设计模式篇-工厂模式与代理模式的混用(Factory+proxy pattern )

本篇博客将介绍一个 工厂模式+ 代理模式 一起混合使用的 demo 此demo的需求
是一个弹弹球工厂， 产品 弹弹球 有 不同的颜色需求 工厂要满足 这些 需求
弹弹球 还有 单个创造 和 多个创造 下面我们来看代码实现吧

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球

首先我们先做个球

** * Created by hao on 2016/3/12. * 弹弹球 */public class BouncyBallView extends View {    private  Paint paint;    private Context context;    public int getBouncyBallColor() {        return bouncyBallColor;    }    public void setBouncyBallColor(int bouncyBallColor) {        this.bouncyBallColor = bouncyBallColor;        invalidate();    }    private int bouncyBallColor = Color.RED;    public BouncyBallView(Context context) {        super(context);    }    public BouncyBallView(Context context, AttributeSet attrs) {        super(context, attrs);        this.context = context ;        this.paint = new Paint();        this.paint.setAntiAlias(true);       // this.paint.setStyle(Paint.Style.FILL);    }    public BouncyBallView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        int center = getWidth()/2;        int innerCircle = dip2px(context,83);        int ringWidth = dip2px(context,5);        //绘制内圆        this.paint.setColor(bouncyBallColor);        canvas.drawCircle(center,center, center, this.paint);        Log.e("TAA","ondrow重绘");    }    /**     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)     */    public static int dip2px(Context context, float dpValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (dpValue * scale + 0.5f);    }}

产品类

先抽象出产品的基本功能
在区别子类再去实现不同的功能

/** * Created by hao on 2016/3/12. * 产品类 */public interface BouncyBall {    public void createBouncyBall(ViewGroup view);}/** * 黑色的球 */class BlackBouncyBall implements  BouncyBall{    @Override    public void createBouncyBall(ViewGroup view) {        View inflat =  View.inflate(view.getContext(),R.layout.layout_bouncyball,null);        ((BouncyBallView)inflat.findViewById(R.id.bouncyball)).setBouncyBallColor(Color.BLACK);        view.addView(inflat);    }}/** * 蓝色的球 */class BlueBouncyBall implements  BouncyBall{    @Override    public void createBouncyBall(ViewGroup view) {       View inflat =  View.inflate(view.getContext(),R.layout.layout_bouncyball,null);        ((BouncyBallView)inflat.findViewById(R.id.bouncyball)).setBouncyBallColor(Color.BLUE);      view.addView(inflat);    }}

工厂类

抽象出工厂的功能
返回产品的抽象类
区别出不同产品的工厂 方便以后扩展

public interface FactoryBouncyBall  {    BouncyBall getCreateBouncyBall();}class FactoryBlackBouncyBall implements  FactoryBouncyBall{    @Override    public BouncyBall getCreateBouncyBall() {        return new BlackBouncyBall();    }}class FactoryBlueBouncyBall implements  FactoryBouncyBall{    @Override    public BouncyBall getCreateBouncyBall() {        return new BlueBouncyBall();    }}

代理者

代理处理工厂
控制器只需要调用代理者的方法即可
代理者里面 有创建 单个球 和 多个球的方法

/** * Created by hao on 2016/3/12. * 弹弹球制造工厂的代理人 */public class BounctBallProxy {    public final static int BLACK_BOUNCTBALL = 1;    public final static int BLUE_BOUNCTBALL = 2;    public BounctBallProxy(ViewGroup viewGroup) {    }    /**     * 如果要对每个球进行修改 还可以添加 tag     *     * @param viewGroup     * @param bounctballKine     */    public static void createoBounctBall(ViewGroup viewGroup, int bounctballKine) {        BouncyBall start = null;        switch (bounctballKine) {            case BLACK_BOUNCTBALL:                start = new FactoryBlackBouncyBall().getCreateBouncyBall();                Log.e("TAA", "createoBounctBall--------BLACK");                break;            case BLUE_BOUNCTBALL:                start = new FactoryBlueBouncyBall().getCreateBouncyBall();                Log.e("TAA", "createoBounctBall--------BLUE");                break;        }        if (start != null) {            start.createBouncyBall(viewGroup);            Log.e("TAA", "createoBounctBall--------start-------");        }    }    /**     * 如果要对每个球进行修改 还可以添加 tag     * 创建多个     *     * @param viewGroup     * @param bounctballKine     */    public static void createoBounctBall(ViewGroup viewGroup, int bounctballKine, int num) {        for (int x = 0; x < num; x++) {            createoBounctBall(viewGroup, bounctballKine);        }    }}

调用

/** * 一个完整的弹弹球工厂 */public class Main2Activity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);//        ViewGroup group = (ViewGroup) getWindow().getDecorView().findViewById(android.R.id.content);        ViewGroup group = (ViewGroup) findViewById(R.id.main_id);        BounctBallProxy.createoBounctBall(group,BounctBallProxy.BLUE_BOUNCTBALL,10);    //    Log.e("TAA","Main2Activity--------");    }}

代码地址
供一起学习的小伙伴
https://github.com/mywanghao/twentythreemodule.git

欢迎大家提意见和补充

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