例如,我有一个编辑文本和一个按钮。按下按钮时,文本将添加到我的可扩展列表视图中的第一个组中,并在其下方添加每个后续项目。谢谢。 (如果您需要我到目前为止的代码,请索取。)
答案 0 :(得分:6)
首先应该创建自己的自定义适配器。 一旦创建了这样的类。
public class ExpandableListParentClass{
private Object parent;
private ArrayList<Object> parentChildren;
public ExpandableListParentClass() {
}
public ExpandableListParentClass(Object parent, ArrayList<Object> parentChildren) {
this.parent = parent;
this.parentChildren = parentChildren;
}
public Object getParent() {
return parent;
}
public void setParent(Object parent) {
this.parent = parent;
}
public ArrayList<Object> getParentChildren() {
return parentChildren;
}
public void setParentChildren(ArrayList<Object> parentChildren) {
this.parentChildren = parentChildren;
}
}
并创建适配器
public class ExpandableListAdapter extends BaseExpandableListAdapter implements Filterable{
private LayoutInflater inflater;
private ArrayList<ExpandableListParentClass<Object>> mParent;
private View view;
public ArrayList<Object> getMParent() {
return mParent;
}
public ExpandableListAdapter(Context context,
ArrayList<ExpandableListParentClass<Object>> parentList ) {
this.mParent = parentList;
this.inflater = LayoutInflater.from(context);
}
// counts the number of group/parent items so the list knows how many
// times calls getGroupView() method
public int getGroupCount() {
return mParent.size();
}
// counts the number of children items so the list knows how many times
// calls getChildView() method
public int getChildrenCount(int parentPosition) {
int size =0;
if(mParent.get(parentPosition).getParentChildren() != null){
size = mParent.get(parentPosition).getParentChildren().size();
}
return size;
}
// gets the title of each parent/group
public Object getGroup(int i) {
return mParent.get(i).getParent();
}
// gets the name of each item
public Object getChild(int parentPosition, int childPosition) {
return mParent.get(parentPosition).getParentChildren().get(childPosition);
}
public long getGroupId(int parentPosition) {
return parentPosition;
}
public long getChildId(int i, int childPosition) {
return childPosition;
}
public boolean hasStableIds() {
return true;
}
// in this method you must set the text to see the parent/group on the list
public View getGroupView(int parentPosition, boolean b, View view, ViewGroup viewGroup) {
if (view == null) {
view = inflater.inflate(R.layout.layout_listview, viewGroup, false);
}
return view;
}
// in this method you must set the text to see the children on the list
public View getChildView(int parentPosition, int childPosition, boolean b, View view, ViewGroup viewGroup) {
if (view == null) {
view = inflater.inflate(R.layout.layout_listview, viewGroup, false);
}
// return the entire view
return view;
}
public boolean isChildSelectable(int i, int i1) {
return true;
}
}
now fill to list
List<ExpandableListParentClass> arrayParents = new ArrayList<ExpandableListParentClass>();
ExpandableListParentClass item = new ExpandableListParentClass();
item.setParent(yourParentItem);
item.setParentChildren( yourChildList);
之后你需要添加孩子
ExpandableListView myExpList= (ExpandableListView) this.view.findViewById(R.id.yourExpListView);
ExpandableListAdapter adapter =
(ExpandableListAdapter) myExpList.getExpandableListAdapter();
( (ExpandableListParentClass)adapter.getMParent().get(0) ).getParentChildren().add(object);
//(change to get(0) which you parent want to get )
adapter.notifyDataSetChanged();
adapter.notifyDataSetInvalidated();