2d绘图

        canvas.drawCircle(30,30,30,getPaintStoke(Color.RED));
        canvas.drawCircle(100,30,30,getPaintFill(Color.BLACK));
//        canvas.drawPoint(30,90,getPaintStoke(Color.RED));
        canvas.drawLine(50,90,180,100,getPaintFill(Color.BLUE));

        float[] pts={
                50,100,180,110,
                180,110,200,120,
                200,120,180,130
        };
        canvas.drawLines(pts,getPaintFill(Color.GRAY));
        canvas.drawRect(30,140,300,200,getPaintStoke(Color.GREEN));
        canvas.drawRoundRect(30,210,300,280,45,45,getPaintFill(Color.RED));
        canvas.drawRoundRect(330,210,600,280,45,45,getPaintStoke(Color.BLUE));

        canvas.drawArc(30,300,300,370,80,80,false,getPaintStoke(Color.RED));
        canvas.drawArc(330,300,600,370,80,80,false,getPaintFill(Color.RED));

        canvas.drawArc(30,380,300,460,80,80,true,getPaintStoke(Color.RED));
        canvas.drawArc(330,380,600,460,80,80,true,getPaintFill(Color.RED));

        canvas.drawOval(30,480,300,540,getPaintStoke(Color.GREEN));
        canvas.drawOval(330,480,600,540,getPaintFill(Color.GREEN));

        canvas.drawText("测试文本",30,560,getPaintFill(Color.BLACK));

        canvas.drawPosText("htc",new float[]{30,580,50,600,80,620},getPaintFill(Color.BLACK));

        Path path = new Path();
        path.moveTo(50,50);
        path.lineTo(100,100);
        path.lineTo(100,300);
        path.lineTo(300,50);
        canvas.drawPath(path,getPaintStoke(Color.BLACK));

        //先创建两个大小一样的路径
//第一个逆向生成
        Path CCWRectpath = new Path();
        RectF rect1 =  new RectF(50, 640, 240, 750);
        CCWRectpath.addRect(rect1, Path.Direction.CCW);

//第二个顺向生成
        Path CWRectpath = new Path();
        RectF rect2 =  new RectF(290, 640, 480, 750);
        CWRectpath.addRect(rect2, Path.Direction.CW);

        Paint paint = getPaintFill(Color.BLACK);

//先画出这两个路径
        canvas.drawPath(CCWRectpath, paint);
        canvas.drawPath(CWRectpath, paint);

//依据路径写出文字
        String text="风萧萧兮易水寒，壮士一去兮不复返";
        paint.setColor(Color.GRAY);
        paint.setTextSize(35);
        canvas.drawTextOnPath(text, CCWRectpath, 0, 18, paint);//逆时针生成
        canvas.drawTextOnPath(text, CWRectpath, 0, 18, paint);//顺时针生成