canvas.rotate(degrees)与canvas.rotate(degrees, px, py)

canvas.save();mPaint.setColor(Color.YELLOW);mPaint.setStyle(Style.STROKE);canvas.drawCircle(150, 70, 5, mPaint);canvas.restore();canvas.save();//canvas.rotate(40.0f);//这个方法是将整个画布旋转，起点是按照当前画布计算位置的canvas.rotate(270.0f, 150, 70);//这个方法是将整个画布旋转，起点位置还是之前画布里面的150，70 点/* 设置颜色及绘制另一个矩形 */mPaint.setColor(Color.GREEN);canvas.drawRect(new Rect(150, 75, 260, 120), mPaint);canvas.restore();