Help filtering a list

MIT App Inventor Help
1

I am working on an app that is supposed to take a list of sizes and assign the sizes to small, medium, and large. I am having trouble filtering out the sizes in my if statements. If anyone knows what's wrong with my code, I would love the help. Here is a sample of my code:

Screenshot_2021-04-06-16-46-32-673
Screenshot_2021-04-06-16-46-32-673800×1280 151 KB
Screenshot_2021-04-06-16-42-41-648
Screenshot_2021-04-06-16-42-41-648800×1280 138 KB
Screenshot (1)
Screenshot (1)1139×577 54.4 KB

2

It's impossible to debug this without seeing how sizelist gets loaded.

Export your .aia file and upload it here.

export_and_upload_aia
export_and_upload_aia1255×551 2.89 MB

P.S. Can you rename Checkbox2 in the Designer to something more informative, like ckbFemale?

3

Thanks for the tip! Phone_App (1).aia (627.0 KB)

4

blocks (1)
blocks (1)994×364 42.6 KB
blocks
blocks2640×590 112 KB

This looks like a case of write-only code, where the coder thinks he is done with the code after writing it, and does not go back to read it afterwards.

  • Spinner1.Width is the width in pixels of the component, which is inappropriate for clothing sizes. You want Spinner1.Selection, same for all the other spinners.
  • You did not need a list for this. Better to go into the Designer and rename those components, so you can use their names in the blocks:
if ckbMale.Checked then
  if (spnWaist.Selection <= 28) then
     set lblSize.Text to 'Small'
  else if (spnWaist.Selection <= 36) then
     set lblSize.Text to 'Medium'
  else
      set lblSize.Text to 'Large'
end if

(Corrected - ABG)

I reorganize your if/then tree also, so that the Large assignment is included for Male customers only.

This is much more readable than list item counting, right?

P.P.S. When the the size comparisons are in numerical order, you can use that to simplify the range tests in an if/the/elseif tree.

5

Thank you! I really appreciate your help :slight_smile: