Stay organized with collections
    
    
      
      Save and categorize content based on your preferences.
    
  
  
    
  
  
  
  
    
  
  
    
    
  
  
SimpleExpandableListAdapter
  public
  
  
  
  class
  SimpleExpandableListAdapter
  
  
  
  
    extends BaseExpandableListAdapter
  
  
  
  
  
  
  
    
  An easy adapter to map static data to group and child views defined in an XML
 file. You can separately specify the data backing the group as a List of
 Maps. Each entry in the ArrayList corresponds to one group in the expandable
 list. The Maps contain the data for each row. You also specify an XML file
 that defines the views used to display a group, and a mapping from keys in
 the Map to specific views. This process is similar for a child, except it is
 one-level deeper so the data backing is specified as a List>,
 where the first List corresponds to the group of the child, the second List
 corresponds to the position of the child within the group, and finally the
 Map holds the data for that particular child.
Summary
| Public constructors | 
|---|
  
  
  
    | 
      SimpleExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int expandedGroupLayout, int collapsedGroupLayout, String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout, int lastChildLayout, String[] childFrom, int[] childTo)
      Constructor
        
    
 | 
  
  
  
  
    | 
      SimpleExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int expandedGroupLayout, int collapsedGroupLayout, String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout, String[] childFrom, int[] childTo)
      Constructor
        
    
 | 
  
  
  
  
    | 
      SimpleExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int groupLayout, String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout, String[] childFrom, int[] childTo)
      Constructor
        
    
 | 
  
| Public methods | 
|---|
  
  
  
    | 
        
        
        
        
        
        Object | 
      getChild(int groupPosition, int childPosition)
       | 
  
  
  
  
    | 
        
        
        
        
        
        long | 
      getChildId(int groupPosition, int childPosition)
       | 
  
  
  
  
    | 
        
        
        
        
        
        View | 
      getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent)
       | 
  
  
  
  
    | 
        
        
        
        
        
        int | 
      getChildrenCount(int groupPosition)
       | 
  
  
  
  
    | 
        
        
        
        
        
        Object | 
      getGroup(int groupPosition)
       | 
  
  
  
  
    | 
        
        
        
        
        
        int | 
      getGroupCount()
       | 
  
  
  
  
    | 
        
        
        
        
        
        long | 
      getGroupId(int groupPosition)
       | 
  
  
  
  
    | 
        
        
        
        
        
        View | 
      getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
       | 
  
  
  
  
    | 
        
        
        
        
        
        boolean | 
      hasStableIds()
       | 
  
  
  
  
    | 
        
        
        
        
        
        boolean | 
      isChildSelectable(int groupPosition, int childPosition)
       | 
  
  
  
  
    | 
        
        
        
        
        
        View | 
      newChildView(boolean isLastChild, ViewGroup parent)
      Instantiates a new View for a child.
        
    
 | 
  
  
  
  
    | 
        
        
        
        
        
        View | 
      newGroupView(boolean isExpanded, ViewGroup parent)
      Instantiates a new View for a group.
        
    
 | 
  
| Inherited methods | 
|---|
| 
    From class
      
        
          android.widget.BaseExpandableListAdapter
        
      
      
  
  
  
    | 
        
        
        
        
        
        boolean | 
      areAllItemsEnabled()
       |  
  
  
    | 
        
        
        
        
        
        int | 
      getChildType(int groupPosition, int childPosition)
      Get the type of child View that will be created by
 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
 ExpandableListAdapter.getChildView(int, int, boolean, View, ViewGroup). |  
  
  
    | 
        
        
        
        
        
        long | 
      getCombinedChildId(long groupId, long childId)
      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. |  
  
  
    | 
        
        
        
        
        
        long | 
      getCombinedGroupId(long groupId)
      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. |  
  
  
    | 
        
        
        
        
        
        int | 
      getGroupType(int groupPosition)
      Get the type of group View that will be created by
 ExpandableListAdapter.getGroupView(int, boolean, View, ViewGroup). |  
  
  
    | 
        
        
        
        
        
        int | 
      getGroupTypeCount()
      
 Returns the number of types of group Views that will be created by
 ExpandableListAdapter.getGroupView(int, boolean, View, ViewGroup). |  
  
  
    | 
        
        
        
        
        
        boolean | 
      isEmpty()
      
        
    
 |  
  
  
    | 
        
        
        
        
        
        void | 
      notifyDataSetChanged()
       |  
  
  
    | 
        
        
        
        
        
        void | 
      notifyDataSetInvalidated()
       |  
  
  
    | 
        
        
        
        
        
        void | 
      onGroupCollapsed(int groupPosition)
      Called when a group is collapsed.
        
    
 |  
  
  
    | 
        
        
        
        
        
        void | 
      onGroupExpanded(int groupPosition)
      Called when a group is expanded.
        
    
 |  
  
  
    | 
        
        
        
        
        
        void | 
      registerDataSetObserver(DataSetObserver observer)
       |  
  
  
    | 
        
        
        
        
        
        void | 
      unregisterDataSetObserver(DataSetObserver observer)
       |  | 
| 
    From class
      
        
          java.lang.Object
        
      
      
  
  
  
    | 
        
        
        
        
        
        Object | 
      clone()
      Creates and returns a copy of this object.
        
    
 |  
  
  
    | 
        
        
        
        
        
        boolean | 
      equals(Object obj)
      Indicates whether some other object is "equal to" this one.
        
    
 |  
  
  
    | 
        
        
        
        
        
        void | 
      finalize()
      Called by the garbage collector on an object when garbage collection
 determines that there are no more references to the object.
        
    
 |  
  
  
    | 
        
        
        
        final
        
        Class<?> | 
      getClass()
      Returns the runtime class of this Object. |  
  
  
    | 
        
        
        
        
        
        int | 
      hashCode()
      Returns a hash code value for the object.
        
    
 |  
  
  
    | 
        
        
        
        final
        
        void | 
      notify()
      Wakes up a single thread that is waiting on this object's
 monitor.
        
    
 |  
  
  
    | 
        
        
        
        final
        
        void | 
      notifyAll()
      Wakes up all threads that are waiting on this object's monitor.
        
    
 |  
  
  
    | 
        
        
        
        
        
        String | 
      toString()
      Returns a string representation of the object.
        
    
 |  
  
  
    | 
        
        
        
        final
        
        void | 
      wait(long timeoutMillis, int nanos)
      Causes the current thread to wait until it is awakened, typically
 by being notified or interrupted, or until a
 certain amount of real time has elapsed.
        
    
 |  
  
  
    | 
        
        
        
        final
        
        void | 
      wait(long timeoutMillis)
      Causes the current thread to wait until it is awakened, typically
 by being notified or interrupted, or until a
 certain amount of real time has elapsed.
        
    
 |  
  
  
    | 
        
        
        
        final
        
        void | 
      wait()
      Causes the current thread to wait until it is awakened, typically
 by being notified or interrupted.
        
    
 |  | 
| 
    From interface
      
        
          android.widget.ExpandableListAdapter
        
      
      
  
  
  
    | 
        abstract
        
        
        
        
        boolean | 
      areAllItemsEnabled()
       |  
  
  
    | 
        abstract
        
        
        
        
        Object | 
      getChild(int groupPosition, int childPosition)
      Gets the data associated with the given child within the given group.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        long | 
      getChildId(int groupPosition, int childPosition)
      Gets the ID for the given child within the given group.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        View | 
      getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent)
      Gets a View that displays the data for the given child within the given
 group.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        int | 
      getChildrenCount(int groupPosition)
      Gets the number of children in a specified group.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        long | 
      getCombinedChildId(long groupId, long childId)
      Gets an ID for a child that is unique across any item (either group or
 child) that is in this list.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        long | 
      getCombinedGroupId(long groupId)
      Gets an ID for a group that is unique across any item (either group or
 child) that is in this list.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        Object | 
      getGroup(int groupPosition)
      Gets the data associated with the given group.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        int | 
      getGroupCount()
      Gets the number of groups.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        long | 
      getGroupId(int groupPosition)
      Gets the ID for the group at the given position.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        View | 
      getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
      Gets a View that displays the given group.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        boolean | 
      hasStableIds()
      Indicates whether the child and group IDs are stable across changes to the
 underlying data.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        boolean | 
      isChildSelectable(int groupPosition, int childPosition)
      Whether the child at the specified position is selectable.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        boolean | 
      isEmpty()
       |  
  
  
    | 
        abstract
        
        
        
        
        void | 
      onGroupCollapsed(int groupPosition)
      Called when a group is collapsed.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        void | 
      onGroupExpanded(int groupPosition)
      Called when a group is expanded.
        
    
 |  
  
  
    | 
        abstract
        
        
        
        
        void | 
      registerDataSetObserver(DataSetObserver observer)
       |  
  
  
    | 
        abstract
        
        
        
        
        void | 
      unregisterDataSetObserver(DataSetObserver observer)
       |  | 
| 
    From interface
      
        
          android.widget.HeterogeneousExpandableList
        
      
      
  
  
  
    | 
        abstract
        
        
        
        
        int | 
      getChildType(int groupPosition, int childPosition)
      Get the type of child View that will be created by
 ExpandableListAdapter.getChildView(int, int, boolean, View, ViewGroup)for the specified child item. |  
  
  
    | 
        abstract
        
        
        
        
        int | 
      getChildTypeCount()
      
 Returns the number of types of child Views that will be created by
 ExpandableListAdapter.getChildView(int, int, boolean, View, ViewGroup). |  
  
  
    | 
        abstract
        
        
        
        
        int | 
      getGroupType(int groupPosition)
      Get the type of group View that will be created by
 ExpandableListAdapter.getGroupView(int, boolean, View, ViewGroup). |  
  
  
    | 
        abstract
        
        
        
        
        int | 
      getGroupTypeCount()
      
 Returns the number of types of group Views that will be created by
 ExpandableListAdapter.getGroupView(int, boolean, View, ViewGroup). |  | 
Public constructors
    SimpleExpandableListAdapter
    
public SimpleExpandableListAdapter (Context context, 
                List<? extends Map<String, ?>> groupData, 
                int expandedGroupLayout, 
                int collapsedGroupLayout, 
                String[] groupFrom, 
                int[] groupTo, 
                List<? extends List<? extends Map<String, ?>>> childData, 
                int childLayout, 
                int lastChildLayout, 
                String[] childFrom, 
                int[] childTo)
    
    
    
  Constructor
    
    | Parameters | 
|---|
      
        | context | Context: The context where theExpandableListViewassociated with thisSimpleExpandableListAdapteris
            running | 
      
        | groupData | List: A List of Maps. Each entry in the List corresponds to
            one group in the list. The Maps contain the data for each
            group, and should include all the entries specified in
            "groupFrom" | 
      
        | expandedGroupLayout | int: resource identifier of a view layout that
            defines the views for an expanded group. The layout file
            should include at least those named views defined in "groupTo" | 
      
        | collapsedGroupLayout | int: resource identifier of a view layout that
            defines the views for a collapsed group. The layout file
            should include at least those named views defined in "groupTo" | 
      
        | groupFrom | String: A list of keys that will be fetched from the Map
            associated with each group. | 
      
        | groupTo | int: The group views that should display column in the
            "groupFrom" parameter. These should all be TextViews. The
            first N views in this list are given the values of the first N
            columns in the groupFrom parameter. | 
      
        | childData | List: A List of List of Maps. Each entry in the outer List
            corresponds to a group (index by group position), each entry
            in the inner List corresponds to a child within the group
            (index by child position), and the Map corresponds to the data
            for a child (index by values in the childFrom array). The Map
            contains the data for each child, and should include all the
            entries specified in "childFrom" | 
      
        | childLayout | int: resource identifier of a view layout that defines the
            views for a child (unless it is the last child within a group,
            in which case the lastChildLayout is used). The layout file
            should include at least those named views defined in "childTo" | 
      
        | lastChildLayout | int: resource identifier of a view layout that defines
            the views for the last child within each group. The layout
            file should include at least those named views defined in
            "childTo" | 
      
        | childFrom | String: A list of keys that will be fetched from the Map
            associated with each child. | 
      
        | childTo | int: The child views that should display column in the
            "childFrom" parameter. These should all be TextViews. The
            first N views in this list are given the values of the first N
            columns in the childFrom parameter. | 
    
 
    SimpleExpandableListAdapter
    
public SimpleExpandableListAdapter (Context context, 
                List<? extends Map<String, ?>> groupData, 
                int expandedGroupLayout, 
                int collapsedGroupLayout, 
                String[] groupFrom, 
                int[] groupTo, 
                List<? extends List<? extends Map<String, ?>>> childData, 
                int childLayout, 
                String[] childFrom, 
                int[] childTo)
    
    
    
  Constructor
    
    | Parameters | 
|---|
      
        | context | Context: The context where theExpandableListViewassociated with thisSimpleExpandableListAdapteris
            running | 
      
        | groupData | List: A List of Maps. Each entry in the List corresponds to
            one group in the list. The Maps contain the data for each
            group, and should include all the entries specified in
            "groupFrom" | 
      
        | expandedGroupLayout | int: resource identifier of a view layout that
            defines the views for an expanded group. The layout file
            should include at least those named views defined in "groupTo" | 
      
        | collapsedGroupLayout | int: resource identifier of a view layout that
            defines the views for a collapsed group. The layout file
            should include at least those named views defined in "groupTo" | 
      
        | groupFrom | String: A list of keys that will be fetched from the Map
            associated with each group. | 
      
        | groupTo | int: The group views that should display column in the
            "groupFrom" parameter. These should all be TextViews. The
            first N views in this list are given the values of the first N
            columns in the groupFrom parameter. | 
      
        | childData | List: A List of List of Maps. Each entry in the outer List
            corresponds to a group (index by group position), each entry
            in the inner List corresponds to a child within the group
            (index by child position), and the Map corresponds to the data
            for a child (index by values in the childFrom array). The Map
            contains the data for each child, and should include all the
            entries specified in "childFrom" | 
      
        | childLayout | int: resource identifier of a view layout that defines the
            views for a child. The layout file should include at least
            those named views defined in "childTo" | 
      
        | childFrom | String: A list of keys that will be fetched from the Map
            associated with each child. | 
      
        | childTo | int: The child views that should display column in the
            "childFrom" parameter. These should all be TextViews. The
            first N views in this list are given the values of the first N
            columns in the childFrom parameter. | 
    
 
    SimpleExpandableListAdapter
    
public SimpleExpandableListAdapter (Context context, 
                List<? extends Map<String, ?>> groupData, 
                int groupLayout, 
                String[] groupFrom, 
                int[] groupTo, 
                List<? extends List<? extends Map<String, ?>>> childData, 
                int childLayout, 
                String[] childFrom, 
                int[] childTo)
    
    
    
  Constructor
    
    | Parameters | 
|---|
      
        | context | Context: The context where theExpandableListViewassociated with thisSimpleExpandableListAdapteris
            running | 
      
        | groupData | List: A List of Maps. Each entry in the List corresponds to
            one group in the list. The Maps contain the data for each
            group, and should include all the entries specified in
            "groupFrom" | 
      
        | groupLayout | int: resource identifier of a view layout that defines the
            views for a group. The layout file should include at least
            those named views defined in "groupTo" | 
      
        | groupFrom | String: A list of keys that will be fetched from the Map
            associated with each group. | 
      
        | groupTo | int: The group views that should display column in the
            "groupFrom" parameter. These should all be TextViews. The
            first N views in this list are given the values of the first N
            columns in the groupFrom parameter. | 
      
        | childData | List: A List of List of Maps. Each entry in the outer List
            corresponds to a group (index by group position), each entry
            in the inner List corresponds to a child within the group
            (index by child position), and the Map corresponds to the data
            for a child (index by values in the childFrom array). The Map
            contains the data for each child, and should include all the
            entries specified in "childFrom" | 
      
        | childLayout | int: resource identifier of a view layout that defines the
            views for a child. The layout file should include at least
            those named views defined in "childTo" | 
      
        | childFrom | String: A list of keys that will be fetched from the Map
            associated with each child. | 
      
        | childTo | int: The child views that should display column in the
            "childFrom" parameter. These should all be TextViews. The
            first N views in this list are given the values of the first N
            columns in the childFrom parameter. | 
    
 
Public methods
    getChild
    
public Object getChild (int groupPosition, 
                int childPosition)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
      
        | childPosition | int | 
    
    
 
    getChildId
    
public long getChildId (int groupPosition, 
                int childPosition)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
      
        | childPosition | int | 
    
    
 
    getChildView
    
public View getChildView (int groupPosition, 
                int childPosition, 
                boolean isLastChild, 
                View convertView, 
                ViewGroup parent)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
      
        | childPosition | int | 
      
        | isLastChild | boolean | 
      
        | convertView | View | 
      
        | parent | ViewGroup | 
    
    
 
    getChildrenCount
    
public int getChildrenCount (int groupPosition)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
    
    
 
    getGroup
    
public Object getGroup (int groupPosition)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
    
    
 
    getGroupCount
    
public int getGroupCount ()
    
    
    
  
    
 
    getGroupId
    
public long getGroupId (int groupPosition)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
    
    
 
    getGroupView
    
public View getGroupView (int groupPosition, 
                boolean isExpanded, 
                View convertView, 
                ViewGroup parent)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
      
        | isExpanded | boolean | 
      
        | convertView | View | 
      
        | parent | ViewGroup | 
    
    
 
    hasStableIds
    
public boolean hasStableIds ()
    
    
    
  
    
 
    isChildSelectable
    
public boolean isChildSelectable (int groupPosition, 
                int childPosition)
    
    
    
  
    
    | Parameters | 
|---|
      
        | groupPosition | int | 
      
        | childPosition | int | 
    
    
 
    newChildView
    
public View newChildView (boolean isLastChild, 
                ViewGroup parent)
    
    
    
  Instantiates a new View for a child.
    
    | Parameters | 
|---|
      
        | isLastChild | boolean: Whether the child is the last child within its group. | 
      
        | parent | ViewGroup: The eventual parent of this new View. | 
    
    
      | Returns | 
|---|
      
        | View | A new child View | 
    
 
    newGroupView
    
public View newGroupView (boolean isExpanded, 
                ViewGroup parent)
    
    
    
  Instantiates a new View for a group.
    
    | Parameters | 
|---|
      
        | isExpanded | boolean: Whether the group is currently expanded. | 
      
        | parent | ViewGroup: The eventual parent of this new View. | 
    
    
      | Returns | 
|---|
      
        | View | A new group View | 
    
 
 
 
  
  
    
  
 
  
    
    
      
       
    
    
  
  
  Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
  Last updated 2025-02-10 UTC.
  
  
  
    
      [null,null,["Last updated 2025-02-10 UTC."],[],[]]