# FloatProperty Added in[API level 24](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) # FloatProperty *** ** * ** *** Kotlin\|[Java](https://developer.android.com/reference/android/util/FloatProperty "View this page in Java") ``` abstract class FloatProperty : Property ``` |---|---|----------------------------------------------------------------------------------------------------------| | [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) ||| | ↳ | [android.util.Property](https://developer.android.com/reference/kotlin/android/util/Property)\ || | | ↳ | [android.util.FloatProperty](https://developer.android.com/reference/kotlin/android/util/FloatProperty#) | An implementation of[android.util.Property](https://developer.android.com/reference/kotlin/android/util/Property)to be used specifically with fields of type`float`. This type-specific subclass enables performance benefit by allowing calls to a[setValue()](https://developer.android.com/reference/kotlin/android/util/FloatProperty#setValue(android.util.FloatProperty.T,%20kotlin.Float))function that takes the primitive`float`type and avoids autoboxing and other overhead associated with the`Float`class. ## Summary | Public constructors || |-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | [FloatProperty](https://developer.android.com/reference/kotlin/android/util/FloatProperty#FloatProperty(kotlin.String))`(`name:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
| | Public methods || |--------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [set](https://developer.android.com/reference/kotlin/android/util/FloatProperty#set(android.util.FloatProperty.T,%20kotlin.Float))`(`object:` `T`, `value:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)!`)`
| | abstract[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setValue](https://developer.android.com/reference/kotlin/android/util/FloatProperty#setValue(android.util.FloatProperty.T,%20kotlin.Float))`(`object:` `T`, `value:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` A type-specific variant of[set(java.lang.Object,java.lang.Float)](https://developer.android.com/reference/kotlin/android/util/FloatProperty#set(android.util.FloatProperty.T,%20kotlin.Float))that is faster when dealing with fields of type`float`. | | Inherited functions || |---|---| | From class[Property](https://developer.android.com/reference/kotlin/android/util/Property) |-------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | V | [get](https://developer.android.com/reference/kotlin/android/util/Property#get(android.util.Property.T))`(`object:` `T`)`
Returns the current value that this property represents on the given`object`.
| | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)! | [getName](https://developer.android.com/reference/kotlin/android/util/Property#getName())`()`
Returns the name for this property.
| | [Class](https://developer.android.com/reference/kotlin/java/lang/Class.html#)! | [getType](https://developer.android.com/reference/kotlin/android/util/Property#getType())`()`
Returns the type for this property.
| | [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isReadOnly](https://developer.android.com/reference/kotlin/android/util/Property#isReadOnly())`()`
Returns true if the[set(java.lang.Object,java.lang.Object)](https://developer.android.com/reference/kotlin/android/util/Property#set(android.util.Property.T,%20android.util.Property.V))method does not set the value on the target object (in which case the[set()](https://developer.android.com/reference/kotlin/android/util/Property#set(android.util.Property.T,%20android.util.Property.V))method should throw a[NoSuchPropertyException](https://developer.android.com/reference/kotlin/android/util/NoSuchPropertyException)exception). This may happen if the Property wraps functionality that allows querying the underlying value but not setting it. For example, the[of(java.lang.Class,java.lang.Class,java.lang.String)](https://developer.android.com/reference/kotlin/android/util/Property#of(java.lang.Class,%20java.lang.Class,%20kotlin.String))factory method may return a Property with name "foo" for an object that has only a`getFoo()`or`isFoo()`method, but no matching`setFoo()`method.
| | [Property](https://developer.android.com/reference/kotlin/android/util/Property)! | [of](https://developer.android.com/reference/kotlin/android/util/Property#of(java.lang.Class,%20java.lang.Class,%20kotlin.String))`(`hostType:` `[Class](https://developer.android.com/reference/kotlin/java/lang/Class.html#)!`, `valueType:` `[Class](https://developer.android.com/reference/kotlin/java/lang/Class.html#)!`, `name:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
This factory method creates and returns a Property given the`class`and`name`parameters, where the`"name"`parameter represents either: - a public`getName()`method on the class which takes no arguments, plus an optional public`setName()`method which takes a value of the same type returned by`getName()` - a public`isName()`method on the class which takes no arguments, plus an optional public`setName()`method which takes a value of the same type returned by`isName()` - a public`name`field on the class
If either of the get/is method alternatives is found on the class, but an appropriate`setName()`method is not found, the`Property`will be[readOnly](https://developer.android.com/reference/kotlin/android/util/Property#isReadOnly()). Calling the[set(java.lang.Object,java.lang.Object)](https://developer.android.com/reference/kotlin/android/util/Property#set(android.util.Property.T,%20android.util.Property.V))method on such a property is allowed, but will have no effect. If neither the methods nor the field are found on the class a[NoSuchPropertyException](https://developer.android.com/reference/kotlin/android/util/NoSuchPropertyException)exception will be thrown.
| || ## Public constructors ### FloatProperty Added in[API level 24](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` FloatProperty(name: String!) ``` ## Public methods ### set Added in[API level 24](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` fun set(     object: T,     value: Float! ): Unit ``` ### setValue Added in[API level 24](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` abstract fun setValue(     object: T,     value: Float ): Unit ``` A type-specific variant of[set(java.lang.Object,java.lang.Float)](https://developer.android.com/reference/kotlin/android/util/FloatProperty#set(android.util.FloatProperty.T,%20kotlin.Float))that is faster when dealing with fields of type`float`.