Put a string into a dialog from a slected list item from a expandable list child

Question

I've been trying to pull details of an item selected, from my strings.xml. To a dialog pop up when i select an item from my expandable list view (child). Sadly with little success.

This is the expandable list fragment from my NavigationDrawerFragment. everything works great. the dialog pulls up with the template text.

case 2:
    rootView = inflater.inflate(R.layout.fragment_item_list, container, false);

    // get the listview
    expListView = (ExpandableListView) rootView.findViewById(R.id.lvExp);
    // preparing list data
    prepareListData();
    listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
    // setting list adapter
    expListView.setAdapter(listAdapter);

    // Listview on child click listener
    expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
        @Override
        public boolean onChildClick(ExpandableListView parent, View v,
                                    int groupPosition, int childPosition, long id) {

            // custom dialog
            final Dialog dialog = new Dialog(getActivity());
            dialog.setContentView(R.layout.custom);
            dialog.setTitle("Spell Details");

            // set the custom dialog components - text, image and button
               TextView text = (TextView) dialog.findViewById(R.id.text);
               String content = istDataChild.get(childPosition).toString();
               text.setText(content);
//          ImageView image = (ImageView) dialog.findViewById(R.id.image);
//          image.setImageResource(R.drawable.ic_launcher);

            Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
            // if button is clicked, close the custom dialog
            dialogButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    dialog.dismiss();
                }
            });

            dialog.show();
            return false;
        }
    });
    break;

My list for the expandable list view

        private void prepareListData() {
            listDataHeader = new ArrayList<>();
            listDataChild = new HashMap<>();

            // Adding child data
            listDataHeader.add("Air");

            // Adding child data
            List<String> Air = new ArrayList<String>();
            Air.add("Air Jet\n"+"Ref. Magic 24");

            listDataChild.put(listDataHeader.get(0), Air); // Header, Child data

}

And my adapter:

import java.util.HashMap;
import java.util.List;
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

public class ExpandableListAdapter extends BaseExpandableListAdapter {

    private MainActivity.PlaceholderFragment _context;
    private List<String> _listDataHeader; // header titles
    // child data in format of header title, child title
    private HashMap<String, List<String>> _listDataChild;

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

    @Override
    public Object getChild(int groupPosition, int childPosititon) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .get(childPosititon);
    }

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

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

        final String childText = (String) getChild(groupPosition, childPosition);

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

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

        txtListChild.setText(childText);
        return convertView;

    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return this._listDataHeader.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return this._listDataHeader.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        String headerTitle = (String) getGroup(groupPosition);

        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getActivity().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;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }
}

Answer 1

Eureka i have figured it out!

TextView text = (TextView) dialog.findViewById(R.id.text);
String str = (String) parent.getItemAtPosition(childPosition +1);
text.setText(str);