ObservableFloat
public
class
ObservableFloat
extends BaseObservable
implements
Parcelable,
Serializable
java.lang.Object | ||
↳ | android.databinding.BaseObservable | |
↳ | android.databinding.ObservableFloat |
An observable class that holds a primitive float.
Observable field classes may be used instead of creating an Observable object. It can also create a calculated field, depending on other fields:
public class MyDataObject {
public final ObservableFloat temperatureC = new ObservableFloat();
public final ObservableFloat temperatureF = new ObservableFloat(temperatureC) {
@Override
public float get() { return (temperatureC.get() * 9 / 5) + 32; }
};
}
Fields of this type should be declared final because bindings only detect changes in the
field's value, not of the field itself.
This class is parcelable and serializable but callbacks are ignored when the object is parcelled / serialized. Unless you add custom callbacks, this will not be an issue because data binding framework always re-registers callbacks when the view is bound. A parceled ObservableField will lose its dependencies.
Summary
Inherited constants |
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From
interface
android.os.Parcelable
|
Fields | |
---|---|
public
static
final
Creator<ObservableFloat> |
CREATOR
|
Public constructors | |
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ObservableFloat(float value)
Creates an ObservableFloat with the given initial value. |
|
ObservableFloat()
Creates an ObservableFloat with the initial value of |
|
ObservableFloat(Observable... dependencies)
Creates an ObservableFloat that depends on |
Public methods | |
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int
|
describeContents()
|
float
|
get()
|
void
|
set(float value)
Set the stored value. |
void
|
writeToParcel(Parcel dest, int flags)
|
Inherited methods | |
---|---|
From
class
android.databinding.BaseObservable
| |
From
class
java.lang.Object
| |
From
interface
android.databinding.Observable
| |
From
interface
android.os.Parcelable
|
Fields
Public constructors
ObservableFloat
ObservableFloat (float value)
Creates an ObservableFloat with the given initial value.
Parameters | |
---|---|
value |
float : the initial value for the ObservableFloat
|
ObservableFloat
ObservableFloat ()
Creates an ObservableFloat with the initial value of 0f
.
ObservableFloat
ObservableFloat (Observable... dependencies)
Creates an ObservableFloat that depends on dependencies
. Typically,
ObservableField
s are passed as dependencies. When any dependency
notifies changes, this ObservableFloat also notifies a change.
Parameters | |
---|---|
dependencies |
Observable : The Observables that this ObservableFloat depends on.
|
Public methods
describeContents
int describeContents ()
Returns | |
---|---|
int |
get
float get ()
Returns | |
---|---|
float |
the stored value. |
set
void set (float value)
Set the stored value.
Parameters | |
---|---|
value |
float : The new value
|
Annotations
Interfaces
Classes
- BaseObservable
- CallbackRegistry
- CallbackRegistry.NotifierCallback
- DataBindingUtil
- ListChangeRegistry
- MapChangeRegistry
- MergedDataBinderMapper
- Observable.OnPropertyChangedCallback
- ObservableArrayList
- ObservableArrayMap
- ObservableBoolean
- ObservableByte
- ObservableChar
- ObservableDouble
- ObservableField
- ObservableFloat
- ObservableInt
- ObservableList.OnListChangedCallback
- ObservableLong
- ObservableMap.OnMapChangedCallback
- ObservableParcelable
- ObservableShort
- OnRebindCallback
- PropertyChangeRegistry
- ViewDataBinding
- ViewStubProxy