Android利用canvas畫各類圖形(點、直線、弧、圓、橢圓、文字、矩形、多邊形、曲線、圓角矩形)

一、首先說一下canvas類： 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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