New app help

Hi, not sure if this is the right place

I’m am new to kotlin and looking at building an app, I am currently trying to achieve the following

Textbox 1 a user looks up a particularl tool from a list of 300 after selecting the tool lets says its a mega gas analyser, once selected it populates the text box with the name and assigns a value in a text box next to it. The user then selects the number of units sold and it combines them to give a total.

Any help appreciated


The question is not kotlin-specific and not specific at all. Please ask specific questions.

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Google recently released a free app development course:

There’s several other courses and tutorials available. Udemy, youtube, etc. I’m not familiar with them enough to recommend any specific one.