Best practice to display nested lists on android
<p>I would like to display a tree without using the tree component, since I don't know how many levels there will be.<br>
I though about a list, that opens another list on item click, and so on...  </p>

<ul>
<li>Is it correct to open a new activity for each level?</li>
<li>Will it not overcharge the system?</li>
<li>Or is it preferable to have only one list that I clear and refill with children?  </li>
<li>How the standard back button will behave on both case?  </li>
</ul>
