I try to add items to listview but it gives me an error, can anyone help me with this?

MIT App Inventor Help
1

I added an item to the listview and got an error

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blocks (2)1498×1548 328 KB

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f2121ed5448f9dd1c49e720×1600 127 KB

2

does that error appear when you click the "nhap_du_lieu" button?

3

CORRECT, WHEN I DO CLICK THE PEN "nhap_du_lieu" WILL REPORT THIS ERROR

4

Add an Item to the Block List, then re-populate the ListView with the Block List.

5

run TinyDB.ClearAll first, then try again. it looks like your username tag is not storing a list.

6

looks like something weird, I think you should share the project

7

What happens when you "Do it" the TinyDB.GetValue blocks here?

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To "Do it", connect to the companion, right click the blocks and select "Do It". A comment would appear showing the result. Please expand them post them here. "Do it" the purple blocks, not the orange blocks.

EDIT: I didn't see this. Post your AIA here because the other blocks are irrelevant.