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    <p>As far as I understood your question, you can try to do something like that:</p> <pre><code>// this const is 24 hours in milliseconds: 24 hours in day, 60 min. in one hour, 60 sec. in one min., 1000 ms. in one sec. private static final int TWENTY_FOUR_HOURS = 24 * 60 * 60 * 1000; //... Date dateYouChose; Date dateYouChosePlus50Days = new Date(dateYouChose.getTime() + (50 * TWENTY_FOUR_HOURS)); </code></pre> <p><strong>Updated:</strong></p> <p>So, maybe it will be good for you (but be careful, I did not test this code, maybe I made a mistake in something):</p> <pre><code>final DatePicker datePicker; final Button btnDisplayCelebrationTimes; final TextView txtDatePlus50; final TextView txtDatePlus100; // ... btnDisplayCelebrationTimes.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final SimpleDateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy"); final GregorianCalendar gregorianCalendar; gregorianCalendar = new GregorianCalendar(datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth()); gregorianCalendar.add(Calendar.DAY_OF_MONTH, 50); final Date datePlus50 = gregorianCalendar.getTime(); txtDatePlus50.setText(dateFormat.format(datePlus50)); gregorianCalendar = new GregorianCalendar(datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth()); gregorianCalendar.add(Calendar.DAY_OF_MONTH, 100); final Date datePlus100 = gregorianCalendar.getTime(); txtDatePlus100.setText(dateFormat.format(datePlus100)); } }); </code></pre>
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    1. POCalculate 50 days in date picker
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    1. USIgor Tyulkanov
    1. USIgor Tyulkanov
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    1. COHi I need to create an app named 'Time to celebrate'. 1. Gets a date input from the user. ( The date might be some birthday, or marriage, or some important event) 2. On click of a button with text "Display Celebration times", then it should display the following from the given date a. 50th day (e.g. If the given date is 03-06-2013, then add 50 days and display the 50th day will be xx-xx-xxxx) b. 100th, 200th, 1 year, 500th, 1000 till 2000 till 5000th date I have a doubt in ur above code dateYouChose shouldnt tht be a obj of datepicker as i am getting date from the userthrodatepicker
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    2. COsee my updated answer
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