Android利用canvas画各类图形(点、直线、弧、圆、椭圆、文字、矩形、多边形、曲线、圆角矩形)

一、首先说一下canvas类： Class Overview The Canvas class holds the "draw" calls. To draw something, you need 4 basic components: A Bitmap to hold the pixels, a Canvas to host the draw calls (writing into the b

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