package com.lol.huixin.control;

import android.os.Bundle;
import android.util.Log;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.Context;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class BaseAdapterActivity extends Activity {
	private ListView listView;
	private List<Map<String,Object>> listMap;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_base_adapter);
		listView=(ListView)findViewById(R.id.listView);
		listMap=getData();
		MyAdapter adapter=new MyAdapter(getApplicationContext());
		listView.setAdapter(adapter);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.base_adapter, menu);
		return true;
	}

	private List<Map<String, Object>> getData() {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("title", "G1");
		map.put("info", "google 1");
		map.put("img", R.drawable.a1);
		list.add(map);
		
		map = new HashMap<String, Object>();
		map.put("title", "G2");
		map.put("info", "google 2");
		map.put("img", R.drawable.a2);
		list.add(map);
		
		map = new HashMap<String, Object>();
		map.put("title", "G3");
		map.put("info", "google 3");
		map.put("img", R.drawable.a3);
		list.add(map);
		
		return list;
	}
	
	public static class ViewHolder{
		public ImageView img;
		public TextView title;
		public TextView info;
		public Button viewBtn;
	}
	
	public class MyAdapter extends BaseAdapter{
		public LayoutInflater myInflater;

		public MyAdapter(Context context){
			////根据context上下文加载布局，这里的是getApplicationContext()本身，即this
			this.myInflater=LayoutInflater.from(context);
		}
		
		@Override
		public int getCount() {
			//在此适配器中所代表的数据集中的条目数
			return listMap.size();
		}

		@Override
		public Object getItem(int position) {
			//获取数据集中与指定索引对应的数据项
			return position;
		}

		@Override
		public long getItemId(int position) {
			//获取在列表中与指定索引对应的行id
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			ViewHolder holder=null;
			if(convertView==null){
				//如果缓存convertView为空，则需要创建View
				holder=new ViewHolder();
				//这句话很关键
				convertView=myInflater.inflate(R.layout.list_items, null);
				holder.img=(ImageView)convertView.findViewById(R.id.img);
				holder.title=(TextView)convertView.findViewById(R.id.title);
				holder.info=(TextView)convertView.findViewById(R.id.info);
				holder.viewBtn=(Button)convertView.findViewById(R.id.view_btn);
				//将设置好的布局保存到缓存中，并将其设置在Tag里，以便后面方便取出Tag
				convertView.setTag(holder);
			}else{
				holder=(ViewHolder)convertView.getTag();
			}
			Log.i("positon",String.valueOf(position)+"\t"+listMap.get(position).get("title"));
			holder.img.setBackgroundResource((Integer)listMap.get(position).get("img"));
			holder.title.setText((String)listMap.get(position).get("title"));
			holder.info.setText((String)listMap.get(position).get("info"));
			holder.viewBtn.setOnClickListener(new View.OnClickListener() {
				@Override
				public void onClick(View v) {
					showInfo();                
				}
			});
			return convertView;
		}
	}
	
	/**
	* listview中点击按键弹出对话框
	*/
	public void showInfo(){
		new AlertDialog.Builder(this).setTitle("我的listview").setMessage("介绍...").setPositiveButton("确定", new DialogInterface.OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {}
		}).show();
	}
	
	
}