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Android 编译和使用libheif

article 2024/12/4 3:58:27

项目中需要使用libheif,libde265,libyuv。一下是相应的cmakelist.txt。这里直接使用了静态库。里面涉及到c++包的链接，需要stdc++。

${PROJECT_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/liblibde265.a这个路径由于操作过程中copy出现问题，多了一层路径，消耗了很多时间。哎，永远不知道会出现什么莫名的问题。

# 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 3.22.1)

# Declares and names the project.

project("myLL")

# 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.
include_directories(${PROJECT_SOURCE_DIR}/../include)

add_library(libheif
        STATIC
        IMPORTED)

set_target_properties( # Specifies the target library.
        libheif
        # Specifies the parameter you want to define.
        PROPERTIES IMPORTED_LOCATION
        # Provides the path to the library you want to import.
        ${PROJECT_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libheif.a)

message("PROJECT_SOURCE_DIR: ${PROJECT_SOURCE_DIR}")
message("ANDROID_ABI: ${ANDROID_ABI}")


add_library(libde265
        STATIC
        IMPORTED)

set_target_properties( # Specifies the target library.
        libde265
        # Specifies the parameter you want to define.
        PROPERTIES IMPORTED_LOCATION
        # Provides the path to the library you want to import.
        ${PROJECT_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/liblibde265.a)

add_library(libyuv
        STATIC
        IMPORTED)

set_target_properties( # Specifies the target library.
        libyuv
        # Specifies the parameter you want to define.
        PROPERTIES IMPORTED_LOCATION
        # Provides the path to the library you want to import.
        ${PROJECT_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libyuv.a)

#[[
add_library( # Sets the name of the library.
        heif_jni
        # Sets the library as a shared library.
        SHARED
        # Provides a relative path to your source file(s).
        heif_jni.cpp)
]]


set( source_dir ${CMAKE_CURRENT_SOURCE_DIR} )
set( headers
        ${source_dir}/nativelib.h
        ${PROJECT_SOURCE_DIR}/../include/libheif/heif.h
        ${PROJECT_SOURCE_DIR}/../include/libheif/heif_cxx.h
        ${PROJECT_SOURCE_DIR}/../include/libheif/heif_items.h
        ${PROJECT_SOURCE_DIR}/../include/libheif/heif_plugin.h
        ${PROJECT_SOURCE_DIR}/../include/libheif/heif_properties.h
        ${PROJECT_SOURCE_DIR}/../include/libheif/heif_version.h
)

set( sources
        ${source_dir}/nativelib.c
        ${source_dir}/nativelib_jni.c
)

add_library( # Sets the name of the library.
        myLL

        # Sets the library as a shared library.
        SHARED

        # Provides a relative path to your source file(s).
        ${sources} ${headers} )

# 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.
                       myLL
                       libheif
                       libde265
                       libyuv
                       jnigraphics
                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib}
        			    stdc++
                     #[[  heif_jni]]
                       )
                     

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