Back button and android keyboard

Question

I’m actually in two trouble:

• The Backpressed it removes the keyboard and Buga a command line, I don’t know why. He pretty much ignores the adappLista.notifyDataSetChanged() and does not modify my list of recyclerview.

• The other problem involves the keyboard that switches from numeric to alphanumeric and is still locked. You can’t use it.

if (lista.get(posicaoview).isLinhaselecionada()) {                                
lista.get(posicaoview).setLinhaselecionada(false);
adappLista.notifyDataSetChanged();}