I was trying to add opencv 4.5.2 into my android studio project. But I am getting errors when I try to run the application. There was no error before that.

Steps that I followed to add opencv:

1. File -> New -> Import Module and then I selected the sdk folder that was inside the extracted folder of opencv-4.5.2-android-sdk (that I downloaded from opencv.org/releases/) and I gave it name openCVLibrary452 and then I clicked on finish.

2. File -> Project Structure -> Add Dependency and then I selected openCVLibrary452 from the list and clicked Apply and Ok.

Now I added below line inside my MainActivity onCreate()

Log.e("TAG", "OpenCV initialized : "  OpenCVLoader.initDebug());

When I try to run the app this is the error I get:

[CXX1405] error when building with cmake using F:\StudioProjects\KingScanner\openCVLibrary452\libcxx_helper\CMakeLists.txt: Build command failed.
Error while executing process E:\Android_sdk\cmake\3.18.1\bin\cmake.exe with arguments {-HF:\StudioProjects\KingScanner\openCVLibrary452\libcxx_helper -DCMAKE_SYSTEM_NAME=Android -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_SYSTEM_VERSION=21 -DANDROID_PLATFORM=android-21 -DANDROID_ABI=arm64-v8a -DCMAKE_ANDROID_ARCH_ABI=arm64-v8a -DANDROID_NDK=E:\Android_sdk\ndk\21.4.7075529 -DCMAKE_ANDROID_NDK=E:\Android_sdk\ndk\21.4.7075529 -DCMAKE_TOOLCHAIN_FILE=E:\Android_sdk\ndk\21.4.7075529\build\cmake\android.toolchain.cmake -DCMAKE_MAKE_PROGRAM=E:\Android_sdk\cmake\3.18.1\bin\ninja.exe -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=F:\StudioProjects\KingScanner\openCVLibrary452\build\intermediates\cxx\Debug\6n761z2d\obj\arm64-v8a -DCMAKE_RUNTIME_OUTPUT_DIRECTORY=F:\StudioProjects\KingScanner\openCVLibrary452\build\intermediates\cxx\Debug\6n761z2d\obj\arm64-v8a -DCMAKE_BUILD_TYPE=Debug -BF:\StudioProjects\KingScanner\openCVLibrary452\.cxx\Debug\6n761z2d\arm64-v8a -GNinja -DANDROID_STL=c  _shared}

This is my first time adding opencv to my project. Can you please tell me what am I missing here.

Any help would be much appreciated. Thank you.

CodePudding user response：

It doesn't fix the issue with your compiler, but if you just want to use OpenCV you can put this dependency in your build.gradle:

implementation 'ai.eye2you:opencv-android:4.5.2'

And then just initialize it with your code or with System.loadLibrary("opencv_java4").