<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.bwie.xlistviewnetdemo.MainActivity">
<!--全包名导入-->
<com.bwie.xlistviewlibrary.view.XListView
android:id="@+id/xlv"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.constraint.ConstraintLayout>
布局文件代码
-----------------------------------------
package com.bwie.xlistviewnetdemo;
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.bwie.xlistviewlibrary.utils.NetWordUtils;
import com.bwie.xlistviewlibrary.view.XListView;
import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
import java.util.List;
/**
* 实现IXListView接口;
*/
public class MainActivity extends AppCompatActivity implements XListView.IXListViewListener{
String baseUrl = "http://api.expoon.com/AppNews/getNewsList/type/1/p/";
int page;
private XListView xListView;
List<Goods.DataBean> list = new ArrayList<>(); //大集合
private MAdapter mAdapter;
private ImageLoader imageLoaderInstances;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
xListView = (XListView) findViewById(R.id.xlv);
imageLoaderInstances = ImageLoader.getInstance();
mAdapter = new MAdapter();
xListView.setAdapter(mAdapter);
getNetData(0);
//设置xListView可以上拉加载更多功能
xListView.setPullLoadEnable(true);
//设置接口的实现类;this指的是MainActivity自己;类似button的点击事件;
//设置监听,
//设置监听,
//设置监听,
xListView.setXListViewListener(this);
}
/**
* 请求网络
*/
private void getNetData(int page) {
//baseUrl = http://api.expoon.com/AppNews/getNewsList/type/1/p/
// 拼接后 = http://api.expoon.com/AppNews/getNewsList/type/1/p/1
new MAsyncTask().execute(baseUrl+page);
}
/**
* 下拉刷新功能:请求服务器最新的数据
*/
@Override
public void onRefresh() {
// 清空集合
//重新请求数据的第一页
//更新适配器哦
list.clear();
getNetData(0);
}
/**
* 上拉加载更多的功能,
*/
@Override
public void onLoadMore() {
//请求新的数据,把数据放入到大集合中
//更新适配器
//停止刷新ui
page++;
getNetData(page);
}
private class MAdapter 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) {
View viewItem = View.inflate(MainActivity.this, R.layout.listview, null);
TextView textView = (TextView) viewItem.findViewById(R.id.textView);
ImageView imageView = (ImageView) viewItem.findViewById(R.id.imageView);
textView.setText(list.get(i).getNews_title());
imageLoaderInstances.displayImage(list.get(i).getPic_url(), imageView);
return viewItem;
}
}
private class MAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... strings) {
return NetWordUtils.getNetjson(strings[0]);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Gson gson = new Gson();
Goods goods = gson.fromJson(s, Goods.class);
List<Goods.DataBean> dataTemp = goods.getData();
list.addAll(dataTemp);
//更新适配器
mAdapter.notifyDataSetChanged();
//让刷新头和刷新底部 消失;
uiComplete();
}
}
/**
* 让xlistview的刷新头消失;
*/
private void uiComplete() {
xListView.stopRefresh(); //让刷新头消失
xListView.stopLoadMore(); //让上拉加载的ui消失;
xListView.setRefreshTime("刚刚");
}
}