Keyframe (lib_baseui API)

java.lang.Object
- com.nineoldandroids.animation.Keyframe

所有已实现的接口:

Cloneable
```
public abstract class Keyframe
extends Object
implements Cloneable
```
This class holds a time/value pair for an animation. The Keyframe class is used by ValueAnimator to define the values that the animation target will have over the course of the animation. As the time proceeds from one keyframe to the other, the value of the target object will animate between the value at the previous keyframe and the value at the next keyframe. Each keyframe also holds an optional TimeInterpolator object, which defines the time interpolation over the intervalue preceding the keyframe.
The Keyframe class itself is abstract. The type-specific factory methods will return a subclass of Keyframe specific to the type of value being stored. This is done to improve performance when dealing with the most common cases (e.g., float and int values). Other types will fall into a more general Keyframe class that treats its values as Objects. Unless your animation requires dealing with a custom type or a data structure that needs to be animated directly (and evaluated using an implementation of TypeEvaluator), you should stick to using float and int as animations using those types have lower runtime overhead than other types.

构造器概要

构造器
构造器和说明

Keyframe()

构造器
构造器和说明
`Keyframe()`

方法概要

所有方法静态方法实例方法抽象方法具体方法
限定符和类型	方法和说明
`abstract Keyframe`	`clone()`
`float`	`getFraction()` Gets the time for this keyframe, as a fraction of the overall animation duration.
`android.view.animation.Interpolator`	`getInterpolator()` Gets the optional interpolator for this Keyframe.
`Class`	`getType()` Gets the type of keyframe.
`abstract Object`	`getValue()` Gets the value for this Keyframe.
`boolean`	`hasValue()` Indicates whether this keyframe has a valid value.
`static Keyframe`	`ofFloat(float fraction)` Constructs a Keyframe object with the given time.
`static Keyframe`	`ofFloat(float fraction, float value)` Constructs a Keyframe object with the given time and value.
`static Keyframe`	`ofInt(float fraction)` Constructs a Keyframe object with the given time.
`static Keyframe`	`ofInt(float fraction, int value)` Constructs a Keyframe object with the given time and value.
`static Keyframe`	`ofObject(float fraction)` Constructs a Keyframe object with the given time.
`static Keyframe`	`ofObject(float fraction, Object value)` Constructs a Keyframe object with the given time and value.
`void`	`setFraction(float fraction)` Sets the time for this keyframe, as a fraction of the overall animation duration.
`void`	`setInterpolator(android.view.animation.Interpolator interpolator)` Sets the optional interpolator for this Keyframe.
`abstract void`	`setValue(Object value)` Sets the value for this Keyframe.

从类继承的方法 java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - Keyframe
```
public Keyframe()
```
- 方法详细资料
  - ofInt
```
public static Keyframe ofInt(float fraction,
                             int value)
```
    Constructs a Keyframe object with the given time and value. The time defines the time, as a proportion of an overall animation's duration, at which the value will hold true for the animation. The value for the animation between keyframes will be calculated as an interpolation between the values at those keyframes.
    
    参数:
    
    fraction - The time, expressed as a value between 0 and 1, representing the fraction of time elapsed of the overall animation duration.
    
    value - The value that the object will animate to as the animation time approaches the time in this keyframe, and the the value animated from as the time passes the time in this keyframe.
  - ofInt
```
public static Keyframe ofInt(float fraction)
```
    Constructs a Keyframe object with the given time. The value at this time will be derived from the target object when the animation first starts (note that this implies that keyframes with no initial value must be used as part of an ObjectAnimator). The time defines the time, as a proportion of an overall animation's duration, at which the value will hold true for the animation. The value for the animation between keyframes will be calculated as an interpolation between the values at those keyframes.
    
    参数:
    
    fraction - The time, expressed as a value between 0 and 1, representing the fraction of time elapsed of the overall animation duration.
  - ofFloat
```
public static Keyframe ofFloat(float fraction,
                               float value)
```
    Constructs a Keyframe object with the given time and value. The time defines the time, as a proportion of an overall animation's duration, at which the value will hold true for the animation. The value for the animation between keyframes will be calculated as an interpolation between the values at those keyframes.
    
    参数:
    
    fraction - The time, expressed as a value between 0 and 1, representing the fraction of time elapsed of the overall animation duration.
    
    value - The value that the object will animate to as the animation time approaches the time in this keyframe, and the the value animated from as the time passes the time in this keyframe.
  - ofFloat
```
public static Keyframe ofFloat(float fraction)
```
    Constructs a Keyframe object with the given time. The value at this time will be derived from the target object when the animation first starts (note that this implies that keyframes with no initial value must be used as part of an ObjectAnimator). The time defines the time, as a proportion of an overall animation's duration, at which the value will hold true for the animation. The value for the animation between keyframes will be calculated as an interpolation between the values at those keyframes.
    
    参数:
    
    fraction - The time, expressed as a value between 0 and 1, representing the fraction of time elapsed of the overall animation duration.
  - ofObject
```
public static Keyframe ofObject(float fraction,
                                Object value)
```
    Constructs a Keyframe object with the given time and value. The time defines the time, as a proportion of an overall animation's duration, at which the value will hold true for the animation. The value for the animation between keyframes will be calculated as an interpolation between the values at those keyframes.
    
    参数:
    
    fraction - The time, expressed as a value between 0 and 1, representing the fraction of time elapsed of the overall animation duration.
    
    value - The value that the object will animate to as the animation time approaches the time in this keyframe, and the the value animated from as the time passes the time in this keyframe.
  - ofObject
```
public static Keyframe ofObject(float fraction)
```
    Constructs a Keyframe object with the given time. The value at this time will be derived from the target object when the animation first starts (note that this implies that keyframes with no initial value must be used as part of an ObjectAnimator). The time defines the time, as a proportion of an overall animation's duration, at which the value will hold true for the animation. The value for the animation between keyframes will be calculated as an interpolation between the values at those keyframes.
    
    参数:
    
    fraction - The time, expressed as a value between 0 and 1, representing the fraction of time elapsed of the overall animation duration.
  - hasValue
```
public boolean hasValue()
```
    Indicates whether this keyframe has a valid value. This method is called internally when an ObjectAnimator first starts; keyframes without values are assigned values at that time by deriving the value for the property from the target object.
    
    返回:
    
    boolean Whether this object has a value assigned.
  - getValue
```
public abstract Object getValue()
```
    Gets the value for this Keyframe.
    
    返回:
    
    The value for this Keyframe.
  - setValue
```
public abstract void setValue(Object value)
```
    Sets the value for this Keyframe.
    
    参数:
    
    value - value for this Keyframe.
  - getFraction
```
public float getFraction()
```
    Gets the time for this keyframe, as a fraction of the overall animation duration.
    
    返回:
    
    The time associated with this keyframe, as a fraction of the overall animation duration. This should be a value between 0 and 1.
  - setFraction
```
public void setFraction(float fraction)
```
    Sets the time for this keyframe, as a fraction of the overall animation duration.
    
    参数:
    
    fraction - time associated with this keyframe, as a fraction of the overall animation duration. This should be a value between 0 and 1.
  - getInterpolator
```
public android.view.animation.Interpolator getInterpolator()
```
    Gets the optional interpolator for this Keyframe. A value of null indicates that there is no interpolation, which is the same as linear interpolation.
    
    返回:
    
    The optional interpolator for this Keyframe.
  - setInterpolator
```
public void setInterpolator(android.view.animation.Interpolator interpolator)
```
    Sets the optional interpolator for this Keyframe. A value of null indicates that there is no interpolation, which is the same as linear interpolation.
  - getType
```
public Class getType()
```
    Gets the type of keyframe. This information is used by ValueAnimator to determine the type of TypeEvaluator to use when calculating values between keyframes. The type is based on the type of Keyframe created.
    
    返回:
    
    The type of the value stored in the Keyframe.
  - clone
```
public abstract Keyframe clone()
```
    覆盖:
    
    clone 在类中 Object

类 Keyframe

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

Keyframe

方法详细资料

ofInt

ofInt

ofFloat

ofFloat

ofObject

ofObject

hasValue

getValue

setValue

getFraction

setFraction

getInterpolator

setInterpolator

getType

clone