core/androidx.core.view/[main]VelocityTrackerCompat

VelocityTrackerCompat

class VelocityTrackerCompat(source)

Helper for accessing features in VelocityTracker.

Types

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Functions

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open fun addMovement(@NonNull tracker: @NonNull VelocityTracker, @NonNull event: @NonNull MotionEvent)
Add a user's movement to the tracker.
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open fun clear(@NonNull tracker: @NonNull VelocityTracker)
Reset the velocity tracker back to its initial state.
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open fun computeCurrentVelocity(@NonNull tracker: @NonNull VelocityTracker, units: Int)
Equivalent to invoking computeCurrentVelocity with a maximum velocity of Float.MAX_VALUE.
open fun computeCurrentVelocity(@NonNull tracker: @NonNull VelocityTracker, units: Int, maxVelocity: Float)
Compute the current velocity based on the points that have been collected.
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open fun getAxisVelocity(@NonNull tracker: @NonNull VelocityTracker, axis: Int): Float
Equivalent to calling getAxisVelocity for axis and the active pointer.
open fun getAxisVelocity(@NonNull tracker: @NonNull VelocityTracker, axis: Int, pointerId: Int): Float
Retrieve the last computed velocity for a given motion axis.
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open fun getXVelocity(tracker: VelocityTracker, pointerId: Int): Float
Call getXVelocity.
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open fun getYVelocity(tracker: VelocityTracker, pointerId: Int): Float
Call getYVelocity.
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open fun isAxisSupported(@NonNull tracker: @NonNull VelocityTracker, axis: Int): Boolean
Checks whether a given velocity-trackable MotionEvent axis is supported for velocity tracking by this VelocityTracker instance (refer to getAxisVelocity for a list of potentially velocity-trackable axes).
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open fun recycle(@NonNull tracker: @NonNull VelocityTracker)
Return a VelocityTracker object back to be re-used by others.