updateTransition

@Composable
public fun <T> updateTransition(targetState: T, label: String? = null): Transition<T>

This sets up a Transition, and updates it with the target provided by targetState. When targetState changes, Transition will run all of its child animations towards their target values specified for the new targetState. Child animations can be dynamically added using Transition.animateFloat, animateColor, Transition.animateValue, etc.

label is used to differentiate different transitions in Android Studio.

Note: There is another rememberTransition overload that accepts a MutableTransitionState. The difference between the two is that the MutableTransitionState variant: 1) supports a different initial state than target state (This would allow a transition to start as soon as it enters composition.) 2) can be recreated to intentionally trigger a re-start of the transition.

Returns

Deprecated Use rememberTransition() instead

@Composable
public fun <T> updateTransition(
    transitionState: MutableTransitionState<T>,
    label: String? = null,
): Transition<T>

Creates a Transition and puts it in the currentState of the provided transitionState. Whenever the targetState of the transitionState changes, the Transition will animate to the new target state.

Remember: The provided transitionState needs to be remembered.

Compared to the rememberTransition variant that takes a targetState, this function supports a different initial state than the first targetState. Here is an example:

In most cases, it is recommended to reuse the same transitionState that is remembered, such that Transition preserves continuity when targetState is changed. However, in some rare cases it is more critical to immediately snap to a state change (e.g. in response to a user interaction). This can be achieved by creating a new transitionState: