How do you select and delete a item of a List Picker?

[Thalison_Araujo]

I'm using List Picker with items stored in TinyDB. How can i create a button to delete some selected item?

[Laffy]

Could you provide more information about your motivation for wanting to pursue this and what your ultimate goal is?

[TIMAI2]

The easiest method is to offer the user a choice when an item in the listpicker is selected. You can use the notifier choose dialog for this. If they choose to delete, then remove the item from the underyling list, and reload the listpicker. It is often best to offer the user a confirmatory dialog before they delete the item (use another notifier choose dialog again for this).

[Thalison_Araujo]

Can u make a image with a example on App inventor's blocks?

[TIMAI2]

[Laffy]

There are two ways to make what you are saying.

In here, we have a textbox to write down your item, and then we'd have a save button to place it on the listveiwer. Now... onto your question about deleting, when we test it... the user would just have to click on his/her item that he/she has saved in the listveiwer.

2. Sorry, I just saw @TIMAI2 with the other solution

[Thalison_Araujo]

Sorry about the mess, but i really can't make it work. Can u help me?

[TIMAI2]

If you want to use a button, you could do something like this:

will offer to delete the current listpicker selection

[ABG]

Deleting from a list picker is like washing the mirror instead of washing my face.

P.S. Here is a complete sample ...

Show checkboxes in my text box

For a To Do List, consider keeping two lists: To Do Done The has two advantages: The To Do list gets shorter as you complete tasks The Done list can be used to repopulate the ToDo list for repeating tasks, like Is this my year to vacuum? Here is my personal To Do List app: [Capture0] [Capture1] [Capture2] [Capture3] [Capture4] (It adds new tasks to the top of the To Do List. Both the ToDo List and Done List are List Pickers. I build up the To Do List .Text to show it all at a gla…

[Thalison_Araujo]

I followed your blocks but still showing this error:

[TIMAI2]

You do not appear to have followed my blocks, this is probably why you get an error.

[ChrisWard]

I have a code snippet on my website which also explains the 'danger' of deleting an item from a ListView:

https://www.professorcad.co.uk/appinventorsnippets#DelListViewItems

[Thalison_Araujo]

Guys i found a project on gallery that helped me. Thanks to everyone!