Canvas canvas =new Canvas();
//-------设置画笔无锯齿
Paint paint1 =new Paint();
canvas.drawCircle(40,30,20, paint1);
paint1.setAntiAlias(true);
canvas.drawCircle(100,30,20, paint1);
//-------设置画笔的透明度
canvas.drawText("无透明度",100,70,newPaint());
Paint paint2 =new Paint();
paint2.setAlpha(0x77);
canvas.drawText("半透明",20,70, paint2);
//-------设置绘制文本的锚点
canvas.drawText("锚点",20,90,newPaint());
//设置以文本的中心点绘制
Paint paint3 =new Paint();
paint3.setTextAlign(Paint.Align.CENTER);
canvas.drawText("锚点",20,105, paint3);
//-------获取文本的长度
Paint paint4 =new Paint();
floatlen = paint4.measureText("文本宽度");
canvas.drawText("文本长度："+ len,20,130,newPaint());
//-------设置画笔的样式
canvas.drawRect(newRect(20,140,40,160),newPaint());
Paint paint5 =new Paint();
//设置不填充
paint5.setStyle(Paint.Style.STROKE);
canvas.drawRect(newRect(60,140,80,160), paint5);
//-------设置画笔颜色
Paint paint6 =new Paint();
paint6.setColor(Color.GRAY);
canvas.drawText("灰色",30,180, paint6);
//-------设置画笔的粗细程度
canvas.drawLine(20,200,70,200,newPaint());
Paint paint7 =new Paint();
paint7.setStrokeWidth(7);
canvas.drawLine(20,220,70,220, paint7);
//-------设置画笔绘制文字的字体粗细
Paint paint8 =new Paint();
paint8.setTextSize(20);
canvas.drawText("文字尺寸",20,260, paint8);
//-------设置画笔的ARGB分量
Paint paint9 =new Paint();
paint9.setARGB(0x77,0xff,0x00,0x00);
canvas.drawText("红色半透明",20,290, paint9);
