XListView实现多条目网络数据刷新加载网络加载图片

2023-09-05 08:06:04 74

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

protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

pager=findViewById(R.id.viewpager);
group=findViewById(R.id.group);

li=newArrayList<>();
li.add(newAfragment());
li.add(newBfragment());
li.add(newCfragment());
li.add(newDfragment());

pager.setAdapter(newFragmentPagerAdapter(getSupportFragmentManager()){
@Override
publicFragmentgetItem(intposition){
returnli.get(position);
}

@Override
publicintgetCount(){
returnli.size();
}
});

group.setOnCheckedChangeListener(newRadioGroup.OnCheckedChangeListener(){
@Override
publicvoidonCheckedChanged(RadioGroupradioGroup,inti){

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

}

activity_main.xml

Afragment.java

publicclassAfragmentextendsFragment{
privateintpage=1;
privateXListViewlistView;
privateMyBaseAdapteradapter;
ResponseBeanresponseBean;

@Nullable
@Override
publicViewonCreateView(@NonNullLayoutInflaterinflater,@NullableViewGroupcontainer,@NullableBundlesavedInstanceState){
Viewview=View.inflate(getActivity(),R.layout.afrag,null);

listView=view.findViewById(R.id.xlv);
adapter=newMyBaseAdapter(getLayoutInflater());
listView.setAdapter(adapter);

listView.setPullLoadEnable(true);
listView.setXListViewListener(newXListView.IXListViewListener(){
@Override
publicvoidonRefresh(){
page=0;
loadData(page);
}

@Override
publicvoidonLoadMore(){
loadData(page);

}
});
loadData(page);
returnview;
}

privateStringurl=
"http://apis.juhe.cn/cook/query?key=3ec004200a6a2f4cf4774e480c006375&menu=%E8%A5%BF%E7%BA%A2%E6%9F%BF&rn=10&pn=";

privatevoidloadData(intpage){

StringurlString=url+page;
newAsyncTask>(){

@Override
protectedListdoInBackground(String...strings){
try{
URLurl=newURL(strings[0]);
HttpURLConnectionurlConnection=(HttpURLConnection)url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setReadTimeout(5000);
urlConnection.setConnectTimeout(5000);
intresponseCode=urlConnection.getResponseCode();
if(responseCode==200){
Stringresult=String2(urlConnection.getInputStream());
responseBean=newGson().fromJson(result,ResponseBean.class);
}else{

}
returnresponseBean==null?null:responseBean.getResult().getData();
}catch(MalformedURLExceptione){
e.printStackTrace();
}catch(IOExceptione){
e.printStackTrace();
}
returnnull;
}

@Override
protectedvoidonPostExecute(ListdataItems){
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);
}

privatevoidupdateData(ListdataItems){
if(page==0){
adapter.setDatas(dataItems);
}else{
adapter.addDatas(dataItems);

}

}

privatevoidloadCompleted(){
page++;
listView.stopRefresh();
listView.stopLoadMore();
}

privateStringString2(InputStreamstream){
StringBuildersb=newStringBuilder();
BufferedReaderreader=newBufferedReader(newInputStreamReader(stream));
try{
for(Stringtmp=reader.readLine();tmp!=null;tmp=reader.readLine()){
sb.append(tmp);
}
}catch(IOExceptione){
e.printStackTrace();
}
returnsb.toString();
}
}

MyBaseAdapter.java

publicclassMyBaseAdapterextendsBaseAdapter{

privateListdatas;
privateLayoutInflaterlayoutInflater;

publicMyBaseAdapter(LayoutInflaterlayoutInflater){
this.layoutInflater=layoutInflater;
datas=newArrayList<>();
}

publicvoidsetDatas(Listdatas){
datas.clear();
if(datas!=null){
datas.addAll(datas);
}
notifyDataSetChanged();
}

publicvoidaddDatas(ListdataItems){
if(dataItems!=null){
datas.addAll(dataItems);
notifyDataSetChanged();
}

}

publicfinalintVIEW_TYPE_COUNT=2;
publicfinalintIMAGE_TEXT_TYPE=0;
publicfinalintTEXT_TYPE=1;
@Override
publicintgetItemViewType(intposition){
if(position%2==0){
returnIMAGE_TEXT_TYPE;
}else{
returnTEXT_TYPE;
}

}

@Override
publicintgetViewTypeCount(){
returnVIEW_TYPE_COUNT;
}

@Override
publicintgetCount(){
returndatas.size();
}

@Override
publicObjectgetItem(inti){
returndatas.get(i);
}

@Override
publiclonggetItemId(inti){
returni;
}

@Override
publicViewgetView(inti,Viewview,ViewGroupviewGroup){

if(getItemViewType(i)==IMAGE_TEXT_TYPE){
ViewHolderviewHolder=null;
if(view==null){
view=layoutInflater.inflate(R.layout.item,viewGroup,false);
viewHolder=newViewHolder(view);

}else{
viewHolder=(ViewHolder)view.getTag();
}
viewHolder.bindData((DataItem)getItem(i));
}else{
ViewHolder2viewHolder2;
if(view==null){
view=layoutInflater.inflate(R.layout.item_text,viewGroup,false);
viewHolder2=newViewHolder2();
viewHolder2.textView=view.findViewById(R.id.text);
view.setTag(viewHolder2);
}else{
viewHolder2=(ViewHolder2)view.getTag();
}

viewHolder2.textView.setText(datas.get(i).getTitle());
}

returnview;
}


publicclassViewHolder{
privateImageViewicon;
privateTextViewtitle;
privateTextViewdate;


publicViewHolder(Viewview){
icon=view.findViewById(R.id.icon);
title=view.findViewById(R.id.title);
date=view.findViewById(R.id.date);

view.setTag(this);
}

publicvoidbindData(DataItemitem){
title.setText(item.getTitle());
date.setText(item.getId());

ImageLoader.getInstance().displayImage(item.getFirst(),icon
,ImageloaderConfigs.getDefult(icon.getContext()));
}
}

publicclassViewHolder2{
TextViewtextView;

}

}

ImageLoaderConfigs.java

publicclassImageloaderConfigs{
publicstaticImageLoaderConfigurationgetImageLoader(Contextcontext){
ImageLoaderConfigurationconfiguration=newImageLoaderConfiguration.Builder(context)
.memoryCacheSizePercentage(13)
.diskCacheSize(50*1024*1024)
.defaultDisplayImageOptions(DisplayImageOptions.createSimple())
.writeDebugLogs()
.build();
returnconfiguration;
}

publicstaticDisplayImageOptionsgetDefult(Contextcontext){
DisplayImageOptionsimageOptions=newDisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheOnDisk(true)
.bitmapConfig(Bitmap.Config.RGB_565)
.imageScaleType(ImageScaleType.EXACTLY_STRETCHED)
.displayer(newCircleBitmapDisplayer())
.build();
returnimageOptions;
}

}

App.java

publicclassAppextendsApplication{
@Override
publicvoidonCreate(){
super.onCreate();
ImageLoader.getInstance().init(ImageloaderConfigs.getImageLoader(this));
}
}

ResponsBean.java

publicclassResponseBean{
privateintresultcode;
privateStringreason;
privateResultresult;

publicintgetResultcode(){
returnresultcode;
}

publicStringgetReason(){
returnreason;
}

publicResultgetResult(){
returnresult;
}

publicclassResult{
privateListdata;

publicListgetData(){
returndata;
}
}
}

DataItem.java

publicclassDataItem{
privateStringid;
privateStringtitle;
privateListalbums;

publicStringgetId(){
returnid;
}

publicStringgetTitle(){
returntitle;
}

publicListgetAlbums(){
returnalbums;
}
publicStringgetFirst(){
returnalbums==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毛票票。

XListView实现多条目网络数据刷新加载 网络加载图片

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