效果圖：

京東秒殺是兩個小時一個場次，判斷本機的時間進行場次定時，然後在這兩個小時裡面進行倒計時。

MainActivity

package com.bwie.com.myapplication;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import java.sql.Date
 
;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

    private TextView miaosha_time;
    private TextView miaosha_shi;
    private TextView miaosha_minter;
    private TextView miaosha_second;
    private 
 
Handler handler = new Handler() {
        @Override
public void handleMessage(Message msg) {
            super.handleMessage(msg);
            setTime();
            sendEmptyMessageDelayed(0, 1000);
        }
    };
    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate
 
(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        handler.sendEmptyMessage(0);

    }
    public void initView(){
        miaosha_time = (TextView) findViewById(R.id.tv_miaosha_time);
        miaosha_shi = (TextView) findViewById(R.id.tv_miaosha_shi);
        miaosha_minter = (TextView) findViewById(R.id.tv_miaosha_minter);
        miaosha_second = (TextView) findViewById(R.id.tv_miaosha_second);
    }

    //秒殺倒計時
public void setTime() {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date curDate = new Date(System.currentTimeMillis());
        String format = df.format(curDate);
        StringBuffer buffer = new StringBuffer();
        String substring = format.substring(0, 11);
        buffer.append(substring);
        Log.d("ccc", substring);
        Calendar calendar = Calendar.getInstance();
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        if (hour % 2 == 0) {
            miaosha_time.setText(hour + "點場");
            buffer.append((hour + 2));
            buffer.append(":00:00");
        } else {
            miaosha_time.setText((hour - 1) + "點場");
            buffer.append((hour + 1));
            buffer.append(":00:00");
        }
        String totime = buffer.toString();
        try {
            java.util.Date date = df.parse(totime);
            java.util.Date date1 = df.parse(format);
            long defferenttime = date.getTime() - date1.getTime();
            long days = defferenttime / (1000 * 60 * 60 * 24);
            long hours = (defferenttime - days * (1000 * 60 * 60 * 24)) / (1000 * 60 * 60);
            long minute = (defferenttime - days * (1000 * 60 * 60 * 24) - hours * (1000 * 60 * 60)) / (1000 * 60);
            long seconds = defferenttime % 60000;
            long second = Math.round((float) seconds / 1000);
            miaosha_shi.setText("0" + hours + "");
            if (minute >= 10) {
                miaosha_minter.setText(minute + "");
            } else {
                miaosha_minter.setText("0" + minute + "");
            }
            if (second >= 10) {
                miaosha_second.setText(second + "");
            } else {
                miaosha_second.setText("0" + second + "");
            }


        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.bwie.com.myapplication.MainActivity">

    <LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center_vertical">

        <TextView
android:id="@+id/tv_miaosha"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="京東秒殺"
android:textColor="#f00" />

        <TextView
android:id="@+id/tv_miaosha_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="10點場" />

        <LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">


            <TextView
android:id="@+id/tv_miaosha_shi"
android:layout_width="15dp"
android:layout_height="15dp"
android:background="@drawable/shape_miaosha_time"
android:gravity="center"
android:text="1"
android:textColor="#fff"
android:textSize="10sp" />

            <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dp"
android:text=":" />

            <TextView
android:id="@+id/tv_miaosha_minter"
android:layout_width="15dp"
android:layout_height="15dp"
android:background="@drawable/shape_miaosha_time"
android:gravity="center"
android:text="1"
android:textColor="#fff"
android:textSize="10sp" />

            <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dp"
android:text=":" />

            <TextView
android:id="@+id/tv_miaosha_second"
android:layout_width="15dp"
android:layout_height="15dp"
android:background="@drawable/shape_miaosha_time"
android:gravity="center"
android:text="1"
android:textColor="#fff"
android:textSize="10sp" />
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="rectangle"
xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#000"></solid>
   <corners android:radius="3dp"></corners>

</shape>