package com.example.a1.app_demo;
import android.os.AsyncTask;
import android.support.annotation.NonNull;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import com.google.gson.Gson;
import java.io.BufferedInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.math.MathContext;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import me.maxwin.view.XListView;
public class MainActivity extends AppCompatActivity {
private XListView contexts;
private MyActivity myActivity;
String aur="http://api.expoon.com/AppNews/getNewsList/type/1/p?";
private List<User.DataBean> list=new ArrayList<>();
private List<User.DataBean> data;
private int page;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DrawerLayout draw=findViewById(R.id.draw);
contexts=findViewById(R.id.contents);
myActivity=new MyActivity(this,list);
contexts.setAdapter(myActivity);
draw.addDrawerListener(new DrawerLayout.DrawerListener() {
@Override
public void onDrawerSlide(@NonNull View view, float v) {
}
@Override
public void onDrawerOpened(@NonNull View view) {
}
@Override
public void onDrawerClosed(@NonNull View view) {
}
@Override
public void onDrawerStateChanged(int i) {
}
});
//
contexts.setPullLoadEnable(true);
contexts.setXListViewListener(new XListView.IXListViewListener() {
@Override
public void onRefresh() {
page=1;
indata();
}
@Override
public void onLoadMore() {
indata();
}
});
page=1;
indata();
}
private void indata(){
new lian().execute(aur+page);
}
class lian extends AsyncTask<String,Void,ArrayList<User.DataBean>>{
@Override
protected ArrayList<User.DataBean> doInBackground(String... strings) {
try {
URL url=new URL(strings[0]);
HttpURLConnection urlConnection= (HttpURLConnection) url.openConnection();
if (urlConnection.getResponseCode()==200){
final InputStream inputStream = urlConnection.getInputStream();
Gson gson=new Gson();
final User user = gson.fromJson(new InputStreamReader(new BufferedInputStream(inputStream)), User.class);
final List<User.DataBean> data = user.getData();
return (ArrayList<User.DataBean>) data;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(ArrayList<User.DataBean> dataBeans) {
super.onPostExecute(dataBeans);
if (data==null){
contexts.stopLoadMore();
contexts.stopRefresh();
}if (page==1){
myActivity.setList(dataBeans);
}else{
list.addAll(dataBeans);
}
contexts.stopRefresh();
contexts.stopLoadMore();
page++;
}
}
}
MyActivity
package com.example.a1.app_demo;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
import java.util.IllegalFormatCodePointException;
import java.util.List;
public class MyActivity extends BaseAdapter {
private Context context;
private List<User.DataBean> list;
public MyActivity(Context context, List<User.DataBean> list) {
this.context = context;
this.list=list;
}
public void setList(List<User.DataBean> List){
if (list!=null){
this.list=list;
}
notifyDataSetChanged();
}
public void addDatas(List<User.DataBean> list1){
if (list1!=null){
list.addAll(list1);
}
notifyDataSetChanged();
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView==null){
viewHolder=new ViewHolder();
convertView=LayoutInflater.from(context).inflate(R.layout.pop,parent,false);
viewHolder.image=convertView.findViewById(R.id.image);
viewHolder.name=convertView.findViewById(R.id.name);
viewHolder.price=convertView.findViewById(R.id.price);
convertView.setTag(viewHolder);
}else{
viewHolder= (ViewHolder) convertView.getTag();
}
viewHolder.name.setText(list.get(position).getNews_summary());
viewHolder.price.setText(list.get(position).getNews_title());
final DisplayImageOptions options = new DisplayImageOptions.Builder().build();
ImageLoader.getInstance().displayImage(list.get(position).getPic_url(),viewHolder.image,options);
return convertView;
}
class ViewHolder{
TextView name,price;
ImageView image;
}
}