Navigation menu items keep selected.

Question

I am making an Android app based on navigation bar activity but a problem occured that after selecting an item and again going back into navigation drawer, I find that the last item I have selected was already selected. I want to disable it.
App link --
bit.ly/app_msir1 (firebase storage)
bit.ly/app_msir2 (Google drive)
Pls. Help me.

Answer 1

//
Because you have selected it and you are on that page