Android实现时间倒计时功能

本文实例为大家分享了android实现时间倒计时功能展示的具体代码，供大家参考，具体内容如下

效果展示

mainactivity（主页面代码）

public class mainactivity extends activity {

  private relativelayout countdown;
  // 倒计时
  private textview daystv, hourstv, minutestv, secondstv;
  private long mday = 10;
  private long mhour = 10;
  private long mmin = 30;
  private long msecond = 00;// 天 ,小时,分钟,秒
  private boolean isrun = true;
  private handler timehandler = new handler() {

    @override
    public void handlemessage(message msg) {
      super.handlemessage(msg);
      if (msg.what==1) {
        computetime();
        daystv.settext(mday+"");
        hourstv.settext(mhour+"");
        minutestv.settext(mmin+"");
        secondstv.settext(msecond+"");
        if (mday==0&&mhour==0&&mmin==0&&msecond==0) {
          countdown.setvisibility(view.gone);
        }
      }
    }
  };

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);

    countdown = (relativelayout) findviewbyid(r.id.countdown_layout);
    daystv = (textview) findviewbyid(r.id.days_tv);
    hourstv = (textview) findviewbyid(r.id.hours_tv);
    minutestv = (textview) findviewbyid(r.id.minutes_tv);
    secondstv = (textview) findviewbyid(r.id.seconds_tv);

    startrun();
  }

  /**
   * 开启倒计时
   */
  private void startrun() {
    new thread(new runnable() {

      @override
      public void run() {
        // todo auto-generated method stub
        while (isrun) {
          try {
            thread.sleep(1000); // sleep 1000ms
            message message = message.obtain();
            message.what = 1;
            timehandler.sendmessage(message);
          } catch (exception e) {
            e.printstacktrace();
          }
        }
      }
    }).start();
  }

  /**
   * 倒计时计算
   */
  private void computetime() {
    msecond--;
    if (msecond < 0) {
      mmin--;
      msecond = 59;
      if (mmin < 0) {
        mmin = 59;
        mhour--;
        if (mhour < 0) {
          // 倒计时结束
          mhour = 23;
          mday--;
        }
      }
    }
  }
}

main（主页面布局）

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/countdown_layout"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@android:color/white"
  android:gravity="center" >

  <relativelayout
    android:id="@+id/daojishi_rl"
    android:layout_width="match_parent"
    android:layout_height="40.0dip"
    android:layout_marginleft="10.0dip"
    android:layout_marginright="10.0dip"
    android:gravity="center" >

    <imageview
      android:id="@+id/describe_iv"
      android:layout_width="40.0dip"
      android:layout_height="40.0dip"
      android:background="@drawable/clock"
      android:gravity="center_vertical" />

    <textview
      android:id="@+id/describe_tv"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centervertical="true"
      android:layout_marginright="5.0dip"
      android:layout_torightof="@+id/describe_iv"
      android:text="距离活动还有 "
      android:textsize="25sp" />

    <textview
      android:id="@+id/days_tv"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centervertical="true"
      android:layout_torightof="@+id/describe_tv"
      android:textcolor="@color/coloraccent"
      android:gravity="center"
      android:text="20"
      android:textsize="20sp" />

    <textview
      android:id="@+id/colon0"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centervertical="true"
      android:layout_marginleft="5.0dip"
      android:layout_marginright="3.0dip"
      android:layout_torightof="@+id/days_tv"
      android:text="天"
      android:textsize="20sp"
      android:textstyle="bold" />
  </relativelayout>

  <relativelayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/daojishi_rl"
    android:gravity="center_horizontal" >

    <textview
      android:id="@+id/hours_tv"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centervertical="true"
      android:layout_toleftof="@+id/colon1"
      android:textcolor="@color/coloraccent"
      android:gravity="center"
      android:text="23"
      android:textsize="20sp" />

    <textview
      android:id="@+id/colon1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centervertical="true"
      android:layout_marginleft="3.0dip"
      android:layout_marginright="3.0dip"
      android:layout_toleftof="@+id/minutes_tv"
      android:text=":"
      android:textsize="20sp"
      android:textstyle="bold" />

    <textview
      android:id="@+id/minutes_tv"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centervertical="true"
      android:layout_toleftof="@+id/colon2"
      android:textcolor="@color/coloraccent"
      android:gravity="center"
      android:text="59"
      android:textsize="20sp" />

    <textview
      android:id="@+id/colon2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centervertical="true"
      android:layout_marginleft="3.0dip"
      android:layout_marginright="3.0dip"
      android:layout_toleftof="@+id/seconds_tv"
      android:text=":"
      android:textsize="20sp"
      android:textstyle="bold" />

    <textview
      android:id="@+id/seconds_tv"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignparentright="true"
      android:layout_centervertical="true"
      android:gravity="center"
      android:text="59"
      android:textcolor="@color/coloraccent"
      android:textsize="20sp" />
  </relativelayout>

</relativelayout>

谢谢观看，小编祝大家生活愉快！

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