Android Open Source - adamsonelearn Today List Adapter

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License

The source code is released under:
MIT License
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Java Source Code

package com.jaselogic.adamsonelearn;
//ww w . ja  v a 2  s .co  m
import java.util.ArrayList;

import android.content.Context;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class TodayListAdapter extends BaseAdapter {
  private ArrayList<TodayListItem> mListItems;
  private LayoutInflater mLayoutInflater;
  
  public TodayListAdapter(Context context, ArrayList<TodayListItem> arrayList) {
    mListItems = arrayList;
    mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  }
  
    @Override
    public int getItemViewType(int position) {
      // TODO Auto-generated method stub
      //return mListItems.get(position).viewType;
      //return 0;
      return mListItems.get(position).viewType.ordinal();
    }
    
    @Override
    public int getViewTypeCount() {
      return 4;
    }
    
    
    @Override
    public int getCount() {
        //getCount() represents how many items are in the list
        return mListItems.size();
    }
 
    @Override
    //get the data of an item from a specific position
    //i represents the position of the item in the list
    public Object getItem(int i) {
        return null;
    }
 
    @Override
    //get the position id of the item from the list
    public long getItemId(int i) {
        return 0;
    }
    
    @Override
    public View getView(int position, View view, ViewGroup viewGroup) {
 
        // create a ViewHolder reference
        ViewHolder holder;
        //get the string item from the position "position" from array list to put it on the TextView
        final TodayListItem listItem = mListItems.get(position);
        
        //check to see if the reused view is null or not, if is not null then reuse it
        if (view == null) {
            holder = new ViewHolder();
            switch(listItem.viewType) {
              case ITEM_TITLE:
                view = mLayoutInflater.inflate(R.layout.today_item_title, viewGroup, false);
                holder.mainText = (TextView) view.findViewById(R.id.today_title_text);
                break;
              case ITEM_NOW:
                view = mLayoutInflater.inflate(R.layout.today_item_now, viewGroup, false);
                holder.mainText = (TextView) view.findViewById(R.id.today_now_maintext);
                holder.timeText = (TextView) view.findViewById(R.id.today_now_timetext);
                holder.roomText = (TextView) view.findViewById(R.id.today_now_roomtext);
                holder.reminderText = (TextView) view.findViewById(R.id.today_now_reminders);
                break;
              case ITEM_NEXT:
                view = mLayoutInflater.inflate(R.layout.today_item_next, viewGroup, false);
                holder.mainText = (TextView) view.findViewById(R.id.today_next_maintext);
                holder.timeText = (TextView) view.findViewById(R.id.today_next_timetext);
                holder.roomText = (TextView) view.findViewById(R.id.today_next_roomtext);
                holder.reminderText = (TextView) view.findViewById(R.id.today_next_reminders);
                break;
              case ITEM_LATER:
                view = mLayoutInflater.inflate(R.layout.today_item_later, viewGroup, false);
                holder.mainText = (TextView) view.findViewById(R.id.today_later_maintext);
                holder.timeText = (TextView) view.findViewById(R.id.today_later_timetext);
                holder.roomText = (TextView) view.findViewById(R.id.today_later_roomtext);
                holder.reminderText = (TextView) view.findViewById(R.id.today_later_reminders);
                break;
            }
            
            // the setTag is used to store the data within this view
            view.setTag(holder);
        } else {
            // the getTag returns the viewHolder object set as a tag to the view
            holder = (ViewHolder)view.getTag();
        }
 
        if (listItem != null) {
          //TODO: might want to check if each is null.
            holder.mainText.setText(listItem.mainText);
            switch(listItem.viewType) {
            case ITEM_TITLE:
              break;
            case ITEM_NOW:
            case ITEM_NEXT:
            case ITEM_LATER:
              holder.timeText.setText(listItem.timeText);
              holder.roomText.setText(listItem.roomText);
              holder.reminderText.setText(Html.fromHtml(listItem.reminderText));
              break;
            }
        }
 
        //this method must return the view corresponding to the data at the specified position.
        return view;
 
    }
    
  //static class view holder to prevent repeated calls to findViewById
  private static class ViewHolder {
    protected TextView mainText;
    protected TextView timeText;
    protected TextView roomText;
    protected TextView reminderText;
  }
  
  public static class TodayListItem {
    public String mainText;
    public String timeText;
    public String roomText;
    public String reminderText;
    public ItemType viewType;
  }
  
  public enum ItemType {
    ITEM_NOW,
    ITEM_NEXT,
    ITEM_LATER,
    ITEM_TITLE
  }
}
Java Source Code List
