HI im a beginner in app inventor, and im trying to display the firebase data in a list view. (The idea is that people can write what food are they donating, their contact, the expiration date, etc...) and then others can see who post, what are they donating and all that..
Your question is ?
You are not clustering the attributes of donations together in a way that lets you retrieve them unbroken.
Store the donations as dictionaries..
Add the dictionaries to daily lists of donations, one list per date. That makes cleanup easier.
Use YAML for the Element format.
Search this board for YAML formatting code.