TransitionSeekController

abstract void addOnProgressChangedListener(
    @NonNull Consumer<TransitionSeekController> consumer
)

Add a listener for whenever the progress of the transition is changed. This will be called when setCurrentPlayTimeMillis or setCurrentFraction are called as well as when the animation from animateToEnd or animateToStart changes the progress.

abstract void addOnReadyListener(
    @NonNull Consumer<TransitionSeekController> onReadyListener
)

Adds a listener to know when isReady is true. The listener will be removed once notified as isReady can only be made true once. If isReady is already true, then it will be notified immediately.

abstract void animateToEnd()

Runs the animation forwards toward the end. setCurrentPlayTimeMillis will not be allowed after executing this. When the animation completes, onTransitionEnd will be called with the isReverse parameter false. After the Transition ends, the state will reach the final state set after controlDelayedTransition. After calling this, setCurrentPlayTimeMillis may not be called.

abstract void animateToStart(@NonNull Runnable resetToStartState)

Runs the animation backwards toward the start. setCurrentPlayTimeMillis will not be allowed after executing this. When the animation completes, resetToStart will be executed to set the state back to the starting state and onTransitionEnd will be called with the isReverse parameter true. If resetToStartState does not properly set the state back to starting state, onTransitionEnd will still be called, but the UI will jump to the end state instead of the start state.

abstract boolean isReady()

Returns true when the Transition is ready to seek or false when the Transition's animations have yet to be built.

abstract void removeOnProgressChangedListener(
    @NonNull Consumer<TransitionSeekController> consumer
)

Remove a listener previously added in addOnProgressChangedListener

abstract void removeOnReadyListener(
    @NonNull Consumer<TransitionSeekController> onReadyListener
)

Removes onReadyListener that was previously added in addOnReadyListener so that it won't be called.

abstract void setCurrentFraction(@FloatRange(from = 0.0, to = 1.0) float fraction)

Sets the position of the Transition's animation. fraction should be between 0 and 1, inclusive, where 0 indicates that the transition hasn't progressed and 1 indicates that the transition is completed. Calling this before isReady is true will do nothing.

abstract void setCurrentPlayTimeMillis(@IntRange(from = 0) long playTimeMillis)

Sets the position of the Transition's animation. playTimeMillis should be between 0 and getDurationMillis. Calling this before isReady is true will do nothing.