如何实现无限滚动列表视图
Posted
技术标签:
【中文标题】如何实现无限滚动列表视图【英文标题】：How to implement endless scrolling listview 【发布时间】：2015-09-13 03:56:18 【问题描述】：我正在创建一个应用程序，我在其中使用 Json 解析来解析数据。我已经实现了 listview，在我的回复中我有 totalpage 和 current page 对象，
新用户将从第一页获取项目。当用户在列表视图中滚动时，列表会随着来自下一页（以及下一个和下一个等）的项目展开。
这是我的回应 http://pastie.org/10259792
以下是我试过的代码：
首页片段
public class HomeFragment extends Fragment
// Listview Adapter
ListViewAdapter adapters;
// Connection detector
ConnectionDetector cd;
// Alert dialog manager
AlertDialogManager alert = new AlertDialogManager();
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONparserr jsonParser = new JSONparserr();
ArrayList<HashMap<String, String>> WebsiteList;
// albums JSONArray
JSONArray data = null;
String link_url;
ArrayList<HashMap<String, String>> arrayTemplist;
private AutoCompleteTextView inputSearch;
private ListView lv;
private static final String URL_ALBUMS = "";
private static final String WEBSITE_MENU_ID ="Brand_name";
private static final String TAG_MATCH="data";
//private static final String TAG_NAME="Brand_name";
private static final String TAG_PROFILE="id";
private static final String TAG_CAST="Company";
public HomeFragment()
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
lv = (ListView)rootView.findViewById(R.id.listpehlu);
cd = new ConnectionDetector(getActivity());
WebsiteList = new ArrayList<HashMap<String, String>>();
// Loading Albums JSON in Background Thread
new LoadAlbums().execute();
// get listview
inputSearch = (AutoCompleteTextView)rootView.findViewById(R.id.autoCompleteTextViewhomefrag);
inputSearch.addTextChangedListener(new TextWatcher()
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3)
arrayTemplist= new ArrayList<HashMap<String,String>>();
String searchString =inputSearch.getText().toString().toLowerCase();
for (int i = 0; i < WebsiteList.size(); i++)
String currentString =WebsiteList.get(i).get(HomeFragment.this.WEBSITE_MENU_ID);
if (currentString.toLowerCase().startsWith(searchString ))
arrayTemplist.add(WebsiteList.get(i));
for (int i = 0; i < arrayTemplist.size(); i++)
String currentstrin = arrayTemplist.get(i).get(HomeFragment.this.WEBSITE_MENU_ID);
//Toast.makeText(getApplicationContext(), currentstrin, Toast.LENGTH_LONG).show();
SimpleAdapter adapters = new SimpleAdapter(getActivity(), arrayTemplist,R.layout.list_item_match, new String[] WEBSITE_MENU_ID,TAG_CAST
, new int[]
R.id.txtbrndnm,R.id.txtbrndcomp);
lv.setAdapter(adapters);
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3)
// TODO Auto-generated method stub
@Override
public void afterTextChanged(Editable arg0)
// TODO Auto-generated method stub
);
lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> arg0, View view, int position,
long arg3)
Selected_Product_Listing tf = new Selected_Product_Listing();
Bundle bundle = new Bundle();
bundle.putString("prducts_name", WebsiteList.get(position).get((WEBSITE_MENU_ID)));
// bundle.putString("prducts_name", aList.get(position).get(INTEREST_ACCEPT_NAME));
tf.setArguments(bundle);
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.frame_container, tf);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
// Toast.makeText(getActivity(),"lets"+ WebsiteList.get(position).get(convertToBase64(convertToBase64(WEBSITE_MENU_ID))), Toast.LENGTH_LONG).show();
);
lv.setOnScrollListener(new OnScrollListener()
public void onScrollStateChanged(AbsListView view, int scrollState)
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount)
if(firstVisibleItem+visibleItemCount == totalItemCount && totalItemCount!=0)
);
return rootView;
public String convertToBase64(String text)
byte[] data = null;
try
data = text.getBytes("UTF-8");
catch (UnsupportedEncodingException e)
e.printStackTrace();
return Base64.encodeToString(data, Base64.DEFAULT);
class LoadAlbums extends AsyncTask<String, String, String>
private JSONObject jsonObj;
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute()
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(true);
pDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.custom_progress));
pDialog.setCancelable(false);
pDialog.show();
protected String doInBackground(String... args)
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
String json = jsonParser.makeHttpRequest(URL_ALBUMS, "GET",
params);
// Check your log cat for JSON reponse
Log.d("Albums JSON: ", "> " + json);
if (json != null)
try
jsonObj = new JSONObject(json);
// Getting JSON Array node
data = jsonObj.getJSONArray(TAG_MATCH);
String totpage=jsonObj.getString("total_page");
System.out.println("Total Page"+totpage);
String curpage=jsonObj.getString("current_page");
System.out.println("Total Page"+curpage);
// looping through All Contacts
for (int i = 0; i < data.length(); i++)
JSONObject c = data.getJSONObject(i);
HashMap<String, String> map = new HashMap<String, String>();
map.put(WEBSITE_MENU_ID,c.getString(WEBSITE_MENU_ID));
map.put(TAG_PROFILE, c.getString(TAG_PROFILE));
map.put(TAG_CAST, c.getString(TAG_CAST));
WebsiteList.add(map);
catch (JSONException e)
e.printStackTrace();
else
Log.e("ServiceHandler", "Couldn't get any data from the url");
return null;
protected void onPostExecute(String file_url)
// dismiss the dialog after getting all albums
pDialog.dismiss();
// updating UI from Background Thread
ListAdapter adapter = new SimpleAdapter(
getActivity(), WebsiteList,
R.layout.list_item_match, new String[] WEBSITE_MENU_ID,TAG_CAST
, new int[]
R.id.txtbrndnm,R.id.txtbrndcomp);
lv.setAdapter(adapter);
无尽适配器
public class EndLessAdapter extends ArrayAdapter<String>
private Context context;
private List<String> items;
private int layoutId;
public EndLessAdapter(Context context, List<String> items, int LayoutId)
super(context,LayoutId,items);
this.context = context;
this.items = items;
this.layoutId = LayoutId;
@Override
public View getView(int position, View convertView, ViewGroup parent)
if(convertView == null)
convertView = ((LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(layoutId,parent,false);
TextView tView = (TextView)convertView.findViewById(R.id.txt);
tView.setText(items.get(position));
return convertView;
EndlessLisView
public class EndlessListView extends ListView implements OnScrollListener
private Context context;
private View footer;
private boolean isLoading;
private EndLessListener listener;
private BaseAdapter adapter;
public EndlessListView(Context context, AttributeSet attrs, int defStyle)
super(context, attrs, defStyle);
this.setOnScrollListener(this);
this.context = context;
public EndlessListView(Context context, AttributeSet attrs)
super(context, attrs);
this.setOnScrollListener(this);
this.context = context;
public EndlessListView(Context context)
super(context);
this.setOnScrollListener(this);
this.context = context;
@Override
public void onScrollStateChanged(AbsListView view, int scrollState)
// 4
public void addNewData()
this.removeFooterView(footer);
// adapter.addAll(products);
adapter.notifyDataSetChanged();
isLoading = false;
public void setLoading()
isLoading = false;
@Override
public void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount)
if(getAdapter() == null)
return;
if(getAdapter().getCount() == 0)
return;
int l = visibleItemCount + firstVisibleItem;
System.out.println("List View Total Item Count = "+totalItemCount+" , l = "+l+", is_loading = "+isLoading);
if(l >= totalItemCount && !isLoading)
// add footer layout
this.addFooterView(footer);
// set progress boolean
isLoading = true;
System.out.println("$$$$$$$$$ call loaddata $$$$$$$$$$$");
// call interface method to load new data
listener.loadData();
// Calling order from MainActivity
// 1
public void setLoadingView(int resId)
footer = ((LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(resId, null); // footer = (View)inflater.inflate(resId, null);
this.addFooterView(footer);
System.out.println("addfooter ====@@@@@@");
// 2
public void setListener(EndLessListener listener)
this.listener = listener;
// 3
public void setAdapter(BaseAdapter adapter)
super.setAdapter(adapter);
this.adapter = adapter;
this.removeFooterView(footer);
public void removeFooter()
this.removeFooterView(footer);
【问题讨论】：
那么，你的问题是什么？你遇到了什么错误？ 在此处出现错误应用程序崩溃 listener.loadData(); 查看 ViewHolder 模式 @EpicPandaForce 我想得到你 @Roman 您尝试实现的内容称为延迟加载或分页。您能否发布处理此问题的整个代码？ 【参考方案1】：您可以通过使用 Github 中的以下库来实现此目的
https://github.com/nicolasjafelle/PagingListView
简单地创建您的PagingAdapter 并将其添加到com.paging.listview.PagingListView。
您必须实现新的 Pagingable 接口及其onLoadMoreItems() 方法。例如：
listView.setHasMoreItems(true);
listView.setPagingableListener(new PagingListView.Pagingable()
@Override
public void onLoadMoreItems()
if (pager < 3)
new CountryAsyncTask(false).execute();
else
listView.onFinishLoading(false, null);
);
终于可以使用onFinishLoading(boolean hasMoreItems, List newItems)方法更新列表了。
listView.onFinishLoading(true, newItems);
还记得在你的布局文件中使用这个包：
<com.paging.listview.PagingListView
android:id="@+id/paging_list_view"
android:layout_
android:layout_/>
【讨论】：
你能告诉***.com/questions/31847086/… @roman :- 你可以看看答案***.com/questions/31847086/…【参考方案2】：你好在这里你可以找到延迟加载的nostra库然后你可以 实现以下惰性加载示例
https://github.com/nostra13/Android-Universal-Image-Loader
你可以使用下面的实现延迟加载
代码
让我们开始编写关于延迟加载的代码。
MainActivity.java
package com.sunil.lazyloading;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener
private Button btnlist=null;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnlist= (Button)findViewById(R.id.button_listview);
btnlist.setOnClickListener(this);
@Override
public void onClick(View arg0)
Intent intent = new Intent(this, ImageListActivity.class);
intent.putExtra("stringarrayimage", Constants.IMAGES);
startActivity(intent);
CustomAdapter.java
package com.sunil.adapter;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageLoadingListener;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;
import com.sunil.lazyloading.R;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class CustomAdapter extends BaseAdapter
private String imageurl[]=null;
private Context context=null;
DisplayImageOptions doption=null;
private ImageLoadingListener animateFirstListener =null;
public CustomAdapter(Activity activity, String[] imageurl)
this.context=activity;
this.imageurl=imageurl;
doption=new DisplayImageOptions.Builder().showImageForEmptyUri(R.drawable.ic_empty).showImageOnFail(R.drawable.ic_error).showStubImage(R.drawable.ic_stub).cacheInMemory(true).cacheOnDisc(true).displayer(new RoundedBitmapDisplayer(20)).build();
animateFirstListener = new AnimateFirstDisplayListener();
@Override
public int getCount()
return imageurl.length;
@Override
public Object getItem(int arg0)
return arg0;
@Override
public long getItemId(int arg0)
return arg0;
@Override
public View getView(int position, View convertView, ViewGroup parent)
View view = convertView;
final ViewHolder holder;
if (convertView == null)
view = ((Activity) context).getLayoutInflater().inflate(R.layout.item_list_row, parent, false);
holder = new ViewHolder();
holder.text = (TextView) view.findViewById(R.id.text);
holder.image = (ImageView) view.findViewById(R.id.image);
view.setTag(holder);
else
holder = (ViewHolder) view.getTag();
holder.text.setText("Item " + (position + 1));
ImageLoader imageLoader = ImageLoader.getInstance();
imageLoader.displayImage(imageurl[position], holder.image, doption, animateFirstListener);
return view;
private static class AnimateFirstDisplayListener extends SimpleImageLoadingListener
static final List<string> displayedImages = Collections.synchronizedList(new LinkedList<string>());
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage)
if (loadedImage != null)
ImageView imageView = (ImageView) view;
boolean firstDisplay = !displayedImages.contains(imageUri);
if (firstDisplay)
FadeInBitmapDisplayer.animate(imageView, 500);
displayedImages.add(imageUri);
private class ViewHolder
public TextView text;
public ImageView image;
</string></string>
ImageListActivity.java
package com.sunil.lazyloading;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
MainActivity.java
package com.sunil.lazyloading;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener
private Button btnlist=null;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnlist= (Button)findViewById(R.id.button_listview);
btnlist.setOnClickListener(this);
@Override
public void onClick(View arg0)
Intent intent = new Intent(this, ImageListActivity.class);
intent.putExtra("stringarrayimage", Constants.IMAGES);
startActivity(intent);
CustomAdapter.java
package com.sunil.adapter;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageLoadingListener;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;
import com.sunil.lazyloading.R;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class CustomAdapter extends BaseAdapter
private String imageurl[]=null;
private Context context=null;
DisplayImageOptions doption=null;
private ImageLoadingListener animateFirstListener =null;
public CustomAdapter(Activity activity, String[] imageurl)
this.context=activity;
this.imageurl=imageurl;
doption=new DisplayImageOptions.Builder().showImageForEmptyUri(R.drawable.ic_empty).showImageOnFail(R.drawable.ic_error).showStubImage(R.drawable.ic_stub).cacheInMemory(true).cacheOnDisc(true).displayer(new RoundedBitmapDisplayer(20)).build();
animateFirstListener = new AnimateFirstDisplayListener();
@Override
public int getCount()
return imageurl.length;
@Override
public Object getItem(int arg0)
return arg0;
@Override
public long getItemId(int arg0)
return arg0;
@Override
public View getView(int position, View convertView, ViewGroup parent)
View view = convertView;
final ViewHolder holder;
if (convertView == null)
view = ((Activity) context).getLayoutInflater().inflate(R.layout.item_list_row, parent, false);
holder = new ViewHolder();
holder.text = (TextView) view.findViewById(R.id.text);
holder.image = (ImageView) view.findViewById(R.id.image);
view.setTag(holder);
else
holder = (ViewHolder) view.getTag();
holder.text.setText("Item " + (position + 1));
ImageLoader imageLoader = ImageLoader.getInstance();
imageLoader.displayImage(imageurl[position], holder.image, doption, animateFirstListener);
return view;
private static class AnimateFirstDisplayListener extends SimpleImageLoadingListener
static final List<string> displayedImages = Collections.synchronizedList(new LinkedList<string>());
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage)
if (loadedImage != null)
ImageView imageView = (ImageView) view;
boolean firstDisplay = !displayedImages.contains(imageUri);
if (firstDisplay)
FadeInBitmapDisplayer.animate(imageView, 500);
displayedImages.add(imageUri);
private class ViewHolder
public TextView text;
public ImageView image;
</string></string>
ImageListActivity.java
package com.sunil.lazyloading;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
import com.sunil.adapter.CustomAdapter;
public class ImageListActivity extends Activity implements OnItemClickListener
private ListView listview=null;
private String[] imageUrls;
protected ImageLoader imageLoader=null;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.imagelist);
listview=(ListView)findViewById(R.id.listView_image);
imageLoader = ImageLoader.getInstance();
Bundle bundle = getIntent().getExtras();
imageUrls = bundle.getStringArray("stringarrayimage");
CustomAdapter adapter=new CustomAdapter(ImageListActivity.this, imageUrls);
listview.setAdapter(adapter);
listview.setOnItemClickListener(this);
@Override
public void onItemClick(AdapterView arg0, View arg1, int position, long arg3)
Intent intent = new Intent(this, ImagePagerActivity.class);
intent.putExtra("imageurlpostion", imageUrls);
intent.putExtra("imagepostion", position);
startActivity(intent);
@Override
public void onBackPressed()
AnimateFirstDisplayListener.displayedImages.clear();
super.onBackPressed();
private static class AnimateFirstDisplayListener extends SimpleImageLoadingListener
static final List<string> displayedImages = Collections.synchronizedList(new LinkedList<string>());
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage)
if (loadedImage != null)
ImageView imageView = (ImageView) view;
boolean firstDisplay = !displayedImages.contains(imageUri);
if (firstDisplay)
FadeInBitmapDisplayer.animate(imageView, 500);
displayedImages.add(imageUri);
@Override
public boolean onCreateOptionsMenu(Menu menu)
getMenuInflater().inflate(R.menu.main, menu);
return true;
@Override
public boolean onOptionsItemSelected(MenuItem item)
switch (item.getItemId())
case R.id.item_clear_memory_cache:
imageLoader.clearMemoryCache();
return true;
case R.id.item_clear_disc_cache:
imageLoader.clearDiscCache();
return true;
default:
return false;
activity_main.xml
<button android:id="@+id/button_listview" android:layout_ android:layout_ android:text="ListView ImageLoad">
imagelist.xml
<listview android:id="@+id/listView_image" android:layout_ android:layout_>
</listview>
item_list_row.xml
<imageview android:adjustviewbounds="true" android:contentdescription="@string/descr_image" android:id="@+id/image" android:layout_ android:layout_margin="3dip" android:layout_ android:scaletype="centerCrop">
<textview android:id="@+id/text" android:layout_gravity="left|center_vertical" android:layout_ android:layout_marginleft="20dip" android:layout_ android:textsize="22sp">
对于上面的示例，您需要下载库通用图像加载器，您可以下载库...快乐编码:)
【讨论】：
【参考方案3】：您没有在 Fragment 中使用 EndlessListView。当我查看您的回复时，它包括分页。因此，您需要使用页码请求才能使用无限滚动。
这只是 Endless Listview 的流程。如果您的代码仍然无法运行，希望您在阅读此消息后能够学习示例项目。我只添加了你需要的部分。谢谢
无限滚动仅在列表视图上显示有限的数据。当用户向下滚动到底部时，它将从服务器获取下一个有限的数据。因此，您需要在请求中添加 current_page 参数。我不确切知道你的api。
首先，你需要用 0 初始化的 current_page 变量
您必须知道何时停止。您的回复有 total_page 字段。保存并添加验证
然后您需要知道何时请求下一页。为此，您已经在 EndlessListView 的 onScroll 中有代码。该代码计算并告诉用户何时向下滚动到底部并调用
listener.loadData();
请求新数据。但是您仍然需要为此添加侦听器。你已经有了
public void setListener(EndLessListener listener)
this.listener = listener;
您需要创建名为 EndlessListener 的 Interface 并在您的片段中实现。 EndlessListener 接口将包含向服务器请求的 loadData() 函数。之后，您需要为列表视图添加侦听器。
endlessListView.setListener(this);
【讨论】：
我正在尝试的是......默认情况下，我正在获取当前页面 0 的数据，当用户滚动时......它应该加载当前页面 1 的数据 是的，请求成功后需要增加页面。 哪个聊天室？可以帮忙。 在***中 @Roman，我认为这篇文章回答了你的一些问题。 EndlessListView 中已经有了 OnScroll 侦听器。我认为这是一个容易解决的问题。如果您决定使用另一个库，正如另一个建议的那样，它可能运行良好，您可能需要重新设计一些代码。【参考方案4】：当列表视图结束时尝试加载数据。在您的片段中实现 OnScrollListener。参考这个链接Android - ListView to load more items when reached end
【讨论】：
在 info.androidhive.slidingmenu.endless.EndlessListView.onScroll(EndlessListView.java:81) 处获得空指针异常【参考方案5】：您必须使用Paging 3 library 以最简单的方式解决所有问题。
【讨论】：
【参考方案6】：ListView XMl：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical" >
<ListView
android:id="@+id/orderlistview"
android:layout_
android:layout_
android:layout_gravity="center"
/>
</LinearLayout>
OrderList 类
public class OrderList
int _orderId;
int _orderincrement_id;
String _orderstatus;
String _orderdate;
String _ordership_to;
String _ordertotal;
String _ordercurrency_symbol;
// Empty constructor
public OrderList()
// constructor
public OrderList(int _orderId, int _orderincrement_id, String _orderstatus,
String _orderdate, String _ordership_to, String _ordertotal,
String _ordercurrency_symbol)
this._orderId = _orderId;
this._orderincrement_id = _orderincrement_id;
this._orderstatus = _orderstatus;
this._orderdate = _orderdate;
this._ordership_to = _ordership_to;
this._ordertotal = _ordertotal;
this._ordercurrency_symbol = _ordercurrency_symbol;
public int get_orderId()
return _orderId;
public void set_orderId(int _orderId)
this._orderId = _orderId;
public int get_orderincrement_id()
return _orderincrement_id;
public void set_orderincrement_id(int _orderincrement_id)
this._orderincrement_id = _orderincrement_id;
public String get_orderstatus()
return _orderstatus;
public void set_orderstatus(String _orderstatus)
this._orderstatus = _orderstatus;
public String get_orderdate()
return _orderdate;
public void set_orderdate(String _orderdate)
this._orderdate = _orderdate;
public String get_ordership_to()
return _ordership_to;
public void set_ordership_to(String _ordership_to)
this._ordership_to = _ordership_to;
public String get_ordertotal()
return _ordertotal;
public void set_ordertotal(String _ordertotal)
this._ordertotal = _ordertotal;
public String get_ordercurrency_symbol()
return _ordercurrency_symbol;
public void set_ordercurrency_symbol(String _ordercurrency_symbol)
this._ordercurrency_symbol = _ordercurrency_symbol;
活动
public class OrderListFragment extends Fragment
View rootView;
ListView lv;
List<OrderList> list ;
MyListAdapter adt;
DatabaseHandler db ;
ProgressDialog progress;
SharedPreferences pref;
public OrderListFragment()
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
rootView = inflater.inflate(R.layout.fragmentorderlist, container,
false);
if (android.os.Build.VERSION.SDK_INT > 9)
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
lv = (ListView) rootView.findViewById(R.id.orderlistview);
db = new DatabaseHandler(getActivity());
list = db.getAllOrderList();
if(list.size() == 0)
progress = new ProgressDialog(getActivity());
progress.setMessage("Fetching Data.....");
progress.setIndeterminate(true);
progress.setCancelable(false);
progress.show();
pref = PreferenceManager.getDefaultSharedPreferences(getActivity());
String customer_id = pref.getString("customer_id", null);
Log.v("log_tag", "customer_id"+customer_id);
if(customer_id != null)
Log.v("log_tag", "customer_id 2332 ::: "+customer_id);
new FetchOrderListData().execute(customer_id);
adt = new MyListAdapter(getActivity());
lv.setAdapter(adt);
lv.setOnItemClickListener(new OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> a, View v, int position,
long id)
Bundle bundle = new Bundle();
bundle.putString("orderlist_increment_id", list.get(position).get_orderincrement_id()+"");
Fragment fragment = new OrderdetailFragment();
fragment.setArguments(bundle);
FragmentManager fragmentManager = OrderListFragment.this
.getActivity().getSupportFragmentManager();
FragmentTransaction mFragmentTransaction = fragmentManager
.beginTransaction();
mFragmentTransaction.addToBackStack(null);
mFragmentTransaction.replace(R.id.Frame_Layout, fragment)
.commit();
);
return rootView;
public class MyListAdapter extends BaseAdapter
private LayoutInflater mInflater;
public MyListAdapter(Context context)
mInflater = LayoutInflater.from(context);
public int getCount()
return list.size();
public Object getItem(int position)
return position;
public long getItemId(int position)
return position;
public View getView(final int position, View convertView,
ViewGroup parent)
convertView = mInflater.inflate(R.layout.custom_orderlistdata,
null);
TextView ordernumbertxt = (TextView) convertView
.findViewById(R.id.ordernumberTxt);
TextView orderdate = (TextView) convertView
.findViewById(R.id.orderdateTxt);
TextView orderamount = (TextView) convertView
.findViewById(R.id.orderAmountTxt);
TextView orderSatusTxt = (TextView) convertView
.findViewById(R.id.orderSatusTxt);
ordernumbertxt.setText(html.fromHtml("<b>Order Number : </b>"+list.get(position).get_orderincrement_id()+""));
orderdate.setText(list.get(position).get_orderdate());
orderSatusTxt.setText(list.get(position).get_orderstatus());
String parts = list.get(position).get_ordertotal();
double d = Double.parseDouble(parts);
double dval = roundTwoDecimals(d);
orderamount.setText(Html.fromHtml("<b>Total : </b>"+list.get(position).get_ordercurrency_symbol()+" "+dval));
return convertView;
public double roundTwoDecimals(double d)
DecimalFormat twoDForm = new DecimalFormat("#.##");
return Double.valueOf(twoDForm.format(d));
private class FetchOrderListData extends AsyncTask<String, Void, JSONObject>
@Override
protected void onPreExecute()
@Override
protected JSONObject doInBackground(String... args)
JSONObject listSize = null;
Integer cust_id = Integer.parseInt(args[0]);
try
listSize = DBAda.getAllOrderListData(cust_id);
////*** call your HTTP Service over here ***////
catch (JSONException e)
// TODO Auto-generated catch block
e.printStackTrace();
return listSize;
protected void onPostExecute(JSONObject jsonObj)
db = new DatabaseHandler(getActivity());
if (progress != null)
progress.hide();
if (jsonObj == null)
return;
JSONArray json;
try
json = jsonObj.getJSONArray("records");
for (int i = 0; i < json.length(); i++)
JSONObject jobj;
try
jobj = json.getJSONObject(i);
int order_id = Integer.parseInt(jobj.getString("order_id").toString());
int order_IncrementId = Integer.parseInt(jobj.getString("increment_id").toString());
String orderStatus = jobj.getString("status");
String orderdate = jobj.getString("date");
String ordershipto = jobj.getString("ship_to");
String ordertotal = jobj.getString("order_total");
String ordersymbol = jobj.getString("currency_symbol");
//db.addWishlistItem(new WishList(entity_id,quentity,comment,name,short_description,thumbnails,itemId));
db.addOrderListItem(new OrderList(order_id, order_IncrementId, orderStatus, orderdate, ordershipto, ordertotal, ordersymbol));
catch (JSONException e)
// TODO Auto-generated catch block
e.printStackTrace();
catch (JSONException e1)
// TODO Auto-generated catch block
e1.printStackTrace();
lv = (ListView) rootView.findViewById(R.id.orderlistview);
db = new DatabaseHandler(getActivity());
list = db.getAllOrderList();
adt = new MyListAdapter(getActivity());
lv.setAdapter(adt);
【讨论】：
以上是关于如何实现无限滚动列表视图的主要内容，如果未能解决你的问题，请参考以下文章