XListView介绍与使用(附加核心代码)

1：说到XlistView其实它和ListView一样都是用于展示数据使用的控件，XListView继承ListView它与listview不同的是，它封装可以下拉刷新，上拉加载更多的方法，我们只需要重写它的方法即可实现刷新与加载更多的操作。

2：使用XListView需要导入lib包，然后添加到当前module中就可以使用。

核心代码如下：

package com.example.xlistviewdemo;

import android.os.AsyncTask;
import android.os.Bundle;
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.example.xlistviewlibrary.tools.UrlConnectionTools;
import com.example.xlistviewlibrary.view.XListView;
import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class MainActivity extends AppCompatActivity implements XListView.IXListViewListener {
    String url = "http://api.fang.anjuke.com/m/android/1.3/shouye/recInfosV3/?city_id=14&lat=40.04652&lng=116.306033&api_key=androidkey&sig=9317e9634b5fbc16078ab07abb6661c5&macid=45cd2478331b184ff0e15f29aaa89e3e&app=a-ajk&_pid=11738&o=PE-TL10-user+4.4.2+HuaweiPE-TL10+CHNC00B260+ota-rel-keys%2Crelease-keys&from=mobile&m=Android-PE-TL10&cv=9.5.1&cid=14&i=864601026706713&v=4.4.2&pm=b61&uuid=1848c59c-185d-48d9-b0e9-782016041109&_chat_id=0&qtime=20160411091603";
    private XListView xListView;
    private List<Bean.ResultBean.RowsBean> list = new ArrayList<>();
    private ImageLoader instance;
    private MyAdapter myAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化Xlistview控件
        xListView = (XListView) findViewById(R.id.xlistview);
        //得到图片框架
        instance = ImageLoader.getInstance();
        initdata();
        myAdapter = new MyAdapter();
        xListView.setAdapter(myAdapter);
        xListView.setXListViewListener(this);
        xListView.setPullLoadEnable(true);


    }

    //  关联适配器
    private void initdata() {
        MyAsyncTask myAsyncTask = (MyAsyncTask) new MyAsyncTask().execute(url);
    }


    class MyAsyncTask extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... strings) {
            return UrlConnectionTools.getJson(strings[0]);
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            Gson gson = new Gson();
            Bean bean = gson.fromJson(s, Bean.class);
            Bean.ResultBean result = bean.getResult();
            List<Bean.ResultBean.RowsBean> rows = result.getRows();
            list.addAll(rows);
            myAdapter.notifyDataSetChanged();
        }
    }

    //自定义适配器
    class MyAdapter extends BaseAdapter {
        @Override
        public int getCount() {
            return list.size();
        }

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

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

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            ViewHolder vh;
            if (view == null) {
                vh = new ViewHolder();
                view = View.inflate(MainActivity.this, R.layout.item, null);
                vh.title = (TextView) view.findViewById(R.id.wenzi);
                vh.icon = (ImageView) view.findViewById(R.id.tupian);
                view.setTag(vh);
            } else {

                vh = (ViewHolder) view.getTag();
            }
            vh.title.setText(list.get(i).getInfo().getLoupan_name());
            instance.displayImage(list.get(i).getInfo().getDefault_image(), vh.icon);

            return view;
        }
    }

    // 优化控件类
    class ViewHolder {
        TextView title;
        ImageView icon;
    }

    //此方法用于刷新所做的操作
    @Override
    public void onRefresh() {
        list.clear();
        initdata();
        shezhi();
    }

    //此方法用于加载更多是所做的操作
    @Override
    public void onLoadMore() {
        initdata();
        shezhi();
    }

    private void shezhi() {
        xListView.stopRefresh();
        xListView.stopLoadMore();
        Date date = new Date();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MM月dd号HH时mm分");
        String format = simpleDateFormat.format(date);
        xListView.setRefreshTime(format);
    }
}