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Native code

Android NDK is used with CMake to compile C/C++.

OpenCV setup

  1. Download the latest OpenCV Android library at https://opencv.org/releases.
  2. Extract the content of the zip file into a folder (in /opt folder on Linux for ex).
  3. Import OpenCV as a module into your Android project by clicking on File -> New -> Import Module….
  4. Choose <opencv_android_folder>/sdk/java and wait for the sync to complete.
  5. Create a folder named jniLibs in src/main and copy the content of <opencv_android_folder>/sdk/native/libs into it. It will copy a libopencv_java4.so file for each device architecture (arm64, x86, ...).
  6. Look at src/main/build.gradle to add the OpenCV module as a dependency and configure cmake.
  7. Look at src/main/cpp/CMakeLists.txt to add the OpenCV library to your native code. Edit the var pathToOpenCV to your OpenCV path.