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ObjectAdapter

public abstract class ObjectAdapter
extends Object

java.lang.Object
↳	android.support.v17.leanback.widget.ObjectAdapter

Known Direct Subclasses

ArrayObjectAdapter, CursorObjectAdapter, SparseArrayObjectAdapter

Base class adapter to be used in leanback activities. Provides access to a data model and is decoupled from the presentation of the items via PresenterSelector.

Summary

Nested classes
`class`	`ObjectAdapter.DataObserver` A DataObserver can be notified when an ObjectAdapter's underlying data changes.

Constants
`int`	`NO_ID` Indicates that an id has not been set.

Public constructors
`ObjectAdapter(PresenterSelector presenterSelector)` Constructs an adapter with the given `PresenterSelector`.
`ObjectAdapter(Presenter presenter)` Constructs an adapter that uses the given `Presenter` for all items.
`ObjectAdapter()` Constructs an adapter.

Public methods
`abstract Object`	`get(int position)` Returns the item for the given position.
`long`	`getId(int position)` Returns the id for the given position.
`final Presenter`	`getPresenter(Object item)` Returns the `Presenter` for the given item from the adapter.
`final PresenterSelector`	`getPresenterSelector()` Returns the presenter selector for this ObjectAdapter.
`final boolean`	`hasStableIds()` Returns true if the item ids are stable across changes to the underlying data.
`final void`	`registerObserver(ObjectAdapter.DataObserver observer)` Registers a DataObserver for data change notifications.
`final void`	`setHasStableIds(boolean hasStableIds)` Sets whether the item ids are stable across changes to the underlying data.
`final void`	`setPresenterSelector(PresenterSelector presenterSelector)` Sets the presenter selector.
`abstract int`	`size()` Returns the number of items in the adapter.
`final void`	`unregisterAllObservers()` Unregisters all DataObservers for this ObjectAdapter.
`final void`	`unregisterObserver(ObjectAdapter.DataObserver observer)` Unregisters a DataObserver for data change notifications.

Protected methods
`final void`	`notifyChanged()`
`final void`	`notifyItemRangeChanged(int positionStart, int itemCount)`
`final void`	`notifyItemRangeInserted(int positionStart, int itemCount)`
`final void`	`notifyItemRangeRemoved(int positionStart, int itemCount)`
`void`	`onHasStableIdsChanged()` Called when `setHasStableIds(boolean)` is called and the status of stable ids has changed.
`void`	`onPresenterSelectorChanged()` Called when `setPresenterSelector(PresenterSelector)` is called and the PresenterSelector differs from the previous one.

Inherited methods

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Constants

NO_ID

int NO_ID

Indicates that an id has not been set.

Constant Value: -1 (0xffffffff)

Public constructors

ObjectAdapter

ObjectAdapter (PresenterSelector presenterSelector)

Constructs an adapter with the given PresenterSelector.

Parameters
`presenterSelector`	`PresenterSelector`

ObjectAdapter

ObjectAdapter (Presenter presenter)

Constructs an adapter that uses the given Presenter for all items.

Parameters
`presenter`	`Presenter`

ObjectAdapter

ObjectAdapter ()

Constructs an adapter.

Public methods

get

Object get (int position)

Returns the item for the given position.

Parameters
`position`	`int`

Returns
`Object`

getId

long getId (int position)

Returns the id for the given position.

Parameters
`position`	`int`

Returns
`long`

getPresenter

Presenter getPresenter (Object item)

Returns the Presenter for the given item from the adapter.

Parameters
`item`	`Object`

Returns
`Presenter`

getPresenterSelector

PresenterSelector getPresenterSelector ()

Returns the presenter selector for this ObjectAdapter.

Returns
`PresenterSelector`

hasStableIds

boolean hasStableIds ()

Returns true if the item ids are stable across changes to the underlying data. When this is true, clients of the ObjectAdapter can use getId(int) to correlate Objects across changes.

Returns
`boolean`

registerObserver

void registerObserver (ObjectAdapter.DataObserver observer)

Registers a DataObserver for data change notifications.

Parameters
`observer`	`ObjectAdapter.DataObserver`

setHasStableIds

void setHasStableIds (boolean hasStableIds)

Sets whether the item ids are stable across changes to the underlying data.

Parameters
`hasStableIds`	`boolean`

setPresenterSelector

void setPresenterSelector (PresenterSelector presenterSelector)

Sets the presenter selector. May not be null.

Parameters
`presenterSelector`	`PresenterSelector`

size

int size ()

Returns the number of items in the adapter.

Returns
`int`

unregisterAllObservers

void unregisterAllObservers ()

Unregisters all DataObservers for this ObjectAdapter.

unregisterObserver

void unregisterObserver (ObjectAdapter.DataObserver observer)

Unregisters a DataObserver for data change notifications.

Parameters
`observer`	`ObjectAdapter.DataObserver`

Protected methods

notifyChanged

void notifyChanged ()

notifyItemRangeChanged

void notifyItemRangeChanged (int positionStart, 
                int itemCount)

Parameters
`positionStart`	`int`
`itemCount`	`int`

notifyItemRangeInserted

void notifyItemRangeInserted (int positionStart, 
                int itemCount)

Parameters
`positionStart`	`int`
`itemCount`	`int`

notifyItemRangeRemoved

void notifyItemRangeRemoved (int positionStart, 
                int itemCount)

Parameters
`positionStart`	`int`
`itemCount`	`int`

onHasStableIdsChanged

void onHasStableIdsChanged ()

Called when setHasStableIds(boolean) is called and the status of stable ids has changed.

onPresenterSelectorChanged

void onPresenterSelectorChanged ()

Called when setPresenterSelector(PresenterSelector) is called and the PresenterSelector differs from the previous one.

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ObjectAdapter

Summary

Nested classes

Constants

Public constructors

Public methods

Protected methods

Inherited methods

Constants

NO_ID

Public constructors

ObjectAdapter

ObjectAdapter

ObjectAdapter

Public methods

get

getId

getPresenter

getPresenterSelector

hasStableIds

registerObserver

setHasStableIds

setPresenterSelector

size

unregisterAllObservers

unregisterObserver

Protected methods

notifyChanged

notifyItemRangeChanged

notifyItemRangeInserted

notifyItemRangeRemoved

onHasStableIdsChanged

onPresenterSelectorChanged