It depends on the region you're trying to view. Does the same happen on a web browser? Many areas (especially in Asia and high-end residential zones) have requested Google to remove satellite and/or Street Views of their areas. If the view you're trying to display is a military-protected zone, it may be blacked out or only visible at low detail (top level eagle eye only, can't zoom in). Also, not all areas are available at all zoom levels. Try zooming out and seeing if the areas you're missing appear.