自定义Adapter写法记录

最新推荐文章于 2025-12-01 13:49:36 发布

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#移动开发 #java

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本文介绍了一个自定义的Android视屏列表适配器的具体实现方法。该适配器使用BaseAdapter并结合LayoutInflater来填充视屏信息，包括缩略图、视屏名称及大小等属性。

package com.example.coolvidaoplayer;

import java.util.List;
import java.util.Map;

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

public class VidaoListAdapter extends BaseAdapter {
	private LayoutInflater videoListInflater;
	private List<Map<String,Object>>videoList;
	public VidaoListAdapter(Context context,List<Map<String,Object>>list)
	{
		this.videoListInflater=LayoutInflater.from(context);
		this.videoList=list;
	}
	static class ViewHolder{
		ImageView ivVideoThumbnail;
		TextView tvVideoName;
		TextView tvVideoSize;
	}

	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		if(videoList!=null)
		{
			return videoList.size();
		}else
		return 0;
	}

	@Override
	public Object getItem(int pos) {
		// TODO Auto-generated method stub
		return videoList.get(pos);
	}

	@Override
	public long getItemId(int id) {
		// TODO Auto-generated method stub
		return id;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ViewHolder videoHolder=null;
		if(convertView==null)
		{
			videoHolder=new ViewHolder();
			convertView=videoListInflater.inflate(R.layout.list_item_vidaoinfo, null);
			videoHolder.ivVideoThumbnail=(ImageView)convertView.findViewById(R.id.iv_vidao_thumbnail);
			videoHolder.tvVideoName=(TextView)convertView.findViewById(R.id.tv_vidao_name);
			videoHolder.tvVideoSize=(TextView)convertView.findViewById(R.id.tv_vidao_size);
			videoHolder.ivVideoThumbnail.setBackgroundResource((Integer)videoList.get(position).get("videothumbnail"));
			videoHolder.tvVideoName.setText((String)videoList.get(position).get("videoname"));
			videoHolder.tvVideoSize.setText((String)videoList.get(position).get("videosize"));
			convertView.setTag(videoHolder);
		}
		else
		{
			videoHolder=(ViewHolder)convertView.getTag();
		}
		
		return convertView;

	}

}