imageview - How to resize,rotate image in android over other image or view through touch -

i working on application has background image let imageocean(image1) , want put image on let imageshark(image2) want put shark on spot user has put shark on ocean using touch. not put shark want zoom in , zoom out. saw this link , has zoom in/out, movement no rotations. need rotation too.

i have nothing share because starting , have no idea how accomplish it. please share me link of tutorial or source code.

edit

i found rotation in it. question how can values of x,y , there size after getting zoom

rotate multitouch not easy in android, lots of code have written in order make work nicely. suggest use existing library.here