Android jni调用第三方so库和.h文件

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前言

JNI（Java Native Interface）是一个本地编程接口。 它允许在 Java 虚拟机 (VM) 中运行的 Java 代码与使用其他编程语言（例如 C、C++ 和汇编）编写的应用程序和库进行互操作。

Android利用cmake调用第三方so库配合.h文件，进行so库第二次封装

1.将第三方库复制至JniLibs目录下

2.将头文件复制head目录下

可新建一个目录存放so库所关联的.h文件（路径与第三步中在cmake配置有关）

3.在cmake目录下添加第三方库

cmake_minimum_required(VERSION 3.4.1)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
        native-lib

        # Sets the library as a shared library.
        SHARED

        # Provides a relative path to your source file(s).
        src/main/cpp/native-lib.cpp)
# 添加第三方库
add_library(cp
        SHARED
        IMPORTED)
# 配置第三方库链接
set_target_properties(
        cp
        PROPERTIES
        IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libcp.so)
# 添加头文件
include_directories(${CMAKE_SOURCE_DIR}/src/main/head)

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
        log-lib

        # Specifies the name of the NDK library that
        # you want CMake to locate.
        log)

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
        native-lib
        cp//第三方库
        # Links the target library to the log library
        # included in the NDK.
        ${log-lib})

4.导入第三方库头文件，进行方法调用即可

题外话：时隔多日的太阳终于冒头了，近日不是阴雨天就是下雪天，今天终于出太阳啦～ 上一篇：Android ndk开发 -利用ndk-build android.mk生成so库