IT. Expert System.

All Known Implementing Classes:

AlphabetIndexer

public interface SectionIndexer

• Method Summary

  Methods

  Modifier and Type	Method and Description
  int	getPositionForSection(int section) Provides the starting index in the list for a given section.
  int	getSectionForPosition(int position) This is a reverse mapping to fetch the section index for a given position in the list.
  Object[]	getSections() This provides the list view with an array of section objects.

• Method Detail

  • getSections

    Object[] getSections()

    This provides the list view with an array of section objects. In the simplest case these are Strings, each containing one letter of the alphabet. They could be more complex objects that indicate the grouping for the adapter's consumption. The list view will call toString() on the objects to get the preview letter to display while scrolling.

    Returns:

    the array of objects that indicate the different sections of the list.

  • getPositionForSection

    int getPositionForSection(int section)

    Provides the starting index in the list for a given section.

    Parameters:

    section - the index of the section to jump to.

    Returns:

    the starting position of that section. If the section is out of bounds, the position must be clipped to fall within the size of the list.

  • getSectionForPosition

    int getSectionForPosition(int position)

    This is a reverse mapping to fetch the section index for a given position in the list.

    Parameters:

    position - the position for which to return the section

    Returns:

    the section index. If the position is out of bounds, the section index must be clipped to fall within the size of the section array.