Android Open Source - ExpertAndroid Word Meaning List Adapter

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License

The source code is released under:

MIT License

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Java Source Code

package com.androidbook.parse;
//  w w w .  j a  va2s  .c  o  m
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

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

import com.parse.ParseUser;

//ArrayAdapter holds the data/rows in a list or array
//it passes this row object to getView with a position
public class WordMeaningListAdapter 
extends ArrayAdapter<WordMeaning>
implements View.OnClickListener
{

  private static String tag = "WordMeaningListAdapter";
  
  //String[] wordArray;
  Context ctx = null;
  LayoutInflater lif = null;
  IReportBack reportBack = null;
  
  public WordMeaningListAdapter(Context context, 
      List<WordMeaning> wordMeaningList,
      IReportBack inReportBack)
  {
        super(context
             ,R.layout.word_meaning_list_item_relative_layout
             ,R.id.wml_RowWordMeaningId
             ,wordMeaningList);
        ctx = context;
        lif = LayoutInflater.from(ctx);
        reportBack = inReportBack;
  }
  
  //This class saves references to the buttons that are displayed
  //for each row. if there are 10 rows then there are 10 buttons
  //and 10 instances of view holder
  static class ViewHolder
  {
    public ViewHolder(View rowView, View.OnClickListener ocl)
    {
      textView =
        (TextView)rowView.findViewById(R.id.wml_RowWordMeaningId);
      textView.setOnClickListener(ocl);
      contextView =
        (TextView)rowView.findViewById(R.id.wml_RowContextId);
    }
    
    //Holds the meaning line
    public TextView textView;
    //Model Object representing word meaning
    public WordMeaning wordMeaningAtThisRow;
    
    //should be user/date who created this meaning
    public TextView contextView;
  }

  //For a given position return a view
  @Override
  public View getView(int position, View convertView, ViewGroup parent) 
  {
    ViewHolder vh;
    View thisView;
    if (convertView == null)
    {
      //create the view
      View rowView =
        lif.inflate(R.layout.word_meaning_list_item_relative_layout,null);
      vh = new ViewHolder(rowView,this);
      rowView.setTag(vh);
      thisView = rowView;
    }
    else
    {
      //populate the view
      vh = (ViewHolder)convertView.getTag();
      thisView = convertView;
    }
    //got a view holder
    //and a view.
    
    WordMeaning curwordMeaning = this.getItem(position);
    vh.textView.setText(curwordMeaning.getMeaning());
    vh.contextView.setText(this.getContextFromWordMeaning(curwordMeaning));
    
    //Notice how we are placing the tags
    //in the respective buttons
    
    vh.wordMeaningAtThisRow = curwordMeaning;
    return thisView;
  }
  @Override
  public void onClick(View v) 
  {
  }
  
  private String getContextFromWordMeaning(WordMeaning m)
  {
    //who created it and when
    ParseUser pu = m.getCreatedBy();
    Date d = m.getCreatedAt();
    
    DateFormat df = SimpleDateFormat.getDateInstance(DateFormat.SHORT);
    String datestring =  df.format(d);
    
    return pu.getUsername() + "/" + datestring;
  }
}//eof-class

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