Summary: Methods

MotionLayout.TransitionListener

This package is part of the Android support library which is no longer maintained. The Constraint Layout support library has been superseded by the AndroidX Constraint Layout library, which is part of Jetpack. The MotionLayout.TransitionListener interface has been superseded by androidx.constraintlayout.motion.widget.MotionLayout.TransitionListener. We recommend using the AndroidX libraries in all new projects. You should also consider migrating existing projects to AndroidX.

public static interface MotionLayout.TransitionListener

android.support.constraint.motion.MotionLayout.TransitionListener

Known indirect subclasses

TransitionAdapter

Added in 2.0

Listener for monitoring events about TransitionLayout.

Summary

Public methods
`abstract void`	`onTransitionChange(MotionLayout motionLayout, int startId, int endId, float progress)` Called when a drawer's position changes.
`abstract void`	`onTransitionCompleted(MotionLayout motionLayout, int currentId)` Called when a drawer has settled completely a state.
`abstract void`	`onTransitionStarted(MotionLayout motionLayout, int startId, int endId)` Called when a drawer is about to start a transition.
`abstract void`	`onTransitionTrigger(MotionLayout motionLayout, int triggerId, boolean positive, float progress)` Call when a trigger is fired

Public methods

onTransitionChange

public abstract void onTransitionChange (MotionLayout motionLayout, 
                int startId, 
                int endId, 
                float progress)

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.

onTransitionCompleted

public abstract void onTransitionCompleted (MotionLayout motionLayout, 
                int currentId)

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

onTransitionStarted

public abstract void onTransitionStarted (MotionLayout motionLayout, 
                int startId, 
                int endId)

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).

onTransitionTrigger

public abstract void onTransitionTrigger (MotionLayout motionLayout, 
                int triggerId, 
                boolean positive, 
                float progress)

Call when a trigger is fired

Parameters
`triggerId`	`int`: The id set set with triggerID
`positive`	`boolean`: for positive transition edge