Android ListView顯示倒計時的流暢實現

有人在群裡問他實現的倒計時在ListView中很卡，有沒有好的方案，我就閒來沒事，實現了一下，供參考

package com.microchange;

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

import com.microchange.view.TimeView;
import com.microchange.view.application.MyApplication;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class MainActivity extends ListActivity {

	public static List> list;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		Map map = null;
		list = new ArrayList>();
		for (int i = 1; i < 50; i++) {
			map = new HashMap();
			map.put("name","秒殺產品"+i);
			map.put("time",String.valueOf(10*i));
			list.add(map);
		}
		MyApplication.set(list);
		// 數據拿到開始計時
		setListAdapter(new MyAdapter());
		start();
		
	}
	
	class MyAdapter extends BaseAdapter{
		
		@Override
		public int getCount() {
			return list.size();
		}

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

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

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			ViewHolder viewHolder;
			if(convertView == null){
				convertView = View.inflate(getApplicationContext(), R.layout.fragment_main, null);
				viewHolder = new ViewHolder();
				viewHolder.name = (TextView) convertView.findViewById(R.id.name);
				viewHolder.time = (TimeView) convertView.findViewById(R.id.time);
				convertView.setTag(viewHolder);
			}else{
				viewHolder = (ViewHolder) convertView.getTag();
			}
			viewHolder.name.setText(list.get(position).get("name"));;
			viewHolder.time.setText(list.get(position).get("time"));;
			viewHolder.time.setPosition(position);
			return convertView;
		}
		
	}
	
	
	class ViewHolder{
		TextView name;
		TimeView time;
	}

	int result =0;
	private Thread thread;
	public void start(){
		thread = new  Thread(){
			public void run() {
				while(true){
					try {
						if ( list ==null || result == list.size()){
							break;
						}
						sleep(1000);
						for(Map map :list){
							if(!"售罄".equals(map.get("time"))){
								if("1".equals(map.get("time"))){
									map.put("time", "售罄");
									result++;
								}else{
									map.put("time", ""+(Integer.parseInt(map.get("time"))-1));
								}
							}
						}
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
				}
			};
		};
		thread.start();
	}
	
	@Override
	protected void onDestroy() {
		MyApplication.removeAll();
		list = null;
		super.onDestroy();
	}
}

/**
 * 
 */
package com.microchange.view;

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

import com.microchange.MainActivity;
import com.microchange.view.application.MyApplication;

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.TextView;

/**
 * 描述: TimeView
 * 
 * @author 吳傳龍 Email:[email protected] QQ: 3026862225
 * @version 創建時間: 2015年3月17日 上午10:15:51
 * @version 最後修改時間:2015年3月17日 上午10:15:51 修改人:吳傳龍
 */
public class TimeView extends TextView implements Runnable {

	private int position;

	/**
	 * @param context
	 * @param attrs
	 * @param defStyle
	 */
	public TimeView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		postDelayed(this, 1000);
	}

	public void setPosition(int position) {
		this.position = position;
	}

	@Override
	public void run() {
		String time= MyApplication.get(position, "time");
		setText(time);
		if(!"售罄".equals(time)){
			postDelayed(this, 1000);
		}
	}

	public TimeView(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public TimeView(Context context) {
		this(context, null);
	}
}

/**
 * 
 */
package com.microchange.view.application;

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

import android.app.Application;

/**
 * 描述: MyApplication
 * 
 * @author 吳傳龍 Email:[email protected] QQ: 3026862225
 * @version 創建時間: 2015年3月17日 下午2:45:06
 * @version 最後修改時間:2015年3月17日 下午2:45:06 修改人:吳傳龍
 */
public class MyApplication extends Application {
	private static List> list;

	@Override
	public void onCreate() {
		super.onCreate();
	}

	public static void set(List> l) {
		list = l;
	}

	public static String get(int position, String key) {
		return list.get(position).get(key);
	}
	
	public static void removeAll(){
		if (list!=null)
			list.clear();
		list = null;
	}
	
}