Transfer variable Textbox Values between Screens

[Eng_A.Abdelaty]

I have

In Screen3 : textbox3

In Screen2 : Button2a & textbox2a with variable values
Button2b & textbox2b with variable values
Button2c & textbox2c with variable values

I want

**When I open Screen 3 from anywhere other than Screen2 textbox1.text= empty

**When I an in screen 2 only and click Button2a

open another screen = Screen 3 and Set Textbox3.text = Textbox2a.text**

**and when I click Button2b

open another screen = Screen 3 and Set Textbox3.text = Textbox2b.text**

**and when I click Button2c

open another screen = Screen 3 and Set Textbox3.text = Textbox2c.text**

I know how to to all that by tinnydb or by open screen with start value

but i dont know how to do the first action

" When I initialize Screen 3 from anywhere other than Screen2 set textbox1.text= empty else get value from Screen2 "

[Taifun]

Use TinyDB to transfer data between screens
Alternatively use virtual screens, see also tip 1 here General Tips and Tricks for App Inventor

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 Our Tutorials! to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor

Taifun

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

[Taifun]

@Eng_A.Abdelaty

but i dont know how to do the first action

" When I initialize Screen 3 from anywhere other than Screen2 set textbox1.text= empty "

Before switching screens, store the current screen name in TinyDB

Then in Screen3 Initialize check TinyDB to get the last current screen

Taifun

[Eng_A.Abdelaty]

[Taifun]

remember to switch screens correctly

there are 2 methods

1. Manager screen method
   App Inventor Tutorials and Examples: Manager Screen | Pura Vida Apps
2. Tribblehunter method
   App Inventor Tutorials and Examples: Multiple Screens | Pura Vida Apps

Taifun