Sticky header items [Image Views, Text views with clicks] with expand/collapse feature

[ccsavvy]

Hi, I have checked all issues both open/close regarding implementing the sticky header with expand and collapse feature. However, I couldn't find the correct implementation out of it. I have this use case whereby I have this parent and child view relationship adapters to be added in the recycler view, only 1 should expand the rest auto collapse. Moreover, this parent header should stick on top while its in expanded state and scrolling through child items and when another parent header item comes it will scroll altogether with the sticky header above.

I would very much appreciate if you could help me set my path into right direction.