Hello, i'm trying to only change a variable only w...

# compose

[Felipe Passos]

Hello, i'm trying to only change a variable only when this column is focused, but it keeps getting the inicial last_location value when it is not focused.
PS: location is a state variable

Sem título.kt

[Sergey B]

create a state for last_location1 and change it in the onFocusChanged callback

[Felipe Passos]

Oh, thank you!. Could you explain to me why this works?

[Sergey B]

Updating a state triggers re-composition. Changing a normal variable can't trigger re-composition. Therefore your Column composable is not getting re-composed.
PS. This is a good example of side-effects that you should avoid 🙂
https://developer.android.com/jetpack/compose/mental-model - this a very good article that explain how it works 🙂