android - Change the step size of a NumberPicker

Question

Is it possible to do that in a more convenient way than handling it in the OnScrollListener event? Pity it doesn't have a step size attribute...

Answer 1

The NumberPicker in Android has a method called setDisplayedValues. You can use this one to show custom values (it takes an array of Strings) and then map them when you need the value. So if you need steps of 5 in an minute picker, for example, you can create an array like this:

String[] minuteValues = new String[12];

for (int i = 0; i < minuteValues.length; i++) {
    String number = Integer.toString(i*5);
    minuteValues[i] = number.length() < 2 ? "0" + number : number;
}

minutePicker.setDisplayedValues(minuteValues);

And then when you get the value in the OnValueChangeListener, you just need to cast it back to an integer:

Integer.parseInt(minuteValues[newVal]);