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1.Android.mk文件首先需要指定LOCAL_PATH变量，用于查找源文件。由于一般情况下Android.mk和需要编译的源文件在同一目录下，所以定义成如下形式：
LOCAL_PATH:=$(call my-dir)
上面的语句的意思是将LOCAL_PATH变量定义成本文件所在目录路径。
2. Android.mk中可以定义多个编译模块，每个编译模块都是以include $(CLEAR_VARS)开始，以include $(BUILD_XXX)结束。
include $(CLEAR_VARS)
CLEAR_VARS由编译系统提供，指定让GNU MAKEFILE为你清除除LOCAL_PATH以外的所有LOCAL_XXX变量，如LOCAL_MODULE、LOCAL_SRC_FILES、 LOCAL_SHARED_LIBRARIES、LOCAL_STATIC_LIBRARIES等
include $(BUILD_STATIC_LIBRARY)表示编译成静态库
include $(BUILD_SHARED_LIBRARY)表示编译成动态库。
include $(BUILD_EXECUTABLE)表示编译成可执行程序
3.举例如下(frameworks/base/libs/audioflinger/Android.mk)
(1).
LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) ifeq ($(AUDIO_POLICY_TEST),true) ENABLE_AUDIO_DUMP := true endif LOCAL_SRC_FILES:= AudioHardwareGeneric.cpp AudioHardwareStub.cpp AudioHardwareInterface.cpp ifeq ($(ENABLE_AUDIO_DUMP),true) LOCAL_SRC_FILES += AudioDumpInterface.cpp LOCAL_CFLAGS += -DENABLE_AUDIO_DUMP endif LOCAL_SHARED_LIBRARIES := libcutils libutils libbinder libmedia libhardware_legacy ifeq ($(strip $(BOARD_USES_GENERIC_AUDIO)),true) LOCAL_CFLAGS += -DGENERIC_AUDIO endif LOCAL_MODULE:= libaudiointerface ifeq ($(BOARD_HAVE_BLUETOOTH),true) LOCAL_SRC_FILES += A2dpAudioInterface.cpp LOCAL_SHARED_LIBRARIES += liba2dp LOCAL_CFLAGS += -DWITH_BLUETOOTH -DWITH_A2DP LOCAL_C_INCLUDES += $(call include-path-for, bluez) endifinclude $(BUILD_STATIC_LIBRARY) 模块一编译成静态库
(2)
include $(CLEAR_VARS) LOCAL_SRC_FILES:= AudioPolicyManagerBase.cpp LOCAL_SHARED_LIBRARIES := libcutils libutils libmedia ifeq ($(TARGET_SIMULATOR),true) LOCAL_LDLIBS += -ldl else LOCAL_SHARED_LIBRARIES += libdl endif LOCAL_MODULE:= libaudiopolicybase ifeq ($(BOARD_HAVE_BLUETOOTH),true) LOCAL_CFLAGS += -DWITH_A2DP endif ifeq ($(AUDIO_POLICY_TEST),true) LOCAL_CFLAGS += -DAUDIO_POLICY_TEST endif include $(BUILD_STATIC_LIBRARY) 模块二编译成静态库
(3)
include $(CLEAR_VARS) LOCAL_SRC_FILES:= AudioFlinger.cpp AudioMixer.cpp.arm AudioResampler.cpp.arm AudioResamplerSinc.cpp.arm AudioResamplerCubic.cpp.arm AudioPolicyService.cpp LOCAL_SHARED_LIBRARIES := libcutils libutils libbinder libmedia libhardware_legacy ifeq ($(strip $(BOARD_USES_GENERIC_AUDIO)),true) LOCAL_STATIC_LIBRARIES += libaudiointerface libaudiopolicybase LOCAL_CFLAGS += -DGENERIC_AUDIO else LOCAL_SHARED_LIBRARIES += libaudio libaudiopolicy endif ifeq ($(TARGET_SIMULATOR),true) LOCAL_LDLIBS += -ldl else LOCAL_SHARED_LIBRARIES += libdl endif LOCAL_MODULE:= libaudioflinger ifeq ($(BOARD_HAVE_BLUETOOTH),true) LOCAL_CFLAGS += -DWITH_BLUETOOTH -DWITH_A2DP LOCAL_SHARED_LIBRARIES += liba2dp endif ifeq ($(AUDIO_POLICY_TEST),true) LOCAL_CFLAGS += -DAUDIO_POLICY_TEST endif ifeq ($(TARGET_SIMULATOR),true) ifeq ($(HOST_OS),linux) LOCAL_LDLIBS += -lrt -lpthread endif endif ifeq ($(BOARD_USE_LVMX),true) LOCAL_CFLAGS += -DLVMX LOCAL_C_INCLUDES += vendor/nxp LOCAL_STATIC_LIBRARIES += liblifevibes LOCAL_SHARED_LIBRARIES += liblvmxservice # LOCAL_SHARED_LIBRARIES += liblvmxipc endif include $(BUILD_SHARED_LIBRARY) 模块三编译成动态库
更多Android.mk的 用法见 :http://blog.csdn.net/fengbingchun/article/details/38705519
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)
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)
注：LOCAL_STATIC_JAVA_LIBRARIES 后面应是你的APK程序所需要的JAVA库的JAR文件名。
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)
注：LOCAL_CERTIFICATE 后面应该是签名文件的文件名
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)
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) LOCAL_CERTIFICATE := platform include $(BUILD_PREBUILT)
LOCAL_PATH := $(my-dir) include $(CLEAR_VARS) LOCAL_MODULE := baiduinput_android_v1.1_1000e LOCAL_SRC_FILES := $(LOCAL_MODULE).apk LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE := platform include $(BUILD_PREBUILT) ################################################################# ####### copy the library to /system/lib ######################### ################################################################# include $(CLEAR_VARS) LOCAL_MODULE := libinputcore.so LOCAL_MODULE_CLASS := SHARED_LIBRARIES LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES) LOCAL_SRC_FILES := lib/$(LOCAL_MODULE) OVERRIDE_BUILD_MODULE_PATH := $(TARGET_OUT_INTERMEDIATE_LIBRARIES) include $(BUILD_PREBUILT)
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)
注：LOCAL_JAVA_LIBRARIES表示生成的java库的jar文件名。
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原文地址：http://www.cnblogs.com/larack/p/4643663.html
