PNGs are based on vector graphics instead of raster graphics which
are used ny .jpeg, I don't think compression will work on vector
graphic files.Vector graphic files have there own compression , which
is based on graphic primitives instead of rasters/pixels. PNG's should
more fairly compact to begin with, which is one advantage of vector
formats
Mark
On Feb 26, 9:37 am, Rohit <mord...@gmail.com> wrote:
> Here is a PNG file that I was using for testing....
>
> http://www.lumbercartel.ca/fun/wallpaper/lumber_cartel_1_800x600.png
>
> Rohit
>
> On Feb 25, 5:21 pm, Rohit <mord...@gmail.com> wrote:
>
>
>
> > Has anyone seen failures from bitmap.compress() for PNG files?
>
> > I have a byte array that holds image data (read from a PNG file). I
> > have verified that the image can be displayed in an ImageView by
> > getting a bitmap as follows:
>
> > Bitmap bitmap = BitmapFactory.decodeByteArray(b, 0,
> > b.length);
>
> > Now, if I do
>
> > bitmap.compress(Bitmap.CompressFormat.PNG, 100,
> > fileoutputstream)
>
> > then the compress method returns me false and the file is not written.
> > I have a valid fileoutputstream.
>
> > If I start out with a JPEG image in the beginning instead of a PNG
> > then it seems to work fine. It just fails if it is a PNG image.
> > Initially I thought it was because my PNG file was in Indexed Color
> > Mode (checked it in Photoshop) but the problem persisted even if I
> > changed it to RGB Color mode.
>
> > Any clue what could be the problem?
>
> > If anyone has seen this please update the bug that I filed
> > :http://code.google.com/p/android/issues/detail?can=2&q=2092&colspec=I...-
> > Hide quoted text -
>
> - Show quoted text -
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