构建者模式Builder

多一点真诚、多一点套路、少一点随意---  构建者模式Builder   

 

Android设计模式之建造者模式(Builder Pattern) 

http://blog.youkuaiyun.com/hp910315/article/details/49405311

package com.pattern.entity;

public class Person {//这个是Product
    private String name;
    private boolean sex;
    private int age;
    private float height;
    private float weight;


    public Person(String name, boolean sex, int age, float height, float weight) {
        this.name = name;
        this.sex = sex;
        this.age = age;
        this.height = height;
        this.weight = weight;
    }

    @Override
    public String toString() {
        return "Person{" +
                "age=" + age +
                ", name='" + name + '\'' +
                ", sex=" + sex +
                ", height=" + height +
                ", weight=" + weight +
                '}';
    }
}

package com.pattern.builder;

import com.pattern.entity.Person;

public interface Builder {//抽象建造接口
    public Builder setAge(int age);

    public Builder setHeight(float height);

    public Builder setName(String name);

    public Builder setSex(boolean sex);

    public Builder setWeight(float weight);

    public Person create();
}

package com.pattern.builder;

import com.pattern.entity.*;

public class ConcreteBuilder  implements Builder{//具体建造类
    private String name;
    private boolean sex;
    private int age;
    private float height;
    private float weight;

    public Builder setAge(int age) {
        this.age = age;
        return this;
    }

    public Builder setHeight(float height) {
        this.height = height;
        return this;
    }

    public Builder setName(String name) {
        this.name = name;
        return this;
    }

    public Builder setSex(boolean sex) {
        this.sex = sex;
        return this;
    }

    public Builder setWeight(float weight) {
        this.weight = weight;
        return this;
    }

    public Person create() {
        return new Person(name, sex, age, height, weight);
    }
}

package com.pattern.builder;

public class Director {//导演者

    private Builder mBuilder;


    public Director(Builder builder) {
        mBuilder = builder;
    }


    public void construct(String name, boolean sex, int age, float height, float weight) {
        mBuilder.setAge(age);
        mBuilder.setName(name);
        mBuilder.setSex(sex);
        mBuilder.setHeight(height);
        mBuilder.setWeight(weight);
    }

}

package com.pattern.builder;

import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import com.pattern.entity.Person;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//        Builder builder = new Builder();
//        builder.setAge(18);
//        builder.setName("xiaoming");
//        builder.setSex(true);
//        builder.setHeight(183);
//        builder.setWeight(70);
//
//        Person person = builder.create();
//        Log.i(TAG, "onCreate: " + person.toString());

        Builder builder = new ConcreteBuilder();
        Director director = new Director(builder);
        director.construct("xiaoming", true, 18, 183, 70);
        Person person = builder.create();
        Log.i(TAG, "onCreate: " + person.toString());
        showDialog(this);
    }

    private void showDialog(Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setIcon(R.drawable.ic_launcher);
        builder.setTitle("敬告");
        builder.setMessage("要退出app?");
        builder.setPositiveButton("退出", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                MainActivity.this.finish();
            }
        });

        builder.setNegativeButton("取消", null);
        builder.create().show();

    }

}