Yes, that's why I recommended ARGB_8888, and linked to Romain's excellent explanation of the different Configs. But sometimes you can't afford the memory for ARGB_8888 for large Bitmaps, which is why I was using RGB_565 in the first place. And ARGB_4444 looks fine for some images, so in such a case - and if you need the alpha channel - it can still be the best choice.
Bottom line: pay attention to which Config you're using. String On Monday, July 16, 2012 1:31:27 PM UTC+2, Fran wrote: > > ARGB_4444 is discouraged in google development docs as it produces very > poor quality with some bitmaps. And I have checked that it is true. If > you have a bitmap with a gradient or something similar, it will look > really crappy with ARGB_4444. > > > On 16/07/12 12:37, String wrote: > > Okay, I'll say right up front, there's no good reason why you should be > > doing this. If your PNG has an alpha-channel, what are you doing loading > it > > using a config that doesn't support it? > > > > Nonetheless, I was doing this in one of my apps; the PNGs had > transparency > > for historical reasons, but I'd been loading them using RGB_565 to save > > memory (the loss in quality wasn't important in this case). And prior to > > Jelly Bean, this worked fine, but in 4.1 it failed silently. It appeared > to > > work, but the resultant bitmap was unusable; saving it to SD for > debugging > > yielded a 0-length file. > > > > The solution is simple: either remove the alpha-channel from your PNG, > or > > load it with a different Config, one that supports transparency. If you > can > > spare the RAM, ARGB_8888 is generally the best choice > > (see https://plus.google.com/u/0/111962077049890418486/posts/Ytar76F56y5). > > > Or if memory's tight, ARGB_4444 will still work, and uses the same > > 16bytes/pixel as RGB_565. > > > > String > > > > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
