Question

我想在我的Android应用程序中比较两次（时间戳）。这是我的功能，检查当前时间是否在两个给定时间之间。

private boolean isBetween(String t1, String t2, String target){
    boolean result = false;
    try{

        Date time1 = new SimpleDateFormat("HH:mm:ss").parse(t1);
        Calendar calendar1 = Calendar.getInstance();
        calendar1.setTime(time1);


        Date time2 = new SimpleDateFormat("HH:mm:ss").parse(t2);
        Calendar calendar2 = Calendar.getInstance();
        calendar2.setTime(time2);
        calendar2.add(Calendar.DATE, 1);


        Date d = new SimpleDateFormat("HH:mm:ss").parse(target);
        Calendar calendar3 = Calendar.getInstance();
        calendar3.setTime(d);
        calendar3.add(Calendar.DATE, 1);

        Date x = calendar3.getTime();
        if (x.after(calendar1.getTime()) && x.before(calendar2.getTime())) {
            result = true;
            //checkes whether the current time is between 14:49:00 and 20:11:13.

            //Toast.makeText(UserCheckout.this, "The time is between", Toast.LENGTH_SHORT).show();
        }
    }
    catch (ParseException e){
        result = false;
        Toast.makeText(UserCheckout.this, e.getMessage(), Toast.LENGTH_SHORT).show();
    }
    return result;
}

以下是我使用此功能的方法。

if (isBetween("19:00:00", "20:00:00", currentTime)){
    Toast.makeText(this, "Time is  between 7 and 8", Toast.LENGTH_SHORT).show();
}

if (isBetween("20:00:00", "21:00:00", currentTime)){
    Toast.makeText(this, "Time is between 8 and 9", Toast.LENGTH_SHORT).show();
}

但我得到的结果都是真的。

Answer 1

致电：

private boolean isBetween(String t1, String t2, String target){
    boolean result = false;
    try{

        Date time1 = new SimpleDateFormat("HH:mm:ss").parse(t1);
        Calendar calendar1 = Calendar.getInstance();
        calendar1.setTime(time1);


        Date time2 = new SimpleDateFormat("HH:mm:ss").parse(t2);
        Calendar calendar2 = Calendar.getInstance();
        calendar2.setTime(time2);


        Date d = new SimpleDateFormat("HH:mm:ss").parse(target);
        Calendar calendar3 = Calendar.getInstance();
        calendar3.setTime(d);


        Date x = calendar3.getTime();
        if (x.after(calendar1.getTime()) && x.before(calendar2.getTime())) {
            result = true;
            //checkes whether the current time is between 14:49:00 and 20:11:13.

            //Toast.makeText(UserCheckout.this, "The time is between", Toast.LENGTH_SHORT).show();
        }
    }
    catch (ParseException e){
        result = false;
        Toast.makeText(UserCheckout.this, e.getMessage(), Toast.LENGTH_SHORT).show();
    }
    return result;
}

您要为这些日期添加一天。您正在检查您的“目标”日期（向前转换一天）是否在“19:00:00”和“20:00:00（明天）”和“20:00:00”和“21:00之间”： 00（明天）“

将您的代码更改为：

using LibaryData.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace LibaryManagmentSystems.Models.Catalog
{
    public class AssetDetailModel
    {
        public int AssetID { get; set; }
        public string Title { get; set; }
        public string AuthorOrDirector { get; set; }
        public string Type { get; set; }
        public int Year { get; set; }
        public string ISBN { get; set; }
        public string DeweyCallNumber { get; set; }
        public string  Status { get; set; }
        public decimal Cost { get; set; }
        public string CurrentLocation { get; set; }
        public string ImageURL { get; set; }
        public int PatronName { get; set; }
        public Checkout LatestChechout { get; set; }
        public IEnumerable<CheckoutHistory> CheckoutHistory { get; set; }
        public IEnumerable<AssetHoldModel> CurrentHolds { get; set; }
    }

    public class AssetHoldModel
    {
        public string PatronName { get; set; }
        public string HoldPlace { get; set; }


    }
}

如何在android中进行两次比较？

1 个答案: