Why i can not setup android platfrom?

I know it
But can i use with other way ?
I must use only with TADP? Why i can not setup with other way ? I put a image of my android sdk in first post maybe that have problem ?!?
I dont like unity 3d or other engine but unreal is very comfortible for me . when i have 13 years old i started to build game with unreal and now i have 16 years old so change. Game engine is very hard for me
Please help !!! Please