NanyanNewsListViewAdapter.java

package com.bdyjy.adapter;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Map;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.bdyjy.R;
import com.bdyjy.util.PropetiesFileReaderUtil;

/**
 * ����Ҫ�����ŵ�adapter
 * 
 * @author �ܺ�<br/>
 *         create at 2016-4-28 ����11:31:52
 */
public class NanyanNewsListViewAdapter extends BaseAdapter
{
	private Context context; // ����������

	private List<Map<String, Object>> listItems; // ������Ϣ����
	private LayoutInflater listContainer; // ��ͼ����
	private ListView lv;

	public final class ListItemViewHolder
	{ // �Զ���ؼ�����
		public com.loopj.android.image.SmartImageView image;
		public TextView title;
		public TextView tv_news_id;
		public TextView tv_sourcefrom;
		public TextView tv_date;
	}

	public NanyanNewsListViewAdapter(Context context,
			List<Map<String, Object>> listItems, ListView lv)
	{
		this.context = context;
		listContainer = LayoutInflater.from(context); // ������ͼ����������������
		this.listItems = listItems;
		this.lv = lv;
	}

	public int getCount()
	{
		return listItems.size();
	}

	public Object getItem(int arg0)
	{
		return null;
	}

	public long getItemId(int arg0)
	{
		return 0;
	}

	/**
	 * ListView Item����
	 */
	public View getView(int position, View convertView, ViewGroup parent)
	{
		// TODO Auto-generated method stub
//		Log.e("method", "getView");
		final int selectID = position;
		// �Զ�����ͼ
		ListItemViewHolder listItemViewHolder = null;
		if (convertView == null)
		{
			listItemViewHolder = new ListItemViewHolder();
			// ��ȡlist_item�����ļ�����ͼ
			convertView = listContainer.inflate(R.layout.list_item, null);
			// ��ȡ�ؼ�����
			listItemViewHolder.image = (com.loopj.android.image.SmartImageView) convertView
					.findViewById(R.id.imageItem);
			listItemViewHolder.title = (TextView) convertView
					.findViewById(R.id.titleItem);
			listItemViewHolder.tv_news_id = (TextView) convertView
					.findViewById(R.id.tv_news_id);
			listItemViewHolder.tv_date = (TextView) convertView
					.findViewById(R.id.tv_date);
			listItemViewHolder.tv_sourcefrom = (TextView) convertView
					.findViewById(R.id.tv_sourcefrom);
			// ���ÿؼ�����convertView
			convertView.setTag(listItemViewHolder);
		} else
		{
			listItemViewHolder = (ListItemViewHolder) convertView.getTag();
		}

		// �������ֺ�ͼƬ
		String thumb = (String) listItems.get(position).get("thumb");
		// ���ͼƬthumbΪ�ա��Ͳ���ʾͼƬlayout
		if (TextUtils.isEmpty(thumb))
		{
			listItemViewHolder.image.setVisibility(View.INVISIBLE);
//			listItemViewHolder.image.setImageResource(R.drawable.default_image);
		} else
		{
//			System.out.println("����Ҫ��ʾͼƬ:"+thumb);
			listItemViewHolder.image.setImageUrl(thumb, R.drawable.default_image);
		}

		listItemViewHolder.title.setText((String) listItems.get(position).get(
				"title"));
		listItemViewHolder.tv_news_id.setText((String) listItems.get(position)
				.get("news_id"));
		listItemViewHolder.tv_sourcefrom.setText((String) listItems.get(
				position).get("sourcefrom"));
		listItemViewHolder.tv_date.setText((String) listItems.get(position)
				.get("date"));

		return convertView;
	}

	public void refresh(List<Map<String, Object>> listItems)
	{
		// ����this.listItems
		for (Map<String, Object> map : this.listItems)
		{
			System.out.println("map:" + map);
		}

		notifyDataSetChanged();
	}

	public Bitmap returnBitMap(String url)
	{
		URL myFileUrl = null;
		Bitmap bitmap = null;
		try
		{
			myFileUrl = new URL(url);
		} catch (MalformedURLException e)
		{
			e.printStackTrace();
		}
		try
		{
			HttpURLConnection conn = (HttpURLConnection) myFileUrl
					.openConnection();
			conn.setDoInput(true);
			conn.connect();
			InputStream is = conn.getInputStream();
			bitmap = BitmapFactory.decodeStream(is);
			is.close();

		} catch (IOException e)
		{
			e.printStackTrace();
		}
		return bitmap;
	}
}