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Canvas

/ 文发表于2016-07-07 17:55 第次阅读 canvas

Canvas

//把整张画布绘制成白色
canvas.drawColor(Color.WHITE);
Paint paint = new Paint();
//去锯齿
paint.setAntiAlias(true);
paint.setColor(Color.BLUE);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(3);
//绘制圆形
canvas.drawCircle(40, 40, 30, paint);
//绘制正方形
canvas.drawRect(10, 80, 70, 140, paint);
//绘制矩形
canvas.drawRect(10, 150, 70, 190, paint);
RectF rel = new RectF(10,240,70,270);
//绘制椭圆
canvas.drawOval(rel, paint);
//定义一个Path对象，封闭一个三角形
Path path1 = new Path();
path1.moveTo(10, 340);
path1.lineTo(70, 340);
path1.lineTo(40, 290);
path1.close();
//根据Path进行绘制，绘制三角形
canvas.drawPath(path1, paint);
//定义一个Path对象，封闭一个五角星
Path path2 = new Path();
path2.moveTo(27, 360);
path2.lineTo(54, 360);
path2.lineTo(70, 392);
path2.lineTo(40, 420);
path2.lineTo(10, 392);
path2.close();
//根据Path进行绘制，绘制五角星
canvas.drawPath(path2, paint);
//设置填丛风格后进行绘制
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.RED);
canvas.drawCircle(120, 40, 30, paint);
//绘制正方形
canvas.drawRect(90, 80, 150, 140, paint);
//绘制矩形
canvas.drawRect(90, 150, 150, 190, paint);
//绘制圆角矩形
RectF re2 = new RectF(90,200,150,230);
canvas.drawRoundRect(re2, 15, 15, paint);
//绘制椭圆
RectF re21 = new RectF(90, 240, 150, 270);
canvas.drawOval(re21, paint);
Path path3 = new Path();
path3.moveTo(90, 340);
path3.lineTo(150, 340);
path3.lineTo(120, 290);
path3.close();
//绘制三角形
canvas.drawPath(path3,paint);
//绘制五角形
Path path4 = new Path();
path4.moveTo(106, 360);
path4.lineTo(134, 360);
path4.lineTo(150, 392);
path4.lineTo(120, 420);
path4.lineTo(90, 392);
path4.close();
canvas.drawPath(path4, paint);
//设置渐变器后绘制
//为Paint设置渐变器
Shader mShasder = new LinearGradient(0, 0, 40, 60, new int[]{Color.RED,Color.GREEN,Color.BLUE,Color.YELLOW}, null, Shader.TileMode.REPEAT);
paint.setShader(mShasder);
//设置阴影
paint.setShadowLayer(45, 10, 10, Color.GRAY);