XListView实现多条目网络数据刷新加载 网络加载图片

本文实例为大家分享了xlistview实现刷新加载的具体代码，供大家参考，具体内容如下

mainactivity.java

protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_main);

 pager = findviewbyid(r.id.viewpager);
 group = findviewbyid(r.id.group);

 li = new arraylist<>();
 li.add(new afragment());
 li.add(new bfragment());
 li.add(new cfragment());
 li.add(new dfragment());

 pager.setadapter(new fragmentpageradapter(getsupportfragmentmanager()) {
  @override
  public fragment getitem(int position) {
  return li.get(position);
  }

  @override
  public int getcount() {
  return li.size();
  }
 });

 group.setoncheckedchangelistener(new radiogroup.oncheckedchangelistener() {
  @override
  public void oncheckedchanged(radiogroup radiogroup, int i) {

  switch (i){
   case r.id.r1:
   pager.setcurrentitem(0);
   break;
   case r.id.r2:
   pager.setcurrentitem(1);
   break;
   case r.id.r3:
   pager.setcurrentitem(2);
   break;
   case r.id.r4:
   pager.setcurrentitem(3);
   break;
  }
  }
 });

 }

activity_main.xml

 <?xml version="1.0" encoding="utf-8"?>
 <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=".ui.mainactivity">
 <linearlayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 >
 <android.support.v4.view.viewpager
  android:id="@+id/viewpager"
  android:layout_width="match_parent"
  android:layout_height="0dp"
  android:layout_weight="9"
  >
 
 </android.support.v4.view.viewpager>
 
 <radiogroup
  android:id="@+id/group"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:orientation="horizontal"
  >
  <radiobutton
  android:id="@+id/r1"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:button="@null"
  android:gravity="center"
  android:layout_weight="1"
  android:text="afrag"/>
  <radiobutton
  android:id="@+id/r2"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:button="@null"
  android:gravity="center"
  android:layout_weight="1"
  android:text="bfrag"/>
  <radiobutton
  android:id="@+id/r3"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:button="@null"
  android:gravity="center"
  android:layout_weight="1"
  android:text="cfrag"/>
  <radiobutton
  android:id="@+id/r4"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:button="@null"
  android:gravity="center"
  android:layout_weight="1"
  android:text="dfrag"/>
 
 </radiogroup>
 
 </linearlayout>
 
</android.support.constraint.constraintlayout>

afragment.java

public class afragment extends fragment{
 private int page=1;
 private xlistview listview;
 private mybaseadapter adapter;
 responsebean responsebean;
 
 @nullable
 @override
 public view oncreateview(@nonnull layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {
  view view = view.inflate(getactivity(), r.layout.afrag, null);
 
  listview = view.findviewbyid(r.id.xlv);
  adapter = new mybaseadapter(getlayoutinflater());
  listview.setadapter(adapter);
 
  listview.setpullloadenable(true);
  listview.setxlistviewlistener(new xlistview.ixlistviewlistener() {
  @override
  public void onrefresh() {
   page=0;
   loaddata(page);
  }
 
  @override
  public void onloadmore() {
   loaddata(page);
 
  }
  });
  loaddata(page);
  return view;
 }
 
 private string url =
  "http://apis.juhe.cn/cook/query?key=3ec004200a6a2f4cf4774e480c006375&menu=%e8%a5%bf%e7%ba%a2%e6%9f%bf&rn=10&pn=";
 
 private void loaddata(int page){
 
  string urlstring=url+page;
  new asynctask<string,void,list<dataitem>>(){
 
  @override
  protected list<dataitem> doinbackground(string... strings) {
   try {
   url url = new url(strings[0]);
   httpurlconnection urlconnection = (httpurlconnection) url.openconnection();
   urlconnection.setrequestmethod("get");
   urlconnection.setreadtimeout(5000);
   urlconnection.setconnecttimeout(5000);
   int responsecode = urlconnection.getresponsecode();
   if (responsecode==200){
    string result=string2(urlconnection.getinputstream());
    responsebean = new gson().fromjson(result, responsebean.class);
   }else {
 
   }
   return responsebean == null ?null:responsebean.getresult().getdata();
   } catch (malformedurlexception e) {
   e.printstacktrace();
   } catch (ioexception e) {
   e.printstacktrace();
   }
   return null;
  }
 
  @override
  protected void onpostexecute(list<dataitem> dataitems) {
   super.onpostexecute(dataitems);
   if (dataitems == null) {
   toast.maketext(getactivity(), "请求数据错误", toast.length_long).show();
   return;
   }
   updatedata(dataitems);
   loadcompleted();
 
  }
  }.execute(urlstring);
 }
 
 private void updatedata(list<dataitem> dataitems){
  if (page==0){
  adapter.setdatas(dataitems);
  }else {
  adapter.adddatas(dataitems);
 
  }
 
 }
 
 private void loadcompleted(){
  page++;
  listview.stoprefresh();
  listview.stoploadmore();
 }
 
 private string string2(inputstream stream){
  stringbuilder sb = new stringbuilder();
  bufferedreader reader = new bufferedreader(new inputstreamreader(stream));
  try {
  for (string tmp=reader.readline();tmp!=null;tmp=reader.readline()){
   sb.append(tmp);
  }
  } catch (ioexception e) {
  e.printstacktrace();
  }
  return sb.tostring();
 }
 }

mybaseadapter.java

public class mybaseadapter extends baseadapter{

 private list<dataitem> datas;
 private layoutinflater layoutinflater;

 public mybaseadapter(layoutinflater layoutinflater) {
 this.layoutinflater = layoutinflater;
 datas=new arraylist<>();
 }

 public void setdatas(list<dataitem> datas) {
 datas.clear();
 if (datas!=null){
  datas.addall(datas);
 }
 notifydatasetchanged();
 }

 public void adddatas(list<dataitem> dataitems) {
 if (dataitems!=null){
  datas.addall(dataitems);
  notifydatasetchanged();
 }

 }

 public final int view_type_count=2;
 public final int image_text_type=0;
 public final int text_type=1;
 @override
 public int getitemviewtype(int position) {
 if (position % 2==0){
  return image_text_type;
 }else {
  return text_type;
 }

 }

 @override
 public int getviewtypecount() {
 return view_type_count;
 }

 @override
 public int getcount() {
 return datas.size();
 }

 @override
 public object getitem(int i) {
 return datas.get(i);
 }

 @override
 public long getitemid(int i) {
 return i;
 }

 @override
 public view getview(int i, view view, viewgroup viewgroup) {

 if (getitemviewtype(i)==image_text_type){
  viewholder viewholder=null;
  if (view==null){
  view = layoutinflater.inflate(r.layout.item, viewgroup,false);
  viewholder = new viewholder(view);

  }else {
  viewholder = (viewholder) view.gettag();
  }
  viewholder.binddata((dataitem) getitem(i));
 }else {
  viewholder2 viewholder2;
  if (view==null){
  view = layoutinflater.inflate(r.layout.item_text, viewgroup, false);
  viewholder2 = new viewholder2();
  viewholder2.textview = view.findviewbyid(r.id.text);
  view.settag(viewholder2);
  }else {
  viewholder2 = (viewholder2) view.gettag();
  }

  viewholder2.textview.settext(datas.get(i).gettitle());
 }

 return view;
 }


 public class viewholder{
 private imageview icon;
 private textview title;
 private textview date;


 public viewholder(view view) {
  icon = view.findviewbyid(r.id.icon);
  title = view.findviewbyid(r.id.title);
  date = view.findviewbyid(r.id.date);

  view.settag(this);
 }

 public void binddata(dataitem item) {
  title.settext(item.gettitle());
  date.settext(item.getid());

  imageloader.getinstance().displayimage(item.getfirst(),icon
   , imageloaderconfigs.getdefult(icon.getcontext()));
 }
 }

 public class viewholder2{
 textview textview;

 }

}

imageloaderconfigs.java

public class imageloaderconfigs {
 public static imageloaderconfiguration getimageloader(context context){
 imageloaderconfiguration configuration = new imageloaderconfiguration.builder(context)
  .memorycachesizepercentage(13)
  .diskcachesize(50*1024*1024)
  .defaultdisplayimageoptions(displayimageoptions.createsimple())
  .writedebuglogs()
  .build();
 return configuration;
 }

 public static displayimageoptions getdefult(context context){
 displayimageoptions imageoptions = new displayimageoptions.builder()
  .cacheinmemory(true)
  .cacheondisk(true)
  .bitmapconfig(bitmap.config.rgb_565)
  .imagescaletype(imagescaletype.exactly_stretched)
  .displayer(new circlebitmapdisplayer())
  .build();
 return imageoptions;
 }

}

app.java

public class app extends application{
 @override
 public void oncreate() {
 super.oncreate();
 imageloader.getinstance().init(imageloaderconfigs.getimageloader(this));
 }
}

responsbean.java

public class responsebean {
 private int resultcode;
 private string reason;
 private result result;

 public int getresultcode() {
 return resultcode;
 }

 public string getreason() {
 return reason;
 }

 public result getresult() {
 return result;
 }

 public class result{
 private list<dataitem> data;

 public list<dataitem> getdata() {
  return data;
 }
 }
}

dataitem.java

public class dataitem {
 private string id;
 private string title;
 private list<string> albums;

 public string getid() {
 return id;
 }

 public string gettitle() {
 return title;
 }

 public list<string> getalbums() {
 return albums;
 }
 public string getfirst(){
 return albums==null || albums.size()==0? "" : albums.get(0);
 }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。