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Android.mk文件用来向编译系统描述如何编译你的源代码。在编译整个工程的情况下，系统所找到的所有的Android.mk将会先存入subdir_makefiles变量中，随后一次性一次性include进整个编译文件中。
(1)Android.mk文件首先需要指定LOCAL_PATH变量，用于查找源文件。
LOCAL_PATH:=$(call my-dir)
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # Build all java files in the java subdirectory LOCAL_SRC_FILES := $(call all-subdir-java-files) # Name of the APK to build LOCAL_PACKAGE_NAME := LocalPackage # Tell it to build an APK include $(BUILD_PACKAGE)
(4)编译一个依赖于静态Java库(static.jar)的应用程序
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # List of static libraries to include in the package LOCAL_STATIC_JAVA_LIBRARIES := static-library # Build all java files in the java subdirectory LOCAL_SRC_FILES := $(call all-subdir-java-files) # Name of the APK to build LOCAL_PACKAGE_NAME := LocalPackage # Tell it to build an APK include $(BUILD_PACKAGE)
(5)编译一个需要用平台的key签名的应用程序
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # Build all java files in the java subdirectory LOCAL_SRC_FILES := $(call all-subdir-java-files) # Name of the APK to build LOCAL_PACKAGE_NAME := LocalPackage LOCAL_CERTIFICATE := platform # Tell it to build an APK include $(BUILD_PACKAGE)
(6)编译一个需要用特定key前面的应用程序
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # Build all java files in the java subdirectory LOCAL_SRC_FILES := $(call all-subdir-java-files) # Name of the APK to build LOCAL_PACKAGE_NAME := LocalPackage LOCAL_CERTIFICATE := vendor/example/certs/app # Tell it to build an APK include $(BUILD_PACKAGE)
(7)添加一个预编译应用程序
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # Module name should match apk name to be installed. LOCAL_MODULE := LocalModuleName LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) include $(BUILD_PREBUILT)
(8)添加一个静态JAVA库
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # Build all java files in the java subdirectory LOCAL_SRC_FILES := $(call all-subdir-java-files) # Any libraries that this library depends on LOCAL_JAVA_LIBRARIES := android.test.runner # The name of the jar file to create LOCAL_MODULE := sample # Build a static jar file. include $(BUILD_STATIC_JAVA_LIBRARY)
(9)编译生成可执行文件
LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_C_INCLUDES += \ $(LOCAL_PATH) LOCAL_SRC_FILES:= \ gpio-server.c LOCAL_SHARED_LIBRARIES := \ libcurl \ libcutils LOCAL_MODULE:= gpio-server include $(BUILD_EXECUTABLE) include $(call all-makefiles-under,$(LOCAL_PATH))
(10)编译生成动态库
LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_SRC_FILES:= \ com_android_server_AlarmManagerService.cpp \ com_android_server_BatteryService.cpp \ com_android_server_InputApplicationHandle.cpp \ com_android_server_InputManager.cpp \ com_android_server_InputWindowHandle.cpp \ com_android_server_LightsService.cpp \ com_android_server_PowerManagerService.cpp \ com_android_server_SystemServer.cpp \ com_android_server_UsbDeviceManager.cpp \ com_android_server_UsbHostManager.cpp \ com_android_server_VibratorService.cpp \ com_android_server_location_GpsLocationProvider.cpp \ com_android_server_connectivity_Vpn.cpp \ com_android_server_ConnectivityService.cpp \ onload.cpp LOCAL_C_INCLUDES += \ $(JNI_H_INCLUDE) \ frameworks/base/services \ frameworks/base/core/jni \ external/skia/include/core LOCAL_SHARED_LIBRARIES := \ libandroid_runtime \ libcutils \ libhardware \ libhardware_legacy \ libnativehelper \ libsystem_server \ libutils \ libui \ libinput \ libskia \ libgui \ libusbhost ifeq ($(WITH_MALLOC_LEAK_CHECK),true) LOCAL_CFLAGS += -DMALLOC_LEAK_CHECK endif LOCAL_MODULE:= libandroid_servers include $(BUILD_SHARED_LIBRARY)
(11)通过Android.mk添加一个编译模块到系统中的顺序如下
| 变量名 | 说明 |
| LOCAL_PATH | 用于确定源码所在的目录，最好把它放在CLEAR_VARS变量引用的前面，因为它不会被清除，每个Android.mk只需要定义 一次即可。 |
| CLEAR_VARS | 它清空了很多以LOCAL_开头的变量（LOCAL_PATH除外）。由于所有的MakeFile都是在一个编译环境下执行的，因此 变量的定义理论上是全局的，在每个模块编译开始前进行清理工作是必要的。 |
| LOCAL_MODULE | 模块名，需保证在整个编译系统中是唯一存在的，而且中间不可以有空格 |
| LOCAL_MODULE_PATH | 模块的输出路径 |
| LOCAL_SRC_FILES | 模块编译过程中涉及到的源文件。如果是JAVA程序，可以考虑调用all-subdir-java-files来一次性添加目录（包括子目录）下所有的java文件 因为有LOCAL_PATH，这里只需要给出文件名（相对路径）即可；而且编译系统有比较强的推导功能，可以自动计算依赖关系。 |
| LOCAL_CC | 用于指定C编译器 |
| LOCAL_CXX | 用于指定C++编译器 |
| LOCAL_CPP_EXTENSION | 用于指定特殊的C++文件后缀名 |
| LOCAL_CFLAGS | C语言编译时的额外选项 |
| LOCAL_CXXFLAGS | C++语言编译时的额外选项 |
| LOCAL_C_INCLUDE | 编译C和C++程序所需要的额外头文件 |
| LOCAL_STATIC_LIBRARIES | 编译所需的静态库列表 |
| LOCAL_SHARED_LIBRARIES | 编译时所需要的动态库列表 |
| LOCAL_JAVA_LIBRARIES | 编译时所需要的JAVA类库 |
| LOCAL_LDLIBS | 编译时所需要的链接选项 |
| LOCAL_COPY_HEADERS | 安装应用程序时所需要复制的头文件列表，需要和LOCAL_COPY_HEARERS_TO变量配合使用 |
| LOCAL_MODULE_CLASS | 标识所编译模块最后放置的位置。ETC表示放置在/system/etc.目录下，APPS表示放置在/system/app目录下，SHARED_LIBRARIES表示放置在/system/lib目录下。如果具体指定，则编译的模块不会放到编译系统中，最后会在out对应product的obj目录下的对应目录中。 |
| LOCAL_MODULE_TAGS | 当前模块所包含的标签，一个模块可以包含多个标签。标签的值可能是eng、user、debug、development、optional。其中，optional是默认标签。 |
| LOCAL_DEX_PREOPT | apk的odex优化开关，默认是false |
| $(call my-dir) | 获取当前文件夹的路径 |
| $(call all-java-files-under,<src>) | 获取指定目录下的所有java文件 |
| $(call all-c-files-under, <src>) | 获取指定目录下的所有c文件 |
| $(call all-Iaidl-files-under, <src>) | 获取指定目录下的所有AIDL文件 |
| $(call all-makefiles-under, <folder>) | 获取指定目录下的所有Make文件 |
| $(call intermediates-dir-for, <class>, <app_name>, <host or target>, <common?>) | 获取Build输入的目标文件夹路径 |
| BUILD_HOST_STATIC_LIBRARY BUILD_HOST_SHARED_LIBRARY BUILD_STATIC_LIBRARY BUILD_RAW_STATIC-LIBRARY BUILD_SHARED_LIBRARY BUILD_EXECUTABLE BUILD_RAW_EXECUTABLE BUILD_HOST_EXECUTABLE BUILD_PACKAGE BUILD_HOST_PREBUILT BUILD_PREBUILT BUILD_MULTI_PREBUILT BUILD_JAVA_LIBRARY BUILD_STATIC_JAVA_LIBRARY BUILD_HOST_JAVA_LIBRARY BUILD_DROIDDOC BUILD_COPY_HEADERS BUILD_KEY_CHAR_MAP |
各种形式的编译模板，如静态、动态库文件，可执行文件，文档等 |
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原文地址：http://www.cnblogs.com/CoderTian/p/5933045.html
