Package icyllis.modernui.widget

Class HeaderViewListAdapter

java.lang.Object
icyllis.modernui.widget.HeaderViewListAdapter
All Implemented Interfaces:
Adapter, Filterable, ListAdapter, WrapperListAdapter
public class HeaderViewListAdapter extends Object implements WrapperListAdapter, Filterable
ListAdapter used when a ListView has header views. This ListAdapter wraps another one and also keeps track of the header views and their associated data objects.

This is intended as a base class; you will probably not need to use this class directly in your own code.

  • Constructor Details

  • Method Details

    • getHeadersCount

      public int getHeadersCount()

    • getFootersCount

      public int getFootersCount()

    • isEmpty

      public boolean isEmpty()
      Specified by:
      isEmpty in interface Adapter
      Returns:
      true if this adapter doesn't contain any data. This is used to determine whether the empty view should be displayed. A typical implementation will return getCount() == 0 but since getCount() includes the headers and footers, specialized adapters might want a different behavior.

    • removeHeader

      public boolean removeHeader(@Nonnull View v)

    • removeFooter

      public boolean removeFooter(@Nonnull View v)

    • getCount

      public int getCount()
      Description copied from interface: Adapter
      How many items are in the data set represented by this Adapter.
      Specified by:
      getCount in interface Adapter
      Returns:
      Count of items.

    • areAllItemsEnabled

      public boolean areAllItemsEnabled()
      Description copied from interface: ListAdapter
      Indicates whether all the items in this adapter are enabled. If the value returned by this method changes over time, there is no guarantee it will take effect. If true, it means all items are selectable and clickable (there is no separator.)
      Specified by:
      areAllItemsEnabled in interface ListAdapter
      Returns:
      True if all items are enabled, false otherwise.
      See Also:

    • isEnabled

      public boolean isEnabled(int position)
      Description copied from interface: ListAdapter
      Returns true if the item at the specified position is not a separator. (A separator is a non-selectable, non-clickable item).

      The result is unspecified if position is invalid. An ArrayIndexOutOfBoundsException should be thrown in that case for fast failure.

      Specified by:
      isEnabled in interface ListAdapter
      Parameters:
      position - Index of the item
      Returns:
      True if the item is not a separator
      See Also:

    • getItem

      public Object getItem(int position)
      Description copied from interface: Adapter
      Get the data item associated with the specified position in the data set.
      Specified by:
      getItem in interface Adapter
      Parameters:
      position - Position of the item whose data we want within the adapter's data set.
      Returns:
      The data at the specified position, may be null.

    • getItemId

      public long getItemId(int position)
      Description copied from interface: Adapter
      Get the row id associated with the specified position in the list.
      Specified by:
      getItemId in interface Adapter
      Parameters:
      position - The position of the item within the adapter's data set whose row id we want.
      Returns:
      The id of the item at the specified position.

    • hasStableIds

      public boolean hasStableIds()
      Description copied from interface: Adapter
      Indicates whether the item ids are stable across changes to the underlying data.
      Specified by:
      hasStableIds in interface Adapter
      Returns:
      True if the same id always refers to the same object.

    • getView

      @Nonnull public View getView(int position, @Nullable View convertView, @Nonnull ViewGroup parent)
      Description copied from interface: Adapter
      Get a View that displays the data at the specified position in the data set. You can create a View manually.

      This method should not return null unless the item count is zero.

      Specified by:
      getView in interface Adapter
      Parameters:
      position - The position of the item within the adapter's data set of the item whose view we want.
      convertView - The old view to reuse, if possible. Note: You should check that this view is non-null and of an appropriate type before using. If it is not possible to convert this view to display the correct data, this method can create a new view. Heterogeneous lists can specify their number of view types, so that this View is always of the right type (see Adapter.getViewTypeCount() and Adapter.getItemViewType(int)).
      parent - The parent that this view will eventually be attached to
      Returns:
      A View corresponding to the data at the specified position.

    • getItemViewType

      public int getItemViewType(int position)
      Description copied from interface: Adapter
      Get the type of View that will be created by Adapter.getView(int, icyllis.modernui.view.View, icyllis.modernui.view.ViewGroup) for the specified item.
      Specified by:
      getItemViewType in interface Adapter
      Parameters:
      position - The position of the item within the adapter's data set whose view type we want.
      Returns:
      An integer representing the type of View. Two views should share the same type if one can be converted to the other in Adapter.getView(int, icyllis.modernui.view.View, icyllis.modernui.view.ViewGroup). Note: Integers must be in the range 0 to Adapter.getViewTypeCount() - 1. Adapter.IGNORE_ITEM_VIEW_TYPE can also be returned.
      See Also:

    • getViewTypeCount

      public int getViewTypeCount()
      Description copied from interface: Adapter

      Returns the number of types of Views that will be created by Adapter.getView(int, icyllis.modernui.view.View, icyllis.modernui.view.ViewGroup). Each type represents a set of views that can be converted in Adapter.getView(int, icyllis.modernui.view.View, icyllis.modernui.view.ViewGroup). If the adapter always returns the same type of View for all items, this method should return 1.

      This method will only be called when the adapter is set on the AdapterView.

      Specified by:
      getViewTypeCount in interface Adapter
      Returns:
      The number of types of Views that will be created by this adapter

    • registerDataSetObserver

      public void registerDataSetObserver(@Nonnull DataSetObserver observer)
      Description copied from interface: Adapter
      Register an observer that is called when changes happen to the data used by this adapter.
      Specified by:
      registerDataSetObserver in interface Adapter
      Parameters:
      observer - the object that gets notified when the data set changes.

    • unregisterDataSetObserver

      public void unregisterDataSetObserver(@Nonnull DataSetObserver observer)
      Description copied from interface: Adapter
      Unregister an observer that has previously been registered with this adapter via Adapter.registerDataSetObserver(icyllis.modernui.util.DataSetObserver).
      Specified by:
      unregisterDataSetObserver in interface Adapter
      Parameters:
      observer - the object to unregister.

    • getFilter

      public Filter getFilter()
      Description copied from interface: Filterable

      Returns a filter that can be used to constrain data with a filtering pattern.

      This method is usually implemented by Adapter classes.

      Specified by:
      getFilter in interface Filterable
      Returns:
      a filter used to constrain data

    • getWrappedAdapter

      public ListAdapter getWrappedAdapter()
      Description copied from interface: WrapperListAdapter
      Returns the adapter wrapped by this list adapter.
      Specified by:
      getWrappedAdapter in interface WrapperListAdapter
      Returns:
      The ListAdapter wrapped by this adapter.