Meanwhile we have different possibilities in App Inventor to pick an item from a list: listpicker, listview and spinner. But we only can select one item! The solution presented here offers a multiple choice combobox.
The user can select multiple items. The selected item id(s) will be displayed in this example in a label in csv format.
Thank you DaveRandom!
The tools extension offers the method PathToAssets which always returns the correct path to the assets.
By the way: the Cancel button changes automatically according to the language of the device. So if you use e.g. German as language, you will get an "Abbrechen" button instead.
Q1: How do I change the initial lists? For example, I want to delete "five cats" and "one elephant" to other things like "spanish" and "french"?
A: Learn How to work with Lists (by Saj) and How to work with Lists and Lists of lists (pdf) (by appinventor.org)
Q2: After clicking "ok", the "selected ids" display numbers "1,2", but I want it to display the actual items like "five cats" and "one elephant", so how should I do that?
A: use select list item blocks and display the corresponding items from the list. Please do the tutorials to learn the basics, see also Top 5 Tips: How to learn App Inventor
You can test with the apk file, which is available for download here:
Download apk file
You can buy the source code of this project.
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Thank you! Taifun