Calendar cal1 = getCalendarFromDate(mStartDate);long startTime = cal1.getTimeInMillis();Calendar cal2 = getCalendarFromDate(mEndDate);long endTime = cal2.getTimeInMillis();int numberOfDays = (int)(endTime - startTime)/(24 * 60 * 60 * 1000);/*** @param date format is 2012-9-18* @return Calendar value is after set date's value*/private Calendar getCalendarFromDate(final String date) {    int year = 0;    int month = 0;    int day = 0;    try {      String[] array = date.split("-");      int[] arrayInt = new int[array.length];      for (int i = 0; i < array.length; i++) {        arrayInt[i] = Integer.parseInt(array[i]);        if(i == 0) {          year = arrayInt[0];        } else if(i == 1){          month = arrayInt[1];        } else if(i == 2){          day = arrayInt[2];        }      }    } catch (Exception e) {      e.printStackTrace();    }    Calendar cal = Calendar.getInstance();    if(year > 0 && month >= 0 && day >= 0) {      cal.set(year, month, day);    }    return cal;}