Android 仿京东秒杀倒计时代码

效果图如下所示：

由于我仿的京东是分模块的,所以,这次主要描述秒杀模块!

首先设置好时间的背景

drawable文件下创建shape_miaosha_time.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
 android:shape="rectangle">
 <solid android:color="#000"></solid>
 <corners android:radius="2.5dp"></corners>
</shape>

然后主要布局,你可以单独书写,然后引用出去

**count_down.xml**
<?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="#FFFFFF"
 android:orientation="vertical">
 <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="8dp"
   android:text="京东秒杀"
   android:textColor="#f00"
   android:textSize="20sp" />
  <TextView
   android:id="@+id/tv_miaosha_time"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:padding="5dp"
   android:text="12点场"
   android:textSize="20sp" />
  <LinearLayout
   android:layout_width="wrap_content"
   android:layout_height="wrap_content">
   <TextView
    android:id="@+id/tv_miaosha_shi"
    android:layout_width="25dp"
    android:layout_height="25dp"
    android:background="@drawable/shape_miaosha_time"
    android:gravity="center"
    android:text="1"
    android:textColor="#fff"
    android:textSize="15sp" />
   <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="25dp"
    android:layout_height="25dp"
    android:background="@drawable/shape_miaosha_time"
    android:gravity="center"
    android:text="1"
    android:textColor="#fff"
    android:textSize="15sp" />
   <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="25dp"
    android:layout_height="25dp"
    android:background="@drawable/shape_miaosha_time"
    android:gravity="center"
    android:text="1"
    android:textColor="#fff"
    android:textSize="15sp" />
  </LinearLayout>
 </LinearLayout>
</LinearLayout>

这里写逻辑代码

//使用handler用于更新UI
private Handler handler = new Handler() {
  @Override
  public void handleMessage(Message msg) {
   super.handleMessage(msg);
   countDown();
   sendEmptyMessageDelayed(0, 1000);
  }
 };
 /**
  * 秒杀
  */
 private void countDown() {
  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) {
   mMiaoshaTimeTv.setText(hour + "点场");
   buffer.append((hour + 2));
   buffer.append(":00:00");
  } else {
   mMiaoshaTimeTv.setText((hour - 1) + "点场");
   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);
   mMiaoshaShiTv.setText("0" + hours + "");
   if (minute >= 10) {
    mMiaoshaMinterTv.setText(minute + "");
   } else {
    mMiaoshaMinterTv.setText("0" + minute + "");
   }
   if (second >= 10) {
    mMiaoshaSecondTv.setText(second + "");
   } else {
    mMiaoshaSecondTv.setText("0" + second + "");
   }
  } catch (ParseException e) {
   e.printStackTrace();
  }
 }

注意,这里才是开启的代码

private void startCountDown() {
  handler.sendEmptyMessage(0);
 }

总结

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