将来自可扩展列表子项的选定列表项的字符串放入对话框中

Question

我一直在尝试从我的 strings.xml 中提取 selected 项目的详细信息。当我 select 我的可扩展列表视图（子视图）中的一个项目时弹出一个对话框。遗憾的是收效甚微。

这是我的 NavigationDrawerFragment 中的可扩展列表片段。一切都很好。对话框弹出模板文本。

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;

我的可扩展列表视图列表

        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

}

我的适配器：

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

尤里卡我想通了！

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

将来自可扩展列表子项的选定列表项的字符串放入对话框中

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

android

dialog

expandablelistview