: Preset resource files such as so

include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_PREBUILT_LIBS := sdfapk.so sdffff.so
include $(BUILD_MULTI_PREBUILT)

#Method three:

Preset resource files such as so, and add such a sentence in Android.mk. Note: If the path does not exist in this way, the execution of this command will fail, but no error will be reported!

$( shell cp -rf $(LOCAL_PATH)/libs/*.so $(TARGET_OUT)/lib)

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explain:

LOCAL_MODULE specifies the name (full name) of the copied apk. There can be a path in this variable,but the path will also be copied and created. If you are compiling the entire android source code, this apk must have been added to the PRODUCT_PACKAGES variable, otherwise it will not be will be copied to the corresponding location,

LOCAL_MODULE_PATH specifies the path to copy, if the path does not exist, create it yourself

LOCAL_SRC_FILES specifies the source apk

LOCAL_CERTIFICATE := PRESIGNED indicates that the apk has been signed, and the system does not need to sign again;

LOCAL_MODULE_CLASS 指定文件类型，apk文件用APPS, 并且会检查是否是apk文件，动态库so文件用SHARED_LIBRARIES ，bin文件用EXECUTABLES，其他文件用ETC

注意：若是被预置的apk里有so库，需要将从Test.apk的 so库拷贝到 out/target/product/xxx/system/lib/目录下，若无 so 库，则去掉此步；

方法一只能针对一个文件，方法二可以针对多个文件，但只能把文件拷贝到 system/lib/ 下，
Android提供了Prebuilt编译方法，两个文件prebuilt.mk和multi_prebuilt.mk，对应的方法宏是BUILD_PREBUILT和 BUILD_MULTI_PREBUILT。
prebuilt.mk就是prebuilt的具体实现，它是针对独立一个文件的操作，multi_prebuilt.mk 可以针对多个文件的，它对多个文件进行判断，然后调用prebuilt对独立一个文件进行处理。

Android.mk usage environment summary

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