Next week implementation in android

问题

In my sample project i have to implement next week Monday to sunday in a text view (like 6 May >> 12 My). on click of next button it must show next week start date and end date (like 13 May >> 19 May). I have implemented the intial week view with the following code

   Calendar c = Calendar.getInstance();
    c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
    SimpleDateFormat df = new SimpleDateFormat("dd MMMM");
    String printDate = df.format(c.getTime());
    //gestureEvent.setText(reportDate);
    c.add(Calendar.DAY_OF_WEEK, 6);
    String printDate2 = df2.format(c.getTime());
    gestureEvent.setText(reportDate +" >> "+reportDate2);

on click of next week button i have done this but it static it was just an attempt attempt :)

onclick will call this function goNextWeek()

public void goNextWeek()
{

    Calendar c = Calendar.getInstance();
    c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);

        c.add(Calendar.DAY_OF_WEEK, 6);
        System.out.println("End Date : " + c.getTime());

        SimpleDateFormat df = new SimpleDateFormat("dd MMMM");
        String reportDate = df.format(c.getTime());
        gestureEvent.setText(reportDate);
        c.add(Calendar.DAY_OF_WEEK, dates);
        c.add(Calendar.DAY_OF_WEEK, 1);
        System.out.println("End Date asdfadf: " + c.getTime()); 


}

please tell me how to show next week start and end date?

回答1:

Here is your solution.

Calendar mCalendar = new GregorianCalendar(); 
        mCalendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
        SimpleDateFormat mDF = new SimpleDateFormat("dd MMMM");
        String printDate = mDF.format(mCalendar.getTime());
        mCalendar.add(Calendar.DAY_OF_MONTH, 6);
        String printDate2 = mDF.format(mCalendar.getTime());

        System.out.println(printDate + " >> " + printDate2);
        gestureEvent.setText(printDate + " >> " + printDate2);

---

Update for implementation on button

Write a method, which will take weekNumber as params..

private static String getNextWeek(int weekFromToday) {
        Calendar mCalendar = new GregorianCalendar(); 
        mCalendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
        mCalendar.set(Calendar.WEEK_OF_YEAR, 
                mCalendar.get(Calendar.WEEK_OF_YEAR) + weekFromToday);          

        SimpleDateFormat mDF = new SimpleDateFormat("dd MMMM");
        String printDate = mDF.format(mCalendar.getTime());
        System.out.println(printDate);

        //gestureEvent.setText(reportDate);
        mCalendar.add(Calendar.DAY_OF_MONTH, 6);
        String printDate2 = mDF.format(mCalendar.getTime());
        System.out.println(printDate + " >> " + printDate2);
        return printDate + " >> " + printDate2;        
    }

Now declaire a static filed as

private static int weekNumber = -1; 

and write below code on button click

weekNumber = weekNumber + 1;
gestureEvent.setText(getNextWeek(weekNumber));

This will work.

Happy coding :)

回答2:

This kind of date-time work is easier with the Joda-Time 2.3 library.

If you truly want date only without time component, modify this code to use LocalDate class rather than DateTime.

// © 2013 Basil Bourque. This source code may be used freely forever by anyone taking full responsibility for doing so.
// import org.joda.time.*;
// import org.joda.time.format.*;

DateTime today = new DateTime().withTimeAtStartOfDay();

// Monday
DateTime monday = today.withDayOfWeek( DateTimeConstants.MONDAY ).withTimeAtStartOfDay();
if ( !(monday.isAfter( today )) ) {
    // If monday is today or earlier, move forward to future.
    monday = monday.plusWeeks( 1 );
}

// Sunday
DateTime sunday = today.withDayOfWeek( DateTimeConstants.SUNDAY ).withTimeAtStartOfDay();
if ( !(sunday.isAfter( today )) ) {
    // If sunday is today or earlier, move forward to future.
    sunday = sunday.plusWeeks( 1 );
}

System.out.println( "today: " + today );
System.out.println( "Monday: " + monday );
System.out.println( "Sunday: " + sunday );

When run…

today: 2013-12-08T00:00:00.000-08:00
Monday: 2013-12-09T00:00:00.000-08:00
Sunday: 2013-12-15T00:00:00.000-08:00

来源：https://stackoverflow.com/questions/16434108/next-week-implementation-in-android