OnApplicationFocus & OnApplicationPause &时间戳

锁屏、切到后台 程序强制暂停时使用

  private long leaveTime;
    private void OnApplicationFocus(bool focus)
    {
        if (focus==false)
        {
            // 暂时APP切换到后台
            this.leaveTime = GetTimeStamp;
        }
        else
        {
            // 再次进入的时间
            long now = GetTimeStamp;
            if (this.leaveTime>0&&now -this.leaveTime>3)
            {
                //退出
            }
        }
    }
    private void OnApplicationPause(bool pause)
    {
        if (pause)
        {
            // app 暂停
            this.leaveTime = GetTimeStamp;
        }
        else
        {
            long now = GetTimeStamp;
            if (this.leaveTime > 0 && now - this.leaveTime > 3)
            {
                //退出
            }
        }
    }

转换自 1970.1.1至今的时间

using System;
static readonly DateTime DataTime1970 = new DateTime(1970, 1, 1);
  // 返回时间戳（秒）
    public static long GetTimeStamp
    {
        get
        {
            TimeSpan ts = DateTime.UtcNow - DataTime1970;
            return Convert.ToInt64(ts.TotalSeconds);
        }
    }
    /// 返回时间戳毫秒
    public static long GetTimeStapMs
    {
        get
        {
            TimeSpan ts = DateTime.UtcNow - DataTime1970;
            return Convert.ToInt64(ts.TotalMilliseconds);
        }
    }