How do I append data in the listview with the help of blocks?

MIT App Inventor Help
1

I want to append data in the list view where user data will be stored and showed in the listview.

2

To change the ListView you need to update the List that populates the ListView.
Here is Sajal's List tutorial List Blocks On App Inventor | Imagnity

To store the data you need to save the List to a TinyDB if the data is only to be stored on the Android or you can use FirebaseDB, CloudDB, a spreadsheet used like a database or to save the data.

  1. Create a List
  2. Add Items to a List
  3. Display List Items
  4. Remove List Items
  5. Replace an Item
  6. Search for an Item
  7. Sort a List
  8. Shuffle a List