Future date should not set in DatePicker dialog in android.

            int y = Integer.parseInt(String.valueOf(year));
            int m = Integer.parseInt(String.valueOf(monthOfYear+1));
            int d = Integer.parseInt(String.valueOf(dayOfMonth));
            if(y > currentYear)
            {
                Toast.makeText(SleepView.this, "Please select proper date.", Toast.LENGTH_LONG).show();
            }
            else if(m > currentMonth && y == currentYear)
            {
                Toast.makeText(SleepView.this, "Please select proper date.", Toast.LENGTH_LONG).show();
            }
            else if(d > currentDay && y == currentYear&& m == currentMonth)
            {
                Toast.makeText(SleepView.this, "Please select proper date.", Toast.LENGTH_LONG).show();
            }