opencv4androidsdk2aar

opencv ver.4.5.3

demo testing in app

boolean success = OpenCVLoader.initDebug();
if (!success) {
    Log.e("TAG", "初始化失败");
    tv.setText("opencv 初始化失败 !!!");
    tv.setTextColor(Color.RED);
}else {
    tv.setText("opencv 初始化成功 !!! ver."+OpenCVLoader.OPENCV_VERSION);
    Log.e("TAG", "opencv 初始化成功 !! ver."+OpenCVLoader.OPENCV_VERSION);
    tv.setTextColor(Color.BLUE);
}

guide line (build opencv other version you can changes as below)

opencv sdk download: https://opencv.org/releases/

copy [opencv-sdk-dir]/sdk/java/src/org/opencv/engine/OpenCVEngineInterface.aidl to [opencv-module]/src/main/aidl/org/opencv/engine/OpenCVEngineInterface.aidl

copy [opencv-sdk-dir]/sdk/java/src/ to [opencv-module]/src/main/java

copy [opencv-sdk-dir]/sdk/native/libs/ to [opencv-module]/src/main/jniLibs

copy [opencv-sdk-dir]/sdk/java/res/values/attrs.xml to [opencv-module]/src/main/res/values/attrs.xml

change app build.gradle line

externalNativeBuild {
    cmake {
        cppFlags ""
        arguments "-DANDROID_STL=c++_shared" //fix dlopen failed: library "libc++_shared.so" not found
    }
}

build: ./gradlew assembleRelease

outputs: opencv/build/outputs/aar/opencv-release.aar