Summary: Ctors | Methods | Inherited Methods

BidirectionalTypeConverter

Kotlin |Java

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.

See also:

PropertyValuesHolder.setConverter(TypeConverter)

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
`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

From class


        
          androidx.core.animation.TypeConverter


      convert(T value)

Converts a value from one type to another.

From class


        
          java.lang.Object

`Object`	`clone()`
`boolean`	`equals(Object arg0)`
`void`	`finalize()`
`final Class<?>`	`getClass()`
`int`	`hashCode()`
`final void`	`notify()`
`final void`	`notifyAll()`
`String`	`toString()`
`final void`	`wait(long arg0, int arg1)`
`final void`	`wait(long arg0)`
`final void`	`wait()`

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

Returns
`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.