A few pointers that I've «borrowed» from the Barcode Scanner application:
Ditch taking pictures. Use the camera preview. While much lower
resolution, the preview can handle many more frames per second, that
enhances the success rate dramatically.
Consider following the Barcode Scanner's main view layout idea: have
the camera preview run on a background surface that takes up the whole
screen, and set up controls overlaying it.
I urge you not to blindly copy Barcode Scanner's code, but read and
learn from it.
However... 3 days is barely enough to get you started. Have patience.
2010/12/21 Sergio Luceno <sluc...@gmail.com>: