两种TimePickers比较

Question

所以我允许用户选择两个日期开始和结束时间，并连接到通知方法，该方法将检查当前时间是否在他选择的时间范围内。然而，比较似乎 return 不是正确的结果。下面是 BrodcatRecevier 里面的方法：

    public void CheackAlarmAllow(){
    SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm");
    FinalTime = Calendar.getInstance();
    FinalTime.get(Calendar.HOUR);
    FinalTime.get(Calendar.MINUTE);
    FinalTime.get(Calendar.SECOND);
    FinalTimeS = dateFormat.format (FinalTime.getTime());


    DatabaseHelper db = new DatabaseHelper(this);
    ProfileHelper response = db.getNotification();

    try {
        FirstTime = dateFormat.parse (response.StartTimePicker);
        SecondTime = dateFormat.parse (response.EndimePicker);
        FinalTimeD = dateFormat.parse (FinalTimeS);


    }catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }


    if(FinalTimeD.after(FirstTime)&& FinalTime.before(SecondTime))
    {
        Log.w("Not Allowed","Working");
    }
    else
    {
        Log.w("FirstTime", String.valueOf(FirstTime));
        Log.w("Second", String.valueOf(SecondTime));
        Log.w("Final", String.valueOf(FinalTimeD));
        Log.w(" Allowed","Working");
        createNotification();
    }
}

这里是日志 returns。

06-03 08:14:10.597 30078-7708/com.ahmad.Project W/FirstTime: Thu Jan 01 
03:00:00 MST 1970

06-03 08:14:10.598 30078-7708/com.ahmad. Project W/Second: Thu Jan 01 
10:00:00 MST 1970

06-03 08:14:10.598 30078-7708/com.ahmad. Project W/Final: Thu Jan 01 
08:14:00 MST 1970

06-03 08:14:10.598 30078-7708/com.ahmad. Project W/ Allowed: Working

Answer 1

您的 if 检查 if(FinalTimeD.after(FirstTime)&& FinalTime.before(SecondTime)) 失败，因为 FirstTime 和 SeconfTime 属于 Date 和 Calendar.after() returns true 类型仅当传递的参数是 Calendar
类型时来自 Calender.after() 的 Oracle documentation:-

public boolean after(Object when) Returns whether this Calendar represents a time after the time represented by the specified Object. This method is equivalent to:
compareTo(when) > 0 if and only if when is a Calendar instance. Otherwise, the method returns false.

编辑（为了完整起见，从下面的评论中复制代码片段）

Calendar calendar = Calendar.getInstance(); 
Date newDate = calendar.setTime(date);

两种TimePickers比较

Two TimePickers comparison

android

datetimepicker

alarmmanager

android-jobscheduler