Need help with a custom Spinner/ArrayAdapter setup

Posted by MisterSquonk on Stack Overflow See other posts from Stack Overflow or by MisterSquonk
Published on 2010-12-29T02:50:40Z Indexed on 2010/12/29 2:53 UTC
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android

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arrayadapter

I have a WeatherSpinner class which extends Spinner. The class shows region names which I originally did using an ArrayAdapter<String> but I now want to use ArrayAdapter<Locale>(Locale is an abstract 'empty' class of my own).

I'm getting a ClassCastException when trying to populate my ArrayAdapter with the following...

protected ArrayList<?> theList;
protected ArrayAdapter<Locale> aa = null;
...
protected void updateContents(ArrayList<?> list, int selectedItem) {
    theList = list;
    // Exception thrown on next line
    aa = new ArrayAdapter<Locale>(theContext, android.R.layout.simple_spinner_item,
        (Locale[]) theList.toArray());
    ...

}

I'm passing a RegionList object into updateContents() as the 'list' parameter and RegionList extends ArrayList<Region>, and Region extends Locale. I've also overriden Region's toString() method to return a valid String.

What am I not seeing here? Am I wrong about the way ArrayList<?>.toArray() works?

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