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PointFEvaluator

public class PointFEvaluator
extends Object implements TypeEvaluator<PointF>

java.lang.Object
   ↳ android.animation.PointFEvaluator


This evaluator can be used to perform type interpolation between PointF values.

Summary

Public constructors

PointFEvaluator()

Construct a PointFEvaluator that returns a new PointF on every evaluate call.

PointFEvaluator(PointF reuse)

Constructs a PointFEvaluator that modifies and returns reuse in evaluate(float, android.graphics.PointF, android.graphics.PointF) calls.

Public methods

PointF evaluate(float fraction, PointF startValue, PointF endValue)

This function returns the result of linearly interpolating the start and end PointF values, with fraction representing the proportion between the start and end values.

Inherited methods

Public constructors

PointFEvaluator

added in API level 21
public PointFEvaluator ()

Construct a PointFEvaluator that returns a new PointF on every evaluate call. To avoid creating an object for each evaluate call, PointFEvaluator(android.graphics.PointF) should be used whenever possible.

PointFEvaluator

added in API level 21
public PointFEvaluator (PointF reuse)

Constructs a PointFEvaluator that modifies and returns reuse in evaluate(float, android.graphics.PointF, android.graphics.PointF) calls. The value returned from evaluate(float, android.graphics.PointF, android.graphics.PointF) should not be cached because it will change over time as the object is reused on each call.

Parameters
reuse PointF: A PointF to be modified and returned by evaluate.

Public methods

evaluate

added in API level 21
public PointF evaluate (float fraction, 
                PointF startValue, 
                PointF endValue)

This function returns the result of linearly interpolating the start and end PointF values, with fraction representing the proportion between the start and end values. The calculation is a simple parametric calculation on each of the separate components in the PointF objects (x, y).

If PointFEvaluator(android.graphics.PointF) was used to construct this PointFEvaluator, the object returned will be the reuse passed into the constructor.

Parameters
fraction float: The fraction from the starting to the ending values

startValue PointF: The start PointF

endValue PointF: The end PointF

Returns
PointF A linear interpolation between the start and end values, given the fraction parameter.