A modern programming language that makes developers happier.

kotlinlang

Can anyone tell me how to use `BackHandler`? I want to use it to collapse `ModalBottomSheet`, but I didn't find a good way to use it

It should be something like 
```BackHandler(
enabled = state==halfExpanded || state==Expanded,
onBack={ state = Collapsed
}
)
```
I think you will get the idea

thank you, But unfortunately, it still doesn't work

image.png

I think your BackHandler located in a wrong place

Is the backhandler working in other places
? Maybe the Local provider for the Back handler is missing?

oh.....sorry.. its true, i forget delete `onBackPressed()` in MainActivity...，when i deleted `onBackPressed` , it can work normal