Tab1_Music_DetailListAdapter.java

package com.joyplus.joylink.Adapters;

import java.io.File;
import java.text.DecimalFormat;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;

import com.androidquery.AQuery;
import com.joyplus.joylink.R;
import com.joyplus.joylink.Utils.JoylinkUtils;

/*
 * 分类导航详情的数据适配器
 * */
public class Tab1_Music_DetailListAdapter extends ArrayAdapter {

	// listview的数据
	private Map viewMap;
	private AQuery aq;


	// 构造函数
	public Tab1_Music_DetailListAdapter(Activity activity, List list) {
		super(activity, 0, list);

		viewMap = new HashMap();
	}

	// 获取显示当前的view
	public View getView(int i, View view, ViewGroup viewgroup) {
		Integer integer = Integer.valueOf(i);
		View view1 = (View) viewMap.get(integer);

		if (view1 == null) {
			// 加载布局文件
			view1 = ((Activity) getContext()).getLayoutInflater().inflate(
					R.layout.tab1_music_file_detail_list, null);
			aq = new AQuery(view1);

			// 获取当前数据项的数据
			Tab1_Music_ListData m_Tab3ListData = (Tab1_Music_ListData) getItem(i);
			
			if (m_Tab3ListData.album_art != null) {
				File file = new File(m_Tab3ListData.album_art);
				if (file.exists()) {
					aq.id(R.id.imageView1).image(file, 114);
				}
			}
			aq.id(R.id.txt_video_caption).text(m_Tab3ListData.title);
			aq.id(R.id.textView1).text(
					JoylinkUtils.formatDuration(m_Tab3ListData.duration));

			if (aq != null)
				aq.dismiss();
			Integer integer1 = Integer.valueOf(i);
			Object obj = viewMap.put(integer1, view1);
		}
		return view1;
	}

	private String getSizeString(int size) {
		float G = (float) size / (1024 * 1024 * 1024);
		float M = (float) size / (1024 * 1024);
		float K = (float) size / 1024;
		DecimalFormat df = new DecimalFormat("00.00");
		String sizeValue;
		if (G < 1) {
			if (M < 1)
				sizeValue = df.format(K) + "M";
			else
				sizeValue = df.format(M) + "K";
		} else
			sizeValue = df.format(G) + "G";

		return sizeValue;

	}
}