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最近引入第三方的jar包进工程，发现光红色的两条并不起作用，加入include $(BUILD_MULTI_PREBUILT) 才起作用，而且顺序很重要，在这里把我参考的两个例子都列出来。
以下为引用例子：
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LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_STATIC_JAVA_LIBRARIES := xsocket jackson-mapper logging jackson-core javatar log4j
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES := $(call all-subdir-java-files)
LOCAL_PACKAGE_NAME := test
LOCAL_CERTIFICATE := platform
include $(BUILD_PACKAGE)
##################################################
include $(CLEAR_VARS)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := xsocket:lib/xSocket-2.8.14.jar \
jackson-mapper:lib/jackson-mapper-asl-1.6.2.jar \
logging:lib/commons-logging.jar \
jackson-core:lib/jackson-core-asl-1.6.2.jar \
javatar:lib/javatar-2.5.jar \
log4j:lib/log4j-1.2.15.jar
include $(BUILD_MULTI_PREBUILT)
# Use the folloing include to make our test apk.
include $(call all-makefiles-under,$(LOCAL_PATH))
以上是我的一个项目中所需要的第三方jar包，主要参考了Android源码中的Calculator应用，该应用也引用了一个第三方的jar包arity-2.1.2.jar。
需要注意的是，当你要引用的jar包不止一个时，有两个关键的地方需要注意的。
LOCAL_STATIC_JAVA_LIBRARIES := xsocket jackson-mapper logging jackson-core javatar log4j
jackson-mapper:lib/jackson-mapper-asl-1.6.2.jar \
logging:lib/commons-logging.jar \
jackson-core:lib/jackson-core-asl-1.6.2.jar \
javatar:lib/javatar-2.5.jar \
log4j:lib/log4j-1.2.15.jar
xsocket jackson-mapper logging jackson-core javatar log4j这几个只是名字，可以随便取。LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES后面才是真正其作用的地方。如：
xsocket:lib/xSocket-2.8.14.jar 引用的是lib目录中的xSocket-2.8.14.jar。
还要注意的是 := 不要写成了+=了哦。
附：编写各种类型的Android.mk，出处我忘记了，是以前浏览是拷贝下来的。如果侵犯了作者的权益，烦请联系我hopetribe@gmail.com。我及时删除。
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。
来源：http://www.cnblogs.com/hopetribe/archive/2012/04/23/2467060.html
include $(CLEAR_VARS)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := ta:libs/TA4AIDL.jar
include $(BUILD_MULTI_PREBUILT)
下面的代码可以加到任一个文件中：
添加共享库：
LOCAL_MODULE := libffmpeg #库的名字
LOCAL_MODULE_TAGS := optional #系统内有效，你可以试一下不加这一行就可以看到出错提示信息。
LOCAL_PREBUILT_LIBS := libffmpeg.so #库的路径。
添加静态库：
include $(CLEAR_VARS)
LOCAL_MODULE := libavcodec
LOCAL_PREBUILT_LIBS := libavcodec.a
LOCAL_MODULE_TAGS := optional
include $(BUILD_MULTI_PREBUILT)
静态库和动态库是对应的，静态库是在链接时使用，动态库是在运行时使用，使用方法：
在要用到对应库的模块的Android.mk文件中加入类似于下面的内容：
静态库（链接时用，它会被复制到out/target/product/generic/obj/STATIC_LIBRARIES/libavcodec_intermediates/目录下）：
LOCAL_WHOLE_STATIC_LIBRARIES += \
libavcodec #这个是模块名（LOCAL_MODULE）
动态库（运行时用，它会被复制到/system/lib/目录下。）：
LOCAL_SHARED_LIBRARIES += \
libffmpeg
include $(call all-makefiles-under,$(LOCAL_PATH)) #这句上调用子目录下的很有Android.mk
来源：http://hi.baidu.com/2400xiaobing/item/ffa78cd51f76d81521e25085
LOCAL_STATIC_JAVA_LIBRARIES := ta
include $(CLEAR_VARS)
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := ta:libs/TA4AIDL.jar
include $(BUILD_MULTI_PREBUILT)
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原文地址：http://www.cnblogs.com/dongdong230/p/4597018.html
