今天專案用到了搶購時倒計時的功能 ，今天找了好多哥們，也百度了好多，但是沒有自己喜歡並且能消化的。好不容易找到了一個能容易看懂的，然而又不符合我想要的需求，所以自己搞一下。不知道是否簡單，但是最起碼是專案的功能可以實現。（一下午，沒白費。開心）
直接上程式碼好了，我相信都能看懂。我除外。（我搞了一下午）哎。反正現在懂點了。。。

package com.qust.widght;

import java.text.SimpleDateFormat;
import java.util.Date;
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.util.Log;
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 {

    // 天，十位
    private TextView tv_day_decade;
    // 天，個位
    private TextView tv_day_unit;
    // 小時，十位
    private TextView tv_hour_decade;
    // 小時，個位
 

    private TextView tv_hour_unit;
    // 分鐘，十位
    private TextView tv_min_decade;
    // 分鐘，個位
    private TextView tv_min_unit;
    // 秒，十位
    private TextView tv_sec_decade;
    // 秒，個位
    private TextView tv_sec_unit;

    private Context context;
    private int day_decade;
    private int day_unit;

    private int hour_decade;
    private int hour_unit;
    private int min_decade;
    private int min_unit;
    private int sec_decade;
    private int sec_unit;
    // 計時器
    private Timer timer;

    private Handler handler = new Handler() {

        public void handleMessage(Message msg) {
            countDown();
        };
    };
    private int day = 0;
    private int hour = 0;
    private int min = 0;
    private int sec = 0;

    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_day_decade = (TextView) view.findViewById(R.id.tv_day_decade);
        tv_day_unit = (TextView) view.findViewById(R.id.tv_day_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: 開始計時
     * @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: 停止計時
     * @param
     * @return void
     * @throws
     */
    public void stop() {
        if (timer != null) {
            timer.cancel();
            timer = null;
        }
    }

    // 如果:sum = 12345678
    public void addTime(int sum) {

        // 求出天數
        int day = sum / 60 / 60 / 24;
        // int day_time = sum % 24;
        Log.e("小時", day + "");
        Log.e("小時", sum % 24 + "");

        // 求出小時
        // int hour = day_time / 60;
        // int hour_time = day_time % 60;
        //
        // Log.e("小時", hour + "");
        //
        // 先獲取個秒數值
        int sec = sum % 60;
        // 如果大於60秒，獲取分鐘。（秒數）
        int sec_time = sum / 60;
        // 再獲取分鐘
        int min = sec_time % 60;
        // 如果大於60分鐘，獲取小時（分鐘數）。
        int min_time = sec_time / 60;
        // 獲取小時
        int hour = min_time % 24;
        // 剩下的自然是天數
        day = min_time / 24;

        //
        // Log.e("分鐘", min + "");
        //
        // // 求出秒數
        // Log.e("秒數", sec + "");
        setTime(day, hour, min, sec);

    }

    /**
     * @throws Exception
     * 
     * @Description: 設定倒計時的時長
     * @param
     * @return void
     * @throws
     */
    public void setTime(int day, int hour, int min, int sec) {
    //這裡的天數不寫也行，我寫365
        if (day >= 365 || hour >= 24 || min >= 60 || sec >= 60 || day < 0
                || hour < 0 || min < 0 || sec < 0) {
            throw new RuntimeException(
                    "Time format is error,please check out your code");
        }
        // day 的十位數
        day_decade = day / 10;
        // day的個位數,這裡求餘就行
        day_unit = day - day_decade * 10;

        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;
        // 第個time 進行初始化
        timeClean();

    }

    private void timeClean() {
        tv_day_decade.setText(day_decade + "");
        tv_day_unit.setText(day_unit + "");
        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: 倒計時
     * @param
     * @return boolean
     * @throws
     */
    public Boolean countDown() {

        if (isCarry4Unit(tv_sec_unit)) {
            if (isCarry4Decade(tv_sec_decade)) {

                if (isCarry4Unit(tv_min_unit)) {
                    if (isCarry4Decade(tv_min_decade)) {

                        if (isDay4Unit(tv_hour_unit)) {
                            if (isDay4Decade(tv_hour_decade)) {

                                if (isDay4Unit(tv_day_unit)) {
                                    if (isDay4Decade(tv_day_decade)) {
                                        Toast.makeText(context, "時間到了",
                                                Toast.LENGTH_SHORT).show();
                                        tv_day_decade.setText("0");
                                        tv_day_unit.setText("0");
                                        tv_hour_decade.setText("0");
                                        tv_hour_unit.setText("0");
                                        tv_min_decade.setText("0");
                                        tv_min_unit.setText("0");
                                        tv_sec_decade.setText("0");
                                        tv_sec_unit.setText("0");
                                        stop();
                                        return false;

                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
        return false;
    }

    /**
     * 進行——時分秒，判斷個位數
     * 
     * @Description: 變化十位，並判斷是否需要進位
     * @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;
        }

    }

    /**
     * 進行——時分秒，判斷個位數
     * 
     * @Description: 變化個位，並判斷是否需要進位
     * @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;
        }

    }

    /**
     * 進行——時分秒，判斷個位數
     * 
     * @Description: 變化十位，並判斷是否需要進位
     * @param
     * @return boolean
     * @throws
     */
    private boolean isDay4Unit(TextView tv) {

        int time = Integer.valueOf(tv.getText().toString());
        time = time - 1;
        if (time < 0) {
            time = 3;
            tv.setText(time + "");
            return true;
        } else {
            tv.setText(time + "");
            return false;
        }

    }

    /**
     * 進行——時分秒，判斷個位數
     * 
     * @Description: 變化個位，並判斷是否需要進位
     * @param
     * @return boolean
     * @throws
     */
    private boolean isDay4Decade(TextView tv) {

        int time = Integer.valueOf(tv.getText().toString());
        time = time - 1;
        if (time < 0) {
            time = 2;
            tv.setText(time + "");
            return true;
        } else {
            tv.setText(time + "");
            return false;
        }

    }

}

主類進行呼叫

package com.qust.widght;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

import com.qust.rushbuycountdowntimerview.R;

public class MainActivity extends Activity {

    private RushBuyCountDownTimerView timerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        timerView = (RushBuyCountDownTimerView) findViewById(R.id.timerView);
        // 設定時間(day,hour,min,sec)
        // timerView.setTime(0, 0, 0, 5);
        int sum = 60;
        // 把秒數傳到倒計時方法中。。
        timerView.addTime(sum);
        // 開始倒計時
        timerView.start();
    }
}

佈局檔案

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <com.qust.widght.RushBuyCountDownTimerView
        android:id="@+id/timerView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >
    </com.qust.widght.RushBuyCountDownTimerView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@android:color/white"
    android:orientation="horizontal"
    android:padding="10dp" >

    <TextView
        android:id="@+id/tv_day_decade"
        style="@style/RushBuyCountDownTimerViewStyle" />

    <TextView
        android:id="@+id/tv_day_unit"
        style="@style/RushBuyCountDownTimerViewStyle"
        android:layout_marginLeft="1dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        android:gravity="center"
        android:text=":"
        android:textColor="#4F4242"
        android:textSize="30sp" />

    <TextView
        android:id="@+id/tv_hour_decade"
        style="@style/RushBuyCountDownTimerViewStyle" />

    <TextView
        android:id="@+id/tv_hour_unit"
        style="@style/RushBuyCountDownTimerViewStyle"
        android:layout_marginLeft="1dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        android:gravity="center"
        android:text=":"
        android:textColor="#4F4242"
        android:textSize="30sp" />

    <TextView
        android:id="@+id/tv_min_decade"
        style="@style/RushBuyCountDownTimerViewStyle" />

    <TextView
        android:id="@+id/tv_min_unit"
        style="@style/RushBuyCountDownTimerViewStyle"
        android:layout_marginLeft="1dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        android:gravity="center"
        android:text=":"
        android:textColor="#4F4242"
        android:textSize="30sp" />

    <TextView
        android:id="@+id/tv_sec_decade"
        style="@style/RushBuyCountDownTimerViewStyle" />

    <TextView
        android:id="@+id/tv_sec_unit"
        style="@style/RushBuyCountDownTimerViewStyle"
        android:layout_marginLeft="1dp" />

</LinearLayout>

希望可以幫到有需求的人。同時以後自己忘記時也能看一眼