Retrieves thumbnail data for the drawable identified by this.
The thumbnail will be not larger than the requested size.
| this |
the drawable |
| width |
the requested thumbnail width (<= 1024 pixels) |
| height |
the requested thumbnail height (<= 1024 pixels) |
| actual_width |
the resulting thumbnail's actual width |
| actual_height |
the resulting thumbnail's actual height |
| bpp |
the bytes per pixel of the returned thubmnail data |
|
thumbnail data or null if this is invalid. |