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Added in API level 21

Summary: Ctors | Methods | Inherited Methods | [Expand All]

public abstract class BidirectionalTypeConverter
extends TypeConverter<T, V>

java.lang.Object
↳	android.animation.TypeConverter<T, V>
	↳	android.animation.BidirectionalTypeConverter<T, V>

抽象基类使用转换类型T到另一个类型V并返回。当动画的值类型与属性类型不同时，这是必需的。只有动画的最终值被提供给动画制作者时，才需要BidirectionalTypeConverter。

也可以看看：

Public constructors
`BidirectionalTypeConverter(Class<T> fromClass, Class<V> toClass)`

Public methods
`abstract T`	`convertBack(V value)` 是否从目标类型转换回源类型。
`BidirectionalTypeConverter<V, T>`	`invert()` 返回此转换器的反转，其中从和反转类。

From class android.animation.TypeConverter

From class java.lang.Object

Added in API level 21

BidirectionalTypeConverter (Class<T> fromClass, 
                Class<V> toClass)

Parameters
`fromClass`	`Class`
`toClass`	`Class`

Added in API level 21

T convertBack (V value)

是否从目标类型转换回源类型。子类必须在动画中使用TypeConverter时执行此操作，并且需要为动画读取当前值。

Parameters
`value`	`V`: The Object to convert.

Returns
`T`	A value of type T, converted from `value`.

Added in API level 21

BidirectionalTypeConverter<V, T> invert ()

返回此转换器的反转，其中从和反转类。倒置转换器使用该转换调用convertBack(Object)为convert(Object)电话和convert(Object)为convertBack(Object)电话。

Returns
`BidirectionalTypeConverter<V, T>`	The inverse of this converter, where the from and to classes are reversed.