artilla's blog

http://blog.codeonion.com/2015/11/25/creating-a-new-opencv-project-in-android-studio/

OS X El Capitan 버전 10.11.3 Xcode 버전 7.2.1 OpenCV 3.1.0 환경에서 잘 동작함. http://cinema4dr12.tistory.com/entry/OpenCV-Setting-OpenCV-Development-Environment-in-Xcode

It is odd that when loading OpenCV NDK module in static statement makes app slow. Don't load the module like this.  static {       System. loadLibrary ( "ndk_module" );  } Load NDK module at onManagerConnected() in BaseLoaderCallback. private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback( this ) { @Override public void onManagerConnected( int status) { switch (status) { case LoaderCallbackInterface. SUCCESS : { System. loadLibrary ( "ndk_module" ); mOpenCvCameraView .enableView(); } break ; default : { super .onManagerConnected(status); } break ; } } };

It is really frustrating to build OpenCV native code with new Android Studio. The new Android Studio doesn't use make files, instead, sets compile options in app's builde.gradle file. The new gradle experimental(0.6.0-beta4) has some changes in DSL. It uses '.add' function, not '+='. Look at Sample Project at github AndroidOpenCVNDKDemo . It use Android Studio 2.0 beta5, gradle-experimental:0.6.0-beta, and OpenCV 3.1.0. I hope this will save your time. Useful sites http://tools.android.com/tech-docs/new-build-system/gradle-experimental http://ph0b.com/new-android-studio-ndk-support/ https://github.com/joaopedronardari/OpenCV-AndroidSamples -- 2016.03.06 Updated step by step explanation for Android NDK http://web.guohuiwang.com/technical-notes/androidndk1

check  OPENCV_INSTALL_MODULES:=on in your Android.mk. http://stackoverflow.com/questions/25045046/android-opencv-error-cannot-find-lopencv-java