Android Studio创建Include c++项目，并在c++代码引用本地so

so放在lib下，头文件放在src/main/cpp/include下

修改build.gradle

在defaultConfig添加

ndk {
    abiFilters "armeabi", "armeabi-v7a"
}

在android添加

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

add_library( ffmpeg
             SHARED
             IMPORTED)
set_target_properties( ffmpeg
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/armeabi-v7a/libffmpeg.so )

include_directories(src/main/cpp/include)

target_link_libraries( native-lib ffmpeg
                       ${log-lib} )