I have a spinner item bound to an array adapter which might have 0 or more items at any time. I want the spinner dropdown list to only show three items at a time, the rest of the items being scrollable. I have tried wrapping the spinner within a layout with a fixed width but the spinner drop down list still takes up the entire screen(if there are that many items in the array adapter) to display the list.
I was looking at the Spinner
source code and it seems like you can't do that with a spinner.
The Spinner
has its own private interface called SpinnerPopup
which defines how dropdown items can be shown. This is currently based on the spinnerMode
allowing for a dropdown or dialog list.
Both options are also implemented inside the Spinner
class as private classes: DialogPopup
and DropdownPopup
. Since you can't access them, it seems to me your only options at this point are:
Spinner
class which seems pretty self-contained and implement your version of a spinner with it, modifying whatever you like in it.I'm sorry I couldn't be of more help.
Good luck!
EDIT:
If you choose option 2, I think all you need to do is add your mode implementing the SpinnerPopup
interface. Then inside the constructor Spinner(Context context, AttributeSet attrs, int defStyle, int mode)
add another case
to the switch
checking for the modes to instantiate your own popup. Doesn't seem hard.
Here's the ultimately simple solution.. just copy this line in Spinner tag...
android:dropDownHeight="100dp" <!--change 100dp to your requirement-->
you can also modify width...
android:dropDownWidth="100dp" <!--change 100dp to your requirement-->
and you know what it works on
AutoCompleteTextView
too and with atleast api 16...
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