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一、Android Studio里面进行jni源码编译

1、CMake编译

CMakeLists.txt

# For more information about using CMake with Android Studio, read the# documentation: https://d.android.com/studio/projects/add-native-code.html# Sets the minimum version of CMake required to build the native library.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.        # 设置so文件名称.        SerialPort-lib        # Sets the library as a shared library.        SHARED        # 设置这个so文件为共享.        # Provides a relative path to your source file(s).        # 设置这个so文件为共享.        SerialPort.c)# 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.        SerialPort-lib        # Links the target library to the log library        # included in the NDK.        ${log-lib})

2、build.gradle配置

externalNativeBuild {        cmake {            path "src/main/cpp/CMakeLists.txt"        }    }dependencies {    implementation fileTree(include: ['*.jar', '*.aar'], dir: 'libs')}

二、Android Studio里面进行.so加载

1、将.so文件拷贝到lib目录下armeabi-v7a或者arm64-v8a下

2、build.gradle配置

sourceSets {        main {            jniLibs.srcDirs = ['libs']        }    }

三、Android Studio加载.so遇到的问题

1、E/art: dlopen("XXXXX.so", RTLD_LAZY) failed: dlopen failed: "XXXXXso" is too small to be an ELF executable: only found 0 bytes

解决：降.so文件重新复制覆盖源文件

2、uncautchexception

解决：将.so文件拷贝到lib目录下armeabi-v7a或者arm64-v8a下

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