Pinch zoom on SurfaceView

Instead of using SurfaceView, use TextureView which has more features and is preferred over SurfaceView. See TextureView Documentation

---

Your code is indeed right and should work but in some cases, The MediaPlayer drawn on the SurfaceView does not resize and makes an illusion of the zoom happening at the position 0,0 of the phone. If you set a size smaller than the parent for the SurfaceView and set a background for the parent, you will notice this

---

SOLUTION IN CODE

Sample Project: Pinch Zoom

The project extends the TextureView and implements the touch to create the zoom effect.

IMAGE: DEMONSTRATION