本文实例为大家分享了android绘制几何图形展示的具体代码，供大家参考，具体内容如下
效果图：
代码（仅绘制类，不可直接运行）：
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public class myview extends view
{
public myview(context context, attributeset set)
{
super(context, set);
}
@override
// 重写该方法，进行绘图
protected void ondraw(canvas canvas)
{
super.ondraw(canvas);
// 把整张画布绘制成白色
canvas.drawcolor(color.white);
paint paint = new paint();//创建一个画笔对象
// 去锯齿
paint.setantialias(true);
paint.setcolor(color.blue);//设置画笔颜色为蓝色
paint.setstyle(paint.style.stroke);//设置样式
paint.setstrokewidth(3);//设置样式的宽度
// 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 re1 = new rectf(10, 200, 70, 230);
// 绘制圆角矩形
canvas.drawroundrect(re1, 15, 15, paint);
rectf re11 = new rectf(10, 240, 70, 270);
// 绘制椭圆
canvas.drawoval(re11, paint);
// 定义一个path对象，封闭成一个三角形。
path path1 = new path();
path1.moveto(10, 340);//将路径点设置到10，340位置
path1.lineto(70, 340);//将起始路径点连接都70,340位置
path1.lineto(40, 290);//将第二连接点连接到40,290位置
path1.close();//关闭路径的绘制
// 根据path进行绘制，绘制三角形
canvas.drawpath(path1, paint);
// 定义一个path对象，封闭成一个五角形。
path path2 = new path();
path2.moveto(26, 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，绘制五角形
canvas.drawpath(path2, paint);
// ----------设置填充风格后绘制----------
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);
rectf re2 = new rectf(90, 200, 150, 230);
//绘制圆角矩形
canvas.drawroundrect(re2, 15, 15, paint);
rectf re21 = new rectf(90, 240, 150, 270);
// 绘制椭圆
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);
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();
//绘制五角形
canvas.drawpath(path4, paint);
// ----------设置渐变器后绘制----------
// 为paint设置渐变器
shader mshader = new lineargradient(0, 0, 40, 60
, new int[] {
color.red, color.green, color.blue, color.yellow }
, null , shader.tilemode.repeat);
paint.setshader(mshader);
//设置阴影
paint.setshadowlayer(45 , 10 , 10 , color.gray);
// 绘制圆形
canvas.drawcircle(200, 40, 30, paint);
// 绘制正方形
canvas.drawrect(170, 80, 230, 140, paint);
// 绘制矩形
canvas.drawrect(170, 150, 230, 190, paint);
rectf re3 = new rectf(170, 200, 230, 230);
// 绘制圆角矩形
canvas.drawroundrect(re3, 15, 15, paint);
rectf re31 = new rectf(170, 240, 230, 270);
// 绘制椭圆
canvas.drawoval(re31, paint);
path path5 = new path();
path5.moveto(170, 340);
path5.lineto(230, 340);
path5.lineto(200, 290);
path5.close();
// 根据path进行绘制，绘制三角形
canvas.drawpath(path5, paint);
path path6 = new path();
path6.moveto(186, 360);
path6.lineto(214, 360);
path6.lineto(230, 392);
path6.lineto(200, 420);
path6.lineto(170, 392);
path6.close();
// 根据path进行绘制，绘制五角形
canvas.drawpath(path6, paint);
// ----------设置字符大小后绘制----------
paint.settextsize(24);
paint.setshader(null);
// 绘制7个字符串
canvas.drawtext(getresources().getstring(r.string.circle), 240, 50,
paint);
canvas.drawtext(getresources().getstring(r.string.square), 240, 120,
paint);
canvas.drawtext(getresources().getstring(r.string.rect), 240, 175,
paint);
canvas.drawtext(getresources().getstring(r.string.round_rect), 230,
220, paint);
canvas.drawtext(getresources().getstring(r.string.oval), 240,
260, paint);
canvas.drawtext(getresources().getstring(r.string.triangle), 240, 325,
paint);
canvas.drawtext(getresources().getstring(r.string.pentagon), 240, 390,
paint);
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
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