XlistView(POST解析、吐司)_android 怎么给list加吐司-优快云博客

本文介绍了一个使用XListView实现下拉刷新和上拉加载更多功能的示例应用。通过AsyncTask异步获取数据，并利用Gson进行JSON解析，展示了如何自定义适配器来填充XListView。

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package com.example.day10_xlistview2;

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

import com.google.gson.Gson;
import com.limxing.xlistview.view.XListView;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.List;

public class MainActivity extends AppCompatActivity{

    private XListView xlv;
    int indax=1;
    Youhua youhua;
    private boolean flag = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        xlv = (XListView) findViewById(R.id.xlv);
        //设置上啦下拉刷新
        xlv.setPullLoadEnable(true);
        //xlv监听事件
        xlv.setXListViewListener(new XListView.IXListViewListener() {
            //下拉刷新
            @Override
            public void onRefresh() {
                flag = false;
                indax--;

                if (indax ==1){
                    indax=5;
                }
                getData("http://apis.juhe.cn/cook/query.php",indax+"",10+"");
                                Toast.makeText(MainActivity.this,"刷新完成",Toast.LENGTH_SHORT).show();

                xlv.stopRefresh(true);            }            //上啦加载            @Override            public void onLoadMore() {                flag = true;                indax--;                if (indax == 1){                    indax =5;                }                getData("http://apis.juhe.cn/cook/query.php",indax+"",10+"");                                Toast.makeText(MainActivity.this,"加载完成",Toast.LENGTH_SHORT).show();

                xlv.stopLoadMore();            }        });            //1=第一条数据 ，   2=等于一次加载10添加数据        getData("http://apis.juhe.cn/cook/query.php",indax+"",10+"");    }    //pn等于开始页面   rn等于下一个页面    public  void  getData(String data,String pn,String rn){        new AsyncTask<String,Void,String>(){            @Override            protected void onPostExecute(String s) {                super.onPostExecute(s);                Gson gson = new Gson();                Bean bean = gson.fromJson(s, Bean.class);                List<Bean.ResultBean.DataBean> list = bean.getResult().getData();                //绑定适配器                    youhua = new Youhua(list);                    xlv.setAdapter(youhua);            }            @Override            protected String doInBackground(String... strings) {                try {                String url = strings[0];                String pn = strings[1];                String rn = strings[2];                    HttpURLConnection connection= (HttpURLConnection) new URL(url).openConnection();                    connection.setRequestMethod("POST");                    connection.setConnectTimeout(5000);                    connection.setReadTimeout(5000);                    //POST方法                    OutputStream os = connection.getOutputStream();                    os.write(("key=81921c6270f37eeec75be4081bd61e91&menu="                            + URLEncoder.encode("秘制红烧肉","utf-8")+"&pn="+pn+"&rn="+rn).getBytes());                    os.flush();                    int code = connection.getResponseCode();                    if (code == 200){                        InputStream is = connection.getInputStream();                        String shuju = Jiexi.shuju(is);                        return shuju;                    }                } catch (Exception e) {                    e.printStackTrace();                }                return null;            }        }.execute(data,pn,rn);    }    //适配器    class  Youhua extends BaseAdapter{        List<Bean.ResultBean.DataBean> list;        public Youhua(List<Bean.ResultBean.DataBean> list) {            this.list = list;        }        @Override        public int getCount() {            if (list != null){                return list.size();            }            return 0;        }        @Override        public Object getItem(int i) {            return null;        }        @Override        public long getItemId(int i) {            return 0;        }        @Override        public View getView(int i, View view, ViewGroup viewGroup) {            TextView tv = new TextView(MainActivity.this);            tv.setHeight(100);            tv.setText(list.get(i).getTags());            return tv;        }    }}