Android开发 ListAdapter实现_安卓开发 listadapter-优快云博客

本文链接：https://blog.youkuaiyun.com/w575822446/article/details/12836555

本文介绍如何在Android开发中使用FoodDateAdapter扩展BaseAdapter，实现ListView的数据绑定。通过构造函数初始化食物列表和界面资源，利用LayoutInflater填充布局，并在getView方法中设置数据到历史记录的日期和计算值文本视图。

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package com.jinbi.app.adapter;

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.TextView;

import com.jinbi.R;

public class FoodDateAdapter extends BaseAdapter {
	private List<Map<String,Object>> foods = null;//在绑定的数据
	private int resource = 0;         //绑定条目界面
	private LayoutInflater inflater; //布局填充器
	
	public FoodDateAdapter(Context context,List<Map<String,Object>> foods,int resource){
		this.foods = foods;
		this.resource = resource;
		inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); //取得布局填充服务
	}
	
	//得到数据的总数
	@Override
	public int getCount() {
		return foods.size();
	}

	//取得对应的索引对象
	@Override
	public Object getItem(int position) {
		return foods.get(position);
	}

	
	//得到条目的Id
	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		if (convertView == null) {
			convertView = inflater.inflate(resource, null);
		}
		TextView histroyTime = (TextView)convertView.findViewById(R.id.histroy_item_time);
		TextView histroyCalculate = (TextView)convertView.findViewById(R.id.histroy_item_calculate);
//		ImageView histroyIcon = (ImageView)convertView.findViewById(R.id.histroy_item_icon);
		
		//实现数据绑定
		Map<String,Object> food = foods.get(position);
		histroyTime.setText((String)food.get("date"));
		histroyTime.setTag((String)food.get("id"));
		histroyCalculate.setText("-"+(String)food.get("gole"));
		return convertView;
	}

}