Seems there have been a lot of questions regarding the selection model
for the spinner (ie - no OnItemClicked, only OnItemSelected listeners,
making it difficult to use callbacks which respond to 'final' item
selection and not every 'browsing' selection in between). Most
proposed solutions to this involve catching key events etc... has
anyone come up with anything better than this?
As I sit here (without my eclipse IDE, so I can't try it myself :( )
I'm wondering if it isn't possible to detect the state of the spinner
(ie - expanded as drop-down, vs collapsed 'left-right/up-down'
selection). I'm assuming we can do this by taking advantage of the
'state' methods available for the View class and the
'state_dropdown_showing' constant mentioned in issue 330 (are these
applicable/supported in this instance?)
Presumably we might have something like this for a Spinner object
named 's':
// s.setOnItemSelectedListener(new
Spinner.OnItemSelectedListener(){
// public void onItemSelected(AdapterView parent, View
v, int position, long id) {
// int[] state = v.getDrawableState();
// for(int i=0; i<state.length; i++){
// if(state[i]==R.attr.stat_dropdown_showing){
// // just bail because we want to ignore
this 'browsing' selection...
// return;
// }
// }
// // assuming that we're not showing a dropdown,
do callback on fired selection
// // (presumably this is a 'left-right/keyup-
keydown' selection)
// doCallback();
// }
//
// public void onNothingSelected(AdapterView arg0) {
// // do nothing
// }
// });
Has anybody tried this? I'd be curious to know if it might work...
I'm assuming that there's a risk here of losing the selection we're
actually trying to get while the dropdown is open since presumably the
OnItemSelected event fires while the View's state has the drop-down
showing, even for the final selection... but I think that's wouldn't
be too difficult to overcome if the rest of it will work...
Any Android wizards out there who care to comment on the idea? Am I
out in left field or does this have a chance of working?
Suggestions welcome...
Thanks
Todd
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