近来研究Android,发现里面有ScaleGestureDetector,竟然没有RotateGestureDetector。只能搜索到第三方的:
通过Guesture方法实现Rotate
https://github.com/Almeros/android-gesture-detectors
直接再View上实现Rotate
https://github.com/MikeOrtiz/TouchImageView
https://github.com/jasonpolites/gesture-imageview
https://github.com/codepanda-ch/android-gestureimageview
官方的Scale例子
http://developer.android.com/training/gestures/scale.html