MVP框架+登录+注册+展示

记住写权限：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.bwie.dome3">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".v.ProductActivy"/>
    </application>

</manifest>

导包加依赖：

 implementation 'com.squareup.okhttp3:okhttp:3.7.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'com.github.bumptech.glide:glide:4.9.0'
    implementation 'com.google.code.gson:gson:2.8.1'

布局：

activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="请输入账号"/>

            <EditText
                android:id="@+id/edit_phone_id"
                android:layout_width="200dp"
                android:layout_height="50dp" />

        </LinearLayout>


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="请输入密码"/>

            <EditText
                android:id="@+id/edit_pwd_id"
                android:layout_width="200dp"
                android:layout_height="50dp" />
        </LinearLayout>


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <Button
                android:id="@+id/but_login_id"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="登陆"
                />

            <Button
                android:id="@+id/but_regist_id"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="注册"
                />
        </LinearLayout>





    </LinearLayout>

</LinearLayout>



item_1_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_vertical"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/title_1_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="title"/>

        <ImageView
            android:id="@+id/imag_1_id"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:src="@mipmap/ic_launcher_round"/>
    </LinearLayout>

</LinearLayout>

item_2_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal"
        android:orientation="vertical">

        <TextView
            android:id="@+id/title_2_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="title"/>

        <ImageView
            android:id="@+id/imag_2_id"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:src="@mipmap/ic_launcher_round"/>
    </LinearLayout>

</LinearLayout>


product_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <android.support.v7.widget.RecyclerView
            android:id="@+id/RecyclerView_id"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </LinearLayout>

</LinearLayout>

主方法：

MainActivity:
package com.bwie.dome3;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.bwie.dome3.contarct.ContarctIntface;
import com.bwie.dome3.p.MyPrensenter;
import com.bwie.dome3.v.ProductActivy;

public class MainActivity extends AppCompatActivity implements ContarctIntface.UserViewIntface{

    EditText edphone , edpwd;
    Button loginBut , registBut;
    //声明P层的接口对象
    ContarctIntface.PresenterIntface presenterIntface;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        presenterIntface = new MyPrensenter(this);
        init();
    }

    private void init() {
        edphone = findViewById(R.id.edit_phone_id);
        edpwd = findViewById(R.id.edit_pwd_id);
        loginBut = findViewById(R.id.but_login_id);
        registBut = findViewById(R.id.but_regist_id);
        //点击登录
        loginBut.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String phone = edphone.getText().toString();
                String pwd = edpwd.getText().toString();
                //调用P层的方法
                presenterIntface.toMLogin(phone ,pwd );

            }
        });
        //点击注册
        registBut.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String phone = edphone.getText().toString();
                String pwd = edpwd.getText().toString();
                //调用P层的方法
                presenterIntface.toMRegist(phone ,pwd );
            }
        });
    }

    @Override
    public void showLogin(Object object) {
        Intent intent = new Intent(this, ProductActivy.class);
        startActivity(intent);
        finish();

    }

    @Override
    public void showRegist(Object object) {

        Toast.makeText(this , (String)object ,Toast.LENGTH_LONG).show();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        presenterIntface.onDeistry();
        presenterIntface = null;
    }
}



V层ProductActivity:
package com.bwie.dome3.v;

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import com.bwie.dome3.R;
import com.bwie.dome3.adapter.ProductAdapter;
import com.bwie.dome3.bean.ProductBean;
import com.bwie.dome3.contarct.ContarctIntface;
import com.bwie.dome3.p.MyPrensenter;

import java.util.ArrayList;
import java.util.List;

/**
 * @Auther: lenovo
 * @Date: 2019/3/16
 * @Description:
 */
public class ProductActivy extends Activity implements ContarctIntface.ProductViewIntface {

    //声明P层接口对象
    ContarctIntface.PresenterIntface presenterIntface;
    ProductAdapter productAdapter;
    RecyclerView recyclerView;
    List<ProductBean.ProductData.Product> mlist = new ArrayList<>();

    @Override
    protected void onCreate( Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.product_layout);
        recyclerView = findViewById(R.id.RecyclerView_id);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(layoutManager);
        productAdapter = new ProductAdapter(mlist , this);
        recyclerView.setAdapter(productAdapter);

        presenterIntface = new MyPrensenter(this);
        presenterIntface.toProduct();
    }

    @Override
    public void ShowDisplay(Object obj) {
        ProductBean productBean = (ProductBean) obj;
        mlist.addAll(productBean.data.data);
        productAdapter.notifyDataSetChanged();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        presenterIntface.onDeistry();
        presenterIntface = null;
    }
}


工具类OkhttpUtile：
package com.bwie.dome3.utile;

import android.util.Log;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

/**
 * @Auther: lenovo
 * @Date: 2019/3/16
 * @Description:
 */
public class OkhttpUtile {
    static OkhttpUtile utile;
    OkHttpClient okHttpClient;
    //构造方法私有化
    private OkhttpUtile(){
        okHttpClient = new OkHttpClient.Builder().addInterceptor(new MyInterceptor()).build();
    }

    public static synchronized OkhttpUtile getInstace(){
        if (utile == null){
            utile = new OkhttpUtile();
        }
        return utile;
    }
    //get
    public void doGet(Callback callback){
        Request request = new Request.Builder()
                .url("http://365jia.cn/news/api3/365jia/news/headline?page=1")
                .get()
                .build();

        Call call = okHttpClient.newCall(request);
        call.enqueue(callback);
    }

    //post
    public void doPost(String phone,String pwd,String url,Callback callback){
        RequestBody body = new FormBody.Builder()
                .add("phone",phone)
                .add("pwd",pwd)
                .build();
        Request request = new Request.Builder()
                .post(body)
                .url(url)
                .build();

        Call call = okHttpClient.newCall(request);
        call.enqueue(callback);
    }

    public class MyInterceptor implements Interceptor {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();
            Log.e("tag" ,"request url = " + request.url());
            Response response = chain.proceed(request);
            return response;
        }
    }
}


P层代码MyPrensenter：
package com.bwie.dome3.p;

import com.bwie.dome3.contarct.ContarctIntface;
import com.bwie.dome3.m.MyModel;

/**
 * @Auther: lenovo
 * @Date: 2019/3/16
 * @Description:
 */
public class MyPrensenter<T> implements ContarctIntface.PresenterIntface {
    //声明model类对象
    MyModel myModel;
    //声明view接口对象
    T tt;
    public MyPrensenter(T t){
        this.tt = t;
        myModel = new MyModel();
    }

    @Override
    public void toProduct() {
        myModel.setMyCallback(new MyModel.MyCallback(){
            @Override
            public void success(Object obj) {
                ContarctIntface.ProductViewIntface productViewIntface = (ContarctIntface.ProductViewIntface) tt;
                productViewIntface.ShowDisplay(obj);
            }
        });
        myModel.getRequst();
    }

    @Override
    public void toMLogin(String phone, String pwd) {
        myModel.setMyCallback(new MyModel.MyCallback() {
            @Override
            public void success(Object obj) {
                ((ContarctIntface.UserViewIntface) tt).showLogin(obj);
            }
        });
        myModel.postRequst(phone,pwd,"http://172.17.8.100/small/user/v1/register");

    }

    @Override
    public void toMRegist(String phone, String pwd) {
        myModel.setMyCallback(new MyModel.MyCallback() {
            @Override
            public void success(Object obj) {
                ((ContarctIntface.UserViewIntface)tt).showRegist(obj);
            }
        });
        myModel.postRequst(phone,pwd,"http://172.17.8.100/small/user/v1/register");

    }

    @Override
    public void onDeistry() {
        if (tt != null){
            tt = null;
        }
    }
}


M层MyModel代码：
package com.bwie.dome3.m;

import android.os.Handler;
import android.os.Message;

import com.bwie.dome3.bean.ProductBean;
import com.bwie.dome3.utile.OkhttpUtile;
import com.google.gson.Gson;

import org.json.JSONObject;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
 * @Auther: lenovo
 * @Date: 2019/3/16
 * @Description:
 */
public class MyModel {
    MyCallback myCallback;
    Handler mhandel = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String josn = (String) msg.obj;
            int type = msg.arg1;
            if (type == 1){
                Gson gson = new Gson();
                ProductBean productBean = gson.fromJson(josn , ProductBean.class);
                myCallback.success(productBean);
            }
            if (type == 2){
                try{
                    JSONObject object = new JSONObject(josn);
                    String me = object.getString("message");
                    myCallback.success(me);
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }
    };


    public void getRequst(){
        OkhttpUtile utile = OkhttpUtile.getInstace();
        utile.doGet(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {

                String json = response.body().string();
                Message message = new Message();
                message.obj = json;
                message.arg1 = 1;
                mhandel.sendMessage(message);
            }
        });

    }

    public void postRequst(String phone,String pwd,String url){
        OkhttpUtile utile = OkhttpUtile.getInstace();
        utile.doPost(phone, pwd, url, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {

                String json = response.body().string();
                Message message = new Message();
                message.obj = json;
                message.arg1 = 2;
                mhandel.sendMessage(message);
            }
        });
    }
    public void setMyCallback(MyCallback myCallback){
        this.myCallback = myCallback;
    }
    public interface MyCallback{
        public void success(Object obj);
    }
}


ContarctIntface类：
package com.bwie.dome3.contarct;

/**
 * @Auther: lenovo
 * @Date: 2019/3/16
 * @Description:
 */
public interface ContarctIntface {
    //view 层接口
    public interface UserViewIntface{
        public void showLogin(Object object);
        public void showRegist(Object object);
    }

    // view层商品展示接口
    public interface ProductViewIntface{
        public void ShowDisplay(Object obj);
    }

    //p层接口

    public interface PresenterIntface{
        public void toProduct();

        public void toMLogin(String phone , String pwd);
        public void toMRegist(String phone , String pwd);

        public void onDeistry();
    }
}



Bean类ProductBean：
package com.bwie.dome3.bean;

import java.util.List;

/**
 * @Auther: lenovo
 * @Date: 2019/3/16
 * @Description:
 */
public class ProductBean {
    public String httpStatusCode;
    public String code;
    public ProductData data;
    public static class ProductData{
        public String page;
        public String perpage;
        public String max_page;
        public String total;
        public List<Product> data;

        public static class Product{
            public String id;
            public String title;
            public String link;
            public String t;
            public String type;
            public String alias;
            public String pic_amount;
            public String comment_amount;
            public String source;
            public String type_sign;
            public String inner_news;
            public String views;
            public String comment_amount_label;
            public String views_label;
            public List<String> pics;
            public List<String> pics_new;
        }
    }
}



适配器ProductAdapter：
package com.bwie.dome3.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.bwie.dome3.R;
import com.bwie.dome3.bean.ProductBean;

import java.util.List;
import java.util.concurrent.RecursiveTask;

/**
 * @Auther: lenovo
 * @Date: 2019/3/16
 * @Description:
 */
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.Holder> {
    List<ProductBean.ProductData.Product> list;
    int type = 1;
    Context mContext;

    public ProductAdapter(List<ProductBean.ProductData.Product> list , Context context){
        this.list = list;
        this.mContext = context;
    }

    @NonNull
    @Override
    public Holder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        Log.e("tag" ,"onCreateViewHolder");
        View view = null;
        if(type == 1){
            view = LayoutInflater.from(viewGroup.getContext()) .inflate(R.layout.item_1_layout , null);
        }else {
            view = LayoutInflater.from(viewGroup.getContext()) .inflate(R.layout.item_2_layout , null);
        }
        return new Holder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull Holder holder, int i) {
        Log.e("tag" ,"onBindViewHolder");
        if(type == 1){
            String title = list.get(i).title;
            String imagUrl = "http://365jia.cn/uploads/" + list.get(i).pics.get(0);
            if( holder != null&&holder.title_1 != null){
                holder.title_1.setText(title);
                Glide.with(mContext).load(imagUrl).into(holder.imag_1);
            }
        }else {
            String title = list.get(i).title;
            String imagUrl = "http://365jia.cn/uploads/" + list.get(i).pics_new.get(0);
            if( holder != null&&holder.title_2 != null){
                holder.title_2.setText(title);
                Glide.with(mContext).load(imagUrl).into(holder.imag_2);
            }
        }
    }

    @Override
    public int getItemCount() {
        Log.e("tag" ,"getItemCount");
        if(list != null){
            return  list.size();
        }
        return 0;
    }

    //重写条目类型的回调方法
    @Override
    public int getItemViewType(int position) {

        List<String> plist = list.get(position).pics_new ;
        if(plist == null || plist.size() == 0){
            type = 1;
        }else {
            type = 2;
        }
        Log.e("tag" ,"getItemViewType = " + type);

        return super.getItemViewType(position);
    }


    public class Holder extends RecyclerView.ViewHolder{

        public TextView title_1 , title_2;
        public ImageView imag_1 , imag_2;
        public Holder(@NonNull View itemView) {
            super(itemView);
            Log.e("tag" ,"Holder");
            if(type == 1){
                title_1 = itemView.findViewById(R.id.title_1_id);
                imag_1 = itemView.findViewById(R.id.imag_1_id);
            }else {
                title_2 = itemView.findViewById(R.id.title_2_id);
                imag_2 = itemView.findViewById(R.id.imag_2_id);
            }
        }
    }

}