事件侦听器添加到形状，android.graphics包 [英] Add event listeners to shapes in android.graphics package

问题描述

我是新到Android编程和放大器;我试图创建一个简单的程序，我可以处理拖放放大器;触摸不同形状的事件。

I am new to android programming & I'm trying to create a simple program where I can handle drag & touch events on different shapes.

从Android API，我明白，这是很容易事件侦听器添加小部件（如：ImageView的）。但我怎么做同样的图形，如RectF或圆？

From the android API, I understand that it is easy to add event listeners to widgets(eg:ImageView). But how do I do the same for graphics such as RectF or Circle?

由于我是新手，我会AP preciate，如果有人可以解释更简单的条款。

Since I'm a novice, I would appreciate if someone could explain in simpler terms.

推荐答案

喜欢的 OnClickListeners 只能被添加到查看类。

Things like OnClickListeners can only be added to subsets of the View class.

不过，对于形状等，您可以覆盖你的基地布局onTouch（）方法。然后在 MotionEvent.ACTION_DOWN 你得到触摸点的坐标，看看他们是否与您的任何形状的相交。如果它的形状相交，然后用户点击了形状，和C你需要，你可以实现任何$ C $。

However, for shapes etc. you can override the onTouch() method for your base layout. Then in MotionEvent.ACTION_DOWN you get the coordinates of the touch point, and see if they intersect with any of your shapes. If it intersects with a shape, then the user clicked that shape, and you can implement whatever code you need to.

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