How to get the next date when click on button in android?

Question

In my application i have a text view to set the current date and two buttons for next date and previous date.

When click on next button i need to set the next date to text view without opening the date picker and similarly to previous button also.

Please can any one help me.

Answer 1

You could use the Calendar to get the current date . And then if you want the previous date you could use c.add(Calendar.DATE, -1) where -1 is the number of days you want to decrement from current date . In your case we want the previous date so used -1 .Similarly, to get the next date use c.add(Calendar.DATE, 1) . You can get the number of days previous or before just by altering the integer.

First of all to set current date to textview.

Calendar c = Calendar.getInstance();

System.out.println("Current time => " + c.getTime());

SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy");
String formattedDate = df.format(c.getTime());

textview.setText(formattedDate);

Then on previous button click:

previous.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                c.add(Calendar.DATE, -1);
                formattedDate = df.format(c.getTime());

                Log.v("PREVIOUS DATE : ", formattedDate);
                textview.setText(formattedDate);
             }
});

On Next Button click:

next.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                c.add(Calendar.DATE, 1);
                formattedDate = df.format(c.getTime());

                Log.v("NEXT DATE : ", formattedDate);
                textview.setText(formattedDate);
            }
});

Answer 2

Try this,

private static SimpleDateFormat  dateFormat  = new SimpleDateFormat("dd -MM-yyyy", Locale.US);

int dayShift = n; // Positive for next days, negative for previous days
Calendar c = Calendar.getInstance();
if (dayShift  != 0) {
        c.add(Calendar.DAY_OF_YEAR, dayShift);
}
mdate.setText(dateFormat.format(c.getTime());

Answer 3

Use the following code:

Calendar mCalendar  = new GregorianCalendar(year, month, day);
mCalendar.add(Calendar.DAY_OF_YEAR, 1);
Date mDate          = mCalendar.getTime();

start of by initializing you calendar, add mCalendar.add(Calendar.DAY_OF_YEAR, 1); or substract mCalendar.add(Calendar.DAY_OF_YEAR, -1); a day, get the current date, then format it to your needs