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之前学过了简单工厂模式，工厂方法模式，简单工厂在创建的时候，需要传入一个识别符，然后返回相应的实例。而工厂方法在需要的时候，创建相应的工厂类，获得相应的实例。

抽象工厂模式（Abstract Factory）：提供一个创建一系列相关或互相依赖的接口，而无需指定它们具体的类。

看看UML类图

基本代码

/// 
    /// 抽象产品A    /// 
    public abstract class Car    {        public abstract void Run();    }

/// 
    /// 抽象产品B    /// 
    public interface IBus    {        void Run();    }

/// 
    /// 实体产品A1    /// 
   public class BMWCar:Car    {        public override void Run()        {            Console.WriteLine("宝马轿车在行驶！");        }    }

/// 
    /// 实体产品A2    /// 
    public class BenzCar:Car    {        public override void Run()        {            Console.WriteLine("奔驰轿车在行驶！");        }    }

/// 
    /// 实体产品B1    /// 
    public class BMWBus : IBus    {        public void Run()        {            Console.WriteLine("宝马大汽车");        }    }

/// 
    /// 实体产品B2    /// 
    public class BenzBus : IBus    {        public void Run()        {            Console.WriteLine("奔驰大汽车");        }    }

/// 
    /// 抽象工厂    /// 
    public abstract class AbstractFactory    {        public static AbstractFactory CreateFactory(string strType)        {            AbstractFactory factory = null;            switch (strType)            {                case "BMW":                    factory = new BMWFactory();                    break;                case "Benz":                    factory = new BenzFactory();                    break;            }            return factory;        }        /// 
        /// 抽象方法 创建Car对象        /// 
        /// 
           public abstract Car CreateCar();        /// 
        /// 创建BUS        /// 
        /// 
           public abstract IBus CreateBus();    }

/// 
    /// 实体工厂1    /// 
   public class BMWFactory:AbstractFactory    {        public override Car CreateCar()        {            return new BMWCar();        }        public override IBus CreateBus()        {            return new BMWBus();        }    }

/// 
    /// 实体工厂2    /// 
    public class BenzFactory : AbstractFactory    {        public override Car CreateCar()        {            return new BenzCar();        }        public override IBus CreateBus()        {            return new BenzBus();        }    }

package com.abings.abstractfactory;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import com.abings.abstractfactory.AbstractFactory.Bus;import com.abings.abstractfactory.AbstractFactory.Car;import com.abings.abstractfactory.AbstractFactory.IFactory;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //宝马工厂        IFactory iFactory = IFactory.createFactory("Bwm");        //奔驰工厂        IFactory iFactory1 = IFactory.createFactory("Benz");        //宝马系列的公交和汽车        Bus bus = iFactory.createBus();        Car car = iFactory.createCar();        //出厂测试        bus.run();        car.run();        //奔驰系列        Bus bus1 = iFactory1.createBus();        Car car1 = iFactory1.createCar();        //出厂测试        car1.run();        bus1.run();    }}

代码git: