BidirectionalTypeConverter

abstract class BidirectionalTypeConverter<T, V> : TypeConverter

kotlin.Any
   ↳ androidx.core.animation.TypeConverter
     ↳ androidx.core.animation.BidirectionalTypeConverter

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.

Parameters
<T>

type T. It can be converted from and to type V
<V>

type V. It can be converted from and to type T
See also
setConverter

Summary

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

Constructor for creating a bidirectional type converter instance that can convert type T to another type V and back again.

Public functions
abstract T
convertBack(value: V)

Does a conversion from the target type back to the source type.
BidirectionalTypeConverter<V!, T!>

Returns the inverse of this converter, where the from and to classes are reversed.

Inherited functions
From androidx.core.animation.TypeConverter
abstract V
convert(value: T)

Converts a value from one type to another.

Public constructors

BidirectionalTypeConverter

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

Constructor for creating a bidirectional type converter instance that can convert type T to another type V and back again.

Parameters
fromClass: Class<T!>

class of type T
toClass: Class<V!>

class of type V

Public functions

convertBack

abstract fun convertBack(value: V): T

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
value: V

The Object to convert.
Returns
T

A value of type T, converted from value.

invert

fun invert(): BidirectionalTypeConverter<V!, T!>

Returns the inverse of this converter, where the from and to classes are reversed. The inverted converter uses this convert to call convertBack for convert calls and convert for convertBack calls.

Returns
BidirectionalTypeConverter<V!, T!>

The inverse of this converter, where the from and to classes are reversed.