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在Android中绘制基本的集合图形，本程序就是自定义一个View组件，程序重写该View组件的onDraw(Canvase)方法，然后在该Canvas上绘制大量的基本的集合图形。

直接上代码：

1.自定义的View组件代码：

package com.infy.configuration;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.LinearGradient;import android.graphics.Paint;import android.graphics.Path;import android.graphics.RectF;import android.graphics.Shader;import android.util.AttributeSet;import android.view.View;public class MyView extends View{	public MyView(Context context, AttributeSet attrs) {		super(context, attrs);	}	@Override	protected void onDraw(Canvas canvas) {		// TODO Auto-generated method stub		super.onDraw(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);		//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);                //绘制圆角的矩形        RectF re31 = new RectF();        canvas.drawRoundRect(re31, 15, 15, paint);                //绘制椭圆        RectF re32 =new RectF();        canvas.drawOval(re32, paint);                //根据Path,绘制三角形        Path path5 = new Path();        path5.moveTo(170, 340);        path5.lineTo(230, 340);        path5.lineTo(200, 290);        path5.close();        canvas.drawPath(path5, paint);                //根据PAth,进行绘制五角形        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();        canvas.drawPath(path6, paint);       	}}

定义一个ZiDingYiViewTes的Activity：

package com.infy.configuration;import android.app.Activity;import android.os.Bundle;public class ZiDingYiViewTes extends Activity{		private MyView myView =null;	@Override	protected void onCreate(Bundle savedInstanceState) {		// TODO Auto-generated method stub		super.onCreate(savedInstanceState);				myView = new MyView(this, null);				setContentView(myView);			}}

最后附上效果图(多了一个椭圆)：