How to add :00 to NumberPicker in Android?

Question

I have a NumberPicker which should represent hours. How can I add the :00 after the number? Or is there another way? Here's the code:

hourPicker.setDescendantFocusability(NumberPicker.FOCUS_BLOCK_DESCENDANTS);
    hourPicker.setMinValue(rightNow.get(Calendar.HOUR_OF_DAY) + 2);
    hourPicker.setMaxValue(23);
    hourPicker.setWrapSelectorWheel(false);

EDIT:

You want to set :00 after you have picked an hour from the picker, right? — Todor Kostov, Jul 08 '16 at 10:05
So that the user can only pick hours like 15:00 / 16:00 / 10:00 etc.? — Todor Kostov, Jul 08 '16 at 10:13
When it starts the user should see 8:00 and so on until 23:00 — jlively, Jul 08 '16 at 10:18

score 1 · Answer 1 · edited May 23 '17 at 12:32

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According to this answer, there is no direct way to restrict or disable the subviews of a TimePicker. You can copy the code from the Android SDK and try to edit it in a way useful for you, but that won't be an usual behavior for such a widget.

The other way is to allow the user to pick whatever time he/she wants and show an error message after the time selection, stating the the selected hour is wrong.

EDIT: Please, refer to this question. Check out the answer with the most votes.

edited May 23 '17 at 12:32

Community

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answered Jul 08 '16 at 10:25

Todor Kostov

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Thank you for your answer, but I am not using TimePicker. I am using NumberPicker because I only needed to show hours. Now, everything works fine, but I get numbers like this "8,9,12,13,14". I would like to somehow format them so :00 is added to all of them. Check my edited answer for a screenshot. – jlively Jul 08 '16 at 10:32
So on the left picker you have a date and on the right one you have and hour, right? And you just want to add :00 after the right picker? – Todor Kostov Jul 08 '16 at 10:38
I want the add the :00 in the right picker, not after it. So basically, instead of 8 I want it to be 8:00. – jlively Jul 08 '16 at 10:46
Yes, this way I can hard code the numbers, but I can't make the min value to get the current hour and add +2. :( Maybe it has to do something with the .setFormatter but I can't seem to make it work. – jlively Jul 08 '16 at 11:04
Did you set **min/maxValue()**? – Todor Kostov Jul 08 '16 at 11:15
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/116794/discussion-between-jlively-and-todor-kostov). – jlively Jul 08 '16 at 11:25

score 1 · Answer 2 · answered May 28 '17 at 07:53

Maybe you can do this like so:

String[] displayedValues  = new String[15];//23-8=15, so lenght needed is 15

for(int i=0; i<16; i++){
    displayedValues[i] = String.valueOf(8+i)+":00";//gives 8:00 for i=0 till 23:00 for i=15
}

and than

hourPicker.setDisplayedValues(displayedValues);

How to add :00 to NumberPicker in Android?

2 Answers2