android绘制几何图形的实例代码

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）：

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。