SparseArrayObjectAdapter
public
class
SparseArrayObjectAdapter
extends ObjectAdapter
java.lang.Object | ||
↳ | androidx.leanback.widget.ObjectAdapter | |
↳ | androidx.leanback.widget.SparseArrayObjectAdapter |
An ObjectAdapter
implemented with a SparseArray
.
This class maintains an array of objects where each object is associated
with an integer key which determines its order relative to other objects.
Summary
Inherited constants |
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Public constructors | |
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SparseArrayObjectAdapter(PresenterSelector presenterSelector)
Constructs an adapter with the given |
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SparseArrayObjectAdapter(Presenter presenter)
Constructs an adapter with the given |
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SparseArrayObjectAdapter()
Constructs an adapter. |
Public methods | |
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void
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clear(int key)
Clears the given key and associated item from the adapter. |
void
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clear()
Removes all items from this adapter, leaving it empty. |
Object
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get(int position)
Returns the item for the given position. |
int
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indexOf(Object item)
Returns the index for the given item in the adapter. |
int
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indexOf(int key)
Returns the index for the given key in the adapter. |
boolean
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isImmediateNotifySupported()
Returns true if the adapter pairs each underlying data change with a call to notify and false otherwise. |
Object
|
lookup(int key)
Returns the object for the given key, or null if no mapping for that key exists. |
void
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notifyArrayItemRangeChanged(int positionStart, int itemCount)
Notify that the content of a range of items changed. |
void
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set(int key, Object item)
Sets the item for the given key. |
int
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size()
Returns the number of items in the adapter. |
Inherited methods | |
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Public constructors
SparseArrayObjectAdapter
public SparseArrayObjectAdapter (PresenterSelector presenterSelector)
Constructs an adapter with the given PresenterSelector
.
Parameters | |
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presenterSelector |
PresenterSelector |
SparseArrayObjectAdapter
public SparseArrayObjectAdapter (Presenter presenter)
Constructs an adapter with the given Presenter
.
Parameters | |
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presenter |
Presenter |
SparseArrayObjectAdapter
public SparseArrayObjectAdapter ()
Constructs an adapter.
Public methods
clear
public void clear (int key)
Clears the given key and associated item from the adapter.
Parameters | |
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key |
int : The key to be cleared.
|
clear
public void clear ()
Removes all items from this adapter, leaving it empty.
get
public Object get (int position)
Returns the item for the given position.
Parameters | |
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position |
int |
Returns | |
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Object |
indexOf
public int indexOf (Object item)
Returns the index for the given item in the adapter.
Parameters | |
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item |
Object : The item to find in the array. |
Returns | |
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int |
Index of the item, or a negative value if not found. |
indexOf
public int indexOf (int key)
Returns the index for the given key in the adapter.
Parameters | |
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key |
int : The key to find in the array. |
Returns | |
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int |
Index of the item, or a negative value if not found. |
isImmediateNotifySupported
public boolean isImmediateNotifySupported ()
Returns true if the adapter pairs each underlying data change with a call to notify and false otherwise.
Returns | |
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boolean |
lookup
public Object lookup (int key)
Returns the object for the given key, or null if no mapping for that key exists.
Parameters | |
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key |
int |
Returns | |
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Object |
notifyArrayItemRangeChanged
public void notifyArrayItemRangeChanged (int positionStart, int itemCount)
Notify that the content of a range of items changed. Note that this is not same as items being added or removed.
Parameters | |
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positionStart |
int : The position of first item that has changed. |
itemCount |
int : The count of how many items have changed.
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set
public void set (int key, Object item)
Sets the item for the given key.
Parameters | |
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key |
int : The key associated with the item. |
item |
Object : The item associated with the key.
|
size
public int size ()
Returns the number of items in the adapter.
Returns | |
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int |