List all weeks,months and year in JAVA/Android

-1

Is it possible to list the all weeks/date given two date range for example:

Date from 1/1/2013 to 1/1/2020
result will be:

1-7,2013

8-14,2013

15-21,2013 and soon til 2020 and same with month.

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

asked Nov 20 '18 at 2:53

Hard Harry Nadela

4

sure, go for it. Let us know of any errors / problems you encounter

– Scary Wombat
Nov 20 '18 at 2:54

Honestly, i have no idea on how to do this part, still searching for a reference similar to my problem.

– Hard Harry Nadela
Nov 20 '18 at 2:58

well weeks, months, year sounds like a calendar to me. Hmm maybe search for java calendar ?

– Scary Wombat
Nov 20 '18 at 2:59

Ahh okay okay, i also search similar like calendar but i have no idea upon getting the dates and range of the weeks, like 1-7,2013 and soon.

– Hard Harry Nadela
Nov 20 '18 at 3:03

Reference: Oracle Tutorial: Date Time

– Ole V.V.
Nov 20 '18 at 9:43

|
show 1 more comment

-1

Is it possible to list the all weeks/date given two date range for example:

Date from 1/1/2013 to 1/1/2020
result will be:

1-7,2013

8-14,2013

15-21,2013 and soon til 2020 and same with month.

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

asked Nov 20 '18 at 2:53

Hard Harry Nadela

4

sure, go for it. Let us know of any errors / problems you encounter

– Scary Wombat
Nov 20 '18 at 2:54

Honestly, i have no idea on how to do this part, still searching for a reference similar to my problem.

– Hard Harry Nadela
Nov 20 '18 at 2:58

well weeks, months, year sounds like a calendar to me. Hmm maybe search for java calendar ?

– Scary Wombat
Nov 20 '18 at 2:59

Ahh okay okay, i also search similar like calendar but i have no idea upon getting the dates and range of the weeks, like 1-7,2013 and soon.

– Hard Harry Nadela
Nov 20 '18 at 3:03

Reference: Oracle Tutorial: Date Time

– Ole V.V.
Nov 20 '18 at 9:43

|
show 1 more comment

-1

Is it possible to list the all weeks/date given two date range for example:

Date from 1/1/2013 to 1/1/2020
result will be:

1-7,2013

8-14,2013

15-21,2013 and soon til 2020 and same with month.

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

asked Nov 20 '18 at 2:53

Hard Harry Nadela

Is it possible to list the all weeks/date given two date range for example:

Date from 1/1/2013 to 1/1/2020
result will be:

1-7,2013

8-14,2013

15-21,2013 and soon til 2020 and same with month.

java android

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

asked Nov 20 '18 at 2:53

Hard Harry Nadela

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

asked Nov 20 '18 at 2:53

Hard Harry Nadela

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

edited Nov 20 '18 at 5:55

cricket_007

80.2k1142110

asked Nov 20 '18 at 2:53

Hard Harry Nadela

asked Nov 20 '18 at 2:53

Hard Harry Nadela

asked Nov 20 '18 at 2:53

Hard Harry Nadela

4

sure, go for it. Let us know of any errors / problems you encounter

– Scary Wombat
Nov 20 '18 at 2:54

Honestly, i have no idea on how to do this part, still searching for a reference similar to my problem.

– Hard Harry Nadela
Nov 20 '18 at 2:58

well weeks, months, year sounds like a calendar to me. Hmm maybe search for java calendar ?

– Scary Wombat
Nov 20 '18 at 2:59

Ahh okay okay, i also search similar like calendar but i have no idea upon getting the dates and range of the weeks, like 1-7,2013 and soon.

– Hard Harry Nadela
Nov 20 '18 at 3:03

Reference: Oracle Tutorial: Date Time

– Ole V.V.
Nov 20 '18 at 9:43

|
show 1 more comment

4

sure, go for it. Let us know of any errors / problems you encounter

– Scary Wombat
Nov 20 '18 at 2:54

Honestly, i have no idea on how to do this part, still searching for a reference similar to my problem.

– Hard Harry Nadela
Nov 20 '18 at 2:58

well weeks, months, year sounds like a calendar to me. Hmm maybe search for java calendar ?

– Scary Wombat
Nov 20 '18 at 2:59

Ahh okay okay, i also search similar like calendar but i have no idea upon getting the dates and range of the weeks, like 1-7,2013 and soon.

– Hard Harry Nadela
Nov 20 '18 at 3:03

Reference: Oracle Tutorial: Date Time

– Ole V.V.
Nov 20 '18 at 9:43

sure, go for it. Let us know of any errors / problems you encounter

– Scary Wombat
Nov 20 '18 at 2:54

Honestly, i have no idea on how to do this part, still searching for a reference similar to my problem.

– Hard Harry Nadela
Nov 20 '18 at 2:58

well weeks, months, year sounds like a calendar to me. Hmm maybe search for java calendar ?

– Scary Wombat
Nov 20 '18 at 2:59

Ahh okay okay, i also search similar like calendar but i have no idea upon getting the dates and range of the weeks, like 1-7,2013 and soon.

– Hard Harry Nadela
Nov 20 '18 at 3:03

Reference: Oracle Tutorial: Date Time

– Ole V.V.
Nov 20 '18 at 9:43

|
show 1 more comment

2 Answers
2

active

oldest

votes

Please try out this for the case of weeks(check if you can optimize).

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    // to provide month range dynamically



    Calendar calendar = Calendar.getInstance();

    Date minDate = calendar.getTime();

    calendar.add(Calendar.MONTH, 5); // current month + 5 months calendar

    Date maxDate = calendar.getTime();

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");

    String startDate = dateFormat.format(minDate);

    String endDate = dateFormat.format(maxDate);



    List<Date> dates = getDates(startDate, endDate); // to get dates between range

    int prevIdentifier = 0;

    int identifier;

    String initDate, finalDate;

    List<WeekDay> weekDays = getListOfWeeksFromListOfDates(dates); 

    SimpleDateFormat dformatter = new SimpleDateFormat("dd");

    SimpleDateFormat yformatter = new SimpleDateFormat("yyyy");

    initDate = dformatter.format(weekDays.get(0).getDate());

    finalDate = dformatter.format(weekDays.get(0).getDate());

    String outputData = "";

    for (WeekDay weekDay : weekDays) {

        identifier = Integer.parseInt(weekDay.getWeekIdentifier()); // this value will be same for all days in same week

        if (prevIdentifier != 0 && identifier != prevIdentifier) {

            if (outputData.equalsIgnoreCase(""))

                outputData += initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            else

                outputData += "  *  " + initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            initDate = dformatter.format(weekDay.getDate());

        } else {

            finalDate = dformatter.format(weekDay.getDate());

        }

        prevIdentifier = identifier;

    }

    System.out.println("OUTPUT DATA :" + outputData);



}



 public List<WeekDay> getListOfWeeksFromListOfDates(List<Date> listOfDates) {

    List<WeekDay> listOfWeeks = new ArrayList<>();

    WeekDay weekDay;

    for (Date date : listOfDates) {

        weekDay = new WeekDay(date, new SimpleDateFormat("w").format(date));

        listOfWeeks.add(weekDay);

    }

    return listOfWeeks;

}



public class WeekDay {



    Date date;

    String weekIdentifier;



    public WeekDay(Date Date, String WeekIdentifier) {

        this.date = Date;

        this.weekIdentifier = WeekIdentifier;

    }



    public Date getDate() {

        return date;

    }



    public String getWeekIdentifier() {

        return weekIdentifier;

    }



}



private static List<Date> getDates(String dateString1, String dateString2) {

    ArrayList<Date> dates = new ArrayList<Date>();

    DateFormat df1 = new SimpleDateFormat("dd/MM/yyyy");



    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;

}

edited Nov 20 '18 at 6:00

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

You are using the badly designed and long outdated date and time classes (Calendar, Date, SimpleDateFormat and DateFormat). Today we have so much better in java.time, the modern Java date and time API. While someone might use the old-fashioned classes, please at least mention that there is an option of a better solution. One can use java.time on not new Android, you will just need ThreeTenABP.

– Ole V.V.
Nov 20 '18 at 9:49

This was something similar I have used in previous works and I am not familiar with the new update. So I mentioned to "check if he can optimize". Thanks for your update @OleV.V.

– Pooja Rajendran C
Nov 20 '18 at 10:18

add a comment |

java.time

I would use a LocalDate for start date (e.g., 1/1/2013) and one for end date (1/1/2020). To represent the period you want (week, month or year) I might use either the appropriate ChronoUnit constant or — more flexibly — a Period. The mentioned classes are from java.time, the modern Java date and time API. A pretty simple loop will iterate through your start dates (Jan 1, Jan 8, Jan 15, etc.). Subtract 1 from each start date (except the first) to get the end dates (Jan 8 minus 1 day gives Jan 7, etc.). Happy coding. And as Scary Wombat already said, if you have any problems, please ask a different and better question here.

Question: Can I use `java.time` on Android?

Yes, java.time works nicely on Android devices. It just requires at least Java 6.

In Java 8 and later and on new Android devices (from API level 26, I’m told) the new API comes built-in.

In Java 6 and 7 get the ThreeTen Backport, the backport of the new classes (ThreeTen for JSR 310, where the modern API was first described).

On (older) Android, use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. Make sure you import the date and time classes from package org.threeten.bp and subpackages.

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

Please try out this for the case of weeks(check if you can optimize).

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    // to provide month range dynamically



    Calendar calendar = Calendar.getInstance();

    Date minDate = calendar.getTime();

    calendar.add(Calendar.MONTH, 5); // current month + 5 months calendar

    Date maxDate = calendar.getTime();

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");

    String startDate = dateFormat.format(minDate);

    String endDate = dateFormat.format(maxDate);



    List<Date> dates = getDates(startDate, endDate); // to get dates between range

    int prevIdentifier = 0;

    int identifier;

    String initDate, finalDate;

    List<WeekDay> weekDays = getListOfWeeksFromListOfDates(dates); 

    SimpleDateFormat dformatter = new SimpleDateFormat("dd");

    SimpleDateFormat yformatter = new SimpleDateFormat("yyyy");

    initDate = dformatter.format(weekDays.get(0).getDate());

    finalDate = dformatter.format(weekDays.get(0).getDate());

    String outputData = "";

    for (WeekDay weekDay : weekDays) {

        identifier = Integer.parseInt(weekDay.getWeekIdentifier()); // this value will be same for all days in same week

        if (prevIdentifier != 0 && identifier != prevIdentifier) {

            if (outputData.equalsIgnoreCase(""))

                outputData += initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            else

                outputData += "  *  " + initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            initDate = dformatter.format(weekDay.getDate());

        } else {

            finalDate = dformatter.format(weekDay.getDate());

        }

        prevIdentifier = identifier;

    }

    System.out.println("OUTPUT DATA :" + outputData);



}



 public List<WeekDay> getListOfWeeksFromListOfDates(List<Date> listOfDates) {

    List<WeekDay> listOfWeeks = new ArrayList<>();

    WeekDay weekDay;

    for (Date date : listOfDates) {

        weekDay = new WeekDay(date, new SimpleDateFormat("w").format(date));

        listOfWeeks.add(weekDay);

    }

    return listOfWeeks;

}



public class WeekDay {



    Date date;

    String weekIdentifier;



    public WeekDay(Date Date, String WeekIdentifier) {

        this.date = Date;

        this.weekIdentifier = WeekIdentifier;

    }



    public Date getDate() {

        return date;

    }



    public String getWeekIdentifier() {

        return weekIdentifier;

    }



}



private static List<Date> getDates(String dateString1, String dateString2) {

    ArrayList<Date> dates = new ArrayList<Date>();

    DateFormat df1 = new SimpleDateFormat("dd/MM/yyyy");



    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;

}

edited Nov 20 '18 at 6:00

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

You are using the badly designed and long outdated date and time classes (Calendar, Date, SimpleDateFormat and DateFormat). Today we have so much better in java.time, the modern Java date and time API. While someone might use the old-fashioned classes, please at least mention that there is an option of a better solution. One can use java.time on not new Android, you will just need ThreeTenABP.

– Ole V.V.
Nov 20 '18 at 9:49

This was something similar I have used in previous works and I am not familiar with the new update. So I mentioned to "check if he can optimize". Thanks for your update @OleV.V.

– Pooja Rajendran C
Nov 20 '18 at 10:18

add a comment |

Please try out this for the case of weeks(check if you can optimize).

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    // to provide month range dynamically



    Calendar calendar = Calendar.getInstance();

    Date minDate = calendar.getTime();

    calendar.add(Calendar.MONTH, 5); // current month + 5 months calendar

    Date maxDate = calendar.getTime();

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");

    String startDate = dateFormat.format(minDate);

    String endDate = dateFormat.format(maxDate);



    List<Date> dates = getDates(startDate, endDate); // to get dates between range

    int prevIdentifier = 0;

    int identifier;

    String initDate, finalDate;

    List<WeekDay> weekDays = getListOfWeeksFromListOfDates(dates); 

    SimpleDateFormat dformatter = new SimpleDateFormat("dd");

    SimpleDateFormat yformatter = new SimpleDateFormat("yyyy");

    initDate = dformatter.format(weekDays.get(0).getDate());

    finalDate = dformatter.format(weekDays.get(0).getDate());

    String outputData = "";

    for (WeekDay weekDay : weekDays) {

        identifier = Integer.parseInt(weekDay.getWeekIdentifier()); // this value will be same for all days in same week

        if (prevIdentifier != 0 && identifier != prevIdentifier) {

            if (outputData.equalsIgnoreCase(""))

                outputData += initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            else

                outputData += "  *  " + initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            initDate = dformatter.format(weekDay.getDate());

        } else {

            finalDate = dformatter.format(weekDay.getDate());

        }

        prevIdentifier = identifier;

    }

    System.out.println("OUTPUT DATA :" + outputData);



}



 public List<WeekDay> getListOfWeeksFromListOfDates(List<Date> listOfDates) {

    List<WeekDay> listOfWeeks = new ArrayList<>();

    WeekDay weekDay;

    for (Date date : listOfDates) {

        weekDay = new WeekDay(date, new SimpleDateFormat("w").format(date));

        listOfWeeks.add(weekDay);

    }

    return listOfWeeks;

}



public class WeekDay {



    Date date;

    String weekIdentifier;



    public WeekDay(Date Date, String WeekIdentifier) {

        this.date = Date;

        this.weekIdentifier = WeekIdentifier;

    }



    public Date getDate() {

        return date;

    }



    public String getWeekIdentifier() {

        return weekIdentifier;

    }



}



private static List<Date> getDates(String dateString1, String dateString2) {

    ArrayList<Date> dates = new ArrayList<Date>();

    DateFormat df1 = new SimpleDateFormat("dd/MM/yyyy");



    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;

}

edited Nov 20 '18 at 6:00

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

You are using the badly designed and long outdated date and time classes (Calendar, Date, SimpleDateFormat and DateFormat). Today we have so much better in java.time, the modern Java date and time API. While someone might use the old-fashioned classes, please at least mention that there is an option of a better solution. One can use java.time on not new Android, you will just need ThreeTenABP.

– Ole V.V.
Nov 20 '18 at 9:49

This was something similar I have used in previous works and I am not familiar with the new update. So I mentioned to "check if he can optimize". Thanks for your update @OleV.V.

– Pooja Rajendran C
Nov 20 '18 at 10:18

add a comment |

Please try out this for the case of weeks(check if you can optimize).

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    // to provide month range dynamically



    Calendar calendar = Calendar.getInstance();

    Date minDate = calendar.getTime();

    calendar.add(Calendar.MONTH, 5); // current month + 5 months calendar

    Date maxDate = calendar.getTime();

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");

    String startDate = dateFormat.format(minDate);

    String endDate = dateFormat.format(maxDate);



    List<Date> dates = getDates(startDate, endDate); // to get dates between range

    int prevIdentifier = 0;

    int identifier;

    String initDate, finalDate;

    List<WeekDay> weekDays = getListOfWeeksFromListOfDates(dates); 

    SimpleDateFormat dformatter = new SimpleDateFormat("dd");

    SimpleDateFormat yformatter = new SimpleDateFormat("yyyy");

    initDate = dformatter.format(weekDays.get(0).getDate());

    finalDate = dformatter.format(weekDays.get(0).getDate());

    String outputData = "";

    for (WeekDay weekDay : weekDays) {

        identifier = Integer.parseInt(weekDay.getWeekIdentifier()); // this value will be same for all days in same week

        if (prevIdentifier != 0 && identifier != prevIdentifier) {

            if (outputData.equalsIgnoreCase(""))

                outputData += initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            else

                outputData += "  *  " + initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            initDate = dformatter.format(weekDay.getDate());

        } else {

            finalDate = dformatter.format(weekDay.getDate());

        }

        prevIdentifier = identifier;

    }

    System.out.println("OUTPUT DATA :" + outputData);



}



 public List<WeekDay> getListOfWeeksFromListOfDates(List<Date> listOfDates) {

    List<WeekDay> listOfWeeks = new ArrayList<>();

    WeekDay weekDay;

    for (Date date : listOfDates) {

        weekDay = new WeekDay(date, new SimpleDateFormat("w").format(date));

        listOfWeeks.add(weekDay);

    }

    return listOfWeeks;

}



public class WeekDay {



    Date date;

    String weekIdentifier;



    public WeekDay(Date Date, String WeekIdentifier) {

        this.date = Date;

        this.weekIdentifier = WeekIdentifier;

    }



    public Date getDate() {

        return date;

    }



    public String getWeekIdentifier() {

        return weekIdentifier;

    }



}



private static List<Date> getDates(String dateString1, String dateString2) {

    ArrayList<Date> dates = new ArrayList<Date>();

    DateFormat df1 = new SimpleDateFormat("dd/MM/yyyy");



    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;

}

edited Nov 20 '18 at 6:00

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

Please try out this for the case of weeks(check if you can optimize).

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    // to provide month range dynamically



    Calendar calendar = Calendar.getInstance();

    Date minDate = calendar.getTime();

    calendar.add(Calendar.MONTH, 5); // current month + 5 months calendar

    Date maxDate = calendar.getTime();

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");

    String startDate = dateFormat.format(minDate);

    String endDate = dateFormat.format(maxDate);



    List<Date> dates = getDates(startDate, endDate); // to get dates between range

    int prevIdentifier = 0;

    int identifier;

    String initDate, finalDate;

    List<WeekDay> weekDays = getListOfWeeksFromListOfDates(dates); 

    SimpleDateFormat dformatter = new SimpleDateFormat("dd");

    SimpleDateFormat yformatter = new SimpleDateFormat("yyyy");

    initDate = dformatter.format(weekDays.get(0).getDate());

    finalDate = dformatter.format(weekDays.get(0).getDate());

    String outputData = "";

    for (WeekDay weekDay : weekDays) {

        identifier = Integer.parseInt(weekDay.getWeekIdentifier()); // this value will be same for all days in same week

        if (prevIdentifier != 0 && identifier != prevIdentifier) {

            if (outputData.equalsIgnoreCase(""))

                outputData += initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            else

                outputData += "  *  " + initDate + "-" + finalDate + "," + yformatter.format(weekDay.getDate());

            initDate = dformatter.format(weekDay.getDate());

        } else {

            finalDate = dformatter.format(weekDay.getDate());

        }

        prevIdentifier = identifier;

    }

    System.out.println("OUTPUT DATA :" + outputData);



}



 public List<WeekDay> getListOfWeeksFromListOfDates(List<Date> listOfDates) {

    List<WeekDay> listOfWeeks = new ArrayList<>();

    WeekDay weekDay;

    for (Date date : listOfDates) {

        weekDay = new WeekDay(date, new SimpleDateFormat("w").format(date));

        listOfWeeks.add(weekDay);

    }

    return listOfWeeks;

}



public class WeekDay {



    Date date;

    String weekIdentifier;



    public WeekDay(Date Date, String WeekIdentifier) {

        this.date = Date;

        this.weekIdentifier = WeekIdentifier;

    }



    public Date getDate() {

        return date;

    }



    public String getWeekIdentifier() {

        return weekIdentifier;

    }



}



private static List<Date> getDates(String dateString1, String dateString2) {

    ArrayList<Date> dates = new ArrayList<Date>();

    DateFormat df1 = new SimpleDateFormat("dd/MM/yyyy");



    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;

}

edited Nov 20 '18 at 6:00

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

edited Nov 20 '18 at 6:00

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

answered Nov 20 '18 at 5:54

Pooja Rajendran C

197210

You are using the badly designed and long outdated date and time classes (Calendar, Date, SimpleDateFormat and DateFormat). Today we have so much better in java.time, the modern Java date and time API. While someone might use the old-fashioned classes, please at least mention that there is an option of a better solution. One can use java.time on not new Android, you will just need ThreeTenABP.

– Ole V.V.
Nov 20 '18 at 9:49

This was something similar I have used in previous works and I am not familiar with the new update. So I mentioned to "check if he can optimize". Thanks for your update @OleV.V.

– Pooja Rajendran C
Nov 20 '18 at 10:18

add a comment |

You are using the badly designed and long outdated date and time classes (Calendar, Date, SimpleDateFormat and DateFormat). Today we have so much better in java.time, the modern Java date and time API. While someone might use the old-fashioned classes, please at least mention that there is an option of a better solution. One can use java.time on not new Android, you will just need ThreeTenABP.

– Ole V.V.
Nov 20 '18 at 9:49

This was something similar I have used in previous works and I am not familiar with the new update. So I mentioned to "check if he can optimize". Thanks for your update @OleV.V.

– Pooja Rajendran C
Nov 20 '18 at 10:18

You are using the badly designed and long outdated date and time classes (Calendar, Date, SimpleDateFormat and DateFormat). Today we have so much better in java.time, the modern Java date and time API. While someone might use the old-fashioned classes, please at least mention that there is an option of a better solution. One can use java.time on not new Android, you will just need ThreeTenABP.

– Ole V.V.
Nov 20 '18 at 9:49

This was something similar I have used in previous works and I am not familiar with the new update. So I mentioned to "check if he can optimize". Thanks for your update @OleV.V.

– Pooja Rajendran C
Nov 20 '18 at 10:18

add a comment |

java.time

Question: Can I use `java.time` on Android?

Yes, java.time works nicely on Android devices. It just requires at least Java 6.

In Java 8 and later and on new Android devices (from API level 26, I’m told) the new API comes built-in.

In Java 6 and 7 get the ThreeTen Backport, the backport of the new classes (ThreeTen for JSR 310, where the modern API was first described).

On (older) Android, use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. Make sure you import the date and time classes from package org.threeten.bp and subpackages.

java.time

Question: Can I use `java.time` on Android?

Yes, java.time works nicely on Android devices. It just requires at least Java 6.

In Java 8 and later and on new Android devices (from API level 26, I’m told) the new API comes built-in.

In Java 6 and 7 get the ThreeTen Backport, the backport of the new classes (ThreeTen for JSR 310, where the modern API was first described).

On (older) Android, use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. Make sure you import the date and time classes from package org.threeten.bp and subpackages.

java.time

Question: Can I use `java.time` on Android?

Yes, java.time works nicely on Android devices. It just requires at least Java 6.

In Java 8 and later and on new Android devices (from API level 26, I’m told) the new API comes built-in.

In Java 6 and 7 get the ThreeTen Backport, the backport of the new classes (ThreeTen for JSR 310, where the modern API was first described).

On (older) Android, use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. Make sure you import the date and time classes from package org.threeten.bp and subpackages.

java.time

Question: Can I use `java.time` on Android?

Yes, java.time works nicely on Android devices. It just requires at least Java 6.

In Java 8 and later and on new Android devices (from API level 26, I’m told) the new API comes built-in.

In Java 6 and 7 get the ThreeTen Backport, the backport of the new classes (ThreeTen for JSR 310, where the modern API was first described).

On (older) Android, use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. Make sure you import the date and time classes from package org.threeten.bp and subpackages.

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