Is It Possible To Change The Childposition Id Of The Expandablelistview?

just want to know if it is possible to change the childPosition id of the expandablelistview? because i want to change the childPosition id to my category id.. this is my DataChild

Solution 1:

First you need to create a Model class (lets say Category), that contains the name and the id:

publicclassCategory{
    publicString name;
    publicString id;
}

Then load a list of Category object from your json:

List<Category> CATEGORY = newArrayList<Category>();
for(int i=0;i<categories.length();i++){
     JSONObjectc= categories.getJSONObject(i);
     Categorycategory=newCategory();
     category.name = c.getString(TAG_NAME);
     category.id = c.getString(TAG_ID);

     CATEGORY.add(category);
 }

Finally pass a HashMap<String, List<Category>> as parameter in your adapter instead of HashMap<String, List<String>>. And change your adapter methods to support Category object instead of String.

So when you call getChild() method, it will return a Category object where you can find the name and the id (Category.name , Category.id)

Update

Change your adapter class to:

publicclassExpandableListAdapterextendsBaseExpandableListAdapter{

    private Context _context;
    private List<String> _listDataHeader; // header titles// child data in format of header title, child titleprivate HashMap<String, List<Category>> _listDataChild;

    public ExpandableListAdapter(Context context, List<String> listDataHeader,
                                 HashMap<String, List<Category>> listChildData) {
        this._context = context;
        this._listDataHeader = listDataHeader;
        this._listDataChild = listChildData;
    }

    @Overridepublic Category getChild(int groupPosition, int childPosititon) {
        returnthis._listDataChild.get(this._listDataHeader.get(groupPosition))
                .get(childPosititon);
    }

    @Overridepublic long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Overridepublic View getChildView(int groupPosition, final int childPosition,
                             boolean isLastChild, View convertView, ViewGroup parent) {

        final Category childCategory = (Category) getChild(groupPosition, childPosition);

        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_item, null);
        }

        TextView txtListChild = (TextView) convertView
                .findViewById(R.id.lblListItem);

        txtListChild.setText(childCategory.name);
        return convertView;
    }

    @Overridepublic int getChildrenCount(int groupPosition) {
        returnthis._listDataChild.get(this._listDataHeader.get(groupPosition))
                .size();
    }

    @Overridepublic Object getGroup(int groupPosition) {
        returnthis._listDataHeader.get(groupPosition);
    }

    @Overridepublic int getGroupCount() {
        returnthis._listDataHeader.size();
    }

    @Overridepublic long getGroupId(int groupPosition) {
        return groupPosition;
    }

    @Overridepublic View getGroupView(int groupPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        String headerTitle = (String) getGroup(groupPosition);
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_group, null);
        }

        TextView lblListHeader = (TextView) convertView
                .findViewById(R.id.lblListHeader);
        lblListHeader.setTypeface(null, Typeface.BOLD);
        lblListHeader.setText(headerTitle);

        return convertView;
    }

    @Overridepublic boolean hasStableIds() {
        returnfalse;
    }

    @Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {
        returntrue;
    }
}

And in your click listener:

expListView.setOnChildClickListener(newExpandableListView.OnChildClickListener() {

   @OverridepublicbooleanonChildClick(ExpandableListView parent, View v,
                                                int groupPosition, int childPosition, long id) {
          // TODO Auto-generated method stubStringheader= listDataHeader.get(groupPosition);
            Categorychild= listDataChild.get(header).get(childPosition);

            // child.name to get the name// child.id to get the id
           Toast.makeText(getActivity(),"ChildNme: "+child.name+" ChildId: "+child.id, Toast.LENGTH_SHORT).show();
            returnfalse;
          }
   });