android studio 用cmake加入FFMPEG so及头文件

1. 下载最新的android studio, 同时更新cmake

2. 把要加载的so放到相应cpu架构目录下，头文件也一样，如果有多个头文件，也放到一个文件夹下，跟so的根目录同级，如下图：

3. 修改app下的build.gradle,在 android{}中修改

android {
       compileSdkVersion 22
       buildToolsVersion "25.0.2"
       defaultConfig {
        applicationId "com.android.test"
        minSdkVersion 19
        targetSdkVersion 22
        versionCode 0
        versionName 1
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        externalNativeBuild {
            ndk {
                abiFilters 'armeabi'
            }
        }


      externalNativeBuild {
        cmake {
            path "CMakeLists.txt"
        }
      }


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

}

4. CMakeList.txt文件放在app目录下，跟build.gradle同级

5. 修改CMakeList.txt

make_minimum_required(VERSION 3.4.1)

add_library( # Sets the name of the library.
             VideoPlayer  

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/VideoPlayer.c )


add_library( avcodec-57
             SHARED
             IMPORTED )
set_target_properties( avcodec-57
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/armeabi/libavcodec-57.so )

add_library( avformat-57
             SHARED
             IMPORTED )
set_target_properties( avformat-57
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/armeabi/libavformat-57.so )

add_library( avutil-55
             SHARED
             IMPORTED )
set_target_properties( avutil-55
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/armeabi/libavutil-55.so )

add_library( swresample-2
             SHARED
             IMPORTED )
set_target_properties( swresample-2
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/armeabi/libswresample-2.so )

add_library( swscale-4
             SHARED
             IMPORTED )
set_target_properties( swscale-4
                       PROPERTIES IMPORTED_LOCATION
                       ../../../../libs/armeabi/libswscale-4.so )

include_directories( libs/include )


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 )

target_link_libraries( # Specifies the target library.
                       VideoPlayer

                       android

                       avcodec-57

                       avformat-57

                       avutil-55

                       swresample-2

                       swscale-4

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

 

6.引用SO