Android实现淘宝客户端倒计时界面

/* 
 * Copyright (c) 2014, 青岛司通科技有限公司 All rights reserved. 
 * File Name：RushBuyCountDownTimerView.java 
 * Version：V1.0 
 * Author：zhaokaiqiang 
 * Date：2014-9-26 
 */ 
package com.qust.widght; 
 
import java.util.Timer; 
import java.util.TimerTask; 
 
import android.annotation.SuppressLint; 
import android.content.Context; 
import android.os.Handler; 
import android.os.Message; 
import android.util.AttributeSet; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import android.widget.Toast; 
 
import com.qust.rushbuycountdowntimerview.R; 
 
@SuppressLint("HandlerLeak") 
public class RushBuyCountDownTimerView extends LinearLayout { 
 
  // 小时，十位 
  private TextView tv_hour_decade; 
  // 小时，个位 
  private TextView tv_hour_unit; 
  // 分钟，十位 
  private TextView tv_min_decade; 
  // 分钟，个位 
  private TextView tv_min_unit; 
  // 秒，十位 
  private TextView tv_sec_decade; 
  // 秒，个位 
  private TextView tv_sec_unit; 
 
  private Context context; 
 
  private int hour_decade; 
  private int hour_unit; 
  private int min_decade; 
  private int min_unit; 
  private int sec_decade; 
  private int sec_unit; 
  // 计时器 
  private Timer timer; 
 
  private Handler handler = new Handler() { 
 
    public void handleMessage(Message msg) { 
      countDown(); 
    }; 
  }; 
 
  public RushBuyCountDownTimerView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
 
    this.context = context; 
    LayoutInflater inflater = (LayoutInflater) context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    View view = inflater.inflate(R.layout.view_countdowntimer, this); 
 
    tv_hour_decade = (TextView) view.findViewById(R.id.tv_hour_decade); 
    tv_hour_unit = (TextView) view.findViewById(R.id.tv_hour_unit); 
    tv_min_decade = (TextView) view.findViewById(R.id.tv_min_decade); 
    tv_min_unit = (TextView) view.findViewById(R.id.tv_min_unit); 
    tv_sec_decade = (TextView) view.findViewById(R.id.tv_sec_decade); 
    tv_sec_unit = (TextView) view.findViewById(R.id.tv_sec_unit); 
 
  } 
 
  /** 
   * 
   * @Description: 开始计时 
   * @param 
   * @return void 
   * @throws 
   */ 
  public void start() { 
 
    if (timer == null) { 
      timer = new Timer(); 
      timer.schedule(new TimerTask() { 
 
        @Override 
        public void run() { 
          handler.sendEmptyMessage(0); 
        } 
      }, 0, 1000); 
    } 
  } 
 
  /** 
   * 
   * @Description: 停止计时 
   * @param 
   * @return void 
   * @throws 
   */ 
  public void stop() { 
    if (timer != null) { 
      timer.cancel(); 
      timer = null; 
    } 
  } 
 
  /** 
   * @throws Exception 
   * 
   * @Description: 设置倒计时的时长 
   * @param 
   * @return void 
   * @throws 
   */ 
  public void setTime(int hour, int min, int sec) { 
 
    if (hour >= 60 || min >= 60 || sec >= 60 || hour < 0 || min < 0 
        || sec < 0) { 
      throw new RuntimeException("Time format is error,please check out your code"); 
    } 
 
    hour_decade = hour / 10; 
    hour_unit = hour - hour_decade * 10; 
 
    min_decade = min / 10; 
    min_unit = min - min_decade * 10; 
 
    sec_decade = sec / 10; 
    sec_unit = sec - sec_decade * 10; 
 
    tv_hour_decade.setText(hour_decade + ""); 
    tv_hour_unit.setText(hour_unit + ""); 
    tv_min_decade.setText(min_decade + ""); 
    tv_min_unit.setText(min_unit + ""); 
    tv_sec_decade.setText(sec_decade + ""); 
    tv_sec_unit.setText(sec_unit + ""); 
 
  } 
 
  /** 
   * 
   * @Description: 倒计时 
   * @param 
   * @return boolean 
   * @throws 
   */ 
  private void countDown() { 
 
    if (isCarry4Unit(tv_sec_unit)) { 
      if (isCarry4Decade(tv_sec_decade)) { 
 
        if (isCarry4Unit(tv_min_unit)) { 
          if (isCarry4Decade(tv_min_decade)) { 
 
            if (isCarry4Unit(tv_hour_unit)) { 
              if (isCarry4Decade(tv_hour_decade)) { 
                Toast.makeText(context, "时间到了", 
                    Toast.LENGTH_SHORT).show(); 
                stop(); 
              } 
            } 
          } 
        } 
      } 
    } 
  } 
 
  /** 
   * 
   * @Description: 变化十位，并判断是否需要进位 
   * @param 
   * @return boolean 
   * @throws 
   */ 
  private boolean isCarry4Decade(TextView tv) { 
 
    int time = Integer.valueOf(tv.getText().toString()); 
    time = time - 1; 
    if (time < 0) { 
      time = 5; 
      tv.setText(time + ""); 
      return true; 
    } else { 
      tv.setText(time + ""); 
      return false; 
    } 
 
  } 
 
  /** 
   * 
   * @Description: 变化个位，并判断是否需要进位 
   * @param 
   * @return boolean 
   * @throws 
   */ 
  private boolean isCarry4Unit(TextView tv) { 
 
    int time = Integer.valueOf(tv.getText().toString()); 
    time = time - 1; 
    if (time < 0) { 
      time = 9; 
      tv.setText(time + ""); 
      return true; 
    } else { 
      tv.setText(time + ""); 
      return false; 
    } 
 
  } 
}