Android Question Background colour / Theme

[embedded]

I have making an app which based on minsdkversion=5 and targetsdkversion19. It background is black and I am staisfied with it.
When I publish it to play store...it refuse to publish..says targetsdk=26 required.
So I upgrade both b4a to 8.0 and set targetsdk to 26.
Everything is fine.apk is generated...but background change to white...as in picture...how it is done to black.

 

[DonManfred]

Please REMOVE THIS BIIIIIIIG Pictures. It just make the post much more difficult to read.
Change the Theme you are using to be an Material theme.

 

[embedded]

Please REMOVE THIS BIIIIIIIG Pictures. It just make the post much more difficult to read.
Change the Theme you are using to be an Material theme.

Image...Removed.....Thanks for reply....I have change theme in designer...it looks good...but when build in relese mode....white background appear again...i try to change in manifest editor...but not able to get the desired result.

 

[embedded]

Done...Silly Mistake by me.....just Change the Activity Background to black and get desired Result....