Unable to include android ndk in cmake visual studio - c++

Question

I was trying to make a cross platform imgui project in visual studio 2022, starting with android. In the beginning, I was not able to include some android libraries properly, so after following several tutorials, I ended up with this CMakeLists.txt:
# CMakeList.txt : CMake project for CMakeProject3 (imgui Cross-platform), include source and define
# project specific logic here.
#
cmake_minimum_required (VERSION 3.8)
project ("CMakeProject3 (imgui Cross-platform)")
list(APPEND CMAKE_PREFIX_PATH "C:/Users/HP/source/repos/CMakeProject3 (imgui Cross-platform)/build/vcpkg_installed/x64-windows/share/")
find_package(imgui REQUIRED)
# Add source to this project's executable.
add_executable (CMakeTarget "CMakeProject3 (imgui Cross-platform).cpp" "CMakeProject3 (imgui Cross-platform).h" "imgui_android.cpp" "imgui_impl_android.cpp" "imgui_impl_android.h")
target_include_directories(CMakeTarget PRIVATE "C:/Microsoft/AndroidNDK/android-ndk-r23c/toolchains/llvm/prebuilt/windows-x86_64/sysroot/usr/include/android/"
"C:/Microsoft/AndroidNDK/android-ndk-r23c/sources/android/native_app_glue/")
target_link_libraries(CMakeTarget
PRIVATE
imgui::imgui
)
if (CMAKE_VERSION VERSION_GREATER 3.12)
set_property(TARGET CMakeTarget PROPERTY CXX_STANDARD 20)
endif()
# TODO: Add tests and install targets if needed.
It works partially but according to example of android imgui example, it needs
#include <android/log.h>
#include <android_native_app_glue.h>
#include <android/asset_manager.h>
I changed to:
#include "log.h"
#include "android_native_app_glue.h"
#include "asset_manager.h"
It started to give several errors for cannot open source file. The errors were for poll.h, pthread.h, sched.h, android/configuration.h, etc. It seems to me that I need to inlcude android ndk completely but
include(AndroidNdkGdb)
include(AndroidNdkModules)
gives error in cmake even when I installed android ndk and sdk.
I want to be able to use android libraries in my cross-platform project in visual studio 2022.

Answer 1

I fixed the error by updating CMakeLists.txt to:
# CMakeList.txt : CMake project for CMakeProject3 (imgui Cross-platform), include source and define
# project specific logic here.
#
cmake_minimum_required (VERSION 3.8)
project ("CMakeProject3 (imgui Cross-platform)")
list(APPEND CMAKE_PREFIX_PATH "C:/Users/HP/source/repos/CMakeProject3 (imgui Cross-platform)/build/vcpkg_installed/x64-windows/share/")
find_package(imgui REQUIRED)
set(CMAKE_SYSROOT C:/Microsoft/AndroidNDK/android-ndk-r23c/toolchains/llvm/prebuilt/windows-x86_64/sysroot)
# Add source to this project's executable.
add_executable (CMakeTarget "CMakeProject3 (imgui Cross-platform).cpp" "CMakeProject3 (imgui Cross-platform).h" "imgui_android.cpp" "imgui_impl_android.cpp" "imgui_impl_android.h")
target_include_directories(CMakeTarget PRIVATE "C:/Microsoft/AndroidNDK/android-ndk-r23c/toolchains/llvm/prebuilt/windows-x86_64/sysroot/usr/include/"
"C:/Microsoft/AndroidNDK/android-ndk-r23c/sources/android/native_app_glue/"
"C:/Microsoft/AndroidNDK/android-ndk-r23c/toolchains/llvm/prebuilt/windows-x86_64/sysroot/usr/include/asm/")
target_link_libraries(CMakeTarget
PRIVATE
imgui::imgui
)
if (CMAKE_VERSION VERSION_GREATER 3.12)
set_property(TARGET CMakeTarget PROPERTY CXX_STANDARD 20)
endif()
# TODO: Add tests and install targets if needed.