As I understand it, Android does not have a Treeview element with the ability to display lines of nesting. To create nesting, you can use ExpandableListView and in the end we get this:

enter image description here

by customizing it can be beautifully decorated. But one thing is not clear why there is no possibility of drawing this nesting in the form of a tree (lines): enter image description here

Is it even possible to implement line drawing?

  • There are several implementations of the TreeView web, but without these "a la Windows Explorer" lines. I think that you can write - can we write together? - Barmaley
  • Yes, I did such a 1 in 1, only I had roundels , I will find it here - Shwarz Andrei
  • I don’t see any problems to do this, I already see at least two options. The first is to use pictures or xml, and the second is to use line drawing software. - Maxim Kuznetsov
  • @ Shwarz Andrei hope for you, just don’t throw the androidtreeview library, I saw it - upward
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    @ Maxim Kuznetsov in words and I did it - upward

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