手势类Gesture大汇总

手势类的监测，以及与手势监测相关的监听器类：GestureDetector

• GestureDetector.OnContextClickListener： The listener that is used to notify when a context click occurs.
• GestureDetector.OnDoubleTapListener： The listener that is used to notify when a double-tap or a confirmed single-tap occur.
• GestureDetector.OnGestureListener 监听器类，负责对用户的手势行为提供响应 The listener that is used to notify when gestures occur.
• GestureDetector.SimpleOnGestureListener ：A convenience class to extend when you only want to listen for a subset of all the gestures.

除了监测Android自带的手势之外，还允许开发者将用户手势添加到指定文件中。当用户下次再次画出该手势时，系统将可识别该手势。
GestureOverlayView，手势编辑组件，用户再组件上绘制手势。
GestureOverlayView有三个监听器接口：

*      GestureOverlayView.OnGestureListener
*      GestureOverlayView.OnGesturePerformedListener
*      GestureOverlayView.OnGesturingListener

GestureLibrary手势库，GestureLibraries用来创建手势库。

GestureStroke: A gesture stroke started on a touch down and ended on a touch up. A stroke consists of a sequence of timed points. One or multiple strokes form a gesture.一划，严格的定义就是一系列有时间先后的点。

Gesture.Prediction对象有两个属性，name属性代表了匹配的手势名，score属性代表了手势的相似度。