how to control the bitmap rotate base on the touch position?
my program like http://androidforums.com/application-development/50507-rotate-text-touch.html
the bitmap needle at the center, the user touch different position, the bitmap will rotate and point to the touch position. the bitmap not move, only rotate.
how can i make it??
how can i calculate the coordinate degree?
i need this technology for my homework,thank you.
my program like http://androidforums.com/application-development/50507-rotate-text-touch.html
the bitmap needle at the center, the user touch different position, the bitmap will rotate and point to the touch position. the bitmap not move, only rotate.
how can i make it??
how can i calculate the coordinate degree?
i need this technology for my homework,thank you.
