学习雷神Android HelloWold CMake版本

雷神Android HelloWorld

地址http://blog.csdn.NET/leixiaohua1020/article/details/47008825

步骤

1，开启Android studio，新建项目，“Include C++ support”打钩，一直下一步，最后完成。

2，雷神工程下，编好的so库，拷贝至libs目录，如下。

3，雷神工程下，头文件，拷贝至main目录，如下。

4，CMakeLists.txt修改

4.1设置工程绝对路径 set(ProjectRoot E:/Android/hello)

4.2添加库

add_library( avcodec
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       avcodec

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libavcodec-56.so )

4.3添加头 include_directories( src/main/include/ )

4.4修改目标连接库

target_link_libraries( # Specifies the target library.
                       native-lib

                       avcodec
                       avdevice
                       avfilter
                       avformat
                       avutil
                       postproc
                       swresample
                       swscale

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )
4.5完整CMakeList.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.
             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 )

# 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.

set(ProjectRoot E:/Android/hello)

add_library( avcodec
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       avcodec

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libavcodec-56.so )

add_library( avdevice
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       avdevice

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libavdevice-56.so )

add_library( avfilter
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       avfilter

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libavfilter-5.so )

add_library( avformat
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       avformat

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libavformat-56.so )

add_library( avutil
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       avutil

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libavutil-54.so )

add_library( postproc
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       postproc

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libpostproc-53.so )

add_library( swresample
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       swresample

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libswresample-1.so )

add_library( swscale
             SHARED
             IMPORTED )
set_target_properties( # Specifies the target library.
                       swscale

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${ProjectRoot}/app/libs/jni/armeabi/libswscale-3.so )

include_directories( src/main/include/ )

target_link_libraries( # Specifies the target library.
                       native-lib

                       avcodec
                       avdevice
                       avfilter
                       avformat
                       avutil
                       postproc
                       swresample
                       swscale

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

5.1 defaultConfig {}中添加

ndk {
    moduleName "avcodec"
    abiFilters  'armeabi'
}
5.2 android {}中添加

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

参考文章

http://blog.youkuaiyun.com/mxw3755/article/details/56676923