Breakthrough

After remaining baffled for a while that I couldn't get my Android Jade app to display anything, I discovered:

• by a roundabout route, without ever finding out what had been wrong, how to display and change a background of a different size to the original image;
• how to move a sprite over it (with transparency);
• how to detect touches and flings on the touch screen;
• how to detect and compensate for changes in orientation;
• how to superimpose a diagnostic display.

I now, therefore, have a framework on which to build the various functions from Bridge. The apk (application package) even works on the Xoom.