Android Open Source - CakeUI Cake Expandable List View Adapter

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.cakeui.generic.adapter;
//from   w  ww .j  av a  2s. c  o m
import java.util.List;

import com.cakeui.R;
import com.cakeui.utils.CakeMap;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

/**
 * 
 * @author Mariana Azevedo
 * @email mariana@bsi.ufla.br
 * 
 * 
 * Class that implements a generic ExpandableListView Adapter.
 *
 */

public class CakeExpandableListViewAdapter<T> extends BaseExpandableListAdapter{

  private Context context;
  private CakeMap<T, List<T>> expandableListViewItems;
  
  public CakeExpandableListViewAdapter(Context context, CakeMap<T, List<T>> expandableListViewItems){
    this.context = context;
    this.expandableListViewItems = expandableListViewItems;
    
  }
    
  @Override
  public Object getChild(int groupPosition, int childPosition) {
    return expandableListViewItems.getEntryFromIndex(groupPosition).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) {
    
    View row = convertView;
    
    ViewHolder viewHolder;
    
    if (row == null){
      
      LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      row = inflater.inflate(R.layout.activity_expandable_listview_child, parent, false);
      
      viewHolder = new ViewHolder();
      
      viewHolder.childItemsContentTextView = (TextView) row.findViewById(R.id.expandableListView_child);
      row.setTag(viewHolder);
      
      }else{
        viewHolder = (ViewHolder) row.getTag();
      }
    
    viewHolder.childItemsContentTextView.setText
      (expandableListViewItems.getEntryFromIndex(groupPosition).get(childPosition).toString());
    
    return row;
  }

  @Override
  public int getChildrenCount(int groupPosition) {
    return expandableListViewItems.getEntryFromIndex(groupPosition).size();
  }

  @Override
  public Object getGroup(int groupPosition) {
    return expandableListViewItems.getKeyFromIndex(groupPosition);
  }

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

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

  @Override
  public View getGroupView(int groupPosition, boolean isExpanded,
      View convertView, ViewGroup parent) {
    
    ViewHolder viewHolder;
    
    if (convertView == null){
      
      LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      convertView = inflater.inflate(R.layout.activity_expandable_listview_group, parent, false);
      
      viewHolder = new ViewHolder();
      
      viewHolder.groupItemsContentTextView = (TextView) convertView.findViewById(R.id.expandableListView_group);
      convertView.setTag(viewHolder);
      
    }else{
      viewHolder = (ViewHolder) convertView.getTag();
    }
    
    T object = (T) expandableListViewItems.getKeyFromIndex(groupPosition);
    
    viewHolder.groupItemsContentTextView.setText(object != null? object.toString(): "");
    
    return convertView;
  }

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

  @Override
  public boolean isChildSelectable(int groupPosition, int childPosition) {
    return false;
  }
  
  static class ViewHolder{
    TextView groupItemsContentTextView;
    TextView childItemsContentTextView;
  }

}
Java Source Code List
