如何导入jar包？如何在IDEA中导入jar包

步骤如下：

1首先在我们开发的某个module上点击右键，然后打开module设置。

2选择左侧的libraries选项。

3右侧区域的上方，点击绿色小加号。

4选择本机中存储的jar包，之后选择要导入的具体module。

5添加完成会显示当前已经导入的jar包信息。

6由代码提示可以看出，导入的代码可以正常使用了。

步骤如下： 1、右键点击你需要添加jar包的项目。 2、选择“Properties”。 3、然后选择对话框中的“Java Build Path”。 4、选择“Libraries”选项卡，然后点击右边的“Add External JARS“，然后找到你的jar所存放的路径，选择需要添加的jar包。

Android.mk添加第三方jar包

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

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

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。

一、编译一个简单的APK

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)

二、编译一个依赖静态.jar文件的APK

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。

三、编译一个需要platform key签名的APK

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

四、编译一个需要特殊vendor key签名的APK

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)

五、装载一个普通的第三方APK

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)

六、装载需要.so（动态库）的第三方apk

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)

七、编译一个静态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)

注：LOCAL_JAVA_LIBRARIES表示生成的java库的jar文件名。

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