Dynamic ExpandableListView
- by JLB
Can anyone tell me how I can Dynamically add groups & children to an ExpandableListView. The purpose is to create a type of task list that I can add new items/groups to.
I can populate the view with pre-filled arrays but of course can't add to them to populate the list further. The other method i tried was using the SimpleExpandableListAdapter. Using this i am able to add groups from a List but when it comes to adding children i can only add 1 item per group.
public List<Map<String, String>> groupData = new ArrayList<Map<String, String>>();
public List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();
public void addGroup(String group) {
Map curGroupMap = new HashMap();
groupData.add(curGroupMap);
curGroupMap.put(NAME, group);
//Add an empty child or else the app will crash when group is expanded.
List<Map<String, String>> children = new ArrayList<Map<String, String>>();
Map<String, String> curChildMap = new HashMap<String, String>();
children.add(curChildMap);
curChildMap.put(NAME, "EMPTY");
childData.add(children);
updateAdapter();
}
public void addChild(String child) {
List children = new ArrayList();
Map curChildMap = new HashMap();
children.add(curChildMap);
curChildMap.put(NAME, child);
curChildMap.put(IS_EVEN, "This child is even");
childData.add(activeGroup, children);
updateAdapter();
}
