CursorTreeAdapter

Kotlin |Java

abstract class CursorTreeAdapter : BaseExpandableListAdapter, Filterable

kotlin.Any
↳	android.widget.BaseExpandableListAdapter
	↳	android.widget.CursorTreeAdapter

Known Direct Subclasses

ResourceCursorTreeAdapter

A fairly simple ExpandableListAdapter that creates views defined in an XML file.

Known Indirect Subclasses

SimpleCursorTreeAdapter

An easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file.

An adapter that exposes data from a series of Cursors to an ExpandableListView widget. The top-level Cursor (that is given in the constructor) exposes the groups, while subsequent Cursors returned from getChildrenCursor(android.database.Cursor) expose children within a particular group. The Cursors must include a column named "_id" or this class will not work.

Summary

Public constructors
`CursorTreeAdapter(cursor: Cursor!, context: Context!)` Constructor.
`CursorTreeAdapter(cursor: Cursor!, context: Context!, autoRequery: Boolean)` Constructor.

Public methods
open Unit	`changeCursor(cursor: Cursor!)`
open String!	`convertToString(cursor: Cursor!)`
open Cursor!	`getChild(groupPosition: Int, childPosition: Int)` Gets the data associated with the given child within the given group.
open Long	`getChildId(groupPosition: Int, childPosition: Int)` Gets the ID for the given child within the given group.
open View!	`getChildView(groupPosition: Int, childPosition: Int, isLastChild: Boolean, convertView: View!, parent: ViewGroup!)` Gets a View that displays the data for the given child within the given group.
open Int	`getChildrenCount(groupPosition: Int)` Gets the number of children in a specified group.
open Cursor!	`getCursor()`
open Filter!	`getFilter()` Returns a filter that can be used to constrain data with a filtering pattern.
open FilterQueryProvider!	`getFilterQueryProvider()`
open Cursor!	`getGroup(groupPosition: Int)` Gets the data associated with the given group.
open Int	`getGroupCount()` Gets the number of groups.
open Long	`getGroupId(groupPosition: Int)` Gets the ID for the group at the given position.
open View!	`getGroupView(groupPosition: Int, isExpanded: Boolean, convertView: View!, parent: ViewGroup!)` Gets a View that displays the given group.
open Boolean	`hasStableIds()` Indicates whether the child and group IDs are stable across changes to the underlying data.
open Boolean	`isChildSelectable(groupPosition: Int, childPosition: Int)` Whether the child at the specified position is selectable.
open Unit	`notifyDataSetChanged()`
open Unit	`notifyDataSetChanged(releaseCursors: Boolean)` Notifies a data set change, but with the option of not releasing any cached cursors.
open Unit	`notifyDataSetInvalidated()`
open Unit	`onGroupCollapsed(groupPosition: Int)` Called when a group is collapsed.
open Cursor!	`runQueryOnBackgroundThread(constraint: CharSequence!)`
open Unit	`setChildrenCursor(groupPosition: Int, childrenCursor: Cursor!)` Sets the children Cursor for a particular group.
open Unit	`setFilterQueryProvider(filterQueryProvider: FilterQueryProvider!)`
open Unit	`setGroupCursor(cursor: Cursor!)` Sets the group Cursor.

Protected methods
abstract Unit	`bindChildView(view: View!, context: Context!, cursor: Cursor!, isLastChild: Boolean)` Bind an existing view to the child data pointed to by cursor
abstract Unit	`bindGroupView(view: View!, context: Context!, cursor: Cursor!, isExpanded: Boolean)` Bind an existing view to the group data pointed to by cursor.
abstract Cursor!	`getChildrenCursor(groupCursor: Cursor!)` Gets the Cursor for the children at the given group.
abstract View!	`newChildView(context: Context!, cursor: Cursor!, isLastChild: Boolean, parent: ViewGroup!)` Makes a new child view to hold the data pointed to by cursor.
abstract View!	`newGroupView(context: Context!, cursor: Cursor!, isExpanded: Boolean, parent: ViewGroup!)` Makes a new group view to hold the group data pointed to by cursor.

Inherited functions

From class BaseExpandableListAdapter

`Boolean`	`areAllItemsEnabled()`
`Int`	`getChildType(groupPosition: Int, childPosition: Int)` Get the type of child View that will be created by `android.widget.ExpandableListAdapter#getChildView(int, int, boolean, View, ViewGroup)` for the specified child item.
`Int`	`getChildTypeCount()` Returns the number of types of child Views that will be created by `android.widget.ExpandableListAdapter#getChildView(int, int, boolean, View, ViewGroup)` . Each type represents a set of views that can be converted in `android.widget.ExpandableListAdapter#getChildView(int, int, boolean, View, ViewGroup)` , for any group. If the adapter always returns the same type of View for all child items, this method should return 1. This method will only be called when the adapter is set on the `AdapterView`.
`Long`	`getCombinedChildId(groupId: Long, childId: Long)` Override this method if you foresee a clash in IDs based on this scheme: Base implementation returns a long: bit 0: Whether this ID points to a child (unset) or group (set), so for this method this bit will be 1. bit 1-31: Lower 31 bits of the groupId bit 32-63: Lower 32 bits of the childId. Gets an ID for a child that is unique across any item (either group or child) that is in this list. Expandable lists require each item (group or child) to have a unique ID among all children and groups in the list. This method is responsible for returning that unique ID given a child's ID and its group's ID. Furthermore, if `hasStableIds()` is true, the returned ID must be stable as well.
`Long`	`getCombinedGroupId(groupId: Long)` Override this method if you foresee a clash in IDs based on this scheme: Base implementation returns a long: bit 0: Whether this ID points to a child (unset) or group (set), so for this method this bit will be 0. bit 1-31: Lower 31 bits of the groupId bit 32-63: Lower 32 bits of the childId. Gets an ID for a group that is unique across any item (either group or child) that is in this list. Expandable lists require each item (group or child) to have a unique ID among all children and groups in the list. This method is responsible for returning that unique ID given a group's ID. Furthermore, if `hasStableIds()` is true, the returned ID must be stable as well.
`Int`	`getGroupType(groupPosition: Int)` Get the type of group View that will be created by `android.widget.ExpandableListAdapter#getGroupView(int, boolean, View, ViewGroup)` . for the specified group item.
`Int`	`getGroupTypeCount()` Returns the number of types of group Views that will be created by `android.widget.ExpandableListAdapter#getGroupView(int, boolean, View, ViewGroup)` . Each type represents a set of views that can be converted in `android.widget.ExpandableListAdapter#getGroupView(int, boolean, View, ViewGroup)` . If the adapter always returns the same type of View for all group items, this method should return 1. This method will only be called when the adapter is set on the `AdapterView`.
`Boolean`	`isEmpty()`
`Unit`	`onGroupExpanded(groupPosition: Int)` Called when a group is expanded.
`Unit`	`registerDataSetObserver(observer: DataSetObserver!)`
`Unit`	`unregisterDataSetObserver(observer: DataSetObserver!)`

From class ExpandableListAdapter

`Any!`	`getChild(groupPosition: Int, childPosition: Int)` Gets the data associated with the given child within the given group.
`Long`	`getChildId(groupPosition: Int, childPosition: Int)` Gets the ID for the given child within the given group. This ID must be unique across all children within the group. The combined ID (see `getCombinedChildId(long,long)`) must be unique across ALL items (groups and all children).
`View!`	`getChildView(groupPosition: Int, childPosition: Int, isLastChild: Boolean, convertView: View!, parent: ViewGroup!)` Gets a View that displays the data for the given child within the given group.
`Int`	`getChildrenCount(groupPosition: Int)` Gets the number of children in a specified group.
`Any!`	`getGroup(groupPosition: Int)` Gets the data associated with the given group.
`Int`	`getGroupCount()` Gets the number of groups.
`Long`	`getGroupId(groupPosition: Int)` Gets the ID for the group at the given position. This group ID must be unique across groups. The combined ID (see `getCombinedGroupId(long)`) must be unique across ALL items (groups and all children).
`View!`	`getGroupView(groupPosition: Int, isExpanded: Boolean, convertView: View!, parent: ViewGroup!)` Gets a View that displays the given group. This View is only for the group--the Views for the group's children will be fetched using `getChildView(int,int,boolean,android.view.View,android.view.ViewGroup)`.
`Boolean`	`hasStableIds()` Indicates whether the child and group IDs are stable across changes to the underlying data.
`Boolean`	`isChildSelectable(groupPosition: Int, childPosition: Int)` Whether the child at the specified position is selectable.

Parameters
`cursor`	Cursor!: The cursor from which to get the data for the groups.
`context`	Context!: The context
`autoRequery`	Boolean: If true the adapter will call `Cursor.requery()` on the cursor whenever it changes so the most recent data is always displayed.

Parameters
`groupPosition`	Int: the position of the group that the child resides in
`childPosition`	Int: the position of the child with respect to other children in the group

Parameters
`groupPosition`	Int: the position of the group that contains the child
`childPosition`	Int: the position of the child within the group for which the ID is wanted

Parameters
`groupPosition`	Int: the position of the group for which the View is returned
`isExpanded`	Boolean: whether the group is expanded or collapsed
`convertView`	View!: the old view to reuse, if possible. 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. It is not guaranteed that the convertView will have been previously created by `getGroupView(int,boolean,android.view.View,android.view.ViewGroup)`.
`parent`	ViewGroup!: the parent that this view will eventually be attached to

Parameters
`groupPosition`	Int: The group whose children are being set via this Cursor.
`childrenCursor`	Cursor!: The Cursor that contains the children of the group.

Parameters
`view`	View!: Existing view, returned earlier by newChildView
`context`	Context!: Interface to application's global information
`cursor`	Cursor!: The cursor from which to get the data. The cursor is already moved to the correct position.
`isLastChild`	Boolean: Whether the child is the last child within its group.

CursorTreeAdapter

Summary

Public constructors

CursorTreeAdapter

CursorTreeAdapter

Public methods

changeCursor

convertToString

getChild

getChildId

getChildView

getChildrenCount

getCursor

getFilter

getFilterQueryProvider

getGroup

getGroupCount

getGroupId

getGroupView

hasStableIds

isChildSelectable

notifyDataSetChanged

notifyDataSetChanged

notifyDataSetInvalidated

onGroupCollapsed

runQueryOnBackgroundThread

setChildrenCursor

setFilterQueryProvider

setGroupCursor

Protected methods

bindChildView

bindGroupView

getChildrenCursor

newChildView

newGroupView