CardScrollAdapter

Added in API level XE12

A special form of a BaseAdapter.

Use this in combination with a CardScrollView to implement horizontally scrolling views, also referred to as cards. This adapter binds (possibly dynamic) data to the CardScrollView by retrieving the data (if needed) and converting each data item into a card. Each card visually represents a certain Object item.

To be consistent with the Glass UI, create cards with the CardBuilder class, which supports several content layouts. If you require more flexibility, you can create your own XML layouts or create views programmatically.

See Scrolling cards in activities for more information.

Inherited Constants
From interface android.widget.Adapter int IGNORE_ITEM_VIEW_TYPE int NO_SELECTION

Public Constructors
	CardScrollAdapter()

Public Methods
abstract int	getCount()
int	getHomePosition()
abstract Object	getItem(int position)
long	getItemId(int position)
int	getItemViewType(int position)
abstract int	getPosition(Object item)
abstract View	getView(int position, View convertView, ViewGroup parent)
int	getViewTypeCount()

Inherited Methods
From class android.widget.BaseAdapter boolean areAllItemsEnabled() View getDropDownView(int arg0, View arg1, ViewGroup arg2) int getItemViewType(int arg0) int getViewTypeCount() boolean hasStableIds() boolean isEmpty() boolean isEnabled(int arg0) void notifyDataSetChanged() void notifyDataSetInvalidated() void registerDataSetObserver(DataSetObserver arg0) void unregisterDataSetObserver(DataSetObserver arg0)
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() final void wait(long arg0, int arg1) final void wait(long arg0)
From interface android.widget.Adapter abstract int getCount() abstract Object getItem(int arg0) abstract long getItemId(int arg0) abstract int getItemViewType(int arg0) abstract View getView(int arg0, View arg1, ViewGroup arg2) abstract int getViewTypeCount() abstract boolean hasStableIds() abstract boolean isEmpty() abstract void registerDataSetObserver(DataSetObserver arg0) abstract void unregisterDataSetObserver(DataSetObserver arg0)
From interface android.widget.ListAdapter abstract boolean areAllItemsEnabled() abstract boolean isEnabled(int arg0)
From interface android.widget.SpinnerAdapter abstract View getDropDownView(int arg0, View arg1, ViewGroup arg2)

Public Constructors

Added in API level XE12

public CardScrollAdapter ()

Public Methods

Added in API level XE12

public abstract int getCount ()

Added in API level XE12

public int getHomePosition ()

Returns the home position. The default implementation simply assumes position 0 is the home position, but the user can override this method to move the home position to a different card.

For example, the home position of the Glass timeline is the clock card, and other cards can be located both to the left and to the right of it.

Returns

• the position of the item that represents the home position

Added in API level XE12

public abstract Object getItem (int position)

Added in API level XE12

public long getItemId (int position)

The default implementation simply assigns the card's position as row identifier and assumes this property holds even across data changes. When each data item has a truly unique row identifier, users can override this method to return the real row identifier and override hasStableIds() to return true. By doing so, the card scroller is more likely to maintain its view on selected cards across data changes.

public int getItemViewType (int position)

Added in API level XE16

public abstract int getPosition (Object item)

Finds the position of the given item.

Parameters

item	the item to find

Returns

• the position of the given item, or INVALID_POSITION if the item cannot be found

Added in API level XE12

public abstract View getView (int position, View convertView, ViewGroup parent)

public int getViewTypeCount ()

The default implementation returns 0 to signal lack of recycling. Users can override this method (only called once when adapter is set) and getItemViewType(int) to enable view recycling.