Spinner help

[boilermaker]

I am working on my first program in Android and have encountered a problem. I am using spinners to call up other layouts/windows and have been using onWindowFocusChanged. Every time I close the program or call up the menu to revert to the main screen it crashes with an error that says it has stopped unexpectedly.
I have been trying to figure this out for days now so any help would be appreciated.

[ickyfehmleh]

What do the logs say? From the Eclipse, get to the DDMS perspective, then click on the 'Logcat' tab. There should be an exception thrown and a stack trace.

[boilermaker]

the error says " uncaught handler: thread main exiting due to uncaught exception" then " java.lang.NullPointerException" and then it lists at locations. do you want those?

[ickyfehmleh]

If they're not making sense to you, sure, go ahead and post them.

[boilermaker]

most of them make sense, the majority have to deal with onWindowFocusChanged. Is there a better/other way to code when a spinner selection has been made besides this?

[ickyfehmleh]

The Spinner class supports a View.OnClickListener being set, have you tried that?

[Supernova]

most of them make sense, the majority have to deal with onWindowFocusChanged. Is there a better/other way to code when a spinner selection has been made besides this?

The onWindowFocusChanged documentation says this:

onWindowFocusChanged(boolean) Called when the window containing the view gains or loses focus.

I expect you have a listener to handle views gaining focus, but not the window losing focus? (for example when the menu appears, the menu will have focus)

The Spinner class supports a View.OnClickListener being set, have you tried that?

This is correct, if you want to listen to events on something then find the smallest listener that covers only that thing's events.

Something like this:

Spinner s = new Spinner(this);
s.setOnClickListener(new OnClickListener(){
    public void onClick(View v) {
                // do something                
    });

(Note define the spinner in xml, don't be naughty like me)

Whenever the spinner is clicked you will get the onClick method getting called, and v contains the view object that called it

Eg:
Log.d("spinner1",((Spinner)v).getSelectedItem().to String()); (not too useful but I don't know what class your data is.)