hello. say i have a table view, that will show a text and a icon on it. the list of the table is am xml file, which includes a text and a image link for each cell. click on the cell to navigate to second detailed level. i saw many apps implemented this. first show a place holder icon, and then update it when the actual one finishes downloading. could someone tell me how to do this? the general pattern. i wrote one and ended up crashing easily.