写在20110619：Android.mk编写格式
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional (模式：user eng optional)
LOCAL_STATIC_JAVA_LIBRARIES := libA libB libC (外部库自定义名称，与后面对应)
LOCAL_SRC_FILES := $(call all-java-files-under, src)
LOCAL_SRC_FILES += \
aidl文件路径\Interface_Name.aidl (外部aidl)
LOCAL_PACKAGE_NAME := Project_Name
LOCAL_CERTIFICATE := shared （4.2之后的其他应用需要访问需要互相签名）
LOCAL_JAVA_LIBRARIES := 系统内部库名称
LOCAL_JAVA_LIBRARIES += 系统内部库名称 （后面加“\”回车可以继续添加）
LOCAL_PROGUARD_ENABLED := disabled （禁止编译优化）
LOCAL_SDK_VERSION := current （当前SDK版本）
include $(BUILD_PACKAGE)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := libA:libs/×××外部包1.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += \
libB:libs/×××外部包2.jar \
libC:libs/×××外部包3.jar
include $(BUILD_MULTI_PREBUILT)
# Use the following include to make our test apk.
include $(call all-makefiles-under,$(LOCAL_PATH))
不想把某个应用编译进去，只需在该应用的Android.mk中更改语句
ifneq($TARGET_PRODUCT,Project_Name)
……
endif
