android - MotionEvent.ACTION_MOVE 正在圆周方向移动

Question

如何查找 onTouch 中的 MotionEvent.ACTION_MOVE 是否已进行圆周运动？请帮忙

Answer 1

Recognizing a circle only with MotionEvent.ACTION_MOVE is too much work. There is a package that helps you in that issue: android.gesture.

Take a look here: http://developer.android.com/reference/android/gesture/package-summary.html

You can also check the Gestures Builder sample app included in the samples directory of your SDK.

Lars Vogel has a nice tutorial in this topic: http://www.vogella.com/articles/AndroidGestures/article.html

Hope that helps.

Cheers