How to set minimum time to system current time from timepickerdialog

Question

I'm using a time picker dialog to select time but I lately observed that when user selects time it allows user to select the time that is already passed. Example: If the current date is 25-03-2020 and time is 5:00PM but time picker allows to select time below 5:00PM.

So how can I alert user to not select passed time of current date.

Answer 1

Thanks for everyone's help. But somehow i solved the issue with the following approach so i guess that will help future researchers to get a solution.

At first when user picks date from the date picker and sets date and selects time picker then it generates a date from simple date format and matches if the both dates are same. if yes then it starts check the time with another dateformat.

here is the code of it. I included everything from date picker.

 (Button_name_for_date_picker).setOnClickListener(view -> {
            Calendar calendar1 = Calendar.getInstance();
            int year = calendar1.get(Calendar.YEAR);
            int month = calendar1.get(Calendar.MONTH);
            int day = calendar1.get(Calendar.DAY_OF_MONTH);

            DatePickerDialog dialog = new DatePickerDialog(OrderConfirmationActivity.this,
                    dateSetListener, year, month, day);
            dialog.getDatePicker().setMinDate(System.currentTimeMillis() - 1000);
            dialog.getDatePicker().setMaxDate(System.currentTimeMillis() -1000 + (1000*60*60*24*7)); // This allows user to select a date range between a week
            dialog.show();
        });
        dateSetListener = (view, year, month, dayOfMonth) -> {
            month = month + 1;
            if (month < 10){
                String single_month = "0" + month;
                (String_name) = dayOfMonth + "/" + single_month + "/" + year;
                (Button_name).setText(AppointmentDate);
                Appoint_date.setTextColor(getResources().getColor(android.R.color.holo_green_light, getTheme()));
            }else{
                AppointmentDate = dayOfMonth + "/" + month + "/" + year;
                Appoint_date.setText(AppointmentDate);
                Appoint_date.setTextColor(getResources().getColor(android.R.color.holo_green_light, getTheme()));
            }

        };


        //This Generates AppointmentTime
        Appoint_time.setOnClickListener(view -> {
            Calendar calendar12 = Calendar.getInstance();
            final int hour = calendar12.get(Calendar.HOUR_OF_DAY);
            int minute = calendar12.get(Calendar.MINUTE);
            TimePickerDialog timePickerDialog = new TimePickerDialog(OrderConfirmationActivity.this, (timePicker, selected_hour, selected_minute) -> {
                SimpleDateFormat current_date = new SimpleDateFormat("dd/MM/yyyy", Locale.ENGLISH);
                String check = current_date.format(new Date());
                if (AppointmentDate.equals(check)){
                    SimpleDateFormat current_time = new SimpleDateFormat("HH", Locale.getDefault());
                    int check_hour = Integer.parseInt(current_time.format(new Date()));
                    String v = String.valueOf(future_time);
                    Toast.makeText(this, v, Toast.LENGTH_SHORT).show();
                    if (selected_hour < check_hour) {
                        future_time = 1;
                        String v1 = String.valueOf(future_time);
                        Toast.makeText(this, v1, Toast.LENGTH_SHORT).show();
                    }
                }

                if (selected_hour < 7){
                    time_check = 1;
                }else if (selected_hour >= 19){
                    time_check = 1;
                }

                if (selected_hour > 12) {
                    AppointmentTime = (selected_hour - 12) + ":" + selected_minute + " " + "PM";
                    Appoint_time.setText(AppointmentTime);
                } else if (selected_hour == 12) {
                    AppointmentTime = "12" + ":" + selected_minute + " " + "PM";
                    Appoint_time.setText(AppointmentTime);
                } else {
                    if (selected_hour != 0) {
                        AppointmentTime = selected_hour + ":" + selected_minute + " " + "AM";
                        Appoint_time.setText(AppointmentTime);
                    } else {
                        AppointmentTime = "12" + ":" + selected_minute + " " + "AM";
                        Appoint_time.setText(AppointmentTime);
                    }

                }
            }, hour, minute, false);
            timePickerDialog.show();
        });