Android平台OpenGL ES/Assimp/OpenCV/GLM集成说明

本文代码见: https://github.com/jiangxincode/DroidDemo

集成Assimp

• 下载Assimp 5.0.1版本：https://codeload.github.com/assimp/assimp/zip/refs/tags/v5.0.1
• 解压后本地目录为D:\Code\temp\assimp-5.0.1
• 将scripts\android_crosscompile\make_android.bat拷贝为scripts\android_crosscompile\make_android_self_defined.bat
• 将scripts\android_crosscompile\make_android_self_defined.bat中的内容进行自定义配置，我的配置如下：

@echo off

set ASSIMP_PATH=D:\Code\temp\assimp-5.0.1
set CMAKE_PATH="C:\Users\jiangxin\AppData\Local\Android\Sdk\cmake\3.6.4111459\bin\cmake.exe"
set ANDROID_NDK_PATH=C:\Users\jiangxin\AppData\Local\Android\Sdk\ndk\22.0.7026061
set ANDROID_CMAKE_PATH=C:\Users\jiangxin\AppData\Local\Android\Sdk\ndk\22.0.7026061\build\cmake

pushd %ASSIMP_PATH%

rmdir /s /q build
mkdir build
cd build

%CMAKE_PATH% .. ^
  -G"MinGW Makefiles" ^
  -DCMAKE_BUILD_TYPE=Release ^
  -DCMAKE_CXX_FLAGS_RELEASE="%CMAKE_CXX_FLAGS_RELEASE% -Os -Wall -s" ^
  -DCMAKE_TOOLCHAIN_FILE=%ANDROID_CMAKE_PATH%\android.toolchain.cmake ^
  -DCMAKE_MAKE_PROGRAM=%ANDROID_NDK_PATH%\prebuilt\windows-x86_64\bin\make.exe ^
  -DANDROID_NDK=%ANDROID_NDK_PATH% ^
  -DANDROID_NATIVE_API_LEVEL=android-16 ^
  -DASSIMP_ANDROID_JNIIOSYSTEM=ON ^
  -DANDROID_ABI=arm64-v8a ^
  -DASSIMP_BUILD_ZLIB=ON ^
  -DASSIMP_BUILD_TESTS=OFF ^
  -DASSIMP_BUILD_ASSIMP_TOOLS=OFF ^
  -DASSIMP_NO_EXPORT=ON

%CMAKE_PATH% --build .

popd

• 执行如下编译命令：

cd D:\Code\temp\assimp-5.0.1\scripts\android_crosscompile
.\make_android_self_defined.bat

• 将assimp-4.1.0\build\codelibassimp.so放到app\libs\
• 将assimp-4.1.0\include中的目录放到app\src\main\cpp\include
• 将assimp-4.1.0\build\include\assimp\config.h拷贝到app\src\main\cpp\assimp-4.1.0\include\assimp

集成OpenCV

OpenCV的集成比较简单，官网提供了Android平台所需的动态库和C++头文件。

• 下载OpenCV 4.5.1版本：https://cfhcable.dl.sourceforge.net/project/opencvlibrary/4.5.1/opencv-4.5.1-android-sdk.zip
• 解压后本地目录为D:\Code\temp\opencv-4.5.1-android-sdk
• 将OpenCV-android-sdk\sdk\native\libs\arm64-v8a\libopencv_java4.so拷贝到app\libs\
• 将OpenCV-android-sdk\sdk\native\jni\include中的内容拷贝到app\src\main\cpp\include

集成GLM

GLM的集成就更简单了，源码都是hpp文件（即定义和实现在同一个文件中）。

• 下载GLM 0.9.9.8版本：https://github.com/g-truc/glm/archive/refs/tags/0.9.9.8.zip
• 解压后本地目录为D:\Code\temp\glm-0.9.9.8
• 将glm-0.9.9.8\glm中的内容拷贝到app\src\main\cpp\include

参考

• Android: Use Assimp to load a 3D model: http://www.anandmuralidhar.com/blog/android/assimp/
• AssimpAndroid: https://github.com/anandmuralidhar24/AssimpAndroid
• 使用Android Studio+CMakeLists编译assimp: https://blog.csdn.net/u010302327/article/details/104473671
• TestAssimp: https://blog.csdn.net/u010302327/article/details/104473671
• Assimp编译实录: https://blog.csdn.net/fyfcauc/article/details/72627996