Android Open Source - ExpertAndroid Word List Activity

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License

The source code is released under:

MIT License

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Java Source Code

package com.androidbook.parse;
/*from   w  w  w  .j av  a 2 s .  c  o  m*/
import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.TextView;

import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;

public class WordListActivity 
extends BaseListActivity
{
    public WordListActivity() {
    super("WordListActivity");
  }
  @Override     
    protected void onCreate(Bundle savedInstanceState)
    {         
      super.onCreate(savedInstanceState);
      
      //this.setListAdapter(getAdapter());
      ListView lv = this.getListView();
      setInitialView(lv);
      lv.setItemsCanFocus(true);
      this.populateWordList();
      
    }
    private void setInitialView(ListView lv)
    {
      View beginView = this.getEmptyBeginView();
      beginView.setVisibility(View.GONE);
        ((ViewGroup)(lv.getParent())).addView(beginView);
        lv.setEmptyView(beginView);      
    }
    private void setErrorView(String errorMessage)
    {
      TextView emptyView = 
        (TextView)findViewById(R.id.EmptyWordListTextViewId);
      emptyView.setText(errorMessage);
    }
    private void populateWordList()
    {
      ParseQuery query = new ParseQuery(Word.t_tablename);
      query.orderByDescending(Word.f_createdAt);
      query.include(Word.f_createdBy);
      
      query.setCachePolicy(ParseQuery.CachePolicy.CACHE_ELSE_NETWORK);
      query.setMaxCacheAge(100000L);
      
      this.turnOnProgressDialog("Going to get words", "Patience. Be Right back");
      query.findInBackground(new FindCallback() {
        public void done(List<ParseObject> objects, ParseException e) {
        turnOffProgressDialog();
          if (e == null) {
              // The query was successful.
            successfulQuery(objects);
          } else {
              // Something went wrong.
            queryFailure(e);
          }
        }
      });      
    }
    private void successfulQuery(List<ParseObject> objects)
    {
      ArrayList<Word> wordList = new ArrayList<Word>();
      for(ParseObject po: objects)
      {
        Word puw = new Word(po);
        wordList.add(puw);
      }
      
      WordListAdapter listItemAdapter = 
       new WordListAdapter(this
               ,wordList
               ,this);
      this.setListAdapter(listItemAdapter);
    }
    private void queryFailure(ParseException x)
    {
      this.setErrorView(x.getMessage());
    }
    
    private View getEmptyBeginView()
    {
       LayoutInflater lif = LayoutInflater.from(this);
       View v = lif.inflate(R.layout.list_empty_begin_layout, null);
       return v;
    }    
}//eof-class

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