[英]How can I add a 3rd-party library to an Android AOSP build?
I am trying to add the Jackson JSON library to my AOSP project. 我正在尝试将Jackson JSON库添加到我的AOSP项目中。 I am able to compile my project and flash it to a phone, but I get a runtime error:
我能够编译我的项目并将其刷新到手机,但我收到运行时错误:
E/JavaBinder( 1689): java.lang.NoClassDefFoundError: Failed resolution of: Lcom/fasterxml/jackson/core/JsonFactory;
...
E/JavaBinder( 1689): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.fasterxml.jackson.core.JsonFactory" on path: DexPathList[[zip file "/system/framework/guice.jar", zip file "/system/framework/beanshell.jar", zip file "/system/framework/services.jar", zip file "/system/framework/ethernet-service.jar", zip file "/system/framework/wifi-service.jar"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
I have tried including Jackson both from source, and jar. 我试过从源头和罐子里包括杰克逊。 Here are my Android.mk files for each:
以下是我的每个Android.mk文件:
SOURCE Android.mk 来源Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := $(call all-java-files-under,.)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE:= com.fasterxml.jackson.core
include $(BUILD_JAVA_LIBRARY)
# Copy XML to /system/etc/permissions/
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := com.fasterxml.jackson.core.xml
LOCAL_MODULE_CLASS := ETC
LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)/permissions
LOCAL_SRC_FILES := $(LOCAL_MODULE)
include $(BUILD_PREBUILT)
SOURCE com.fasterxml.jackson.core.xml
(referenced above) SOURCE
com.fasterxml.jackson.core.xml
(上面引用)
<?xml version="1.0" encoding="utf-8"?>
<permissions>
<library name="com.fasterxml.jackson.core.xml"
file="/system/framework/com.fasterxml.jackson.jar" />
</permissions>
JAR Android.mk JAR Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := jackson
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES := jackson-core-2.5.0.jar
LOCAL_MODULE_CLASS := JAVA_LIBRARIES
LOCAL_MODULE_SUFFIX := $(COMMON_JAVA_PACKAGE_SUFFIX)
include $(BUILD_PREBUILT)
I have also added a jackson
entry for in LOCAL_JAVA_LIBRARIES :=
section of the Android.mk file where I want to use Jackson ( frameworks/base/services
). 我还在
LOCAL_JAVA_LIBRARIES :=
Android.mk文件的部分添加了一个jackson
条目,我想使用Jackson( frameworks/base/services
)。 No matter what I've tried, I get a ClassNotFoundException
. 无论我尝试过什么,我都会得到一个
ClassNotFoundException
。
What am I missing? 我错过了什么? Have I done anything unnecessary?
我做了什么不必要的事吗?
To include a 3rd party library from source : 要包含来自源的第三方库:
$ANDROID_BUILD_TOP/external/
(ex: $ANDROID_BUILD_TOP/external/jackson
) $ANDROID_BUILD_TOP/external/
下的目录中(例如: $ANDROID_BUILD_TOP/external/jackson
) Create an Android.mk
file, and place it in the library's folder (ex: $ANDROID_BUILD_TOP/external/jackson/Android.mk
创建一个
Android.mk
文件,并将其放在库的文件夹中(例如: $ANDROID_BUILD_TOP/external/jackson/Android.mk
Contents of Android.mk : Android.mk的内容 :
# required (setup the build environment) LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) # optional step to automate some pre-compilation steps for this library # run `mvn generate-sources` before we compile $(info $(shell (mvn generate-sources -f $(LOCAL_PATH)/pom.xml))) # required (the name of the library we are building) LOCAL_MODULE := jackson # required (paths to all directories that include source code) # note the difference between the := (first line) and += (every other line) LOCAL_SRC_FILES := $(call all-java-files-under, src/main) LOCAL_SRC_FILES += $(call all-java-files-under, target/generated-sources) # required (tell the build system what kind of thing we are building) include $(BUILD_JAVA_LIBRARY)
Add the library to the PRODUCT_BOOT_JARS
section of your mk
file. 将库添加到
mk
文件的PRODUCT_BOOT_JARS
部分。 Which file you edit depends on what you are building (ex: build/target/product/core_minimal.mk
) 您编辑的文件取决于您正在构建的内容(例如:
build/target/product/core_minimal.mk
)
Original 原版的
PRODUCT_BOOT_JARS := \\ okhttp \\ core-junit \\ bouncycastle \\ ext \\ gson
Modified 改性
PRODUCT_BOOT_JARS := \\ okhttp \\ core-junit \\ bouncycastle \\ ext \\ gson \\ jackson
For each submodule of your AOSP project (ex: frameworks/base
), that you want to have access to the library , find the makefile (ex: $ANDROID_BUILD_TOP/frameworks/base/Android.mk
and add an entry for your library to the LOCAL_JAVA_LIBRARIES
line. Example: 对于 您希望访问库的AOSP项目的每个子模块 (例如:
frameworks/base
),找到makefile(例如: $ANDROID_BUILD_TOP/frameworks/base/Android.mk
并为您的库添加一个条目到LOCAL_JAVA_LIBRARIES
行。示例:
Original 原版的
LOCAL_JAVA_LIBRARIES := guice gson
Modified 改性
LOCAL_JAVA_LIBRARIES := guice gson jackson
Compile your project. 编译您的项目。
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