安卓时间SLots

Question

我在我的应用程序的RecyclerView中有这个绑定时间槽的方法，但我想要其他的方法

private ArrayList<String> getTimeSet() {
    ArrayList results = new ArrayList<String>();
    SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");
    for (int i = 0; i < 9; i++) {
       Calendar calendar = new GregorianCalendar();
       calendar.add(Calendar.HOUR_OF_DAY, i);
       String day = sdf.format(calendar.getTime());
       results.add(i, day);
    }
    return results;
}

​

​

这是上面几行代码的结果

但我想要这样的东西，改变应用程序不从当前时间开始的前一个时间，例如，如果是4点，那么时间段必须从4点开始，建议我的朋友们。

​

Answer 1

我已经修改了你的方法。请检查一下这个。只需传递布尔值，即可检查当天是否为当天。

private ArrayList<String> getTimeSet(boolean isCurrentDay) {
    ArrayList results = new ArrayList<String>();
    SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");
    for (int i = 0; i < 9; i++) {
        Calendar calendar = new GregorianCalendar();
        if(!isCurrentDay)
            calendar.set(Calendar.HOUR_OF_DAY, 9);
        calendar.add(Calendar.HOUR_OF_DAY, i);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        String day1 = sdf.format(calendar.getTime());
        calendar.add(Calendar.HOUR, 1);
        String day2 = sdf.format(calendar.getTime());
        String day = day1 + " - " + day2;
        results.add(i, day);
    }
    return results;
}

或

您可以使用此方法获取第二天的时间段。但是，如果您将当前日期布尔值传递给上述方法，并检查日期是今天还是次日，效果会更好。

private ArrayList<String> getNextDayTimeSet() {
    ArrayList results = new ArrayList<String>();
    SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");
    for (int i = 0; i < 9; i++) {
        Calendar calendar = new GregorianCalendar();
        calendar.set(Calendar.HOUR_OF_DAY, 9); //Added this line only
        calendar.add(Calendar.HOUR_OF_DAY, i);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        String day1 = sdf.format(calendar.getTime());
        calendar.add(Calendar.HOUR, 1);
        String day2 = sdf.format(calendar.getTime());
        String day = day1 + " - " + day2;
        results.add(i, day);
    }
    return results;
}

Answer 2

我已经创建了一个用于生成时隙和日期槽的类。试一下代码，

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;

/**
 *
 * @author Neeraj
 */
public class DateSlotClass {

    public static void main(String[] args) {
        ArrayList<String> dateList = getDataSet();
        System.out.println(dateList);
        for (String string : dateList) {
            System.out.println(getTimeSet(string));
        }
    }

    /**
     * Generates the time slots based on the date provided
     *
     * @param dateString the chosen date
     * @return list of times
     */
    private static ArrayList<String> getTimeSet(String dateString) {
        ArrayList results = new ArrayList();
        try {
            SimpleDateFormat inSdf = new SimpleDateFormat("EEE : dd-MMM");
            Date inDate = inSdf.parse(dateString);
            Calendar cal = Calendar.getInstance();
            cal.setTime(inDate);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.YEAR, Calendar.getInstance().get(Calendar.YEAR));
            cal.set(Calendar.HOUR, Calendar.getInstance().get(Calendar.HOUR) + 1);

            if (!isTodaysDate(cal)) {
                cal = Calendar.getInstance();
                cal.set(Calendar.HOUR, 9);
                cal.set(Calendar.MINUTE, 0);
            }

            results = new ArrayList<>();
            SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");
            for (int i = 0; i < 9; i++) {
                String time1 = sdf.format(cal.getTime());
                cal.add(Calendar.HOUR, 1);
                String time2 = sdf.format(cal.getTime());
                String day = time1 + " - " + time2;
                results.add(i, day);
            }
        } catch (ParseException ex) {
            ex.printStackTrace();
        }
        return results;
    }

    /**
     * Test if the given date is today
     *
     * @param input the chosen date
     * @return true if date is todays
     */
    private static boolean isTodaysDate(Calendar input) {
        SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");

        String inString = sdf.format(input.getTime());

        Calendar today = Calendar.getInstance();
        String todayString = sdf.format(today.getTime());

        return inString.equals(todayString);
    }

    /**
     * Generates the date slots based on the date provided
     *
     * @param dateString the chosen date
     * @return list of dates
     */
    private static ArrayList<String> getDataSet() {
        ArrayList results = new ArrayList<String>();
        SimpleDateFormat sdf = new SimpleDateFormat("EEE : dd-MMM");
        Calendar calendar = Calendar.getInstance();
        for (int i = 0; i < 7; i++) {
            String day = sdf.format(calendar.getTime());
            results.add(i, day);
            calendar.add(Calendar.DATE, 1);
        }
        return results;
    }

}