No light, Dark screen

Can anyone help me?
When I cook my app (apk), i can run it smoothly without lag or anything, the problem is, I can’t see anything.
I used every type of lighting, i tried every method and i read many forums… still no luck :confused:

ps, i’m using a Samsung Galaxy S7 edge

does anyone have a solution for this? :c

We had this problem with 4.10.4, after upgrading to 4.11.2 it worked on our Galaxy S7.