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There are a few possible reasons why the AdapterView.OnItemSelectedListener might be returning a null view:

1. The view might not have been inflated yet. If the view has not yet been inflated, it will be null when the OnItemSelectedListener is called. In this case, make sure that the view is inflated before the listener is set.

2. The view might have been garbage collected. If the view was previously created and then garbage collected, it will be null when the OnItemSelectedListener is called. In this case, make sure that the view is properly retained and not destroyed prematurely.

3. The view might not be bound to the data. If the view has not been bound to the data yet, it may be null when the listener is called. Make sure that the view is properly bound to the data before setting the OnItemSelectedListener.

4. There might be an error in the code. Make sure that there are no errors or typos in the code that might be causing the issue. Check the logcat for any error messages that might provide more information about the issue.