generate dates between two date in Android

Question

How to get all dates between two dates in Android.

For example. I have two Strings.

String first="2012-07-15";  
String second="2012-07-21"; 

I convert and get dates from these strings.

DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");                                    
DateFormat df2 = new SimpleDateFormat("MMM dd");
String mydate = df2.format(df1.parse(first));

This way I get both dates from first and second String.

Now I also display all dates between these two dates.

Answer 1

it is better not to use any hardcoded values in date calculations. we can rely on java Calendar class methods to do this task

see the code

private static List<Date> getDates(String dateString1, String dateString2)
{
    ArrayList<Date> dates = new ArrayList<Date>();
    DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");

    Date date1 = null;
    Date date2 = null;

    try {
        date1 = df1 .parse(dateString1);
        date2 = df1 .parse(dateString2);
    } catch (ParseException e) {
        e.printStackTrace();
    }

    Calendar cal1 = Calendar.getInstance();
    cal1.setTime(date1);


    Calendar cal2 = Calendar.getInstance();
    cal2.setTime(date2);

    while(!cal1.after(cal2))
    {
        dates.add(cal1.getTime());
        cal1.add(Calendar.DATE, 1);
    }
    return dates;
}

and use it as below

    List<Date> dates = getDates("2012-02-01", "2012-03-01");
    for(Date date:dates)
        System.out.println(date);