XListview 上拉加载 下拉刷新

package com.example.day08;

import android.annotation.SuppressLint;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import com.example.xlistview.me.maxwin.view.XListView;
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.util.List;


public class MainActivity extends AppCompatActivity {
    private XListView contents;
    private NewsAdapter madapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        contents = findViewById(R.id.listview);
        madapter = new NewsAdapter(this);
        contents.setAdapter(madapter);
        contents.setPullLoadEnable(true);

        contents.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {//刷新时
                page = 1;
                initData();
            }
            @Override
            public void onLoadMore() {//加载时
                initData();
            }
        });
        page = 1;
        initData();
    }
    private String URLpath = "http://172.17.8.100/movieApi/movie/v1/findHotMovieList?";
    private int page;
    private final int count = 10;
    @SuppressLint("StaticFieldLeak")
    public void initData(){
        new AsyncTask<String, Void, List<NewsResponse.ResultBean>>() {
            @Override
            protected List<NewsResponse.ResultBean> doInBackground(String... strings) {
                try {
                    URL url = new URL(strings[0]);
                    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                    urlConnection.setRequestMethod("GET");
                    urlConnection.setReadTimeout(5000);
                    urlConnection.setConnectTimeout(5000);
                    int responseCode = urlConnection.getResponseCode();
                    if (responseCode == 200){
                        String result = steam2String(urlConnection.getInputStream());
                        NewsResponse newsResponse = new Gson().fromJson(result, NewsResponse.class);
                        return newsResponse.getResult();
                    }
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return null;
            }
            @Override
            protected void onPostExecute(List<NewsResponse.ResultBean> resultBeans) {
                super.onPostExecute(resultBeans);
                //判断数据加载错误
                if (resultBeans ==null){
                    contents.stopLoadMore();
                    contents.stopRefresh();
                    return;
                }
                if (page==1){
                    madapter.setmDatas(resultBeans);
                }else {
                    madapter.addData(resultBeans);
                }
                contents.setPullLoadEnable(resultBeans.size()>=count);
                //停止刷新加载
                contents.stopRefresh();
                contents.stopLoadMore();
                page++;
            }
        }.execute(URLpath+"page="+page+"&count="+count);
    }
    private String steam2String(InputStream inputStream) throws IOException {
        StringBuilder stringBuilder = new StringBuilder();
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
        BufferedReader br = new BufferedReader(inputStreamReader);
        for (String tem = br.readLine(); tem!=null;tem = br.readLine()){
            stringBuilder.append(tem);
        }
        return stringBuilder.toString();
    }
}



package com.example.day08;


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.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.display.CircleBitmapDisplayer;

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

public class NewsAdapter extends BaseAdapter {
    private Context context;
    private List<NewsResponse.ResultBean> mDatas;

    public NewsAdapter(Context context) {
        this.context = context;
        mDatas = new ArrayList<>();
    }

    public void setmDatas(List<NewsResponse.ResultBean> mDatas) {
        if (mDatas!=null) {
            this.mDatas = mDatas;
        }
        notifyDataSetChanged();
    }
    public void addData(List<NewsResponse.ResultBean> datas){
        if (datas!=null){
            mDatas.addAll(datas);
        }
        notifyDataSetChanged();
    }

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

    @Override
    public NewsResponse.ResultBean getItem(int position) {
        return mDatas.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.lv_item,parent,false);
            viewHolder = new ViewHolder(convertView);
        }else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.bindData(getItem(position));
        return convertView;
    }
    class ViewHolder{
        TextView title;
        TextView summary;
        ImageView icon;

        public ViewHolder(View convertView) {
            this.title = convertView.findViewById(R.id.title);
            this.summary = convertView.findViewById(R.id.summary);
            this.icon = convertView.findViewById(R.id.icon);
            convertView.setTag(this);
        }

        public void bindData(NewsResponse.ResultBean item) {
            title.setText(item.getName());
            summary.setText(item.getSummary());
            DisplayImageOptions options = new DisplayImageOptions.Builder()
                    .cacheInMemory(true)
                    .cacheOnDisk(true)
                    .displayer(new CircleBitmapDisplayer())
                    .build();
            ImageLoader.getInstance().displayImage(item.getImageUrl(),icon,options);
        }
    }
}


package com.example.day08;

import android.app.Application;

import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;


public class App extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this).build();
        ImageLoader.getInstance().init(configuration);
    }
}