BidirectionalTypeConverter
public
abstract
class
BidirectionalTypeConverter
extends TypeConverter<T, V>
java.lang.Object | ||
↳ | androidx.core.animation.TypeConverter<T, V> | |
↳ | androidx.core.animation.BidirectionalTypeConverter<T, V> |
Abstract base class used convert type T to another type V and back again. This is necessary when the value types of in animation are different from the property type. BidirectionalTypeConverter is needed when only the final value for the animation is supplied to animators.
Summary
Public constructors | |
---|---|
BidirectionalTypeConverter(Class<T> fromClass, Class<V> toClass)
Constructor for creating a bidirectional type converter instance that can convert type T to another type V and back again. |
Public methods | |
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abstract
T
|
convertBack(V value)
Does a conversion from the target type back to the source type. |
BidirectionalTypeConverter<V, T>
|
invert()
Returns the inverse of this converter, where the from and to classes are reversed. |
Inherited methods | |
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Public constructors
BidirectionalTypeConverter
public BidirectionalTypeConverter (Class<T> fromClass, Class<V> toClass)
Constructor for creating a bidirectional type converter instance that can convert type T to another type V and back again.
Parameters | |
---|---|
fromClass |
Class : class of type T |
toClass |
Class : class of type V
|
Public methods
convertBack
public abstract T convertBack (V value)
Does a conversion from the target type back to the source type. The subclass must implement this when a TypeConverter is used in animations and current values will need to be read for an animation.
Parameters | |
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value |
V : The Object to convert. |
Returns | |
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T |
A value of type T, converted from value .
|
invert
public BidirectionalTypeConverter<V, T> invert ()
Returns the inverse of this converter, where the from and to classes are reversed.
The inverted converter uses this convert to call convertBack(Object)
for
TypeConverter.convert(Object)
calls and TypeConverter.convert(Object)
for
convertBack(Object)
calls.
Returns | |
---|---|
BidirectionalTypeConverter<V, T> |
The inverse of this converter, where the from and to classes are reversed. |