Can I prevent the ExpansionTile from rebuilding its children?

Question

I have an ExpansionTile widget and it contains some children, what I want is to prevent the ExpansionTile from rebuilding its children when I expand it.

Is there any basic method or will I have to do some trick?

user_10498374 · Answer

just make this maintainState value true like this:

ExpansionTile(
    maintainState: true,
    children: [
    ...
    ]
)

user_11989529 · Answer

Sure try to use automaticKeepAlive it will keep your widget alive without building again

If you want to keep it without building as a constant , you can use const type

For automaticKeepAlive check : https://api.flutter.dev/flutter/widgets/AutomaticKeepAliveClientMixin-mixin.html

Here more like this q & a

https://stackoverflow.com/a/52543119/11989529

Can I prevent the ExpansionTile from rebuilding its children?

2 Answers