<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">
<!--全包名導入-->
<com.bwie.xlistviewlibrary.view.XListView
android:id="@+id/xlv"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.constraint.ConstraintLayout>
佈局文件代碼
-----------------------------------------
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;
/**
* 實現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);
//設置xListView可以上拉加載更多功能
xListView.setPullLoadEnable(true);
//設置接口的實現類;this指的是MainActivity自己;類似button的點擊事件;
//設置監聽,
//設置監聽,
//設置監聽,
xListView.setXListViewListener(this);
}
/**
* 請求網絡
*/
private void getNetData(int page) {
//baseUrl = http://api.expoon.com/AppNews/getNewsList/type/1/p/
// 拼接後 = http://api.expoon.com/AppNews/getNewsList/type/1/p/1
new MAsyncTask().execute(baseUrl+page);
}
/**
* 下拉刷新功能:請求服務器最新的數據
*/
@Override
public void onRefresh() {
// 清空集合
//重新請求數據的第一頁
//更新適配器哦
list.clear();
getNetData(0);
}
/**
* 上拉加載更多的功能,
*/
@Override
public void onLoadMore() {
//請求新的數據,把數據放入到大集合中
//更新適配器
//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);
//更新適配器
mAdapter.notifyDataSetChanged();
//讓刷新頭和刷新底部 消失;
uiComplete();
}
}
/**
* 讓xlistview的刷新頭消失;
*/
private void uiComplete() {
xListView.stopRefresh(); //讓刷新頭消失
xListView.stopLoadMore(); //讓上拉加載的ui消失;
xListView.setRefreshTime("剛剛");
}
}