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

Object clone()

Creates and returns a copy of this object.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

void finalize()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

final Class<?> getClass()

Returns the runtime class of this Object.

int hashCode()

Returns a hash code value for the object.

final void notify()

Wakes up a single thread that is waiting on this object's monitor.

final void notifyAll()

Wakes up all threads that are waiting on this object's monitor.

String toString()

Returns a string representation of the object.

final void wait(long timeoutMillis, int nanos)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait(long timeoutMillis)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait()

Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

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

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

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.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.