Android provides Date and Time Picker dialog, user can select appropriate date and time as per his need.

With DatePickerDialog we can select date, month and year using Calendar class. setMaxDate(long maxDate) and setMinDate(long minDate) methods supports maximal and minimal date. DatePickerDialog.OnDateSetListener interface to receive a callback when the user sets the date.

btnDate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final Calendar c = Calendar.getInstance();
                year = c.get(Calendar.YEAR);
                month = c.get(Calendar.MONTH);
                day = c.get(Calendar.DAY_OF_MONTH);

                DatePickerDialog dpd = new DatePickerDialog(CreateEventActivity.this,
                        new DatePickerDialog.OnDateSetListener() {

                            @Override
                            public void onDateSet(DatePicker view, int year,
                                                  int monthOfYear, int dayOfMonth) {
                                c.set(Calendar.YEAR, year);
                                c.set(Calendar.MONTH, month);
                                c.set(Calendar.DAY_OF_MONTH, day);

                                String format = new SimpleDateFormat("E, MMM d, yyyy").format(c.getTime());

                                tvDate.setText(format);

                            }
                        }, year, month, day);
                dpd.show();
            }
        });

Similarly, hour and minute will be selected using TimePickerDialog. Implement the TimePickerDialog.OnTimeSetListener interface to receive a callback when the user sets the time.

btnTime.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            final Calendar c = Calendar.getInstance();
            hour = c.get(Calendar.HOUR_OF_DAY);
            min = c.get(Calendar.MINUTE);

            TimePickerDialog tpd = new TimePickerDialog(CreateEventActivity.this,
                    new TimePickerDialog.OnTimeSetListener() {

                        @Override
                        public void onTimeSet(TimePicker view, int hourOfDay,
                                              int minute) {
                            // Calling a getTime function for hour and minute of the day according to the 0-12 formate with AM, PM meridiem

                            String timeString = getTime(minute, hourOfDay);
                            if (timeString != null) {
                                tvTime.setText(timeString);
                            } else {
                                // Please select time
                                Toast.makeText(getApplicationContext(), getResources().getString(R.string.time_msg), Toast.LENGTH_LONG).show();
                            }

                        }
                    }, hour, min, false);
            tpd.show();
        }
    });

To Get Hour and Minute in a proper formate as AM and PM.

public String getTime(int min, int hour) {
    String timeSet = null;

    if (hour > 12) {
        hour = hour-12;
        timeSet = "PM";
    } else if (hour == 0) {
        hour = hour+12;
        timeSet = "AM";
    } else if (hour == 12)
        timeSet = "PM";
    else
        timeSet = "AM";

    String Minute = null;

    if (min < 10)
        Minute = "0" + min;
    else
        Minute = String.valueOf(min);

    String aTime = new StringBuilder().append(hour).append(':')
            .append(min).append(" ").append(timeSet).toString();
    return aTime;
}