轮播+上拉下拉刷新+数据库

MainActivity

package com.example.lx_zz.activity;

import android.annotation.SuppressLint;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;


import com.example.lx_zz.R;
import com.example.lx_zz.adapter.BujuAdapter;

public class MainActivity extends AppCompatActivity {
    private TabLayout tab;
    private ViewPager viewPager;
    @SuppressLint("WrongViewCast")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //获取资源ID
        tab = findViewById(R.id.tab);
        viewPager = findViewById(R.id.viewpager);
        //设置适配器
        BujuAdapter bujuAdapter = new BujuAdapter(getSupportFragmentManager());
        viewPager.setAdapter(bujuAdapter);

        //根据viewpager设置tab
        tab.setupWithViewPager(viewPager);
    }
}

导航页的Adapter

package com.example.lx_zz.adapter;

import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

import com.example.lx_zz.fragment.Fragmentone;
import com.example.lx_zz.fragment.Fragmentthree;
import com.example.lx_zz.fragment.Fragmenttwo;

import java.util.List;

public class BujuAdapter extends FragmentPagerAdapter {
    //创建体格string数组
    public String[] menus = new String[]{
        "金融","传媒","数码","轻奢","服装","汽车"
    };

    public BujuAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int i) {
        switch (i){
            case 0:
                return new Fragmentone();
            case 1:
                return new Fragmenttwo();
            default:
                return new Fragmentthree();
        }

    }

    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        return menus[position];
    }

    @Override
    public int getCount() {
        return menus.length;
    }
}

Fragmentone页面

package com.example.lx_zz.fragment;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.Toast;

import com.example.lx_zz.R;
import com.example.lx_zz.adapter.LunAdapter;
import com.example.lx_zz.adapter.MyBase;
import com.example.lx_zz.sql.Dao;
import com.example.lx_zz.util.Bean;
import com.example.lx_zz.util.NetUtil;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

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

public class Fragmentone extends Fragment {
    private PullToRefreshListView pull;
    private ViewPager viewPager;
    private int page = 1;
    private final int LOAD_COUNT = 10;
    private String urlstr = "http://api.expoon.com/AppNews/getNewsList/type/1/p/";
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            viewPager.setCurrentItem(viewPager.getCurrentItem()+1);
            handler.sendEmptyMessageDelayed(0,2000);
        }
    };
    private MyBase myBase;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragmentone,container,false);

        return view;
    }

    private List<Integer> list;

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        //获取资源ID
        pull = view.findViewById(R.id.pull);
        viewPager = view.findViewById(R.id.pager);
        //实例化
        list = new ArrayList<>();
        list.add(R.drawable.bbbb);
        list.add(R.drawable.cccc);
        list.add(R.drawable.dddd);
        //给viewpager设置适配器
        LunAdapter lunAdapter = new LunAdapter(getActivity());
        lunAdapter.setList(list);
        viewPager.setAdapter(lunAdapter);
        //分割图片
        viewPager.setCurrentItem(lunAdapter.getCount()/2);
        //向handler发送消息
        handler.sendEmptyMessageDelayed(0,2000);

        //给pull设置适配器
        myBase = new MyBase(getActivity());
        pull.setAdapter(myBase);
        //设置允许
        pull.setMode(PullToRefreshListView.Mode.BOTH);
        //设置监听
        pull.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
                page = 1;
                getdata();
            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
                getdata();
            }
        });
        getdata();
    }

    private void getdata(){
        NetUtil.yibu(urlstr + page, Bean.class, new NetUtil.CallBack<Bean>() {
            @Override
            public void getdata(Bean bean) {
                if (!NetUtil.panduan(getActivity()) || bean == null || !bean.ispanduan()){
                    Toast.makeText(getActivity(),"数据请求错误", Toast.LENGTH_SHORT).show();
                    pull.onRefreshComplete();
                    return;
                }

                if (page == 1){
                    Dao.getInstance(getActivity()).del();
                }
                Dao.getInstance(getActivity()).addAll(bean.getData());

                if (page == 1){
                    myBase.setList(bean.getData());
                }else {
                    myBase.addList(bean.getData());
                }
                page++;

                //停止刷新
                pull.onRefreshComplete();
                if (bean.getData().size() < LOAD_COUNT){
                    pull.setMode(PullToRefreshListView.Mode.PULL_FROM_START);
                }else {
                    pull.setMode(PullToRefreshListView.Mode.BOTH);
                }

            }
        });
    }
}

轮播图的Adapter

package com.example.lx_zz.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

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

public class LunAdapter extends PagerAdapter {
    private List<Integer> list;
    private Context context;

    public LunAdapter(Context context) {
        this.context = context;
        list = new ArrayList<>();
    }

    public void setList(List<Integer> slist) {
        if (slist != null){
            list.addAll(slist);
        }
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return 5000;
    }

    @Override
    public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
        return view == object;
    }

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, int position) {
        //创建imageview
        ImageView imageView = new ImageView(context);
        //设置延伸
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        //设置图片
        imageView.setImageResource(list.get(position%list.size()));
        container.addView(imageView);


        return imageView;
    }

    @Override
    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
        container.removeView((View) object);
    }
}

上拉下拉刷新的Adapter

package com.example.lx_zz.adapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.lx_zz.R;
import com.example.lx_zz.util.Bean;
import com.nostra13.universalimageloader.core.ImageLoader;

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

public class MyBase extends BaseAdapter {
    private List<Bean.Data> list;
    private Context context;

    public MyBase(Context context) {
        this.context = context;
        list = new ArrayList<>();
    }

    public void setList(List<Bean.Data> slist) {
        list.clear();
        if (slist != null){
            list.addAll(slist);
        }
        notifyDataSetChanged();
    }

    public void addList(List<Bean.Data> slist){
        if (slist != null){
            list.addAll(slist);
        }
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Bean.Data getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;
        if (convertView == null){
            convertView = LayoutInflater.from(context).inflate(R.layout.item,parent,false);
            viewHolder = new ViewHolder();
            viewHolder.imageView = convertView.findViewById(R.id.image);
            viewHolder.title = convertView.findViewById(R.id.title);
            viewHolder.summary = convertView.findViewById(R.id.summary);
            convertView.setTag(viewHolder);
        }else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        viewHolder.title.setText(getItem(position).getNews_title());
        viewHolder.summary.setText(getItem(position).getNews_summary());
        ImageLoader.getInstance().displayImage(getItem(position).getPic_url(), viewHolder.imageView);

        return convertView;
    }

    class ViewHolder{
        private ImageView imageView;
        private TextView title,summary;
    }
}

NetUtil页面

package com.example.lx_zz.util;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;

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;
import java.net.URLConnection;

public class NetUtil {
    //网络请求
    public static boolean panduan(Context context){
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);
        //获取网络状态权限
        NetworkInfo activeNetworkInfo = cm.getActiveNetworkInfo();

        return activeNetworkInfo!=null&&activeNetworkInfo.isAvailable();
    }

    //接口回调
    public static interface CallBack<T>{
        void getdata(T t);
    }

    //异步请求
    public static void yibu(final String urlstr, final Class clazz, final CallBack callBack){
        new AsyncTask<String, Void, Object>() {
            @Override
            protected Object doInBackground(String... strings) {
                return jiexi(urlstr,clazz);
            }

            @Override
            protected void onPostExecute(Object o) {
                callBack.getdata(o);
            }
        }.execute(urlstr);
    }

    //网络解析
    public static <T> T jiexi(String urlstr, Class clazz){
        T t = (T) new Gson().fromJson(geturl(urlstr),clazz);
        return t;
    }


    //网络请求
    public static String geturl(String urlstr){
        String result = "";
        try {
            URL url = new URL(urlstr);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("GET");
            urlConnection.setReadTimeout(5000);
            urlConnection.setConnectTimeout(5000);
            int responseCode = urlConnection.getResponseCode();
            if (responseCode == 200){
                result = stream(urlConnection.getInputStream());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        return result;
    }

    //字符流转为字符串
    public static String stream(InputStream inputStream) throws IOException {
        StringBuilder stringBuilder = new StringBuilder();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
        for (String tmp = bufferedReader.readLine(); tmp != null; tmp = bufferedReader.readLine()){
            stringBuilder.append(tmp);
        }

        return stringBuilder.toString();
    }
}

App页面

package com.example.lx_zz.util;

import android.app.Application;

import com.example.lx_zz.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        //全局配置
        DisplayImageOptions options = new DisplayImageOptions.Builder()
                .cacheOnDisk(true)
                .cacheInMemory(true)
                .showImageOnFail(R.mipmap.ic_launcher)
                .showImageForEmptyUri(R.mipmap.ic_launcher)
                .build();
        ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this)
                .defaultDisplayImageOptions(options)
                .memoryCacheSizePercentage(10)
                .diskCacheSize(20*1024*1024)
                .build();
        //初始化
        ImageLoader.getInstance().init(configuration);
    }
}

Fragmenttwo页面

package com.example.lx_zz.fragment;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.example.lx_zz.R;
import com.example.lx_zz.util.Bean;

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

public class Fragmenttwo extends Fragment {
    private TextView text;
    private String id;
    private String title;
    private String summary;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragmenttwo,container,false);

        return view;
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        text = view.findViewById(R.id.cc);
        List<Bean.Data> list = new ArrayList<>();
        for (int i = 0; i<list.size(); i++){
            id = list.get(i).getNews_id();
            title = list.get(i).getNews_title();
            summary = list.get(i).getNews_summary();

        }
        text.setText(id+title+summary+list.size());

    }
}

Fragmenttwo布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <TextView
        android:id="@+id/cc"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        />

</android.support.constraint.ConstraintLayout>

Bean文件

package com.example.lx_zz.util;

import java.util.List;

public class Bean {
    private int status;
    private final int PAN = 1;
    private List<Data> data;

    public List<Data> getData() {
        return data;
    }

    public int getStatus() {
        return status;
    }

    public boolean ispanduan(){
        return PAN == status;
    }

    public static class Data{
        private String news_id;
        private String news_summary;
        private String news_title;
        private String pic_url;

        public Data(String news_id, String news_summary, String news_title) {
            this.news_id = news_id;
            this.news_summary = news_summary;
            this.news_title = news_title;
        }

        public String getNews_id() {
            return news_id;
        }

        public String getNews_summary() {
            return news_summary;
        }

        public String getNews_title() {
            return news_title;
        }

        public String getPic_url() {
            return pic_url;
        }
    }
}

Androidmanifest文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.day18">

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <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:name=".util.App"
        android:theme="@style/AppTheme">
        <activity android:name=".activity.MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

轮播+上拉下拉刷新+数据库

MainActivity

导航页的Adapter

Fragmentone页面

轮播图的Adapter

上拉下拉刷新的Adapter

NetUtil页面

App页面

Fragmenttwo页面

Fragmenttwo布局

Bean文件

Androidmanifest文件

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