使用MVP架构 通过网络请求的方式 实现登录功能

其他 2018-11-19 05:10:49 阅读次数: 0

MainActivity

package com.mvp.loginmvp;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener, UserPresenter.OnUserPresenter {


    private EditText mUsername;
    private EditText mPassword;
    private Button login;
    Dao dao;
    String urlstring = "http://i.jandan.net/?oxwlxojflwblxbsapi=get_recent_posts&include=url,date,tags,author,title,excerpt,comment_count,comment_status,custom_fields&page=1&custom_fields=thumb_c,views&dev=1";
    private UserPresenter mUserPresenter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        dao = new Dao(this);
        UserPresenter.loadData(urlstring,dao);
        mUserPresenter = new UserPresenter(this);
    }

    //初始化资源控件
    private void initView() {
        mUsername = findViewById(R.id.username);
        mPassword = findViewById(R.id.password);
        login = findViewById(R.id.login);

        login.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.login:
                //获取账号与密码
                String username = mUsername.getText().toString().trim();
                String password = mPassword.getText().toString().trim();

                User user = new User();
                user.username = username;
                user.password = password;

                boolean b =  UserPresenter.kong(user);

                if (b){
                    Toast.makeText(this, "账号或者密码不能为空", Toast.LENGTH_SHORT).show();
                }else{
                    mUserPresenter.gets(dao,user);
                }
                break;
        }
    }

    @Override
    public void success() {
        Toast.makeText(this, "登录成功", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void error() {
        Toast.makeText(this, "登录失败", Toast.LENGTH_SHORT).show();
    }
}

User类

package com.mvp.loginmvp;

/**
 * date:2018/11/9
 * author:李壮(HUAWEI)
 * function:
 */
public class User {
    public String username;
    public String password;
}

创建Presenter

package com.mvp.loginmvp;

import android.os.AsyncTask;
import android.text.TextUtils;
import java.util.List;

/**
 * date:2018/11/9
 * author:李壮(HUAWEI)
 * function:
 */
public class UserPresenter {

    public UserPresenter(OnUserPresenter onUserPresenter) {
        mOnUserPresenter = onUserPresenter;
    }

    //加载网络数据
    public static void loadData(String urlstring, final Dao dao){
        new AsyncTask<String, Void, List<Bean.PostsBean>>() {
            Bean bean = null;
            @Override
            protected List<Bean.PostsBean> doInBackground(String... strings) {

                bean =  HTTPURL.gethttp(strings[0],Bean.class);
                return bean.getPosts();
            }

            @Override
            protected void onPostExecute(List<Bean.PostsBean> postsBeans) {
                super.onPostExecute(postsBeans);
                for (int i =0;i<postsBeans.size();i++){
                    dao.add(postsBeans.get(i).getId()+"",postsBeans.get(i).getId()+"");
                }
            }
        }.execute(urlstring);
    }

    //判断用户输入的账号和密码是否为空
    public static boolean kong(User user) {
        if (TextUtils.isEmpty(user.username) || TextUtils.isEmpty(user.password)){
            return true;
        }
        return false;
    }

    public void gets(Dao dao, User user){

        boolean select = dao.select(user.username, user.password);
        if (select){
            mOnUserPresenter.success();
        }else{
            mOnUserPresenter.error();
        }

    }

    public interface OnUserPresenter{
        void success();
        void error();
    }

    private OnUserPresenter mOnUserPresenter;


}

创建数据库 , 创建数据库表

package com.mvp.loginmvp;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.support.annotation.Nullable;

/**
 * date:2018/11/9
 * author:李壮(HUAWEI)
 * function:
 */
public class SQLite extends SQLiteOpenHelper {
    //创建数据库
    public SQLite( Context context) {
        super(context, "users.db", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        //创建表
        db.execSQL("create table users(id Integer, name text,password text)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {

    }
}

创建 数据库的增删该查类

package com.mvp.loginmvp;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

/**
 * date:2018/11/9
 * author:李壮(HUAWEI)
 * function:
 */
public class Dao {

    private final SQLiteDatabase database;

    public Dao(Context context) {
        SQLite sqLite = new SQLite(context);
        database = sqLite.getReadableDatabase();
    }
    public void add(String name,String password){
        //添加语句
        database.execSQL("insert into users(name,password) values(?,?)",new Object[]{name,password});

    }
    public boolean select(String name,String password){
        //查询语句
        Cursor cursor = database.rawQuery("select * from users where name = ? and password = ?", new String[]{name, password});

        while (cursor.moveToNext()){
            return true;
        }
        return false;

    }
}

封装网络请求工具类

package com.mvp.loginmvp;

import com.google.gson.Gson;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * date:2018/11/9
 * author:李壮(HUAWEI)
 * function:
 */
public class HTTPURL {
    public static <T> T gethttp(String url,Class c) {
       String ss=  getString(url);
        T t = (T) new Gson().fromJson(ss,c);
        return t;
    }

    private static String getString(String urlString) {

        try {
            //1.获取地址
            URL url = new URL(urlString);
            //2.打开连接
            HttpURLConnection coon = (HttpURLConnection) url.openConnection();
            //3.设置请求方法
            coon.setRequestMethod("GET");
            //4.设置连接超时
            coon.setConnectTimeout(5000);
            //5.设置读取超时
            coon.setReadTimeout(5000);
            //6.请求结果
            if (coon.getResponseCode() == 200){
                String ss = stream2String(coon.getInputStream());
                return ss;
            }

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    private static String stream2String(InputStream is) {
        StringBuilder sb = new StringBuilder();
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        try {
            for (String temp = reader.readLine() ; temp !=null;temp = reader.readLine()){
                sb.append(temp);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sb.toString();
    }


}

布局文件走一波

<?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"
    android:orientation="vertical">

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

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="用户名"/>

        <EditText
            android:id="@+id/username"
            android:layout_width="200dp"
            android:layout_height="wrap_content"/>

    </LinearLayout>

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

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

        <EditText
            android:id="@+id/password"
            android:layout_width="200dp"
            android:layout_height="wrap_content"/>

    </LinearLayout>

    <Button
        android:id="@+id/login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:text="登录"
        />
</LinearLayout>

添加请求网络权限
在这里插入图片描述

创建Bean类

package com.mvp.loginmvp;

import java.util.List;

/**
 * date:2018/11/9
 * author:李壮(HUAWEI)
 * function:
 */
public class Bean {


    private String status;
    private int count;
    private int count_total;
    private int pages;
    private List<PostsBean> posts;

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public int getCount_total() {
        return count_total;
    }

    public void setCount_total(int count_total) {
        this.count_total = count_total;
    }

    public int getPages() {
        return pages;
    }

    public void setPages(int pages) {
        this.pages = pages;
    }

    public List<PostsBean> getPosts() {
        return posts;
    }

    public void setPosts(List<PostsBean> posts) {
        this.posts = posts;
    }

    public static class PostsBean {

        private int id;
        private String url;
        private String title;
        private String excerpt;
        private String date;
        private AuthorBean author;
        private int comment_count;
        private String comment_status;
        private CustomFieldsBean custom_fields;
        private List<TagsBean> tags;

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public String getExcerpt() {
            return excerpt;
        }

        public void setExcerpt(String excerpt) {
            this.excerpt = excerpt;
        }

        public String getDate() {
            return date;
        }

        public void setDate(String date) {
            this.date = date;
        }

        public AuthorBean getAuthor() {
            return author;
        }

        public void setAuthor(AuthorBean author) {
            this.author = author;
        }

        public int getComment_count() {
            return comment_count;
        }

        public void setComment_count(int comment_count) {
            this.comment_count = comment_count;
        }

        public String getComment_status() {
            return comment_status;
        }

        public void setComment_status(String comment_status) {
            this.comment_status = comment_status;
        }

        public CustomFieldsBean getCustom_fields() {
            return custom_fields;
        }

        public void setCustom_fields(CustomFieldsBean custom_fields) {
            this.custom_fields = custom_fields;
        }

        public List<TagsBean> getTags() {
            return tags;
        }

        public void setTags(List<TagsBean> tags) {
            this.tags = tags;
        }

        public static class AuthorBean {

            private int id;
            private String slug;
            private String name;
            private String first_name;
            private String last_name;
            private String nickname;
            private String url;
            private String description;

            public int getId() {
                return id;
            }

            public void setId(int id) {
                this.id = id;
            }

            public String getSlug() {
                return slug;
            }

            public void setSlug(String slug) {
                this.slug = slug;
            }

            public String getName() {
                return name;
            }

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

            public String getFirst_name() {
                return first_name;
            }

            public void setFirst_name(String first_name) {
                this.first_name = first_name;
            }

            public String getLast_name() {
                return last_name;
            }

            public void setLast_name(String last_name) {
                this.last_name = last_name;
            }

            public String getNickname() {
                return nickname;
            }

            public void setNickname(String nickname) {
                this.nickname = nickname;
            }

            public String getUrl() {
                return url;
            }

            public void setUrl(String url) {
                this.url = url;
            }

            public String getDescription() {
                return description;
            }

            public void setDescription(String description) {
                this.description = description;
            }
        }

        public static class CustomFieldsBean {
            private List<String> thumb_c;

            public List<String> getThumb_c() {
                return thumb_c;
            }

            public void setThumb_c(List<String> thumb_c) {
                this.thumb_c = thumb_c;
            }
        }

        public static class TagsBean {
            
            private int id;
            private String slug;
            private String title;
            private String description;
            private int post_count;

            public int getId() {
                return id;
            }

            public void setId(int id) {
                this.id = id;
            }

            public String getSlug() {
                return slug;
            }

            public void setSlug(String slug) {
                this.slug = slug;
            }

            public String getTitle() {
                return title;
            }

            public void setTitle(String title) {
                this.title = title;
            }

            public String getDescription() {
                return description;
            }

            public void setDescription(String description) {
                this.description = description;
            }

            public int getPost_count() {
                return post_count;
            }

            public void setPost_count(int post_count) {
                this.post_count = post_count;
            }
        }
    }
}

猜你喜欢

转载自blog.csdn.net/LZ0419/article/details/83903499
今日推荐
《美国对全球网络空间安全与发展的威胁和破坏》报告发布
火速冲上 GitHub 热榜 —— 开源编程语言、框架哪有这么可爱？
北京人形机器人创新中心发布全球首个纯电驱拟人奔跑的全尺寸人形机器人“天工”
LFOSSA 源来如此公开课 | 掌握云原生未来：CNCF 认证全面攻略与备考秘籍
周排行
让自己的头脑极度开放
CentOS 6.5(x64) 和Redhat6.5操作系误删libc
高可用注册中心
【日记】12.28/【题解】AtCoder AGC041
XML（5）_XML 约束_DTD
Java集合Map（四）
树梅派安装桌面环境教程
pipenv 的 使用和安装
小程序白屏问题和内存研究
C语言简单选择排序
每日归档
更多
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)
2024-04-29(40)
2024-04-28(0)
2024-04-27(56)
2024-04-26(39)
2024-04-25(22)
2024-04-24(36)
2024-04-23(26)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022