private String fromDate;
private DatePickerDialog fromDatePicker;
private DatePickerDialog.OnDateSetListener fromDatePickerListener;
private Calendar fromDateCalendar;
private String toDate;
private DatePickerDialog toDatePicker;
private DatePickerDialog.OnDateSetListener toDatePickerListener;
private Calendar toDateCalendar;

fromDateCalendar = Calendar.getInstance();
    fromDatePickerListener = new DatePickerDialog.OnDateSetListener() {

    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear,
                          int dayOfMonth) {
        // TODO Auto-generated method stub
        fromDateCalendar.set(Calendar.YEAR, year);
        fromDateCalendar.set(Calendar.MONTH, monthOfYear);
        fromDateCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);

        fromDate = fromDateCalendar.get(Calendar.YEAR) + "-" +
  (fromDateCalendar.get(Calendar.MONTH)+1) + "-" +
   fromDateCalendar.get(Calendar.DAY_OF_MONTH);
        //etFromDate.setText(fromDate);

toDatePicker.getDatePicker().setMinDate(fromDateCalendar.getTimeInMillis());
    }

};

toDateCalendar = Calendar.getInstance();
 toDatePickerListener = new DatePickerDialog.OnDateSetListener() {

    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear,
                          int dayOfMonth) {
        // TODO Auto-generated method stub
        toDateCalendar.set(Calendar.YEAR, year);
        toDateCalendar.set(Calendar.MONTH, monthOfYear);
        toDateCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);

        toDate = toDateCalendar.get(Calendar.YEAR) + "-" +
 (toDateCalendar.get(Calendar.MONTH)+1) + "-" +
  toDateCalendar.get(Calendar.DAY_OF_MONTH);
        //etToDate.setText(toDate);
    }

 };


toDatePicker = new DatePickerDialog(getContext(),toDatePickerListener,
toDateCalendar.get(Calendar.YEAR), toDateCalendar.get(Calendar.MONTH),
toDateCalendar.get(Calendar.DAY_OF_MONTH));

fromDatePicker = new DatePickerDialog(getContext(),fromDatePickerListener,
fromDateCalendar.get(Calendar.YEAR), fromDateCalendar.get(Calendar.MONTH),
fromDateCalendar.get(Calendar.DAY_OF_MONTH));

textviewFrom.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            fromDatePicker.getDatePicker().setMaxDate(new Date().getTime());

            fromDatePicker.show();
        }
    });
    textviewTo.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            toDatePicker.getDatePicker().setMaxDate(new Date().getTime());
            toDatePicker.show();
        }
    });

fromDatePicker.getDatePicker().setMaxDate(toDateCalendar.get‌​TimeInMillis());

toDatePickerListener = new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                              int dayOfMonth) {
            // TODO Auto-generated method stub
            toDateCalendar.set(Calendar.YEAR, year);
            toDateCalendar.set(Calendar.MONTH, monthOfYear);
            toDateCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);

            toDate = toDateCalendar.get(Calendar.YEAR) + "-" +
                    (toDateCalendar.get(Calendar.MONTH)+1) + "-" +
                    toDateCalendar.get(Calendar.DAY_OF_MONTH);
            fromdatePicker.setMaxDate(toDateCalendar.getTimeInMillis());
            //etToDate.setText(toDate);
        }

    };

pickerDialog.getDatePicker().setMaxDate(maxTime);// Set Max and min here
pickerDialog.show();