httpurlconnection,imageloder,xlistview,加分布局,网络求求,Viewpage实现fragment

package bwie.com.majunbao20180716.activity.activity;

import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.widget.RadioGroup;

import java.util.ArrayList;

import bwie.com.majunbao20180716.R;
import bwie.com.majunbao20180716.activity.adapter.MyFragmentAdapter;
import bwie.com.majunbao20180716.activity.fragment.Fragment1;
import bwie.com.majunbao20180716.activity.fragment.Fragment2;
import bwie.com.majunbao20180716.activity.fragment.Fragment3;

public class MainActivity extends AppCompatActivity {

    private ViewPager view_pager;
    private RadioGroup radio_group;
    private Fragment3 fragment3;
    private Fragment2 fragment2;
    private Fragment1 fragment1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        view_pager = (ViewPager) findViewById(R.id.view_pager);
        radio_group = (RadioGroup) findViewById(R.id.radio_group);
        //创建fragment
        fragment1 = new Fragment1();
        fragment2 = new Fragment2();
        fragment3 = new Fragment3();
        //创建集合
        ArrayList<Fragment> list = new ArrayList<>();
        list.add(fragment1);
        list.add(fragment2);
        list.add(fragment3);
        //创建适配器
        MyFragmentAdapter adapter=new MyFragmentAdapter(getSupportFragmentManager(),list);
        //添加到适配器
        view_pager.setAdapter(adapter);
        //点击改变当前页面
        radio_group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {
                switch (checkedId){
                    case R.id.rb1:
                        view_pager.setCurrentItem(0);
                        break;
                    case R.id.rb2:
                        view_pager.setCurrentItem(1);
                        break;
                    case R.id.rb3:
                        view_pager.setCurrentItem(2);
                        break;
                }
            }
        });
        //滑动改变fragment
        view_pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                radio_group.check(radio_group.getChildAt(position).getId());
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }
}
package bwie.com.majunbao20180716.activity.adapter;

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

import java.util.List;

/**
 * Created by 我 on 2018/7/16.
 */

public class MyFragmentAdapter extends FragmentPagerAdapter{
    private List<Fragment> list;
    public MyFragmentAdapter(FragmentManager fm, List<Fragment> list) {
        super(fm);
        this.list = list;
    }

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

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

}

package bwie.com.majunbao20180716.activity.fragment;


import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.google.gson.Gson;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import bwie.com.majunbao20180716.R;
import bwie.com.majunbao20180716.activity.adapter.MyAdapter;
import bwie.com.majunbao20180716.activity.bean.UserBean;
import bwie.com.majunbao20180716.activity.view.XListView;

/**
 * A simple {@link Fragment} subclass.
 */
public class Fragment1 extends Fragment {


    private XListView xlistview;
    private int page=1;
    private String path="http://www.xieast.com/api/news/news.php?page=";
    private List<UserBean.DataBean> list=new ArrayList<>();
    private MyAdapter adapter;

    public Fragment1() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment1, container, false);
        xlistview = (XListView) view.findViewById(R.id.xlistview);
        return view;
    }
    //逻辑代码
    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        //xlistview配置
        xlist();
        //网络请求
       new MyAsycnTask().execute();

        //执行
    }

    private void xlist() {
        //下拉刷新
        xlistview.setPullRefreshEnable(true);
        //上拉加载
        xlistview.setPullLoadEnable(true);
        //监听
        xlistview.setXListViewListener(new XListView.IXListViewListener() {
            //下拉刷新
            @Override
            public void onRefresh() {
                page=1;
                new MyAsycnTask().execute();
            }
            //上拉加载
            @Override
            public void onLoadMore() {
                page+=1;
                new MyAsycnTask().execute();
            }
        });
        //创建适配器
        adapter = new MyAdapter(getActivity(), list);
        xlistview.setAdapter(adapter);

    }

    private class MyAsycnTask extends AsyncTask<String,Void,String>{

        @Override
        protected String doInBackground(String... params) {
            //定义路径
            String da=path+page;
            //网络请求
            try {
                URL url=new URL(da);
                Log.i("aaa",da);
                //获取网络请求
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                //设置请求超时时间
                connection.setConnectTimeout(5000);
                //设置请求读取时间
                connection.setReadTimeout(5000);
                //设置求求方式
                connection.setRequestMethod("GET");
                //判断状态吗
                if (connection.getResponseCode()==200) {
                    InputStream inputStream = connection.getInputStream();
                    ByteArrayOutputStream bos=new ByteArrayOutputStream();
                    byte[] buffer=new byte[1024];
                    int len=0;
                    while ((len=inputStream.read(buffer))!=-1){
                        bos.write(buffer,0,len);
                    }
                    //关流
                    inputStream.close();
                    bos.close();
                    String s = bos.toString();
                    Log.i("aaa",s);
                    return s;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            Gson gson = new Gson();
            UserBean userBean = gson.fromJson(s, UserBean.class);
            List<UserBean.DataBean> data = userBean.getData();
            if (page==1) {
                list.clear();
            }
            list.addAll(data);
            adapter.notifyDataSetChanged();
            if (page==1){
             xlistview.stopRefresh();
            }else{
                xlistview.stopLoadMore();
            }
        }
    }
}

package bwie.com.majunbao20180716.activity.adapter;

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

import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.List;

import bwie.com.majunbao20180716.R;
import bwie.com.majunbao20180716.activity.bean.UserBean;

/**
 * Created by 我 on 2018/7/16.
 */

public class MyAdapter extends BaseAdapter{
    private static final int TYPE_0 = 0;
    private static final int TYPE_1 = 1;
    private Context context;
    private List<UserBean.DataBean> list;

    public MyAdapter(Context context, List<UserBean.DataBean> list) {
        this.context = context;
        this.list = list;
    }

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

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

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

    @Override
    public int getViewTypeCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        String pc1 = list.get(position).getThumbnail_pic_s();
        String pc2 = list.get(position).getThumbnail_pic_s02();
        String pc3 = list.get(position).getThumbnail_pic_s03();
        if (pc1!=null&&pc2==null&&pc3==null) {
            return TYPE_0;
        }else {
            return TYPE_1;
        }
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder=null;
        int type = getItemViewType(position);
        Log.i("aaa",type+"123");
        if (convertView==null) {
            //有1个==0
            if (type==TYPE_0) {
                convertView = View.inflate(context, R.layout.item_adapter1, null);
                holder = new ViewHolder();
                holder.img1 = (ImageView) convertView.findViewById(R.id.img1);
                holder.text_author = (TextView) convertView.findViewById(R.id.text_author);
                holder.text_title = (TextView) convertView.findViewById(R.id.text_title);
                convertView.setTag(holder);
            }else {
                convertView = View.inflate(context, R.layout.item_adapter2, null);
                holder = new ViewHolder();
                holder.img2 = (ImageView) convertView.findViewById(R.id.img2);
                holder.img3 = (ImageView) convertView.findViewById(R.id.img3);
                holder.img4 = (ImageView) convertView.findViewById(R.id.img4);
                holder.text_author2 = (TextView) convertView.findViewById(R.id.text_author2);
                holder.text_title2 = (TextView) convertView.findViewById(R.id.text_title2);
                convertView.setTag(holder);
            }
        }else {
            holder = (ViewHolder) convertView.getTag();
        }
        if (type==TYPE_0){
            holder.text_title.setText(list.get(position).getTitle());
            holder.text_author.setText(list.get(position).getAuthor_name());
            ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder.img1);
        }else {
            holder.text_title2.setText(list.get(position).getTitle());
            holder.text_author2.setText(list.get(position).getAuthor_name());
            ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder.img2);
            ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s02(),holder.img3);
            ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s03(),holder.img4);
        }
        return convertView;
    }
    private class ViewHolder{
        ImageView img1,img2,img3,img4;
        TextView text_title,text_title2;
        TextView text_author,text_author2;
    }
}
package bwie.com.majunbao20180716.activity.application;

import android.app.Application;
import android.graphics.Bitmap;
import android.os.Environment;

import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiskCache;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.cache.memory.impl.LRULimitedMemoryCache;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

import java.io.File;

/**
 * Created by 我 on 2018/7/16.
 */

public class MyApplication extends Application{
    File path= new File(Environment.getExternalStorageDirectory()+"/"+"image");
    @Override
    public void onCreate() {
        super.onCreate();
        ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this)
                .defaultDisplayImageOptions(options())
                //大小
                .diskCacheExtraOptions(400,800,null)
                //个数
                .diskCacheFileCount(100)
                //分辨
                .diskCacheSize(50*1024*1024)
                .threadPoolSize(3)
                .memoryCache(new LRULimitedMemoryCache(2*1024*1024))
                //路径
                .diskCache(new UnlimitedDiskCache(path))
                .diskCacheFileNameGenerator(new Md5FileNameGenerator())
                .build();
        ImageLoader.getInstance().init(configuration);
    }

    private DisplayImageOptions options() {
        DisplayImageOptions options = new DisplayImageOptions.Builder()
                //s设置色彩编码
                .bitmapConfig(Bitmap.Config.RGB_565)
                //设置下载图片是否显示在sd卡
                .cacheInMemory(true)
                .build();
        return options;
    }
}