Android image gradient Processing

Http://stackoverflow.com/questions/8417608/awful-background-image-quality-in-android/8417703#8417703

First of all, make sure that your original image looks good so you're not just getting the problem from there.
Then, in your oncreate () method, do:

Code1:

 
Getwindow().Setformat(Pixelformat.Rgba_8888);Getwindow().Addflags(Windowmanager.Layoutparams.Flag_dither);
 

And to load your image explicitly as a 32-bit image (RGBA-8888 configuration) Add the following where you load your views:

Code2:

 Bitmapfactory  .  Options  Options  =     New     Bitmapfactory  .  Options  ();  Options  .  Inpreferredconfig  =     Bitmap .  Config  .  Argb_8888  ;    Bitmap  Gradient  =     Bitmapfactory  .  Decoderesource  (  Getresources  (),  R  .  Drawable  .  Gradient  , Options  );  Findviewbyid  (  R  .  ID  .  Main  ).  Setbackgrounddrawable  (  New     Bitmapdrawable  (  Gradient  )); 

Comparison between different approaches :( these are all screenshots from the resulting application)

my source images (64 colors to the left, 24 bit to the right):
image1 and image2:
1: raw 64-color image (image1) set as background from layout XML:
2: the same image (image1 ), using code1 :
3: The same image (image1) using both code1 and code2 :
4: image2, loaded with code1 and code2 (in this case the dithering is not really important as both the source and destination use 8 bits per color):