adapter.fill and progress bar

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When I initialize my app, I put up a "splash" screen with a progress bar
while the app fills its datasets. The fill takes longer sometimes than it
does other times. Is there anyway to measure/determine the progress of the
fill operation? I wish to know this so that I can adjust the progress bar
to be more realistic.

(Currently, the time to fill the datasets can range from 5 seconds to 20
seconds, even though the dataset size dows not vary very much.)

TIA


.

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