CourseDetailAboutAdapter.java

package com.hyrt.cei.ui.phonestudy.adapter;

import java.util.HashMap;
import java.util.List;

import com.hyrt.cei.R;
import com.hyrt.cei.application.CeiApplication;
import com.hyrt.cei.util.AsyncImageLoader;
import com.hyrt.cei.vo.Courseware;
import com.hyrt.cei.vo.ImageResourse;

import android.app.Activity;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class CourseDetailAboutAdapter extends BaseAdapter {

	private List<Courseware> coursewares;
	private LayoutInflater inflater;
	private AsyncImageLoader asyncImageLoader;
	private GridView gv;

	public CourseDetailAboutAdapter(Activity activity,
			List<Courseware> coursewares, GridView gv) {
		this.coursewares = coursewares;
		this.gv = gv;
		inflater = (LayoutInflater) activity
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		asyncImageLoader = ((CeiApplication) (activity.getApplication())).asyncImageLoader;
	}

	@Override
	public int getCount() {
		return coursewares.size();
	}

	@Override
	public Object getItem(int position) {
		return coursewares.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ViewHolder holder = null;
		if (convertView == null) {
			holder = new ViewHolder();
			convertView = inflater.inflate(
					R.layout.phone_studydetail_gridview_item, null);
			holder.classIcon = (ImageView) ((LinearLayout) convertView)
					.getChildAt(0);
			holder.title = (TextView) ((LinearLayout) convertView)
					.getChildAt(1);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		String imageUrl = coursewares.get(position).getSmallPath();
		holder.classIcon.setTag(imageUrl);
		holder.title.setText("第"+ coursewares.get(position).getClassLevel()+"集");
		ImageResourse imageResource = new ImageResourse();
		imageResource.setIconUrl(imageUrl);
		imageResource.setIconId(coursewares.get(position).getClassId());
		asyncImageLoader.loadDrawable(imageResource,
				new AsyncImageLoader.ImageCallback() {

					@Override
					public void imageLoaded(Drawable drawable, String path) {
						ImageView imageView = (ImageView) gv
								.findViewWithTag(path);
						if (drawable != null && imageView != null) {
							imageView.setImageDrawable(drawable);
						}
					}
				});
		return convertView;
	}

	class ViewHolder {
		ImageView classIcon;
		TextView title;
	}

}