个人中心
文章发布
退出
作者热门文章
- html - 出于某种原因，IE8 对我的 Sass 文件中继承的 html5 CSS 不友好？
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景？
26
4
我在做什么::
问题::
DisplayBuffet_NotifyDataSetChanged_Fragment.java
public class DisplayBuffet_NotifyDataSetChanged_Fragment extends Fragment implements View.OnClickListener{
// Declaration
static ListView xmlFragmentListView;
static View layout;
static DisplayBuffetAsyncTask downloadTask=null;
Button btnRating,btnPrice,btnDistance;
private FileCache fileCache=null;
private MemoryCache memoryCache=null;
DisplayBuffetAdapter listViewAdapter;
static Bundle bundle=null;
DisplayBuffet_Json_Fragment fragment=null;
ArrayList<HashMap<String, String>> arrayListBuffet=null;
FindMyBuffetDatabaseHelper mHelper=null;;
SQLiteDatabase database=null;
public static DisplayBuffet_NotifyDataSetChanged_Fragment newInstance(FileCache _fileCache,MemoryCache _memoryCache) {
DisplayBuffet_NotifyDataSetChanged_Fragment fragment = new DisplayBuffet_NotifyDataSetChanged_Fragment();
bundle = new Bundle();
bundle.putSerializable(FindMyBuffetConstants.BUFFET_FILECACHE_KEY, _fileCache);
bundle.putSerializable(FindMyBuffetConstants.BUFFET_MEMORYCACHE_KEY, _memoryCache);
fragment.setArguments(bundle);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Retain this fragment across configuration changes.
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
layout = inflater.inflate(R.layout.display_buffets_fragment,container, false);
return layout;
}
private void initViews() {
fileCache = (FileCache) getArguments().getSerializable(FindMyBuffetConstants.BUFFET_FILECACHE_KEY);
memoryCache = (MemoryCache) getArguments().getSerializable(FindMyBuffetConstants.BUFFET_MEMORYCACHE_KEY);
xmlFragmentListView = ((ListView) layout.findViewById(R.id.sortrestaurantlistview));
btnRating=(Button) getActivity().findViewById(R.id.btnRating);
btnPrice=(Button) getActivity().findViewById(R.id.btnPrice);
btnDistance=(Button) getActivity().findViewById(R.id.btnDistance);
}
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
}
@Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
arrayListBuffet = new ArrayList<HashMap<String, String>>();
mHelper = new FindMyBuffetDatabaseHelper(FindMyBuffetApplication.currentActivityContext);
database = mHelper.getWritableDatabase();
initViews();
btnRating.setOnClickListener(this);
btnPrice.setOnClickListener(this);
btnDistance.setOnClickListener(this);
setListViewAdapter();
}
@Override
public void onClick(View v) {
String strOrder="asc";
if (FindMyBuffetApplication.isRatingOrderByDesc == false && FindMyBuffetApplication.sortBy.equalsIgnoreCase(FindMyBuffetConstants.TAB_NAME_RATING)){
btnRating.setBackgroundResource(R.drawable.tab_button_foucs_asc);
btnPrice.setBackgroundResource(R.drawable.tab_button_default);
btnDistance.setBackgroundResource(R.drawable.tab_button_default);
}
else if (FindMyBuffetApplication.isPriceOrderByDesc == false && FindMyBuffetApplication.sortBy.equalsIgnoreCase(FindMyBuffetConstants.TAB_NAME_PRICE)){
btnPrice.setBackgroundResource(R.drawable.tab_button_foucs_asc);
btnRating.setBackgroundResource(R.drawable.tab_button_default);
btnDistance.setBackgroundResource(R.drawable.tab_button_default);
}
else if (FindMyBuffetApplication.isDistanceOrderByDesc == false && FindMyBuffetApplication.sortBy.equalsIgnoreCase(FindMyBuffetConstants.TAB_NAME_DISTANCE)){
btnDistance.setBackgroundResource(R.drawable.tab_button_foucs_asc);
btnRating.setBackgroundResource(R.drawable.tab_button_default);
btnPrice.setBackgroundResource(R.drawable.tab_button_default);
}
else if (FindMyBuffetApplication.isRatingOrderByDesc == true && FindMyBuffetApplication.sortBy.equalsIgnoreCase(FindMyBuffetConstants.TAB_NAME_RATING)){
btnRating.setBackgroundResource(R.drawable.tab_button_foucs_dec);
btnDistance.setBackgroundResource(R.drawable.tab_button_default);
btnPrice.setBackgroundResource(R.drawable.tab_button_default);
}
else if (FindMyBuffetApplication.isPriceOrderByDesc == true && FindMyBuffetApplication.sortBy.equalsIgnoreCase(FindMyBuffetConstants.TAB_NAME_PRICE)){
btnPrice.setBackgroundResource(R.drawable.tab_button_foucs_dec);
btnDistance.setBackgroundResource(R.drawable.tab_button_default);
btnRating.setBackgroundResource(R.drawable.tab_button_default);
}
else if (FindMyBuffetApplication.isDistanceOrderByDesc == true && FindMyBuffetApplication.sortBy.equalsIgnoreCase(FindMyBuffetConstants.TAB_NAME_DISTANCE)){
btnDistance.setBackgroundResource(R.drawable.tab_button_foucs_dec);
btnPrice.setBackgroundResource(R.drawable.tab_button_default);
btnRating.setBackgroundResource(R.drawable.tab_button_default);
}
switch(v.getId()) {
case R.id.btnRating:
FindMyBuffetApplication.sortBy = FindMyBuffetConstants.TAB_NAME_RATING;
if (FindMyBuffetApplication.isRatingOrderByDesc == false)
FindMyBuffetApplication.isRatingOrderByDesc = true;
else
FindMyBuffetApplication.isRatingOrderByDesc = false;
//displayView();
if(FindMyBuffetApplication.isRatingOrderByDesc==true)strOrder="desc";
sortListView(FindMyBuffetConstants.SORT_BY_RATING_1,strOrder);
break;
case R.id.btnPrice:
FindMyBuffetApplication.sortBy = FindMyBuffetConstants.TAB_NAME_PRICE;
if (FindMyBuffetApplication.isPriceOrderByDesc == false)
FindMyBuffetApplication.isPriceOrderByDesc = true;
else
FindMyBuffetApplication.isPriceOrderByDesc = false;
//displayView();
if(FindMyBuffetApplication.isPriceOrderByDesc==true)strOrder="desc";
sortListView(FindMyBuffetConstants.SORT_BY_PRICE_1,strOrder);
break;
case R.id.btnDistance:
FindMyBuffetApplication.sortBy = FindMyBuffetConstants.TAB_NAME_DISTANCE;
if (FindMyBuffetApplication.isDistanceOrderByDesc == false)
FindMyBuffetApplication.isDistanceOrderByDesc = true;
else
FindMyBuffetApplication.isDistanceOrderByDesc = false;
//displayView();
if(FindMyBuffetApplication.isPriceOrderByDesc==true)strOrder="desc";
sortListView(FindMyBuffetConstants.SORT_BY_DISTANCE_1,strOrder);
break;
}
}
private void setListViewAdapter(){
downloadTask = new DisplayBuffetAsyncTask();
if (FindMyBuffetApplication.sortBy == FindMyBuffetConstants.TAB_NAME_RATING){
if (FindMyBuffetApplication.isDownloading) {
downloadTask.initilizeAsyncTask(
getFragmentManager(), xmlFragmentListView,downloadTask,
fileCache,memoryCache);
downloadTask.execute();
}
}
else if (FindMyBuffetApplication.sortBy == FindMyBuffetConstants.TAB_NAME_PRICE){
if (FindMyBuffetApplication.isDownloading) {
downloadTask.initilizeAsyncTask(
getFragmentManager(), xmlFragmentListView,
downloadTask,
fileCache,memoryCache);
downloadTask.execute();
}
}
else if (FindMyBuffetApplication.sortBy == FindMyBuffetConstants.TAB_NAME_DISTANCE){
if (FindMyBuffetApplication.isDownloading) {
downloadTask.initilizeAsyncTask(
getFragmentManager(), xmlFragmentListView,
downloadTask,
fileCache,memoryCache);
downloadTask.execute();
}
}
listViewAdapter = new DisplayBuffetAdapter(arrayListBuffet, fileCache,memoryCache);
xmlFragmentListView.setAdapter(listViewAdapter);
}
private void sortListView(String strSortBy,String strOrder) {
arrayListBuffet.clear();
if (FindMyBuffetApplication.sortBy == FindMyBuffetConstants.TAB_NAME_RATING) {
SortBuffets(FindMyBuffetConstants.SORT_BY_RATING_1, strOrder);
} else if (FindMyBuffetApplication.sortBy == FindMyBuffetConstants.TAB_NAME_PRICE) {
SortBuffets(FindMyBuffetConstants.SORT_BY_PRICE_1, strOrder);
} else if (FindMyBuffetApplication.sortBy == FindMyBuffetConstants.TAB_NAME_DISTANCE) {
SortBuffets(FindMyBuffetConstants.SORT_BY_DISTANCE_1, strOrder);
}
listViewAdapter.notifyDataSetChanged();
}
/*@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
}
@Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
}*/
private void displayView() {
Fragment objFragment = getFragmentManager().findFragmentById(getId());
if (objFragment != null) {
getFragmentManager().beginTransaction().remove(objFragment).commit();
//objFragment = new SortBuffetRating();
objFragment = DisplayBuffet_Json_Fragment.newInstance(fileCache,memoryCache);
getFragmentManager().beginTransaction().add(R.id.frame_container, objFragment).commit();
} else {
//objFragment = new SortBuffetRating();
objFragment = DisplayBuffet_Json_Fragment.newInstance(fileCache,memoryCache);
getFragmentManager().beginTransaction().add(R.id.frame_container, objFragment).commit();
}
}
/*
* Displays data from SQLite
*/
private void SortBuffets(String strSortBy,String strOrder){
Cursor mCursor = database.rawQuery("select * from " + BuffetTable.TABLE_NAME_BUFFET + " order by " + strSortBy +" "+strOrder, null);
try {
// looping through all rows and adding to list
if (mCursor.moveToFirst()) {
do {
HashMap<String, String> map=new HashMap<String, String>();
map.put(BuffetTable.COLUMN_ID,mCursor.getString(0));
map.put(BuffetTable.COLUMN_BUF_OFF_ID,mCursor.getString(1));
map.put(BuffetTable.COLUMN_FROM_TIME,mCursor.getString(2));
map.put(BuffetTable.COLUMN_TO_TIME,mCursor.getString(3));
map.put(BuffetTable.COLUMN_ONLINE_PRICE,mCursor.getString(4));
map.put(BuffetTable.COLUMN_RESERVED_PRICE,mCursor.getString(5));
map.put(BuffetTable.COLUMN_BUF_IMAGE_FILE_NAME,mCursor.getString(6));
map.put(BuffetTable.COLUMN_RES_NAME,mCursor.getString(7));
map.put(BuffetTable.COLUMN_RATING,mCursor.getString(8));
map.put(BuffetTable.COLUMN_LATITUDE,mCursor.getString(9));
map.put(BuffetTable.COLUMN_LONGITUDE,mCursor.getString(10));
map.put(BuffetTable.COLUMN_BUF_TYPE_NAME,mCursor.getString(11));
arrayListBuffet.add(map);
} while (mCursor.moveToNext());
}
}catch (SQLiteException e){
Log.i(FindMyBuffetApplication.applicationName+"."+FindMyBuffetConstants.PACKAGE_NAME+"."+FindMyBuffetConstants.PACKAGE_NAME,"Error Druing Sorting Buffets "+ e.getMessage());
e.printStackTrace();
Toast.makeText(FindMyBuffetApplication.currentActivityContext, "Error Druing Sorting The Buffets By" +strSortBy,Toast.LENGTH_LONG).show();
}catch (Exception e) {
Log.i(FindMyBuffetApplication.applicationName+"."+FindMyBuffetConstants.PACKAGE_NAME+"."+FindMyBuffetConstants.PACKAGE_NAME,"Error Druing Sorting Buffets "+ e.getMessage());
e.printStackTrace();
Toast.makeText(FindMyBuffetApplication.currentActivityContext, "Error Druing Sorting The Buffets By" +strSortBy,Toast.LENGTH_LONG).show();
}finally {
// Release the memory
mCursor.close();
}
}
@Override
public void onDestroy() {
super.onDestroy();
database.close();
//layout = null; // now cleaning up!
//bundle = null;
/*fragment = null;
if (downloadTask != null && downloadTask.getStatus() != AsyncTask.Status.FINISHED)
downloadTask=null;*/
}
}
DisplayBuffetAdapter.java
public class DisplayBuffetAdapter extends BaseAdapter {
// Declare Variables
ImageLoader imageLoader;
ArrayList<HashMap<String, String>> arrayListBuffet;
LayoutInflater inflater;
FileCache fileCache=null;
MemoryCache memoryCache=null;
int tmpLoopCnt=0;
public DisplayBuffetAdapter(ArrayList<HashMap<String, String>> _arraylist,FileCache _fileCache,MemoryCache _memoryCache) {
this.arrayListBuffet = _arraylist;
this.fileCache=_fileCache;
this.memoryCache=_memoryCache;
this.imageLoader=new ImageLoader(FindMyBuffetApplication.currentActivityContext,fileCache,memoryCache);
tmpLoopCnt=0;
}
public int getCount() {
return arrayListBuffet.size();
}
public Object getItem(int position) {
return arrayListBuffet.get(position);
}
public long getItemId(int position) {
return position;
}
private class ViewHolder {
// Declare Variables
ImageView imgRestBuffLogo;
TextView txtResName;
TextView txtRestBufType;
TextView txtRestTime;
TextView txtRestDistance;
TextView txtReservePrice;
TextView txtOnlinePrice;
RatingBar restRatingBar;
Button btnOnlinePrice;
Button btnReservedPrice;
}
public View getView(int position, View convertView, ViewGroup parent) {
tmpLoopCnt = tmpLoopCnt + 1;
Log.i("LIST VIEW ADAPATER COUNT", ""+tmpLoopCnt);
ViewHolder holder;
LayoutInflater inflater;
if (convertView == null) {
inflater = (LayoutInflater) FindMyBuffetApplication.currentActivityContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.display_buffet_listview, null);
holder = new ViewHolder();
Typeface txtResnameFontFace=Typeface.createFromAsset(FindMyBuffetApplication.currentActivityContext.getAssets(), "Roboto-Bold.ttf");
Typeface txtRestBufTypeFontFace=Typeface.createFromAsset(FindMyBuffetApplication.currentActivityContext.getAssets(), "Roboto-Medium.ttf");
Typeface txtRestTimeFontFace=Typeface.createFromAsset(FindMyBuffetApplication.currentActivityContext.getAssets(), "Roboto-Bold.ttf");
//Typeface txtReservePrice=Typeface.createFromAsset(FindMyBuffetApplicationCls.currentActivityContext.getAssets(),"Roboto-Bold.ttf");
//Typeface txtOnlinePrice=Typeface.createFromAsset(FindMyBuffetApplicationCls.currentActivityContext.getAssets(),"Roboto-Bold.ttf");
Typeface btnPrice=Typeface.createFromAsset(FindMyBuffetApplication.currentActivityContext.getAssets(), "Roboto-Bold.ttf");
Typeface txtRestDistanceFontFace=Typeface.createFromAsset(FindMyBuffetApplication.currentActivityContext.getAssets(),"Roboto-Light.ttf");
// Locate the TextViews in listview_item.xml
holder.txtResName = (TextView) convertView.findViewById(R.id.txtRestName);
holder.txtResName.setTypeface(txtResnameFontFace);
holder.txtRestBufType = (TextView) convertView.findViewById(R.id.txtRestBufType);
holder.txtRestBufType.setTypeface(txtRestBufTypeFontFace);
holder.txtRestTime = (TextView) convertView.findViewById(R.id.txtRestTime);
holder.txtRestTime.setTypeface(txtRestTimeFontFace);
holder.txtRestDistance = (TextView) convertView.findViewById(R.id.txtRestDistance);
holder.txtRestDistance.setTypeface(txtRestDistanceFontFace);
holder.restRatingBar=(RatingBar) convertView.findViewById(R.id.restRatingBar);
//holder.txtReservePrice = (TextView) convertView.findViewById(R.id.txtReservePrice);
//holder.txtReservePrice.setTypeface(txtReservePrice);
//holder.txtOnlinePrice = (TextView) convertView.findViewById(R.id.txtOnlinePrice);
//holder.txtOnlinePrice.setTypeface(txtOnlinePrice);
holder.btnOnlinePrice=(Button) convertView.findViewById(R.id.btnOnlinePrice);
holder.btnOnlinePrice.setTypeface(btnPrice);
holder.btnReservedPrice=(Button) convertView.findViewById(R.id.btnReservedPrice);
holder.btnOnlinePrice.setTypeface(btnPrice);
// Locate the ImageView in listview_item.xml
holder.imgRestBuffLogo = (ImageView) convertView.findViewById(R.id.imgRestBuffetLogo);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
HashMap<String, String> objMap= arrayListBuffet.get(position);
holder.txtResName.setText(objMap.get(BuffetTable.COLUMN_RES_NAME));
holder.txtRestBufType.setText(objMap.get(BuffetTable.COLUMN_BUF_TYPE_NAME));
holder.restRatingBar.setRating(Float.valueOf(objMap.get(BuffetTable.COLUMN_RATING)));
holder.txtRestTime.setText(formatTime(objMap.get(BuffetTable.COLUMN_FROM_TIME))+" to "+formatTime(objMap.get(BuffetTable.COLUMN_TO_TIME)));
//txtOnlinePrice.setText(objMap.get("Online_Price"));
//txtReservePrice.setText(objMap.get("Reserved_Price"));
holder.btnOnlinePrice.setText(" Buy Now\n "+"Rs."+objMap.get(BuffetTable.COLUMN_ONLINE_PRICE)+" ");
holder.btnReservedPrice.setText(" Reserve\n "+"Rs."+objMap.get(BuffetTable.COLUMN_RESERVED_PRICE)+" ");
//double dist=objMap.get("Latitude")-objMap.get("Longitude");
//txtRestDistance.setText(String.valueOf(dist));
holder.txtRestDistance.setText(""+10+position+" Km");
String strUrl=FindMyBuffetApplication.URL+FindMyBuffetConstants.WEB_SERVER_PATH_BUF_IMAGE+objMap.get(BuffetTable.COLUMN_BUF_IMAGE_FILE_NAME);
imageLoader.DisplayImage(strUrl,holder.imgRestBuffLogo);
return convertView;
}
private String formatTime(String strTime){
//example For hour,minutes and seconds
// String strTime = "15:30:18 pm";
//SimpleDateFormat sdf = new SimpleDateFormat("hh:mm:ss a");
strTime=strTime.substring(0,5)+" am";
SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");
Date date = null;
try {
date = sdf.parse(strTime);
} catch (java.text.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return sdf.format(date);
}
}
最佳答案
在 private void sortListView(
在调用 notifyDataSetChanged 之前，您应该将新数据集提交给您的适配器。否则，您只是将数据链接到 fragment 内。您可以同时创建一个新的 Adapter 并再次调用 setListAdapter，或者在 Adapter 中创建一个方法来更新数据集。例如:
public void updateData(ArrayList<HashMap<String, String>> _arraylist) {
this.arrayListBuffet = _arraylist;
}
并在之前调用它
listViewAdapter.notifyDataSetChanged();
关于java - ListView 未反射(reflect) notifyDataSetChanged() 的更改，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22144503/
26
4
0
我正在尝试在我的 recyclerview 方法上实现此方法 Changing background color of selected item in recyclerview 我正确地遵循了脚本，
我有一个列表，其中填充了自定义 ArrayAdapter。 我想每秒更新一个进度条，所以我尝试使用 notifyDataSetChanged() 来重新绘制列表，但它似乎不起作用。 最佳答案 您如何更
我正在改进我的应用程序稳定性和性能，但现在我遇到了来自 Android Studio 的警告。请考虑以下适配器类: private class CoinsAdapter(private val fra
我正在制作一个Android来做名为list track的列表应用程序，现在我仍在研究该应用程序的基础知识。无论如何，我为列表 View 创建了一个上下文菜单，该上下文菜单只有1个选项“删除”，它的意
我想从另一个线程调用adapter.notifyDataSetChanged()。我读到我应该使用 AsyncTask 并在执行后执行 adapter.notifyDataSetChanged() 。
我知道这个问题已被问过数千次，但由于某种原因我找不到适合我的情况的答案。 我拥有的是一个从 Web 服务获取数据并用信息填充列表的线程。然后我想按下一个按钮并调用同一线程来获取更多数据并将其添加到列表
friend ， 我正在为 android ListView 使用以下自定义适配器我面临的问题是调用 notifydatasetchanged() 后位置错误； 我第一次将数据与列表位置绑定(bind
我在 windows 7 64bit 下使用 android 1.6当我从扩展 BaseAdapter 的适配器对象调用 notifyDataSetChanged() 时，我得到了运行时异常 我尝试使
我有一个类 Myadapter extends BaseAdapter.in Myadapter 我更改了 MyListView 数据然后调用 notifyDataSetChanged() 方法，比如
我一直在寻找年龄并尝试了几个月。我永远无法让我的观点(任何观点)无效。这里有什么问题，任何人都可以告诉我吗？谁能告诉我如何使用这些无效方法。提前致谢! if(resul
在我的 Activity 中，我有两个 ListView ，因此我使用了两个不同的适配器。我的要求是在两个列表项中我都有一个按钮。单击任何 ListView 中的按钮，两个 ListView 中的数据
我有一个用于我的 ListView 的适配器，然后我需要使用 SensorChange 方法中的 notifydatasetchanged 方法刷新它。你知道 SensorChange 方法被频繁快速
我正在使用 FragmentStatePagerAdapter 来实现 VerticalPageAdapter 的目的，我必须为与 Button< 相关的相同 Fragment 创建动态编号 被按下，
这个问题在这里已经有了答案: Custom Adapter getView() method is not called (6 个答案) 关闭 7 年前。 这是我的代码我想在 ListView 中显
我正在尝试做的事情: 按下添加按钮时，将值从 EditText 插入到数据库。 用数据库中的数据填充 ListView 。 问题: 当我单击添加按钮时，它会将值插入到数据库中，但不会将其填充到 Lis
我正在尝试制作一个像 tinder 一样刷卡的应用程序。我有一个 Texview 上面有一些文字，当我刷下一张卡片时有另一个文字等等。我还想做的是当我单击一个按钮以删除屏幕上的卡片并转到下一张时。我正
我正在制作一个程序，该程序将寻找与手机蓝牙设备配对的程序，显示它们及其地址以供用户查看，并且当用户已经在他的手机中打开 Bt 时它工作正常。当他不这样做时会出现问题，导致添加到 arrayList 中
有人可以向我解释以下问题的来源: 我有一个列表，根据某些偏好显示多个项目。用户可以通过 SlidingDrawer 更改这些首选项。每当发生这种情况时，我都会获得与新首选项相对应的项目，然后使用以下代
我有一个 ListView ，它使用不同类中的基本适配器显示来 self 的数据库的多个数据。每次我删除或添加一个项目到我的数据库时，我都想刷新我的 ListView 。 这是我的代码，但它没有刷新我
在我的代码中，我有两个 Activity 。 一个是 ListView Activity ，另一个 Activity 用于修改数据。修改数据后，用户将返回到 ListView Activity 。 我
我是一名优秀的程序员,十分优秀！