Develop Reference

Adapter not displaying correct data

I am developing an application in which i am getting a large json data from the server. i want to display it in the list view. But i am getting the same value repeated. The no of items shown by the list view is proper. only same data repeated in all the list items.
Here is my code.
public class HistoryActivity extends AppCompatActivity {
private Toolbar toolbar;
String strServerResponse = null;
ProgressDialog nDialog;
ArrayList<String>clicklat;
ArrayList<String>clicklong;
ArrayList<String>dttime;
ArrayList<Pojo> history;
HistoryAdapter myAdapter;
ListView list;
public String date, inTime, outTime, inLat, inLong;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_history);
toolbar = (Toolbar) findViewById(R.id.app_bar);
toolbar.setTitle("History");
clicklat=new ArrayList<String>();
clicklong=new ArrayList<String>();
dttime=new ArrayList<String>();
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
list = (ListView) findViewById(R.id.historyList);
history = new ArrayList<Pojo>();
new NetCheck().execute();
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
ArrayList<String>clicklat= new ArrayList<String>(history.get(position).getLati());
ArrayList<String>clicklong= new ArrayList<String>(history.get(position).getLongi());
ArrayList<String>dttime= new ArrayList<String>(history.get(position).getDatetime());
Intent i = new Intent(HistoryActivity.this, DetailsActivity.class);
i.putStringArrayListExtra("clicklat", clicklat);
i.putStringArrayListExtra("clicklong", clicklong);
i.putStringArrayListExtra("clickdatetime", dttime);
startActivity(i);
}
});
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private class NetCheck extends AsyncTask<Void, Void, Void> {
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
nDialog.dismiss();
// TODO Auto-generated method stub
myAdapter = new HistoryAdapter(HistoryActivity.this, history);
list.setAdapter(myAdapter);
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpRequest = new HttpPost(
"http://myurl");
httpRequest.setHeader("Content-Type", "application/json");
SharedPreferences mmm = getSharedPreferences(
"MyPref", MODE_PRIVATE);
String logempid = mmm.getString("id", null);
JSONObject json = new JSONObject();
json.put("empid", logempid);
Log.e("JSON Object", json.toString());
StringEntity se = new StringEntity(json.toString());
se.setContentEncoding("UTF-8");
se.setContentType("application/json");
httpRequest.setEntity(se);
HttpResponse httpRes = httpClient.execute(httpRequest);
java.io.InputStream inputStream = httpRes.getEntity()
.getContent();
InputStreamReader inputStreamReader = new InputStreamReader(
inputStream);
BufferedReader reader = new BufferedReader(inputStreamReader);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
inputStream.close();
strServerResponse = sb.toString();
Log.e("Server Response", "" + strServerResponse.toString());
if (strServerResponse != null) {
try {
JSONArray arr = new JSONArray(strServerResponse);
for (int k = 0; k < arr.length(); k++) {
JSONObject jsonObj1 = arr.getJSONObject(k);
Pojo pojo = new Pojo();
JSONArray subArrayLat = jsonObj1.getJSONArray("lati_long");
List<String> lati= new ArrayList<String>();
List<String> longi= new ArrayList<String>();
List<String> dateandtime= new ArrayList<String>();
for (int i = 0; i < subArrayLat.length(); i++) {
String lat = subArrayLat.getJSONObject(i).getString("Latitude").toString();
String loong = subArrayLat.getJSONObject(i).getString("Longitude").toString();
String datetimee = subArrayLat.getJSONObject(i).getString("date_time").toString();
lati.add(lat);
longi.add(loong);
dateandtime.add(datetimee);
}
pojo.setLati(lati);//adding latitude list
pojo.setLongi(longi); //adding longitude list
pojo.setDatetime(dateandtime);
String dateee = arr.getJSONObject(k).getString("login_date");
String timeeee = arr.getJSONObject(k).getString("login_time");
String timeeee2 = arr.getJSONObject(k).getString("logout_time");
pojo.setDate(dateee);
pojo.setLoginTime(timeeee);
pojo.setLogoutTime(timeeee2);
history.add(pojo);
}
} catch (JSONException e) {
e.printStackTrace();
}
And this is Adapter
public class HistoryAdapter extends BaseAdapter {
private Context activity;
TextView tv_date;
TextView tv_loginTime;
TextView tv_logoutTime;
ArrayList<Pojo> list;
private ArrayList<Pojo> arraylist = null;
public static LayoutInflater inflater;
private Context context;
public HistoryAdapter(Context a, ArrayList<Pojo> history) {
// TODO Auto-generated constructor stub
activity = a;
list = history;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.arraylist = new ArrayList<Pojo>();
this.arraylist.addAll(list);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return list.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
View v = convertView;
if(convertView == null) {
v = inflater.inflate(R.layout.history_item, parent, false);
}
final Pojo pojo = list.get(position);
tv_date = (TextView) v.findViewById(R.id.historyDate);
tv_loginTime = (TextView) v.findViewById(R.id.historyLoginTime);
tv_logoutTime = (TextView) v.findViewById(R.id.historyLogoutTime);
tv_date.setText(pojo.getDate());
tv_loginTime.setText(pojo.getLoginTime());
tv_logoutTime.setText(pojo.getLogoutTime());
return v;
}
}
and setters and getters
public class Pojo {
public static String empid11;
public static String loginTime;
public static String date;
public static String logoutTime;
public static List<String> lat;
public static List<String> datetime;
public static List<String> longi;
public static List<String> inlogin;
public static List<String> inDate;
public List<String> getInTime(){
return this.inlogin;
}
public List<String> getInDate(){
return this.inDate;
}
public void setInDate(List<String> inDate){
this.inDate = inDate;
}
public List<String> getLati(){
return this.lat;
}
public List<String> getLongi(){
return this.longi;
}
public void setLati(List<String> lat){
this.lat = lat;
}
public void setLongi(List<String> longi){
this.longi = longi;
}
public void setId(String empid) {
this.empid11 = empid;
}
public String getId() {
return empid11;
}
public void setLoginTime(String loginTime) {
this.loginTime = loginTime;
}
public String getLoginTime() {
return loginTime;
}
public void setLogoutTime(String logoutTime) {
this.logoutTime = logoutTime;
}
public String getLogoutTime() {
return logoutTime;
}
public void setDate(String date) {
this.date = date;
}
public String getDate() {
return date;
}
public List<String> getDatetime(){
return this.datetime;
}
public void setDatetime(List<String> datetime){
this.datetime = datetime;
}
}

Hello see the modifiy version of your adapter. Let me know if you have any problem with it.
public class HistoryAdapter extends BaseAdapter
{
private Context activity;
TextView tv_date;
TextView tv_loginTime;
TextView tv_logoutTime;
private ArrayList<Pojo> arraylist = null;
public static LayoutInflater inflater;
private Context context;
public HistoryAdapter(Context a) {
activity = a;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.arraylist = new ArrayList<Pojo>();
}
#Override
public int getCount() {
return list.size();
}
#Override
public Object getItem(int position) {
return list.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public void addHistoryData(ArrayList<Pojo> newDataset){
if(arraylist != null){
arraylist.addAll(newDataset);
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder mViewHolder = null;
if(convertView == null)
{
mViewHolder = new ViewHolder();
convertView = inflater.inflate(R.layout.history_item, parent, false);
mViewHolder.tv_date = (TextView) convertView.findViewById(R.id.historyDate);
mViewHolder.tv_loginTime = (TextView)convertView.findViewById(R.id.historyLoginTime);
mViewHolder.tv_logoutTime = (TextView)convertView.findViewById(R.id.historyLogoutTime);
convertView.setTag(mViewHolder);
}else{
mViewHolder = (ViewHolder) convertView.getTag();
}
final Pojo pojo = list.get(position);
mViewHolder.tv_date.setText(pojo.getDate());
mViewHolder.tv_loginTime.setText(pojo.getLoginTime());
mViewHolder.tv_logoutTime.setText(pojo.getLogoutTime());
return v;
}
public class ViewHolder{
TextView tv_date
TextView tv_loginTime;
TextView tv_logoutTime;
}
}
In next the activity NetCheck class when web service response come change like below :
history.add(pojo);
myAdapter.addHistoryData(history);
myAdapter.notifiyDatasetChanged();

There may be problem you are getting repeated value in array, please check your array first.

onitemclick does not work in fragment (custom list view)

I have created an activity to get and show data to a custom list view.
Now I have changed this to fragment but onItemclick does not work.
SiteNews.java
public class SiteNews extends Fragment implements OnTabChangeListener,
OnPageChangeListener {
private TabHost tabHost;
private ViewPager viewPager;
private FragmentPagerNewsAdapter fragmentPagerNewsAdapter;
int i = 0;
View v;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v = inflater.inflate(R.layout.tabs_news_layout, container, false);
// put tabhost here:
// ***************************** part 1
// ***************************************************
i++;
// init tabhost
this.initializeTabHost(savedInstanceState);
// init ViewPager
this.initializeViewPager();
// ***************************** part 1
// ***************************************************
return v;
}
private void initializeViewPager() {
List<Fragment> fragmentsnews = new Vector<Fragment>();
fragmentsnews.add(new FragmentAllNews());
fragmentsnews.add(new FragmentUnreadNews());
this.fragmentPagerNewsAdapter = new FragmentPagerNewsAdapter(
getChildFragmentManager(), fragmentsnews);
this.viewPager = (ViewPager) v.findViewById(R.id.viewPagernews);
this.viewPager.setAdapter(this.fragmentPagerNewsAdapter);
this.viewPager.setOnPageChangeListener(this);
}
// fake content for tabhost
class FakeContent implements TabContentFactory {
private final Context mContext;
public FakeContent(Context context) {
mContext = context;
}
#Override
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumHeight(0);
v.setMinimumWidth(0);
return v;
}
}
private void initializeTabHost(Bundle args) {
tabHost = (TabHost) v.findViewById(android.R.id.tabhost);
tabHost.setup();
for (int i = 1; i <= 2; i++) {
TabHost.TabSpec tabSpec;
tabSpec = tabHost.newTabSpec("Tab " + i);
tabSpec.setIndicator("Tab " + i);
tabSpec.setContent(new FakeContent(getActivity()));
tabHost.addTab(tabSpec);
}
tabHost.setOnTabChangedListener(this);
}
#Override
public void onTabChanged(String tabId) {
int pos = this.tabHost.getCurrentTab();
this.viewPager.setCurrentItem(pos);
HorizontalScrollView hScrollView = (HorizontalScrollView) v
.findViewById(R.id.hScrollViewnews);
View tabView = tabHost.getCurrentTabView();
int scrollPos = tabView.getLeft()
- (hScrollView.getWidth() - tabView.getWidth()) / 2;
hScrollView.smoothScrollTo(scrollPos, 0);
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageSelected(int position) {
this.tabHost.setCurrentTab(position);
}
}
FragmentAllnews.java
public class FragmentAllNews extends Fragment implements View.OnClickListener {
ViewGroup v;
ListView list;
CustomAdapterAllNews adapter;
JSONObject json_data;
JSONArray jArray;
NewsGetData newsGetData;
ArrayList<String> id, title_news, text_news, cat_id, status;
String data, url, msg, check, readnumber, ACTION_SCAN, contents;
ArrayList<News> newsha;
News n;
int sizearray;
Resources res;
ArrayList<News> items;
News ne;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v = (ViewGroup) inflater.inflate(R.layout.tabfragmentallnews,
container, false);
list = (ListView) v.findViewById(R.id.listallnews);
res = getResources();
createarray();
/* items = new ArrayList<News>();
for (int k = 0; k < 25; k++) {
ne = new News();
ne.setTitle_news("title_news " + String.valueOf(k));
ne.setText_news("text_news " + String.valueOf(k));
ne.setCat_id(k);
ne.setStatus(k);
items.add(ne);
}*/
ReadData task1 = new ReadData();
task1.execute(new String[] { "url address" });
return v;
}
private void createarray() {
id = new ArrayList<String>();
title_news = new ArrayList<String>();
text_news = new ArrayList<String>();
cat_id = new ArrayList<String>();
status = new ArrayList<String>();
id.clear();
title_news.clear();
text_news.clear();
cat_id.clear();
status.clear();
}
private class ReadData extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog = new ProgressDialog(getActivity());
#Override
protected void onPreExecute() {
dialog.setMessage("Reading Data...");
dialog.show();
}
String text = "";
ArrayList<String> list1;
#Override
protected Boolean doInBackground(String... urls) {
url = "php url address";
InputStream is1;
for (String url1 : urls) {
// Read from web to InputStream
try {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(url);
// HttpPost post = new HttpPost(url1);
HttpResponse response = client.execute(post);
is1 = response.getEntity().getContent();
} catch (ClientProtocolException e) {
Toast.makeText(getActivity(), e.toString(),
Toast.LENGTH_LONG).show();
return false;
} catch (IOException e) {
Toast.makeText(getActivity(), e.toString(),
Toast.LENGTH_LONG).show();
return false;
}
// end of Read from web to InputStream
// Convert from InputStream to String Text
BufferedReader reader;
try {
reader = new BufferedReader(new InputStreamReader(is1,
"iso-8859-1"), 8);
String line = null;
while ((line = reader.readLine()) != null) {
text += line + "\n";
}
is1.close();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// end of Convert from InputStream to String Text
// Convert from Text to JSON and add to ArrayList list1
list1 = new ArrayList<String>();
try {
JSONArray jArray = new JSONArray(text);
for (int i = 0; i < jArray.length(); i++) {
JSONObject jsonData = jArray.getJSONObject(i);
list1.add(jsonData.getString("title_news") + " - "
+ jsonData.getString("text_news"));
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// end of Convert from Text to JSON and add to ArrayList list1
}
return true;
}
#Override
protected void onPostExecute(Boolean result) {
if (result == true) {
// add list1 to ArrayAdapter
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(
getActivity(), android.R.layout.simple_list_item_1,
list1);
// set adapter into listStudent
// list.setAdapter(adapter1);
Toast.makeText(getActivity(), text, Toast.LENGTH_LONG).show();
data = text;
newsha = parseJSON3(data);
adddata(newsha);
} else {
Toast.makeText(getActivity(), "Error", Toast.LENGTH_LONG)
.show();
}
dialog.dismiss();
}
}
/*
* #Override public void onItemClick(AdapterView<?> parent, View
* clickedView, int pos, long id) { TextView tv1 = (TextView)clickedView;
* int commaIndex = tv1.getText().toString().indexOf(","); String st_id =
* tv1.getText().toString().substring(0, commaIndex);
*
* Intent in = new Intent(this, EditDataActivity.class);
* in.putExtra("st_id", st_id); startActivity(in);
*
* }
*/
public void onItemClick(int mPosition) {
try {
News tempValues = (News) newsha.get(mPosition);
Toast.makeText(getActivity(), tempValues.getText_news(),
Toast.LENGTH_LONG).show();
} catch (Exception e) {
// Toast.makeText(CustomListView,"no", Toast.LENGTH_LONG).show();
}
}
public ArrayList<News> parseJSON3(String result) {
ArrayList<News> userha = new ArrayList<News>();
try {
jArray = new JSONArray(result);
for (int i = 0; i < jArray.length(); i++) {
json_data = jArray.getJSONObject(i);
n = new News();
n.setId(json_data.getInt("id"));
id.add(String.valueOf(json_data.getInt("id")));
n.setTitle_news(json_data.getString("title_news"));
title_news.add(json_data.getString("title_news"));
n.setText_news(json_data.getString("text_news"));
text_news.add(json_data.getString("text_news"));
n.setCat_id(json_data.getInt("cat_id"));
cat_id.add(String.valueOf(json_data.getInt("cat_id")));
n.setStatus(json_data.getInt("status"));
status.add(String.valueOf(json_data.getInt("status")));
userha.add(n);
}
sizearray = text_news.size();
if (sizearray <= 0) {
Toast.makeText(getActivity(), "get data error",
Toast.LENGTH_LONG).show();
} else {
}
} catch (JSONException e) {
// toast(9);
}
return userha;
}
private void adddata(ArrayList<News> newsha2) {
adapter = new CustomAdapterAllNews(getActivity(), newsha2, newsha2, res);
list.setAdapter(adapter);
}
#Override
public void onClick(View v) {
}
}
CustomAdapterAllNews.java
public class CustomAdapterAllNews extends BaseAdapter implements OnClickListener {
/*********** Declare Used Variables *********/
private Activity activitynews;
private ArrayList datanews;
private static LayoutInflater inflaternews=null;
public Resources resnews;
News tempValuesnews=null;
int i=0;
TableLayout tableLayout1news;
private List<News> worldpopulationlistnews = null;
private ArrayList<News> arraylistnews;
/************* CustomAdapter Constructor *****************/
public CustomAdapterAllNews(Activity a, ArrayList d, List<News> worldpopulationlist, Resources resLocal) {
/********** Take passed values **********/
activitynews = a;
datanews=d;
resnews = resLocal;
this.arraylistnews = new ArrayList<News>();
this.worldpopulationlistnews = worldpopulationlist;
this.arraylistnews.addAll(worldpopulationlist);
/*********** Layout inflator to call external xml layout () **********************/
inflaternews = (LayoutInflater)activitynews.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
/******** What is the size of Passed Arraylist Size ************/
public int getCount() {
if(datanews.size()<=0)
return 1;
return datanews.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
/********* Create a holder to contain inflated xml file elements ***********/
public static class ViewHolder{
public TextView text;
public TextView text1;
public ImageView image;
}
/*********** Depends upon data size called for each row , Create each ListView row ***********/
#SuppressLint("InflateParams")
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
ViewHolder holder;
if(convertView==null){
/********** Inflate tabitem.xml file for each row ( Defined below ) ************/
vi = inflaternews.inflate(R.layout.list_news, null);
/******** View Holder Object to contain tabitem.xml file elements ************/
holder=new ViewHolder();
holder.text=(TextView)vi.findViewById(R.id.textlistnews);
holder.text1=(TextView)vi.findViewById(R.id.text1listnews);
holder.image=(ImageView)vi.findViewById(R.id.imagelistnews);
/************ Set holder with LayoutInflater ************/
vi.setTag(holder);
}
else
holder=(ViewHolder)vi.getTag();
if(datanews.size()<=0)
{
holder.text.setText("No Data");
holder.text1.setText("نتیجه یافت نشد");
holder.image.setImageResource(resnews.getIdentifier("com.iranvizhe:drawable/"+"image00",null,null));
}
else
{
/***** Get each Model object from Arraylist ********/
tempValuesnews=null;
tempValuesnews = (News) datanews.get(position);
/************ Set Model values in Holder elements ***********/
holder.text.setText(tempValuesnews.getTitle_news());
holder.text1.setText(tempValuesnews.getText_news());
holder.image.setImageResource(resnews.getIdentifier("com.iranvizhe:drawable/image0",null,null));
/******** Set Item Click Listner for LayoutInflater for each row ***********/
vi.setOnClickListener(new OnItemClickListener(position));
}
return vi;
}
#Override
public void onClick(View v) {
Log.v("CustomAdapter", "=====Row button clicked");
}
/********* Called when Item click in ListView ************/
private class OnItemClickListener implements OnClickListener{
private int mPosition;
OnItemClickListener(int position){
mPosition = position;
}
#Override
public void onClick(View arg0) {
// FragmentAllNews sct = (FragmentAllNews)activitynews;
// Tab1Fragment sct = (Tab1Fragment)activity;
// sct.onItemClick(mPosition);
}
}
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
worldpopulationlistnews.clear();
if (charText.length() == 0) {
worldpopulationlistnews.addAll(arraylistnews);
}
else
{
for (News wp : arraylistnews)
{
if (wp.getTitle_news().toLowerCase(Locale.getDefault()).contains(charText)
| wp.getText_news().toLowerCase(Locale.getDefault()).contains(charText))
{
worldpopulationlistnews.add(wp);
}
}
}
notifyDataSetChanged();
}
}
When I put this code:
// FragmentAllNews sct = (FragmentAllNews)activitynews;
// Tab1Fragment sct = (Tab1Fragment)activity;
// sct.onItemClick(mPosition);
on click does not work for me and I need on click in list view.

Don't use v.setOnclicklistener() in adapter, better use in fragment only as below
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
try {
News tempValues = (News) newsha.get(mPosition);
Toast.makeText(getActivity(), tempValues.getText_news(),
Toast.LENGTH_LONG).show();
} catch (Exception e) {
// Toast.makeText(CustomListView,"no", Toast.LENGTH_LONG).show();
}
}
});

How to populate partial Data into ListView

Still i am populating all JSON data into ListView, but now i want to populate (records into ListView) based on visibility, when user scrolls I want to show progess bar for 5 seconds and then want to populate more records (those will be visible to user) and so on...
I don't want to populate all data into ListView for the first time !
MainActivity.java:
public class MainActivity extends Activity {
ArrayList<Main> arrayList;
MainAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
arrayList = new ArrayList<Main>();
new JSONAsyncTask().execute("....");
ListView listview = (ListView)findViewById(R.id.list);
adapter = new MainAdapter(getApplicationContext(), R.layout.row, arrayList);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), arrayList.get(position).getTitle(), Toast.LENGTH_LONG).show();
}
});
}
class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(MainActivity.this);
dialog.setMessage("Loading, please wait");
dialog.show();
dialog.setCancelable(false);
}
#Override
protected Boolean doInBackground(String... urls) {
try {
//------------------>>
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
// StatusLine stat = response.getStatusLine();
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsono = new JSONObject(data);
JSONArray jarray = jsono.getJSONArray("data");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Main main = new Main();
main.setTitle(object.getString("title"));
Log.v("title:", object.getString("title"));
arrayList.add(main);
}
return true;
}
//------------------>>
} catch (ParseException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
dialog.cancel();
adapter.notifyDataSetChanged();
if(result == false)
Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();
}
}
}
MainAdapter.java:
public class MainAdapter extends BaseAdapter {
ArrayList<Main> arrayList;
LayoutInflater layoutInflater;
int resource;
ViewHolder viewHolder;
public MainAdapter(Context context, int resource, ArrayList<Main> arrayList) {
this.layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.resource = resource;
this.arrayList = arrayList;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return arrayList.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return arrayList.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) {
// convert view = design
View view = convertView;
if (view == null) {
viewHolder = new ViewHolder();
view = layoutInflater.inflate(resource, null);
viewHolder.tvName = (TextView) view.findViewById(R.id.tvName);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
viewHolder.tvName.setText(arrayList.get(position).getTitle());
return view;
}
static class ViewHolder {
public TextView tvName;
}
}

You can try using this library (Android-Infinite-Scroll-Listview)
I've used it before and it's easy to work with.

How to update listview when loading next new items android?

hi i have popup button. When I click pop up button, it displays radio button.For every radio button selection, I am fetching datas and updating in UI.
Problem is for first radio button it is updating UI. But for second radio button and so on, UI is not updating. How to solve this?
Code is as follows:
public class DataList extends Activity {
private Button popUpClick;
private Dialog sortFilterDialog;
private RadioGroup radioGroup;
private RadioButton ascToDesradioButton, desToAscradioButton,
highToLowradioButton, lowToHighradioButton, popularityradioButton;
private int popupselectionItem;
private ImageView closeButton;
private String sessionId;
private String sortName,sortOrder;
ArrayList<SortFilterProducts> personsList;
private ListView list;
private DataListAdapter gridAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.sortfilterclick);
personsList= new ArrayList<SortFilterProducts>();
popUpClick = (Button) findViewById(R.id.popupButton);
list=(ListView)findViewById(R.id.sortFilterList);
gridAdapter = new DataListAdapter(this, R.layout.sort_filter_listrow, personsList);
list.setAdapter(gridAdapter);
popUpClick.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
sortFilterDialog = new Dialog(SortFilterPopupActivity.this);
sortFilterDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
sortFilterDialog.setContentView(R.layout.sortfilterrow);
radioGroup = (RadioGroup) sortFilterDialog
.findViewById(R.id.radioGroup);
ascToDesradioButton = (RadioButton) sortFilterDialog
.findViewById(R.id.asc_to_des);
desToAscradioButton = (RadioButton) sortFilterDialog
.findViewById(R.id.des_to_asc);
highToLowradioButton = (RadioButton) sortFilterDialog
.findViewById(R.id.high_to_low);
lowToHighradioButton = (RadioButton) sortFilterDialog
.findViewById(R.id.low_to_high);
popularityradioButton = (RadioButton) sortFilterDialog
.findViewById(R.id.popularity);
ascToDesradioButton
.setOnClickListener(radioButtonOnClickListener);
desToAscradioButton
.setOnClickListener(radioButtonOnClickListener);
highToLowradioButton
.setOnClickListener(radioButtonOnClickListener);
lowToHighradioButton
.setOnClickListener(radioButtonOnClickListener);
popularityradioButton
.setOnClickListener(radioButtonOnClickListener);
}
private final OnClickListener radioButtonOnClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
switch (popupselectionItem = v.getId()) {
case R.id.asc_to_des:
sortName="atoz";
sortOrder="SORT_ASC";
new SortFilterElement().execute();
//new AscToDesElements().execute();
break;
case R.id.des_to_asc:
sortName="atoz";
sortOrder="SORT_DESC";
new SortFilterElement().execute();
//new DescToAscElements().execute();
break;
case R.id.high_to_low:
sortName="lowtohigh";
sortOrder="SORT_ASC";
new SortFilterElement().execute();
//new PriceHightoLow().execute();
break;
case R.id.low_to_high:
sortName="lowtohigh";
sortOrder="SORT_DESC";
//new PriceLowtoHigh().execute();
new SortFilterElement().execute();
break;
case R.id.popularity:
sortName="popularity";
sortOrder="SORT_ASC";
//new Popularity().execute();
new SortFilterElement().execute();
break;
default:
}
sortFilterDialog.dismiss();
}
class SortFilterElement extends AsyncTask<String,String,String>{
ProgressDialog dialog;
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog=new ProgressDialog(SortFilterPopupActivity.this);
dialog.setMessage("Loading, please wait");
dialog.setTitle("Connecting server");
dialog.show();
dialog.setCancelable(false);
}
#Override
protected String doInBackground(String... args) {
try {
SoapSerializationEnvelope env = new SoapSerializationEnvelope(
SoapSerializationEnvelope.VER11);
env.dotNet = false;
env.xsd = SoapSerializationEnvelope.XSD;
env.enc = SoapSerializationEnvelope.ENC;
if (sessionId == null) {
JSONObject json = new JSONObject();
json.put("page", "1");
json.put("limit", "10");
json.put("sort_name", sortName);
json.put("sort_order", sortOrder);
String params = json.toString();
requests.addProperty("args", params);
env.setOutputSoapObject(requests);
androidHttpTransport.call("", env);
Object results = env.getResponse();
Log.e("Sort results", results.toString());
if (results.toString() != null) {
JSONObject jsono = new JSONObject(results
.toString());
JSONArray jarray = jsono
.getJSONArray("result");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
SortFilterProducts products = new SortFilterProducts();
String id = object.getString("id");
int productPrice = object.getInt("price");
String imageUrl = object
.getString("image_url");
int ratings=object.getInt("ratings");
products.setProductName(productName);
products.setImageUrl(imageUrl);
personsList.add(products);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.cancel();
gridAdapter.notifyDataSetChanged();
}
}
};
});
}
}
and My DataListAdapter:
public class DataListAdapter extends BaseAdapter {
LayoutInflater layoutInflater;
int Resource;
ViewHolder viewHolder;
Activity activity;
public ImageLoader loader;
private final ArrayList<SortFilterProducts> itemLists;
public DataListAdapter(Activity a, int resource,
ArrayList<SortFilterProducts> itemList) {
layoutInflater = (LayoutInflater) a
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
itemLists = itemList;
activity = a;
loader = new ImageLoader(a.getApplicationContext());
}
#Override
public int getCount() {
return itemLists.size();
}
#Override
public Object getItem(int position) {
return itemLists.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v= convertView;
try {
if(v==null){
viewHolder = new ViewHolder();
v = layoutInflater.inflate(Resource, null);
viewHolder.productName=(TextView)v.findViewById(R.id.productName);
viewHolder.productPrice=(TextView)v.findViewById(R.id.price);
v.setTag(viewHolder);
}
else{
viewHolder = (ViewHolder) v.getTag();
}
final String productName=itemLists.get(position).getProductName();
final int productPrice=itemLists.get(position).getProductPrice();
viewHolder.productName.setText(productName);
viewHolder.productPrice.setText(Integer.toString(productPrice));
}
catch (Exception ex) {
ex.printStackTrace();
}
return v;
}
static class ViewHolder {
public TextView productName,productPrice;
}
}

Invalidate the items of the ListView while expanding the ArrayList<SortFilterProducts> passed to adapter.
list.invalidateViews();
Good Luck. :)

As I mention in comments, you should call notifyDataSetChanged() method after adding new objects to your list.
First of all, add following method to your DataListAdapter
public void addItem(SortFilterProducts product) {
itemLists.add(product);
notifyDataSetChanged();
}
Then, remove the line personsList.add(products); on your onCreate() method and add the following line.
DataListAdapter adapter = (DataListAdapter)list.getAdapter();
adapter.addItem(products);
Your ListView automatically updated whenever new item is added.
Hope this may help.

Custom adapter never empty

I've custom adapter that populates custom listview with data fetched from server. What I want is check if adapter is empty and append data to listview if it is empty else fill the listview with data and notifyDataSetChanged. I'm implementing OnScrollListener to load more data from server. But adapter never is empty and always notifyDataSetChanged is called.
My List Activity
public class ListResultActivity extends Activity implements OnScrollListener{
private ArrayList<BusinessListData> businesses;
private ListView businessList;
private LayoutInflater layoutInflator;
private BusinessListIconTask imgFetcher;
BusinessListDataAdapter adapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.businesslist);
this.businessList = (ListView) findViewById(R.id.lvBusinesslist);
this.adapter= new BusinessListDataAdapter(this,
this.imgFetcher, this.layoutInflator, this.businesses);
getData();
businessList.setOnScrollListener(this);
}
#Override
public Object onRetainNonConfigurationInstance() {
Object[] myStuff = new Object[2];
myStuff[0] = this.businesses;
myStuff[1] = this.imgFetcher;
return myStuff;
}
/**
* Bundle to hold refs to row items views.
*
*/
public static class MyViewHolder {
public TextView businessName, businessAddress, phoneNo;
public Button btnProfile;
public ImageView icon;
public BusinessListData business;
}
public void setBusinesses(ArrayList<BusinessListData> businesses) {
this.imgFetcher = new BusinessListIconTask(this);
this.layoutInflator = LayoutInflater.from(this);
this.businesses = businesses;
if(adapter !=null){
this.adapter.notifyDataSetChanged();
}else{
this.adapter= new BusinessListDataAdapter(this,
this.imgFetcher, this.layoutInflator, this.businesses);
businessList.setAdapter(adapter);
}
}
private void getData() {
// TODO Auto-generated method stub
Intent myIntent = getIntent();
// gets the arguments from previously created intent
String metroTxt = myIntent.getStringExtra("key");
String metroLoc = myIntent.getStringExtra("loc");
String metroId = myIntent.getStringExtra("qt");
BusinessListApiTask spTask = new BusinessListApiTask(
ListResultActivity.this);
try {
spTask.execute(metroTxt, metroLoc, metroId);
} catch (Exception e) {
spTask.cancel(true);
}
}
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub
if (businessList.getLastVisiblePosition() == totalItemCount - 1) {
getData();
adapter.notifyDataSetChanged();
Log.d("test count", "abc"+totalItemCount);
}
}
}
Class to fetch data from server and set to adapter
public class BusinessListApiTask extends AsyncTask<String, Integer, String> {
private ProgressDialog progDialog;
private Context context;
private ListResultActivity activity;
private static final String debugTag = "sodhpuch";
HashMap<String, String> queryValues;
/**
* Construct a task
*
* #param activity
*/
public BusinessListApiTask(ListResultActivity activity) {
// TODO Auto-generated constructor stub
super();
this.activity = activity;
this.context = this.activity.getApplicationContext();
}
#Override
protected void onPreExecute() {
super.onPreExecute();
progDialog = ProgressDialog.show(this.activity, "Search", this.context
.getResources().getString(R.string.looking_for_business), true,
false);
}
#Override
protected String doInBackground(String... params) {
try {
// Log.d(debugTag, "Background:" +
// Thread.currentThread().getName());
String result = BusinessListHelper.downloadFromServer(params);
// try {
//
// updateSQLite(result);
//
// } catch (Exception e) {
// return result;
// }
Log.d("result", result);
return result;
} catch (Exception e) {
return new String();
}
}
#Override
protected void onPostExecute(String result) {
ArrayList<BusinessListData> businessData = new ArrayList<BusinessListData>();
progDialog.dismiss();
try {
JSONObject respObj = new JSONObject(result);
int success = respObj.getInt("success");
Log.d("Success", "abc"+success);
if (success == 1) {
JSONArray tracks = respObj.getJSONArray("idioms");
for (int i = 0; i < tracks.length(); i++) {
JSONObject track = tracks.getJSONObject(i);
String businessName = track.getString("name");
String businessAddress = track.getString("address");
String phone = track.getString("phone");
String id = track.getString("id");
String deals_in = track.getString("deals_in");
businessData.add(new BusinessListData(businessName,
businessAddress, id, phone, deals_in));
}
} else {
Log.d("Success", "first"+success);
// Log.d(debugTag, "Background:" + result);
// DBController controller = new DBController(context);
// businessData = controller.getBusinessList();
return ;
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// }
this.activity.setBusinesses(businessData);
}
My Adapter
public class BusinessListDataAdapter extends BaseAdapter implements
OnClickListener {
private static final String debugTag = "BusinessListDataAdapter";
private ListResultActivity activity;
private BusinessListIconTask imgFetcher;
private LayoutInflater layoutInflater;
private ArrayList<BusinessListData> businesses;
BusinessListData business;
public BusinessListDataAdapter(ListResultActivity a,
BusinessListIconTask i, LayoutInflater l,
ArrayList<BusinessListData> data) {
this.activity = a;
this.imgFetcher = i;
this.layoutInflater = l;
this.businesses = data;
}
#Override
public int getCount() {
return this.businesses.size();
}
public void clear()
{
businesses.clear();
notifyDataSetChanged();
}
#Override
public boolean areAllItemsEnabled() {
return true;
}
#Override
public Object getItem(int arg0) {
return null;
}
#Override
public long getItemId(int pos) {
return pos;
}
#Override
public View getView(int pos, View convertView, ViewGroup parent) {
MyViewHolder holder;
if (convertView == null) {
convertView = layoutInflater.inflate(R.layout.trackrow, parent,
false);
holder = new MyViewHolder();
holder.businessName = (TextView) convertView
.findViewById(R.id.tvBusinessName);
holder.businessAddress = (TextView) convertView
.findViewById(R.id.tvAddress);
holder.phoneNo = (TextView) convertView.findViewById(R.id.tvPhone);
holder.icon = (ImageView) convertView.findViewById(R.id.album_icon);
holder.btnProfile = (Button) convertView
.findViewById(R.id.btnProfile);
holder.btnProfile.setTag(holder);
convertView.setTag(holder);
} else {
holder = (MyViewHolder) convertView.getTag();
}
convertView.setOnClickListener(this);
business= businesses.get(pos);
holder.business = business;
holder.businessName.setText(business.getName());
holder.businessAddress.setText(business.getAddress());
holder.phoneNo.setText(business.getPhone());
holder.btnProfile.setOnClickListener(this);
// if(track.getImageUrl() != null) {
// holder.icon.setTag(track.getImageUrl());
// Drawable dr = imgFetcher.loadImage(this, holder.icon);
// if(dr != null) {
// holder.icon.setImageDrawable(dr);
// }
// } else {
holder.icon.setImageResource(R.drawable.filler_icon);
// }
return convertView;
}
#Override
public void onClick(View v) {
String deals_in = business.getDeals().toString();
Log.d("name", deals_in);
MyViewHolder holder = (MyViewHolder) v.getTag();
if (v instanceof Button) {
Intent profile = new Intent(activity,
ProfileActivity.class);
profile.putExtra("deals_in", deals_in);
profile.putExtra("phone", holder.business.getPhone());
profile.putExtra("address", holder.business.getAddress());
profile.putExtra("name", holder.business.getName());
this.activity.startActivity(profile);
} else if (v instanceof View) {
Log.d("test","call testing");
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" +holder.business.getPhone()));
this.activity.startActivity(intent);
}
Log.d(debugTag, "OnClick pressed.");
}
}

Try this way,hope this will help you to solve your problem.
public void setBusinesses(ArrayList<BusinessListData> businesses) {
imgFetcher = new BusinessListIconTask(this);
layoutInflator = LayoutInflater.from(this);
if(this.businesses == null || adapter==null){
this.businesses = new ArrayList<BusinessListData>();
adapter= new BusinessListDataAdapter(this,imgFetcher,layoutInflator,this.businesses);
businessList.setAdapter(adapter);
}
this.businesses.addAll(businesses);
adapter.notifyDataSetChanged();
}

You have the adapter object in your setBusinesses Method. You just need to check the size of the adapter too as follows which is solve your problem.
if(adapter !=null && adapter.getCount()>0)
{
this.adapter.notifyDataSetChanged();
}
else
{
this.adapter= new BusinessListDataAdapter(this,
this.imgFetcher, this.layoutInflator, this.businesses);
businessList.setAdapter(adapter);
}
this will check the size of your BusinessListData object in the adapter and this will not initialize the adapter again and again.
Hope this Solves your problem.
Thank You!

Change use of OnScrollListener. Use Asynctask class and onPreExecute() set adapter as null. Load data in doInBackground() method and call custom adapter in onPostExecute(). I hope it 'll work fine.