Using listpicker as navbar,how to open and close screen between screens without memory problems

[anna770822]

Need some help here.

I am using listpicker as a navbar like below in red

I have three screens :Screen1,Screen2,Screen3

My ElementsFromString is also Screen1,Screen2,Screen3

In Screen1 Blocks, I have code like below

For Screen 2 and Screen 3 blocks how do i code to prevent from memory problems?

I am not able to use “close screen” and “open another screen” in sequence so i am not sure what to do…

Thank you in advance for answering this.

[TIMAI2]

Use different screens wisely

• Before starting to create another screen, first you should think about is it really necessary? 
• See also Building apps with many screens and SteveJG's post about advantages/disadvantages, because in only one screen you also can use vertical arrangements to simulate different screens, just set the arrangements to visible = true/false as needed... 
• See also Martyn_HK's example about how to use Tabs in App Inventor and another example from Cyd. and my Tabbed Screens Demo

If you decided to use different screens, then you should switch them correctly, else you will run out of memory after a while...      
The recommended method of switching screens in App Inventor

(Thanks Taifun)

 

Also see demo: multiscreen.aia

 

[anna770822]

@TIMAI2 , thank you very much. I have read all. To prevent the further issue, I think it’s better for me to redesign my app using buttons to control the visibility of the layout.

Thanks again