Events not catched on real device using Activity.dispatch<EventType>

by Marco Nelissen » Mon, 13 Apr 2009 00:03:08 GMT

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thanks for the information..Android is really doing great on my board..

On Thu, Jan 15, 2009 at 10:54 PM, <


2. Saving/Loading dynamic Bitmaps

Ok, I have to post again, because what appears to have worked before
only did if the alpha channel of the bitmap was mostly opaque.

All I need is to save and load a bitmap inside a file of my own
format. I don't really care what format the bitmap data itself has, as
long as 100% of the data in the bitmap is restored on load, including
the alpha channel. I have now spent several days trying to achieve
what should be a very simple thing.

Bitmap.getPixels clearly does not return the raw bitmap data, at least
not for an 8888 format. The color channels are modified based on the
alpha in some way. Bitmap.copyPixelsToBuffer seems to return better
results, but there is no equivalent Bitmap.copyPixelsFromBuffer to
restore the bitmap on load, and using Bitmap.setPixels to restore
gives a blueish tint.

I thought of playing some trick where I would get the pixels, copy out
the alpha component to my own storage, set the alpha to 0xFF
everywhere on the bitmap, and then read the color out. But that
doesn't seem to work either. The color channels are different, but
still not correct. Pixels with a low alpha value are darker then what
they should be. A pixel that was set to 20% opaque white comes back as
20% opaque blackish.

I am really at a loss as to what I can possibly do to properly extract
and restore the exact state of a bitmap.


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