Android: why setVisibility(View.GONE); or setVisibility(View.INVISIBLE); do not work

Question

I want my DatePicker and the button to be invisible in the begining. And when I press my magic button I want to setVisibility(View.Visible);

The problem

Answer 1

First see your code:

dp2.setVisibility(View.GONE);
dp2.setVisibility(View.INVISIBLE);
btn2.setVisibility(View.GONE);
btn2.setVisibility(View.INVISIBLE);

Here you set both visibility to same field so that's the problem. I give one sample for that sample demo