Package icyllis.modernui.animation

Interface Keyframes

All Known Subinterfaces:
Keyframes.FloatKeyframes, Keyframes.IntKeyframes
All Known Implementing Classes:
KeyframeSet
public interface Keyframes
This interface abstracts a collection of Keyframe objects and is called by ValueAnimator to calculate values between those keyframes for a given animation.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Interface
    Description
    static interface 
    Keyframes.FloatKeyframes
     
    static interface 
    Keyframes.IntKeyframes
     

  • Method Summary

    Modifier and Type
    Method
    Description
    Keyframes
    copy()
     
    Keyframe[]
    getKeyframes()
     
    Object
    getValue(float fraction)
    Gets the animated value, given the elapsed fraction of the animation (interpolated by the animation's interpolator) and the evaluator used to calculate in-between values.
    void
    setEvaluator(TypeEvaluator<?> evaluator)
    Sets the TypeEvaluator to be used when calculating animated values.

  • Method Details

    • setEvaluator

      void setEvaluator(TypeEvaluator<?> evaluator)
      Sets the TypeEvaluator to be used when calculating animated values. This object is required only for Keyframes that are not either IntKeyframes or FloatKeyframes, both of which assume their own evaluator to speed up calculations with those primitive types.
      Parameters:
      evaluator - The TypeEvaluator to be used to calculate animated values.

    • getValue

      Object getValue(float fraction)
      Gets the animated value, given the elapsed fraction of the animation (interpolated by the animation's interpolator) and the evaluator used to calculate in-between values. This function maps the input fraction to the appropriate keyframe interval and a fraction between them and returns the interpolated value. Note that the input fraction may fall outside the [0-1] bounds, if the animation's interpolator made that happen (e.g., a spring interpolation that might send the fraction past 1.0). We handle this situation by just using the two keyframes at the appropriate end when the value is outside those bounds.
      Parameters:
      fraction - The elapsed fraction of the animation
      Returns:
      The animated value.

    • getKeyframes

      Keyframe[] getKeyframes()
      Returns:
      The backing array of all Keyframes contained by this. This may return null if this is not made up of Keyframes.

    • copy

      Keyframes copy()