Splitting an html text (?)

MIT App Inventor Help
#1

Hi all, sorry for my english but i am using a translator.

I'm trying to figure out how to build an app to read data from a web page (then in the future I hope to be able to process it).

If I can, I can attach the block diagram that I copied/modified from a tutorial that was used for other things.

I have a web page that when called returns a response like: [699,0,-942,0,0]
what I would like to do is be able to separate the numbers...
With the Split-text function and setting the "," I managed to separate something but I can't separate all the numbers...

Am I doing everything wrong?
Is there another tool for what I want to do?
What I would need is both to display the numbers in windows, but also to simply process them, like if the last number is 0 do this otherwise that...

Can you give me a tip, just direct me so that I understand what I have to use to understand.

Thank you very much
bye Bye
Mauro

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#2

first remove the brackets, then use the split at block to split at , (comma) to get a list of your numbers, then just use the select list item block to select the 1st, 2nd etc. number

Taifun

#3

Thanks for the reply.

I'd like to write to you that I understand.... but....
I don't understand which tools I have to take, what are they called exactly?

ps : treat me like a child, write me step by step what to do .... I have the good will to learn but unfortunately I'm not very familiar with these objects ....

thanks a lot anyway

#4

start with the basics...

A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook App Inventor 2 Book: Create Your Own Android Apps ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps
How to do a lot of basic things with App Inventor are described here: How do you...? .

Also do the tutorials Tutorials for MIT App Inventor to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor

Taifun

Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by icon24 Taifun.

#5

and learn to debug your blocks

use Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools
Taifun

Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by icon24 Taifun.

#6

thanks, i will try.
bye Bye

#7

Read the links Taifun gave you to learn more about App Inventor. Below is an example of what you want.

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#8

Thank you very much, you have been of great help to me... now I'm understanding the mechanism...

I know I have to study the book, my problem is time... I have very few free hours and that's why I've always learned by trying and trying again...

thanks again everyone

1 Like
#9

Another way of doing it could be

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1 Like
#10

Another one, spot the differences :wink:

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#11

... or... :wink:

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1 Like
#12

Use the Web component's JsonTextDecode block to convert your string to a list, then select list items as required....

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3 Likes
#13

I don't think it's necessary or helpful to use an additional component for such a simple matter that also declares (possibly unnecessary) permissions in the Manifest.

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#14

that's why this block better to be a part of Dictionary or List or Text, rather than in Web component.

2 Likes
#15

If aimed at my solution, the OP is already using a web component to get their web response, so logic follows to use the same component to decode the response. Most people would see that the string is a json array.

2 Likes
#16

Ok, I didn't notice that.

#17

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#18

wow! what a great team you are!! congratulations and thanks again!!!

After Peter's help I was able to divide the numbers as I hoped, and I was also able to assign each value to a variable.

Now I'm trying to figure out how to make the "label" change color if the value exceeds a certain threshold... but I haven't succeeded yet.... But for now I'm not asking for help :wink: I still want to try and try again :slight_smile: .

Do you know if there is a manual that explains a bit of everything about App Inventor, I mean a downloadable pdf from the internet?

Thanks again for the valuable advice!

ps : I will also try the other solutions after Peter's to see what result they lead to!

byebye from Italy and happy Sunday everyone!

Forgive me always my English as a translator :wink:

#19

Sorry, I had already suggested Taifun where to find information "App Inventor 2 Book: Create Your Own Android Apps"

#20