XListView 的使用（上啦加载下拉刷新）（demo）

最新推荐文章于 2023-09-04 00:53:48 发布

Jonly_W

最新推荐文章于 2023-09-04 00:53:48 发布

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本文链接：https://blog.youkuaiyun.com/Jonly_W/article/details/78816091

本文介绍了一个自定义的XListView组件的使用方法，包括XML布局配置和Java代码实现。该组件支持下拉刷新和上拉加载更多功能，并通过异步任务进行数据加载。

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首先是XML 文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.bawei.xlistview.MainActivity">

   <com.bawei.wzq.wzlibrary.view.XListView
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:id="@+id/xlv"/>
</RelativeLayout>

接下来就是代码了

package com.bawei.xlistview;

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

import com.bawei.wzq.wzlibrary.view.XListView;
import com.google.gson.Gson;

import java.util.List;

public class MainActivity extends AppCompatActivity implements XListView.IXListViewListener{
    private String jsonurl = "http://www.yulin520.com/a2a/impressApi/news/mergeList?pageSize=10&page=";
    int count=1;
    private XListView lv;
    Myadapter adapter;
    private  List<User.DataBean> list;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        new AsyncTask<String, Integer, String>() {
            @Override
            protected String doInBackground(String... strings) {
                String getsjon = new Utlis().getsjon(jsonurl + count);
                return getsjon;
            
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                 list= new Gson().fromJson(s, User.class).getData();
                adapter=new Myadapter(MainActivity.this,list);
                lv.setAdapter(adapter);
            }
        }.execute();
    }

    private void initView() {
        lv = (XListView) findViewById(R.id.xlv);
        lv.setPullRefreshEnable(true);
        lv.setPullLoadEnable(true);
        lv.setXListViewListener(this);

    }
    public void stopall(){
        lv.stopLoadMore();
        lv.stopRefresh();
        lv.setRefreshTime("刚刚");
    }

    @Override
    public void onRefresh() {
        new AsyncTask<String, Integer, String>() {
            @Override
            protected String doInBackground(String... strings) {
                String getsjon = new Utlis().getsjon(jsonurl + count);
                return getsjon;

            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                list= new Gson().fromJson(s, User.class).getData();
                adapter=new Myadapter(MainActivity.this,list);
                lv.setAdapter(adapter);
                stopall();
            }
        }.execute();

    }

    @Override
    public void onLoadMore() {
        count++;
        new AsyncTask<String, Integer, String>() {
            @Override
            protected String doInBackground(String... strings) {
                String getsjon = new Utlis().getsjon(jsonurl + count);
                return getsjon;

            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                List<User.DataBean> been = new Gson().fromJson(s, User.class).getData();
                list.addAll(been);
               //刷新适配器
               adapter.notifyDataSetChanged();
                stopall();
            }
        }.execute();

    }
}