An_XListView 上拉加载更多---下拉刷新

http://blog.csdn.net/libaineu2004/article/details/26582383

http://blog.csdn.net/android_my/article/details/51534853

http://www.jianshu.com/p/9c40c0968f4b

http://blog.csdn.net/afanbaby/article/details/55804850

2017-08-11_203949.png

自定义view包，将XListView,XListViewFooter,XListViewHeader
这三个类导入工程里
并加载布局文件：
xlistview_footer.xml，xlistview_header.xml
和图片：xlistview_arrow.png
以及strings.xml 配置
最后 改包名和R文件（Eclipse 里用 ctrl+shift+o）

MainActivity

package com.example.xlistview_test;

import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import bean.Max;
import xlistview_view.XListView;

public class MainActivity extends AppCompatActivity {
    XListView xlv;
    int currenti=1;
    boolean flag=true;
    List list=new ArrayList();
    MyAdapter myAdapter;
    Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ImageLoaderConfiguration config = ImageLoaderConfiguration.createDefault(this);
        ImageLoader.getInstance().init(config);

        xlv=(XListView) findViewById(R.id.xlv);
        initData();
        myAdapter = new MyAdapter();
        xlv.setAdapter(myAdapter);
        xlv.setPullRefreshEnable(true);
        xlv.setPullLoadEnable(true);
        xlv.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {

                        flag=false;
                        currenti=1;
                        initData();
                        xlv.stopRefresh();


            }

            @Override
            public void onLoadMore() {

                        flag=true;
                        currenti++;
                        initData();
                        xlv.stopLoadMore();
            }
        });
    }

    private void initData() {
        new AsyncTask(){

            @Override
            protected String doInBackground(String... strings) {
                getData();
                return null;
            }

            @Override
            protected void onPostExecute(String s) {
                myAdapter.notifyDataSetChanged();
                super.onPostExecute(s);
            }
        }.execute();
    }

    private void getData() {
        try {
            URL url = new URL("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page=" + currenti);
            HttpURLConnection conn=(HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            int code = conn.getResponseCode();
            if(code==200){
                Gson gson = new Gson();
                Max m = gson.fromJson(new InputStreamReader(conn.getInputStream(), "UTF-8"), Max.class);

                if(flag){
                    list.addAll(m.getNewslist());
                }else{
                    list=m.getNewslist();
                }

            }

        } catch (Exception e) {
            e.printStackTrace();
        }

    }
    class MyAdapter extends BaseAdapter{

        @Override
        public int getCount() {
            if(list!=null){
                return list.size();
            }
            return 0;
        }

        @Override
        public Object getItem(int i) {
            return i;
        }

        @Override
        public long getItemId(int i) {
            return 0;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            ViewHolder holder;
            if(view==null){
                view=View.inflate(MainActivity.this,R.layout.item,null);
                holder=new ViewHolder();
                holder.tv=view.findViewById(R.id.tv);
                holder.iv=view.findViewById(R.id.iv);
                view.setTag(holder);
            }else{
                holder=(ViewHolder) view.getTag();
            }
            holder.tv.setText(list.get(i).getTitle());
            ImageLoader.getInstance().displayImage(list.get(i).getPicUrl(),holder.iv);
            return view;
        }
    }
    class ViewHolder{
        TextView tv;
        ImageView iv;
    }
}

activity_main.xml 布局

item.xml 布局（xlistview 加载的布局）