My application looks like this on Samsung Note 8 device. (With 1080p portrait screen setting)
And it looks like on Samsung Note 8 with 4k portrait screen setting.
But my app is working as a successfully (about full screen) with my Samsung Note 5 device or other old devices.
What is the problem, I will be very happy if someone helps.
The problem is solved, thank you twg and LuisCGForte