OpenCV_Android_SDK

Setup Enviroment:

This setup to build OpenCV Android SDK for Android 9 (28) and Android 10 (30) and build on Ubuntu 18. SDK cmdline-tools path: /mnt/d/Android-SDK/cmdline-tools/bin SDK path: /mnt/d/Android-SDK/Linux NDK path: /mnt/d/Android-SDK/Linux/ndk/21.4.7075529

1. Install JDK: sudo apt install default-jdk
2. Install Python3 and set python as default: update-alternatives --install /usr/bin/python python /usr/bin/python3 1
3. Install sdk cmdline-tools and add sdk cmdline-tools path to .bashrc
4. Download SDK, NDK, CMake: sdkmanager "platform-tools" "platforms;android-28" "platforms;android-30" "ndk;21.4.7075529" "cmake;3.10.2.4988404" "build-tools;28.0.3" "build-tools;30.0.3" --sdk_root=/mnt/d/Android-SDK/Linux
5. Install config ccache:

sudo apt-get install -y ccache

export USE_CCACHE=1

ccache -M 50G

Download OpenCV sourcecode:

./build.sh download

Build OpenCV Android SDK:

Edit config.sh file: set host_os, cpu core number, sdk & ndk path, gradle version, extra module

Then run ./build.sh or ./build.sh [version]