java - Android display buttons when clicked on main button

Question

I have an activity where I have a few main buttons which should be displayed all the time, and I have for every main button a few sub-buttons. The sub-buttons shall be displayed when I click on one main-button.

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They are like titles: There are main titles and every main title has got a few sub titles. But the sub-titles should only be displayed when I click on the button with the main title. So when I dont click, only the main buttons shall be seen, not the subbuttons. How do I realize that? Or is there a godd tutorial for that?

Answer 1

Inside of an View.OnClickListener(), use the following code to make a button invisible: b.setVisibility(View.GONE);

And to show it: b.setVisibility(View.VISIBLE);