MotionLayout.TransitionListener

Kotlin |Java

interface MotionLayout.TransitionListener

Known direct subclasses

`MotionHelperInterface`	This defined the interface for MotionLayout helpers Helpers can be used to draw motion effects or modify motions
`TransitionAdapter`

Known indirect subclasses

`Carousel`	Carousel works within a MotionLayout to provide a simple recycler like pattern.
`MotionEffect`	MotionHelper that automatically inserts keyframes for views moving in a given direction, out of:
`MotionHelper`

Listener for monitoring events about TransitionLayout. Added in 2.0

Summary

Public functions
`Unit`	`onTransitionChange( motionLayout: MotionLayout!, startId: Int, endId: Int, progress: Float )` Called when a drawer's position changes.
`Unit`	`onTransitionCompleted(motionLayout: MotionLayout!, currentId: Int)` Called when a drawer has settled completely a state.
`Unit`	`onTransitionStarted(motionLayout: MotionLayout!, startId: Int, endId: Int)` Called when a drawer is about to start a transition.
`Unit`	`onTransitionTrigger( motionLayout: MotionLayout!, triggerId: Int, positive: Boolean, progress: Float )` Call when a trigger is fired

fun onTransitionChange(
    motionLayout: MotionLayout!,
    startId: Int,
    endId: Int,
    progress: Float
): Unit

Called when a drawer's position changes.

Parameters
`motionLayout: MotionLayout!`	The TransitionLayout view that was moved
`startId: Int`	the id of the start state (or ConstraintSet). Will be -1 if unknown.
`endId: Int`	the id of the end state (or ConstraintSet).
`progress: Float`	The progress on this transition, from 0 to 1.

fun onTransitionCompleted(motionLayout: MotionLayout!, currentId: Int): Unit

Called when a drawer has settled completely a state. The TransitionLayout is interactive at this point.

Parameters
`motionLayout: MotionLayout!`	Drawer view that is now open
`currentId: Int`	the id it has reached

fun onTransitionStarted(motionLayout: MotionLayout!, startId: Int, endId: Int): Unit

Called when a drawer is about to start a transition. Note. startId may be -1 if starting from an "undefined state"

Parameters
`motionLayout: MotionLayout!`	The TransitionLayout view that was moved
`startId: Int`	the id of the start state (or ConstraintSet). Will be -1 if unknown.
`endId: Int`	the id of the end state (or ConstraintSet).

fun onTransitionTrigger(
    motionLayout: MotionLayout!,
    triggerId: Int,
    positive: Boolean,
    progress: Float
): Unit

Call when a trigger is fired

Parameters
`motionLayout: MotionLayout!`
`triggerId: Int`	The id set set with triggerID
`positive: Boolean`	for positive transition edge
`progress: Float`