Android 安卓MVP架构（带视频）

绝地灬酷狼 2022-02-04 15:27 288阅读 0赞

# 引入 #

M：M层，也就是我们在程序中经常出现的model层，他的功能就是处理数据，其他任务不由他来接手。

V：V层，我们的view层，也就是显示数据的地方，我们在得到数据之后，把数据传递给view层，通过他来显示数据。同时，view层的点击事件等处理会在这里出现，但真正的数据处理不是在这里，而是在model层中处理。

P：P层，也就是Presenter层，他是我们mvp架构中的中间人，通过p层的连接，让我们可以是M层和V层进行通信。M层在获取到数据之后，把它交给P，P层在交给View层，同样，View层的点击事件等处理通过P层去通知M层，让他去进行数据处理。

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# 推荐文章 #

[安卓MVC架构 https://blog.csdn.net/qq\_40881680/article/details/101571000][MVC_ https_blog.csdn.net_qq_40881680_article_details_101571000]

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## 视频讲解：点击下方按钮播放 ##

mvp架构模式讲解(仅限于新手理解)

视频源地址： [https://www.bilibili.com/video/av69755230][https_www.bilibili.com_video_av69755230]

代码如下  
MainActivity:

package com.brk.mvp;
    
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.widget.Button;
    import android.widget.TextView;
    
    public class MainActivity extends AppCompatActivity implements View { 
    
        private TextView news;
        private Button add;
        private Button less;
    
        MainPresenter mainPresenter = new MainPresenter(this);
    
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            initView();
    
            mainPresenter.show();
            
        }
    
    
        @Override
        public void addNum(String string) { 
            news.setText(string);
        }
    
        @Override
        public void lessNum(String string) { 
            news.setText(string);
        }
    
        @Override
        public void showNum(String string) { 
            news.setText(string);
        }
    
        private void initView() { 
            news = (TextView) findViewById(R.id.news);
            add = (Button) findViewById(R.id.add);
            less = (Button) findViewById(R.id.less);
    
    
            add.setOnClickListener(new android.view.View.OnClickListener() { 
                @Override
                public void onClick(android.view.View v) { 
                    mainPresenter.addNum();
                }
            });
    
            less.setOnClickListener(new android.view.View.OnClickListener() { 
                @Override
                public void onClick(android.view.View v) { 
                    mainPresenter.lessNum();
                }
            });
        }
    
    }

--------------------

MainPresenter:

package com.brk.mvp;
    
    public class MainPresenter implements Presenter { 
    
        PeopleBean peopleBean = new PeopleBean("NorthernBrain", 0);
    
        private View view;
    
        public MainPresenter(View view) { 
            this.view = view;
        }
    
        @Override
        public void addNum() { 
    
            peopleBean.setNum(peopleBean.getNum() + 1);
            view.addNum(peopleBean.toString());
        }
    
        @Override
        public void lessNum() { 
            peopleBean.setNum(peopleBean.getNum() - 1);
            view.addNum(peopleBean.toString());
        }
    
        @Override
        public void show() { 
            view.showNum(peopleBean.toString());
        }
    }

--------------------

PeopleBean:

package com.brk.mvp;
    
    public class PeopleBean { 
    
        private String name;
        private int num;
    
    
        public PeopleBean(String name, int num) { 
            this.name = name;
            this.num = num;
        }
    
        @Override
        public String toString() { 
            return "PeopleBean{" +
                    "name='" + name + '\'' +
                    ", num=" + num +
                    '}';
        }
    
        public String getName() { 
            return name;
        }
    
        public void setName(String name) { 
            this.name = name;
        }
    
        public int getNum() { 
            return num;
        }
    
        public void setNum(int num) { 
            this.num = num;
        }
    }

--------------------

Presenter:

package com.brk.mvp;
    
    public interface Presenter { 
        void addNum();
    
        void lessNum();
    
        void show();
    }

--------------------

View:

package com.brk.mvp;
    
    public interface View { 
    
        void addNum(String string);
    
        void lessNum(String string);
    
        void showNum(String string);
    }

--------------------

布局：

<?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity">
    
        <TextView android:id="@+id/news" android:layout_width="match_parent" android:layout_height="100dp" android:text="null" android:layout_marginTop="8dp" app:layout_constraintTop_toTopOf="parent" tools:ignore="MissingConstraints" tools:layout_editor_absoluteX="0dp" />
    
        <LinearLayout android:layout_width="match_parent" android:layout_height="60dp" android:layout_marginTop="8dp" android:orientation="horizontal" app:layout_constraintTop_toBottomOf="@+id/news" tools:ignore="MissingConstraints">
    
            <Button android:id="@+id/add" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="加" />
    
            <Button android:id="@+id/less" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="减" />
    
        </LinearLayout>
    </android.support.constraint.ConstraintLayout>

[MVC_ https_blog.csdn.net_qq_40881680_article_details_101571000]: https://blog.csdn.net/qq_40881680/article/details/101571000
[https_www.bilibili.com_video_av69755230]: https://www.bilibili.com/video/av69755230