Can anyone tell me how to use `BackHandler`? I want to use it to collapse `ModalBottomSheet`, but I ...

# compose

[Nthily]

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

[Erlan Amanatov]

It should be something like

BackHandler(
enabled = state==halfExpanded || state==Expanded,
onBack={ state = Collapsed
}
)

I think you will get the idea

[Nthily]

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

[Nthily]

[Erlan Amanatov]

I think your BackHandler located in a wrong place

[Nthily]

emm

[Nthily]

here

[Erlan Amanatov]

Try to move it into Musics

[Nthily]

emmm it still doesn't work

[patrick]

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

[Nthily]

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