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我想在應用程序代碼中使用無盡的列表視圖適配器，但一些如何我只是無法在列表視圖中看到任何值。使用普通的listview適配器時，我的代碼運行得非常好。我試圖使用CWAC-無盡的adpater。我可以得到如何使用我的asynctask來運行它，因爲它在播放後會給我留下空白的屏幕。 下面是我的代碼。無盡的適配器不顯示在列表視圖中的任何值
public class EndlessAdapterExample extends ListActivity {
public JSONArray jsonarray,jsondatearray;
public String url;
public String selectedvalue;
public String TAG = "TAG Event Display";
public String SuggestCity;
public String SuggestState;
public String suggestCountry;
public String event_id,address;
String lat;
String lng;
public String event_name;
public String dateKey;
public String datetime,timenew;
Calendar cal;
public SharedPreferences prefs;
public Editor editor;
public String access_token,id,username;
public static ArrayList<EventsBean> arrayEventsBeans = new ArrayList<EventsBean>();
ArrayList<DateBean> sortArray = new ArrayList<DateBean>();
public SAmpleAdapter adapter;
public ImageView img_menu,img_calender;
public ListView listview;
static int LIST_SIZE;
private int mLastOffset = 0;
static final int BATCH_SIZE = 10;
ArrayList<EventsBean> countriesSub = new ArrayList<EventsBean>();
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setTheme(android.R.style.Theme);
setContentView(R.layout.sample_endless);
listview = (ListView)findViewById(android.R.id.list);
try {
// Preferences values fetched from the preference of FBConnection class.
prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
access_token = prefs.getString("access_token", null);
id = prefs.getString("uid", null);
username = prefs.getString("username", null);
if(access_token == null && id == null && username == null)
{
Toast.makeText(getApplicationContext(), "FaceBook Login was not successful" +
"/nPlease Relogin.", Toast.LENGTH_SHORT).show();
}
else
{
Log.i(TAG, "VALUES::" + access_token+ " " + id + " " +username);
url = "mu Url"
}
} catch (NullPointerException e) {
Log.i(TAG, "User Not Logged IN " + e.getMessage());
// TODO Auto-generated catch block
e.printStackTrace();
}
init();
listview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,long arg3) {
// TODO Auto-generated method stub
// Fetching the position from the listview which has been selected.
}
});
}
private void init() {
new FetchEventValues().execute();
}
private void setLastOffset(int i) {
mLastOffset = i;
}
private int getLastOffset(){
return mLastOffset;
}
private void displayList(ArrayList<EventsBean> countriesSub) {
setListAdapter(new DemoAdapter());
}
// AsyncTask Class called in the OnCreate() when the activity is first started.
public class FetchEventValues extends AsyncTask<Void, ArrayList<EventsBean>, ArrayList<EventsBean>>
{
ProgressDialog progressdialog = new ProgressDialog(EndlessAdapterExample.this);
ArrayList<EventsBean> merge = new ArrayList<EventsBean>();
ArrayList<EventsBean> localList;
public EventsBean eventsbean;
@SuppressLint("SimpleDateFormat")
@SuppressWarnings("unchecked")
@Override
protected ArrayList<EventsBean> doInBackground(Void... params) {
// Creating JSON Parser instance
JsonParser jParser = new JsonParser();
// getting JSON string from URL
JSONObject jsonobj = jParser.getJSONFromUrl(url);
Log.i(TAG, "URL VALUES:" + url);
try{
// Code to get the auto complete values Autocomplete Values
JSONArray jsonAarray = jsonobj.getJSONArray(Constants.LOCATIONS);
eventsbean = new EventsBean();
Log.e(TAG, "Location Array Size:" + jsonAarray.length());
for(int j = 0 ; j < jsonAarray.length() ; j++)
{
if(!jsonAarray.getJSONObject(j).isNull(Constants.LOCATION_CITY) && !jsonAarray.getJSONObject(j).isNull(Constants.LOCATION_STATE) && !jsonAarray.getJSONObject(j).isNull(Constants.LOCATION_COUNTRY))
{
JSONObject job = jsonAarray.getJSONObject(j);
if(job.has(Constants.LOCATION_STATE))
{
SuggestCity = job.getString(Constants.LOCATION_CITY);
eventsbean.setLocation_city(job.getString(Constants.LOCATION_CITY));
SuggestState = job.getString(Constants.LOCATION_STATE);
eventsbean.setLocation_state(job.getString(Constants.LOCATION_STATE));
suggestCountry = job.getString(Constants.LOCATION_COUNTRY);
eventsbean.setLocation_country(job.getString(Constants.LOCATION_COUNTRY));
}
}
}
// JSON object to fetch the events in datewise format
JSONObject eventobject = jsonobj.getJSONObject("events");
// @SuppressWarnings("unchecked")
Iterator<Object> keys = eventobject.keys();
while (keys.hasNext()) {
String datestring = String.valueOf(keys.next());
if (datestring.trim().length() > 0) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
Date date = formatter.parse(datestring);
DateBean dateBean = new DateBean(date);
sortArray.add(dateBean);
}
// JSONArray jsonArray = eventobject.getJSONArray(datestring);
//System.out.println(" --"+jsonArray);
}
System.out.println("size:"+sortArray.size());
System.out.println("==========sorting array======");
Collections.sort(sortArray,new CompareDate());
//reverse order
//Collections.reverse(sortArray);
for(DateBean d : sortArray){
dateKey = new SimpleDateFormat("yyyy-MM-dd").format(d.getDate());
System.out.println(dateKey);
Date today = new Date();
Date alldates = d.getDate();
cal = Calendar.getInstance();
/// Calendar alldates1 = Calendar.getInstance();
JSONArray jsonArray = eventobject.getJSONArray(dateKey);
System.out.println(" --"+jsonArray);
for (int i = 0 ; i < jsonArray.length() ; i++)
{
if (alldates.compareTo(today) > 0)
// if (alldates1 > cal) alldates.getTime() >= today.getTime()
{
JSONObject jsonobjname = jsonArray.getJSONObject(i);
eventsbean = new EventsBean();
JSONObject jobjectpicture = jsonobjname.getJSONObject(Constants.PICTURE);
JSONObject jobjeventpicture = jobjectpicture.getJSONObject(Constants.DATA);
eventsbean.setUrl(jobjeventpicture.getString(Constants.URL));
if(jsonobjname.has(Constants.OWNER))
{
JSONObject owner_obj = jsonobjname.getJSONObject(Constants.OWNER);
eventsbean.setOwner_id(owner_obj.getString(Constants.OWNER_ID));
eventsbean.setOwner_name(owner_obj.getString(Constants.OWNER_NAME));
String owner_name = owner_obj.getString(Constants.OWNER_NAME);
Log.i(TAG, "Owner:" + owner_name);
}
if(!jsonobjname.isNull(Constants.COVER))
{
JSONObject objectcover = jsonobjname.getJSONObject(Constants.COVER);
eventsbean.setCover_id(objectcover.getString(Constants.COVER_ID));
eventsbean.setSource(objectcover.getString(Constants.SOURCE));
String cover_url = objectcover.getString(Constants.SOURCE);
Log.i(TAG, "Cover Url:" + cover_url);
eventsbean.setOffset_y(objectcover.getString(Constants.OFFSET_Y));
eventsbean.setOffset_x(objectcover.getString(Constants.OFFSET_X));
}
eventsbean.setName(jsonobjname.getString(Constants.NAME));
eventsbean.setEvent_id(jsonobjname.getString(Constants.EVENT_ID));
eventsbean.setStart_time(jsonobjname.getString(Constants.START_TIME));
eventsbean.setDescription(jsonobjname.getString(Constants.DESCRIPTION));
eventsbean.setLocation(jsonobjname.getString(Constants.LOCATION));
if(!jsonobjname.isNull(Constants.IS_SILHOUETTE))
{
eventsbean.setIs_silhouette(jsonobjname.getString(Constants.IS_SILHOUETTE));
}
eventsbean.setPrivacy(jsonobjname.getString(Constants.PRIVACY));
datetime = jsonobjname.getString(Constants.START_TIME);
if(!jsonobjname.isNull(Constants.VENUE))
{
JSONObject objectvenue = jsonobjname.getJSONObject(Constants.VENUE);
if(objectvenue.has(Constants.VENUE_NAME))
{
eventsbean.setVenue_name(objectvenue.getString(Constants.VENUE_NAME));
event_name = objectvenue.getString(Constants.VENUE_NAME);
Log.i(TAG, "Event Venue Name:" + event_name);
}
else
{
eventsbean.setLatitude(objectvenue.getString(Constants.LATITUDE));
eventsbean.setLongitude(objectvenue.getString(Constants.LONGITUDE));
eventsbean.setCity(objectvenue.getString(Constants.CITY));
eventsbean.setState(objectvenue.getString(Constants.STATE));
eventsbean.setCountry(objectvenue.getString(Constants.COUNTRY));
eventsbean.setVenue_id(objectvenue.getString(Constants.VENUE_ID));
eventsbean.setStreet(objectvenue.getString(Constants.STREET));
address = objectvenue.getString(Constants.STREET);
eventsbean.setZip(objectvenue.getString(Constants.ZIP));
}
}
arrayEventsBeans.add(eventsbean);
Log.i(TAG, "arry list values:" + arrayEventsBeans.size());
}
}
}
}catch(Exception e){
localList=null;
Log.e(TAG , "Exception Occured:" + e.getMessage());
}
return arrayEventsBeans;
}
class CompareDate implements Comparator<DateBean>{
@Override
public int compare(DateBean d1, DateBean d2) {
return d1.getDate().compareTo(d2.getDate());
}
}
@Override
protected void onPostExecute(ArrayList<EventsBean> result) {
super.onPostExecute(result);
if(this.progressdialog.isShowing())
{
this.progressdialog.dismiss();
}
// adapter = new SAmpleAdapter(EndlessAdapterExample.this,0, arrayEventsBeans);
//listview.setAdapter(adapter);
//displayList(arrayEventsBeans);
LIST_SIZE = arrayEventsBeans.size();
for (int i = 0; i <= BATCH_SIZE; i++) {
countriesSub.add(arrayEventsBeans.get(i));
}
setLastOffset(BATCH_SIZE);
displayList(countriesSub);
Log.i(TAG, "country list:" + countriesSub.size());
}
@Override
protected void onPreExecute() {
super.onPreExecute();
this.progressdialog.setMessage("Loading....");
this.progressdialog.setCanceledOnTouchOutside(false);
this.progressdialog.show();
}
}
public class SAmpleAdapter extends ArrayAdapter<EventsBean> {
Context context;
public ArrayList<EventsBean> mOriginalvalues;
private ArrayList<EventsBean> mDisplayvalues;
ImageLoader imageloader;
public String datenew,datetime,date_text_value,timenew;
public int date_text,year;
public String time,month,description;
public LayoutInflater inflator = null;
public SAmpleAdapter(Context context, int resource, ArrayList<EventsBean> mEventarraylist) {
super(context, resource , mEventarraylist);
// TODO Auto-generated constructor stub
this.mOriginalvalues = mEventarraylist;
this.mDisplayvalues = mEventarraylist;
inflator = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageloader=new ImageLoader(context.getApplicationContext());
getFilter();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mOriginalvalues.size();
}
@Override
public EventsBean getItem(int position) {
// TODO Auto-generated method stub
return mOriginalvalues.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Holder viewHolder;
if(convertView == null)
{
viewHolder=new Holder();
convertView = inflator.inflate(R.layout.activity_list_items, parent, false);
viewHolder.txt_name = (TextView)convertView.findViewById(R.id.textname);
viewHolder.txt_owner_name = (TextView)convertView.findViewById(R.id.ownername);
viewHolder.txt_time = (TextView)convertView.findViewById(R.id.date);
viewHolder.txt_date = (TextView)convertView.findViewById(R.id.txt_date_value);
viewHolder.txt_month = (TextView)convertView.findViewById(R.id.txt_month_value);
viewHolder.txt_year = (TextView)convertView.findViewById(R.id.txt_year_value);
viewHolder.userimg = (ImageView)convertView.findViewById(R.id.imageView1);
convertView.setTag(viewHolder);
}
else
{
viewHolder=(Holder)convertView.getTag();
}
viewHolder.txt_name.setText(mOriginalvalues.get(position).getName());
viewHolder.txt_owner_name.setText(mOriginalvalues.get(position).getOwner_name());
String url = mOriginalvalues.get(position).getSource();
date_text_value = mOriginalvalues.get(position).getStart_time();
try {
parseDateFromString(date_text_value);
} catch (Exception e) {
Log.i("Adapter TAG", "Date Exception" + e.getMessage());
}
viewHolder.txt_date.setText(String.valueOf(date_text));
viewHolder.txt_month.setText(month);
viewHolder.txt_year.setText(String.valueOf(year));
Log.i("TEST", "Date:" + date_text_value);
imageloader.DisplayImage(url, viewHolder.userimg);
viewHolder.txt_time.setText(timenew);
return convertView;
}
public void resetData() {
mOriginalvalues = mDisplayvalues;
}
@SuppressLint("SimpleDateFormat")
public Date parseDateFromString(String aDateString){
SimpleDateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
Calendar c = Calendar.getInstance();
Date date= new Date();
try {
date= inputFormat.parse(aDateString);
System.out.println(date);
SimpleDateFormat day = new SimpleDateFormat("dd-MMM-yyyy");
SimpleDateFormat time = new SimpleDateFormat("hh:mm a", Locale.getDefault());
SimpleDateFormat month_date = new SimpleDateFormat("MMM");
c.setTime(inputFormat.parse(aDateString));
System.out.println(day.format(date));
datenew = day.format(date).toString();
date_text = c.get(Calendar.DAY_OF_MONTH);
month = month_date.format(c.getTime());
year = c.get(Calendar.YEAR);
System.out.println("Year = " + c.get(Calendar.YEAR));
System.out.println("Month = " + month);
System.out.println("Day = " + date_text);
System.out.println(time.format(date));
timenew = time.format(date).toString();
} catch (ParseException e) {
Log.i("TAG", "DateFormat Pasring Error:" + e.getMessage());
}
return date;
}
private class Holder{
TextView txt_name;
TextView txt_owner_name ;
TextView txt_time;
TextView txt_date;
TextView txt_month;
TextView txt_year;
ImageView userimg;
}
}
class DemoAdapter extends EndlessAdapter {
private RotateAnimation rotate=null;
ArrayList<EventsBean> tempList = new ArrayList<EventsBean>();
LayoutInflater inflator = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
DemoAdapter() {
super(new SAmpleAdapter(EndlessAdapterExample.this,R.layout.sample_endless,countriesSub));
inflator = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
rotate=new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF,
0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
rotate.setDuration(600);
rotate.setRepeatMode(Animation.RESTART);
rotate.setRepeatCount(Animation.INFINITE);
}
@Override
protected View getPendingView(ViewGroup parent) {
View row=getLayoutInflater().inflate(R.layout.row, null);
View child=row.findViewById(R.id.textview1);
child.setVisibility(View.GONE);
child=row.findViewById(R.id.throbber);
child.setVisibility(View.VISIBLE);
child.startAnimation(rotate);
return(row);
}
@Override
protected boolean cacheInBackground() {
tempList.clear();
int lastOffset = getLastOffset();
if(lastOffset < LIST_SIZE){
int limit = lastOffset + BATCH_SIZE;
for(int i=(lastOffset+1); (i<=limit && i<LIST_SIZE); i++){
tempList.add(arrayEventsBeans.get(i));
}
setLastOffset(limit);
if(limit<LIST_SIZE){
return true;
} else {
return false;
}
} else {
return false;
}
}
@SuppressLint("NewApi")
@Override
protected void appendCachedData() {
@SuppressWarnings("unchecked")
ArrayAdapter<EventsBean> arrAdapterNew = (ArrayAdapter<EventsBean>)getWrappedAdapter();
int listLen = tempList.size();
for(int i=0; i<listLen; i++){
arrAdapterNew.addAll(tempList.get(i));
}
}
}
}
我已更新我的代碼。我想我現在的問題是使用自定義適配器，因爲它在到達listview結尾後給了我多個值。最初，我得到10個值，但更新後，再次得到相同的10個值，但數達到121
你是否檢查你的'arrayEventsBeans'是否填充了你的響應值 – SathishKumar
是的它是因爲我得到我的迴應只是當我添加無盡的適配器我看到列表視圖 –
我想我的錯誤是有些在這裏DemoAdapter（）{超級（新SAmpleAdapter（EndlessAdapterExample.this，R.layout.sample_endless，countriesSub））;在這一行 –