android使用CountDownTimer类，实现类似抢购的倒计时控件

来源：互联网发布：lomo拍立得知乎编辑：程序博客网时间：2024/05/21 09:25

CountDownTimer由系统提供的。

倒计时核心代码：

参数：

MyCountDownTimer mc = new MyCountDownTimer(280000, 100)mc.start();

mc.start();方法开始

mc.cancel();方法结束

<span style="font-size:14px;"> /**     * 继承 CountDownTimer 防范     *     * 重写 父类的方法 onTick() 、 onFinish()     */    class MyCountDownTimer extends CountDownTimer {        /**         *         * @param millisInFuture         *      表示以毫秒为单位 倒计时的总数         *         *      例如 millisInFuture=1000 表示1秒         *         * @param countDownInterval         *      表示 间隔 多少微秒 调用一次 onTick 方法         *         *      例如: countDownInterval =1000 ; 表示每1000毫秒调用一次onTick()         *         */        public MyCountDownTimer(long millisInFuture, long countDownInterval) {            super(millisInFuture, countDownInterval);        }        @Override        public void onFinish() {//结束时调用                   }        /**         * 处理时间倒计时进行页面刷新         * @param millisUntilFinished         */        @Override        public void onTick(long millisUntilFinished) {            int ss = 1000;            int mi = ss * 60;            long minute = millisUntilFinished/ mi;            long second = (millisUntilFinished- minute * mi) / ss;            long milliSecond = millisUntilFinished  - minute * mi - second * ss;            String strMinute = minute < 10 ? "0" + minute : "" + minute;//分钟            String strSecond = second < 10 ? "0" + second : "" + second;//秒            String strMilliSecond = milliSecond < 10 ? "0" + milliSecond : "" + milliSecond;//毫秒            strMilliSecond = milliSecond >100 ? strMilliSecond.substring(0,strMilliSecond.length()-1) : "" + strMilliSecond;            tv_status.setText(strMinute + " 分 "+strSecond+"秒"+strMilliSecond);        }    }</span>

完整代码：

public class CommodityBuyView extends LinearLayout {    private TextView tv_goods_desc,tv_status,tv_awardee;    private MyCountDownTimer mc;    private LinearLayout ll_result;    private String awardee;    public CommodityBuyView(Context context) {        this(context, null);    }    public CommodityBuyView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public CommodityBuyView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        initView(context);    }    /**     * find 控件，初始化     * @param context     */    private void initView(Context context) {        LayoutInflater inflater = (LayoutInflater) context                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);        View view=inflater.inflate(R.layout.view_commodity_buying,this);        tv_goods_desc= (TextView) view.findViewById(R.id.tv_goods_desc);        tv_status= (TextView) view.findViewById(R.id.tv_status);        tv_awardee= (TextView) view.findViewById(R.id.tv_awardee);        ll_result= (LinearLayout) view.findViewById(R.id.ll_result);        tv_status=(TextView) view.findViewById(R.id.tv_status);        mc = new MyCountDownTimer(280000, 100);        mc.start();    }    /**     * 继承 CountDownTimer 防范     *     * 重写 父类的方法 onTick() 、 onFinish()     */    class MyCountDownTimer extends CountDownTimer {        /**         *         * @param millisInFuture         *      表示以毫秒为单位 倒计时的总数         *         *      例如 millisInFuture=1000 表示1秒         *         * @param countDownInterval         *      表示 间隔 多少微秒 调用一次 onTick 方法         *         *      例如: countDownInterval =1000 ; 表示每1000毫秒调用一次onTick()         *         */        public MyCountDownTimer(long millisInFuture, long countDownInterval) {            super(millisInFuture, countDownInterval);        }        @Override        public void onFinish() {            tv_status.setText("揭晓中....");               new Handler().postDelayed(new Runnable() {                   @Override                   public void run() {                       tv_status.setVisibility(View.GONE);                       ll_result.setVisibility(View.VISIBLE);                       tv_awardee.setText(awardee);                   }               }, 5000);        }        /**         * 处理时间倒计时进行页面刷新         * @param millisUntilFinished         */        @Override        public void onTick(long millisUntilFinished) {            int ss = 1000;            int mi = ss * 60;            long minute = millisUntilFinished/ mi;            long second = (millisUntilFinished- minute * mi) / ss;            long milliSecond = millisUntilFinished  - minute * mi - second * ss;            String strMinute = minute < 10 ? "0" + minute : "" + minute;//分钟            String strSecond = second < 10 ? "0" + second : "" + second;//秒            String strMilliSecond = milliSecond < 10 ? "0" + milliSecond : "" + milliSecond;//毫秒            strMilliSecond = milliSecond >100 ? strMilliSecond.substring(0,strMilliSecond.length()-1) : "" + strMilliSecond;            tv_status.setText(strMinute + " 分 "+strSecond+"秒"+strMilliSecond);        }    }    /**     * 设置获奖人     * @param awardee     */    public void setAwardee(String awardee){        this.awardee= awardee;    }}

</pre><pre code_snippet_id="1861900" snippet_file_name="blog_20160901_5_44330" name="code" class="java">xml布局

<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:gravity="center_horizontal"    >    <ImageView        android:id="@+id/iv_goods_img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/goods"        android:layout_marginTop="10dp"        android:scaleType="fitXY"/>    <TextView        android:id="@+id/tv_goods_desc"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="18sp"        android:layout_marginTop="20dp"        android:text="iphone6s 128G (颜色随机)"/>    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginTop="20dp"        android:layout_marginLeft="10dp"        android:layout_marginRight="10dp"        >        <TextView            android:id="@+id/tv_status"            android:layout_width="match_parent"            android:layout_height="40dp"            android:textSize="16sp"            android:textColor="#ffffff"            android:background="@drawable/bg"            android:layout_centerInParent="true"            android:gravity="center"            android:text="揭晓中..."/>        <LinearLayout            android:id="@+id/ll_result"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="horizontal"            android:paddingLeft="10dp"            android:paddingRight="10dp"            android:gravity="center"            android:visibility="gone"            android:layout_centerInParent="true">            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:textColor="#ffffff"                android:padding="5dp"                android:text="中奖"                android:background="@drawable/et_bg"/>            <TextView                android:id="@+id/tv_awardee"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:textColor="#ffffff"                android:layout_marginLeft="10dp"                android:text="bb"/>        </LinearLayout>    </RelativeLayout></LinearLayout>

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