Opencv 4.1.1 and Android Studio

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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/2...

Have you an idea for resolve my problem ??? Thanks Thomas