Opencv 4.1.1 and Android Studio

Hello, i tried since three days to create a new project including opencv4.1.1 on Android Studio 3.4.2 I follow a lot of article but nothing append : when my app is starting, the opencv library won't initialize it ... For example, i used this article (see the respone of Plo_Koon for opencv 4.1) : https://stackoverflow.com/questions/27406303/opencv-in-android-studio Have you an idea for resolve my problem ??? Thanks Thomas