2D学习之Canvas

代码看来很多人的，最后发现还是这段代码比较全

try {

canvas = sfh.lockCanvas();

if (canvas != null) {

// ----设置画布绘图无锯齿

canvas.setDrawFilter(pfd);

// ----利用填充画布，刷屏

canvas.drawColor(Color.BLACK);

// ----绘制文本

canvas.drawText("drawText", 10, 10, paint);

// ----绘制像素点

canvas.drawPoint(10, 20, paint);

// ----绘制多个像素点

canvas.drawPoints(new float[] { 10, 30, 30, 30 }, paint);

// ----绘制直线

canvas.drawLine(10, 40, 50, 40, paint);

// ----绘制多条直线

canvas.drawLines(

new float[] { 10, 50, 50, 50, 70, 50, 110, 50 }, paint);

// ----绘制矩形

canvas.drawRect(10, 60, 40, 100, paint);

// ----绘制矩形2

Rect rect = new Rect(10, 110, 60, 130);

canvas.drawRect(rect, paint);

canvas.drawRect(rect, paint);

// ----绘制圆角矩形

RectF rectF = new RectF(10, 140, 60, 170);

canvas.drawRoundRect(rectF, 20, 20, paint);

// ----绘制圆形

canvas.drawCircle(20, 200, 20, paint);

// ----绘制弧形

canvas.drawArc(new RectF(150, 20, 200, 70), 0, 230, true, paint);

// ----绘制椭圆

canvas.drawOval(new RectF(150, 80, 180, 100), paint);

// ----绘制指定路径图形

Path path = new Path();

// 设置路径起点

path.moveTo(160, 150);

// 路线1

path.lineTo(200, 150);

// 路线2

path.lineTo(180, 200);

// 路径结束

path.close();

canvas.drawPath(path, paint);

// ----绘制指定路径图形

Path pathCircle = new Path();

// 添加一个圆形的路径

pathCircle.addCircle(130, 260, 20, Path.Direction.CCW);

// ----绘制带圆形的路径文本

canvas.drawTextOnPath("PathText", pathCircle, 10, 20, paint);

}

} catch (Exception e) {

// TODO: handle exception

} finally {

if (canvas != null)

sfh.unlockCanvasAndPost(canvas);

}