canvas中怎么绘制一个扇形?四分之一圆.答://画一个起始角度为45度,结束角度为90度,绘图方向顺时针的填充扇形 DrawSector(canvas,Math.PI/4,Math.PI/2,50,true,false);//画一个起始角度为-90度,结束角度为-135度,绘图方向逆时针的未填充扇形 DrawSector(canvas,-Math.PI/2,-Math.PI*3/4,50,false,true);</script> ...
android canvas.drawcircle 为什么画不出圆答:mPaint.setStyle(Paint.Style.STROKE); //空心效果 canvas.drawCircle(50, 50, 10, mPaint); //绘制圆形 canvas.drawCircle(100, 100, 20, mPaint); //绘制圆形 canvas.drawCircle(150, 150, 30, mPaint); //绘制圆形 canvas.drawCircle(200, 200, 40, mPaint); //绘...