Why the Get Value For Key does not work properly?

MIT App Inventor Help
#1

Hi all, I am making an where I use Cloud DB, Dictionary, and ColinTreeListView.
Now my problem is when I tried to use the when ColinTreeListView1.ExtraButtonClick I used this block-

image
image781×355 31.7 KB

In the image you can notice that the ColinTreeListViewElement1 is returning "Item 1 5kg". And you can also notice that the global ItemDictionary also contains key "Item 1 5kg".
But the problem is, when I tried to get the value for key "Item 1 5kg" (ColinTreeListViewElement) from global ItemDictionary, it is returning {} instead of the original value.

Is that any problem with my code?
Thank you :slightly_smiling_face:

#2

It works:

test
test958×438 47.5 KB

Having no access to your project, I can assume your dictionary has a dictionary structure but is not a dictionary.
Show block in which you download data to the dictionary.

#3

Your key I believe is Item 1 5kg and not "Item 1 5kg", try to use replace block before call ColinTreeListViewElement.Text and see if it works

image

#4

This is the whole block-

blocks (29)
blocks (29)1676×2306 582 KB

#5

I still can't see where your data gets into the "ItemDictionary" variable.
You can do this test:

test

On the other hand, the fastest way to find the error is to put the aia file here.

#6

Thank you @dora_paz and @Patryk_F for your help, I have solved the problem by debugging each and every blocks.

1 Like
#7

Glad you solved it. In case someone else faces the same problem, what caused the error ?

#8

Hi, it worked on companion but didn't work on the apk.
@ewpatton Can you please help?

#9

How can help you without seeing your project. Nobody has a glass ball here. Put an aia here so we can see what you are doing wrong.

2 Likes
The application does not start
#10

In this project
ATL_KV_EKM_Group_4_Prototype_Version3.aia (1.8 MB)
See the ItemCustomizer screen where you can see this block

blocks (29)
blocks (29)1676×2306 582 KB

#11

Hello when I tried on different the result was different-
Working

  • Vivo Y21L (Version 5.1.1)

Not Working

  • Samsung Tab A (Version 10)
  • Xiomi Redmi (Version 8.1.0)

There is another surprising thing-
The screen initializes and the CloudDB returns the last saved items, when the extra button is clicked, it returns the details dictionary. But when a newly added item is clicked on the extra button, it does not return the details dictionary.

AIA on the above post. Thank you

#12

Hi. Your application is very extensive. In order not to waste time learning about your application logic and figuring out what you meant, I built a simple Cloud database app. On my Samsung S8 with Android 9 it works with both companion and after compiled. Compile this application and test it on your devices.

The app saves items as a dictionary in CloudDB. Each item has a name, quantity and price. You can add items and remove.

cloud_dictionary.aia (4.3 KB)

blocks - 2021-03-22T164357.066
blocks - 2021-03-22T164357.066749×1568 114 KB

Edit

I compiled your application and registered. I added two items to the store and after logging in again I can read the previously saved items without any problems.

I modified some of your blocks. There are no such errors.

ATL_KV_EKM_Group_4_Prototype_Version3_copy.aia (1.8 MB)

#13

Thank you for your support, I will try it in my app.