Apps cannot read value from a custom expandable list view

[mwhubham]

I have a arraylist for generic multilevel expandable view.

package com.example.generic;

import java.util.ArrayList;

public class Category {
        ArrayList<Category> childs;
        private String name;
     
        /*Constructor 1*/
        public Category(String name) {
                this.name = name;
                childs = new ArrayList<Category>(0);
        }
       
        /*Constructor 2*/
        public Category(String name, ArrayList<Category> childs) {
                this.name = name;
                this.childs = childs;
        }
      
        public String getName() {
              return "";
        }
}

and a custom adapter with overrided method

package com.example.generic;

import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.TextView;
public class CatAdapter extends BaseExpandableListAdapter {
        private Context context;
        private LayoutInflater inflater;
        private ArrayList<Category> categories;
      
        public CatAdapter(Context context, ArrayList<Category> categories) {
                this.context = context;
                inflater = LayoutInflater.from(context);
                this.categories = categories;
        }
      
        @Override
        public Object getChild(int groupPosition, int childPosition) {
                return categories.get(groupPosition).childs.get(childPosition);
               
                        }
        @Override
        public long getChildId(int groupPosition, int childPosition) {
                return childPosition;
        }
        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
              
                convertView = inflater.inflate(R.layout.catitem, parent, false);
                TextView textView_catName = (TextView)convertView.findViewById(R.id.textView_catName);
                Category current = categories.get(groupPosition).childs.get(childPosition);
               
                textView_catName.setText(groupPosition + " , " + childPosition);
               
                String value="";
               
//                textView_catName.setText(value);
               
               
                if(current.childs.size() > 0 ) {
                        ExpandableListView elv = new ExpandableListView(context);
                        elv.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.WRAP_CONTENT,  AbsListView.LayoutParams.WRAP_CONTENT));
                        elv.setAdapter(new CatAdapter(context, current.childs));
                        ((ViewGroup)convertView).addView(elv);
                }
              
                return convertView;
        }
        @Override
        public int getChildrenCount(int groupPosition) {
                return categories.get(groupPosition).childs.size();
        }
        @Override
        public Object getGroup(int groupPosition) {
                return categories.get(groupPosition);
        }
        @Override
        public int getGroupCount() {
                return categories.size();
        }
        @Override
        public long getGroupId(int groupPosition) {
                return groupPosition;
        }
        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
                convertView = inflater.inflate(R.layout.catitem, parent, false);
                TextView textView_catName = (TextView)convertView.findViewById(R.id.textView_catName);
                Category current = categories.get(groupPosition);
//               
//                categories.get(groupPosition, parent);
//                textView_catName.setText(grpValue);
//               
               
                textView_catName.setText("" + groupPosition);
                return convertView;
        }
        @Override
        public boolean hasStableIds() {
                return false;
        }
        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
                return false;
        }
}

but the problem is that it does not read properly. how to override them for n level expandable list view.
another problem is how to access value from arraylist on the basis of child and group.

 

[Hadron]

You definitely should be asking this in the Application Development section. See the sticky in this forum: http://androidforums.com/threads/developers-please-read-this-before-posting-in-here.904569/

I'll move the thread over there.