`drawCircle（）`半径参数单位？

Question

Canvas.drawCircle()方法中radius参数的单位是什么？

是像素吗？还是蘸？

http://developer.android.com/reference/android/graphics/Canvas.html#drawCircle(float，float，float，android.graphics.Paint）

我试着查看源代码以查看是否可以获得任何想法，但该方法只是一个包装器，并且文档没有指定任何内容。

Answer 1

正如official docs中所述：

bbb

根据定义，位图使用像素，而不使用其他任何内容。

因此，所有When you're writing an application in which you would like to perform specialized drawing and/or control the animation of graphics, you should do so by drawing through a Canvas. A Canvas works for you as a pretense, or interface, to the actual surface upon which your graphics will be drawn — it holds all of your "draw" calls. Via the Canvas, your drawing is actually performed upon an underlying Bitmap, which is placed into the window.方法都在 px 。