Android:Receive Array of Objects and display in listView

Android:Receive Array of Objects and display in listView - android

Hello to all android folks over there!!
I want to get list of objects from web service and want to display them in list view.Now i am able to fetch those values and collected them in arraylist.But i am facing problem to display them in list view.below is my code.
Using everyones suggestion ,i solved my problem.Thats the spirit of android buddies.I am pasting my answer in UPDATED block.Hope it will be helpful in future.
UPDATED
public class TabFragment2 extends android.support.v4.app.Fragment {
ListView FacultyList;
View rootView;
LinearLayout courseEmptyLayout;
FacultyListAdapter facultyListAdapter;
String feedbackresult,programtype,programname;
Boolean FeedBackResponse;
String FacultiesList[];
public ArrayList<Faculty> facultylist = new ArrayList<Faculty>();
SharedPreferences pref;
FacultyListAdapter adapter;
SessionSetting session;
public TabFragment2(){
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
pref = getActivity().getSharedPreferences("prefbook", getActivity().MODE_PRIVATE);
programtype = pref.getString("programtype", "NOTHINGpref");
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.activity_studenttab2, container, false);
session = new SessionSetting(getActivity());
new FacultySyncerBg().execute("");
courseEmptyLayout = (LinearLayout) rootView.findViewById(R.id.feedback_empty_layout);
FacultyList = (ListView) rootView.findViewById(R.id.feedback_list);
facultyListAdapter = new FacultyListAdapter(getActivity());
FacultyList.setEmptyView(rootView.findViewById(R.id.feedback_list));
FacultyList.setAdapter(facultyListAdapter);
return rootView;
}
public class FacultyListAdapter extends BaseAdapter {
private final Context context;
public FacultyListAdapter(Context context) {
this.context = context;
if (!facultylist.isEmpty())
courseEmptyLayout.setVisibility(LinearLayout.GONE);
}
#Override
public View getView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder TabviewHolder;
if (convertView == null) {
TabviewHolder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_item_feedback,
parent, false);
TabviewHolder.FacultyName = (TextView) convertView.findViewById(R.id.FacultyName);//facultyname
TabviewHolder.rating = (RatingBar) convertView.findViewById(R.id.rating);//rating starts
TabviewHolder.Submit = (Button) convertView.findViewById(R.id.btnSubmit);
// Save the holder with the view
convertView.setTag(TabviewHolder);
} else {
TabviewHolder = (ViewHolder) convertView.getTag();
}
final Faculty mFac = facultylist.get(position);//*****************************NOTICE
TabviewHolder.FacultyName.setText(mFac.getEmployeename());
// TabviewHolder.ModuleName.setText(mFac.getSubject());
TabviewHolder.rating.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
feedbackresult =String.valueOf(rating);
}
});
return convertView;
}
#Override
public int getCount() {
return facultylist.size();
}
#Override
public Object getItem(int position) {return facultylist.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
}
static class ViewHolder {
TextView FacultyName;
RatingBar rating;
Button Submit;
}
private class FacultySyncerBg extends AsyncTask<String, Integer, Void> {
ProgressDialog progressDialog;
#Override
protected void onPreExecute() {
progressDialog= ProgressDialog.show(getActivity(), "Faculty Feedback!","Fetching Faculty List", true);
}
#Override
protected Void doInBackground(String... params) {
//CALLING WEBSERVICE
Faculty(programtype);
return null;
}
#Override
protected void onPostExecute(Void result) {
/*if (FacultyList.getAdapter() != null) {
if (FacultyList.getAdapter().getCount() == 0) {
FacultyList.setAdapter(facultyListAdapter);
} else
{
facultyListAdapter.notifyDataSetChanged();
}
} else {
FacultyList.setAdapter(facultyListAdapter);
}
progressDialog.dismiss();*/
if (!facultylist.isEmpty()) {
// FacultyList.setVisibiltity(View.VISIBLE) ;
courseEmptyLayout.setVisibility(LinearLayout.GONE);
if (FacultyList.getAdapter() != null)
{
if (FacultyList.getAdapter().getCount() == 0)
{
FacultyList.setAdapter(facultyListAdapter);
}
else
{
facultyListAdapter.notifyDataSetChanged();
}
}
else
{
FacultyList.setAdapter(facultyListAdapter);
}
}else
{
courseEmptyLayout.setVisibility(LinearLayout.VISIBLE);
// FacultyList.setVisibiltity(View.GONE) ;
}
progressDialog.dismiss();
}
}
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser && isResumed()) {
new FacultySyncerBg().execute("");
}
}//end*
//**************************WEBSERVICE CODE***********************************
public void Faculty(String programtype)
{
String URL ="http://detelearning.cloudapp.net/det_skill_webservice/service.php?wsdl";
String METHOD_NAMEFACULTY = "getUserInfo";
String NAMESPACEFAC="http://localhost", SOAPACTIONFAC="http://detelearning.cloudapp.net/det_skill_webservice/service.php/getUserInfo";
String faculty[]=new String[4];//changeit
String webprogramtype="flag";
String programname="DESHPANDE SUSANDHI ELECTRICIAN FELLOWSHIP";
// Create request
SoapObject request = new SoapObject(NAMESPACEFAC, METHOD_NAMEFACULTY);
request.addProperty("fellowshipname", programname);
// Create envelope
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
// Set output SOAP object
envelope.setOutputSoapObject(request);
// Create HTTP call object
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try {
//my code Calling Soap Action
androidHttpTransport.call(SOAPACTIONFAC, envelope);
// ArrayList<Faculty> facultylist = new ArrayList<Faculty>();
java.util.Vector<SoapObject> rs = (java.util.Vector<SoapObject>) envelope.getResponse();
if (rs != null)
{
for (SoapObject cs : rs)
{
Faculty rp = new Faculty();
rp.setEmployeename(cs.getProperty(0).toString());//program name
rp.setEmployeeid(cs.getProperty(1).toString());//employee name
facultylist.add(rp);
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}

if (lstView.getAdapter() != null) {
if (lstView.getAdapter().getCount() == 0) {
lstView.setAdapter(finalAdapter);
} else {
finalAdapter.notifyDataSetChanged();
}
} else {
lstView.setAdapter(finalAdapter);
}
and setVisibiltity(View.VISIBLE)for listview
Put this code here
#Override
protected void onPostExecute(Void result) {
if (!facultylist.isEmpty()) {
FacultyList.setVisibiltity(View.VISIBLE) ;
courseEmptyLayout.setVisibility(LinearLayout.GONE);
if (FacultyList.getAdapter() != null) {
if (FacultyList.getAdapter().getCount() == 0) {
FacultyList.setAdapter(facultyListAdapter);
} else {
facultyListAdapter.notifyDataSetChanged();
}
} else {
FacultyList.setAdapter(facultyListAdapter);
}
}else{
courseEmptyLayout.setVisibility(LinearLayout.VISIBLE);
FacultyList.setVisibiltity(View.GONE) ;
}
progressDialog.dismiss();
}

you can try this:
this is the adapter class code.
public class CustomTaskHistory extends ArrayAdapter<String> {
private Activity context;
ArrayList<String> listTasks = new ArrayList<String>();
String fetchRefID;
StringBuilder responseOutput;
ProgressDialog progress;
String resultOutput;
public String getFetchRefID() {
return fetchRefID;
}
public void setFetchRefID(String fetchRefID) {
this.fetchRefID = fetchRefID;
}
public CustomTaskHistory(Activity context, ArrayList<String> listTasks) {
super(context, R.layout.content_main, listTasks);
this.context = context;
this.listTasks = listTasks;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View listViewItem = inflater.inflate(R.layout.list_task_history, null, true);
TextView textViewName = (TextView) listViewItem.findViewById(R.id.textViewName);
LinearLayout linearLayout = (LinearLayout) listViewItem.findViewById(R.id.firstLayout);
//System.out.println("client_id" + _clientID);
//TextView textViewDesc = (TextView) listViewItem.findViewById(R.id.textViewDesc);
//ImageView image = (ImageView) listViewItem.findViewById(R.id.imageView);
if (position % 2 != 0) {
linearLayout.setBackgroundResource(R.color.sky_blue);
} else {
linearLayout.setBackgroundResource(R.color.white);
}
textViewName.setText(listTasks.get(position));
return listViewItem;
}
}
and now in the parent class you must have already added a list view in your xml file so now display code for it is below:
CustomTaskHistory customList = new CustomTaskHistory(TaskHistory.this, task_history_name);
listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(customList);
you can also perform any action on clicking cells of listview.If needed code for it is below add just below the above code:
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent nextScreen2 = new Intent(getApplicationContext(), SubscribeProgrammes.class);
nextScreen2.putExtra("CLIENT_ID", _clientID);
nextScreen2.putExtra("REFERENCE_ID", reference_IDs.get(i));
startActivity(nextScreen2);
Toast.makeText(getApplicationContext(), "You Clicked " + task_list.get(i), Toast.LENGTH_SHORT).show();
}
});

Related

How to set some item unclickable in GridView

For example, I need to judge the contents of the item in the Item can be clicked.
enter image description here
As shown in the picture, I need to get the gray Item cannot be clicked.
Here is my adapter
public class RoomAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private Context mContext;
private List<Room> mDatas;
public RoomAdapter(Context context, List<Room> mDatas) {
mInflater = LayoutInflater.from(context);
this.mContext = context;
this.mDatas = mDatas;
}
#Override
public int getCount() {
return mDatas.size();
}
#Override
public Object getItem(int position) {
return mDatas.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
Room room = mDatas.get(position);
ViewHolder viewHolder = null;
View view;
if (convertView == null) {
viewHolder = new ViewHolder();
view = mInflater.inflate(R.layout.roomstate_item, null);
viewHolder.tv_roomstate = (TextView) view.findViewById(R.id.tv_roomstate);
viewHolder.tv_roomnumber = (TextView) view.findViewById(R.id.tv_roomnumber);
viewHolder.tv_roomtype = (TextView) view.findViewById(R.id.tv_roomtype);
viewHolder.tv_roomprice = (TextView) view.findViewById(R.id.tv_roomprice);
view.setTag(viewHolder);
}else{
view = convertView;
viewHolder = (ViewHolder) view.getTag();
}
// String nu = room.getRoom_number();
viewHolder.tv_roomstate.setText(room.getRoom_status());
viewHolder.tv_roomnumber.setText(room.getRoom_number());
viewHolder.tv_roomtype.setText(room.getRoomType().getRoom_type_name());
viewHolder.tv_roomprice.setText(room.getRoomType().getRoom_type_price());
if (room.getRoom_status().equals("0") &&room.getRoomType().getRoom_type_name().equals("0")) {
view.setBackgroundResource(R.drawable.single);
view.setClickable(false);
} else if (room.getRoom_status().equals("1") && room.getRoomType().getRoom_type_name().equals("0")) {
view.setBackgroundResource(R.drawable.single_b);
} else if (room.getRoom_status().equals("1") && room.getRoomType().getRoom_type_name().equals("1")) {
view.setBackgroundResource(R.drawable.double_b);
} else if(room.getRoom_status().equals("0") && room.getRoomType().getRoom_type_name().equals("1")){
view.setClickable(false);
view.setBackgroundResource(R.drawable.doubleg);
}
return view;
}
private class ViewHolder {
TextView tv_roomnumber;
TextView tv_roomstate;
TextView tv_roomtype;
TextView tv_roomprice;
}
}
Here is my Activity
public class RoomList extends Activity {
private ImageView iv_back;
private TextView tv_hotelname;
private GridView griv_hotel;
private RoomAdapter adapter;
private String hotelname;
private String url
= "http://jm/user/room/selectRoomByHotelName?hotel_name=";
private List<Room> mRoom;
private RoomType mRoomType;
private boolean isfinish = false;//判断请求是否完成
private String hotel_address;
private String hotel_id;
private Bundle mBundle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_book_room_list);
init();
sendRequestWithOkHttp();
boolean is = true;
while (is) {
if (isfinish) {
adapter = new RoomAdapter(this, mRoom);
griv_hotel.setAdapter(adapter);
griv_hotel.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView tv_roomnumber = (TextView) view.findViewById(R.id.tv_roomnumber);
TextView tv_roomstate = (TextView) view.findViewById(R.id.tv_roomstate);
TextView tv_roomprice = (TextView) view.findViewById(R.id.tv_roomprice);
TextView tv_roomtype = (TextView) view.findViewById(R.id.tv_roomtype);
String roomnumber = tv_roomnumber.getText().toString();
String roomstate = tv_roomstate.getText().toString();
String roomtype = tv_roomtype.getText().toString();
String roomprice = tv_roomprice.getText().toString();
Log.e("房间类型",roomtype);
// if (roomstate.equals("0") && roomtype.equals("0")) {
// view.setClickable(false);
// } else if (roomstate.equals("1") && roomtype.equals("0")) {
// view.setClickable(true);
// } else if (roomstate.equals("1") && roomtype.equals("1")) {
// view.setClickable(true);
// } else {
// view.setClickable(false);
// }
mBundle.putString("roomnumber", roomnumber);
mBundle.putString("roomstate", roomstate);
mBundle.putString("roomtype", roomtype);
mBundle.putString("roomprice", roomprice);
mBundle.putString("hoteladdress", hotel_address);
mBundle.putString("hotelid", hotel_id);
Intent intent = new Intent(RoomList.this, BookRoomDetail.class);
intent.putExtras(mBundle);
startActivity(intent);
}
});
is = false;
}
}
}
private void init() {
initView();
initEvents();
}
private void initEvents() {
iv_back.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
}
private void initView() {
iv_back = (ImageView) findViewById(R.id.iv_back);
tv_hotelname = (TextView) findViewById(R.id.tv_hotelname);
mBundle = getIntent().getExtras();
hotelname = mBundle.getString("hotelname");
tv_hotelname.setText(hotelname);
griv_hotel = (GridView) findViewById(R.id.griv_hotel);
}
private void sendRequestWithOkHttp() {
new Thread(new Runnable() {
#Override
public void run() {
MediaType MEDIA_TYPE_MARKDOWN
= MediaType.parse("text/x-markdown; charset=utf-8");
try {
OkHttpClient client = new OkHttpClient();
String postBody = hotelname;
Request request = new Request.Builder()
.url(url + hotelname)
.post(RequestBody.create(MEDIA_TYPE_MARKDOWN, postBody))
.build();
Response response = client.newCall(request).execute();
String responseData = response.body().string();
try {
parseJSON(responseData);
isfinish = true;
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
private void parseJSON(String responseData) throws JSONException {
JSONArray JSONArray = new JSONArray(responseData);
mRoom = new ArrayList<Room>();
for (int i = 0; i < JSONArray.length(); i++) {
try {
JSONObject JSON = JSONArray.getJSONObject(i);
String room_number = JSON.getString("room_number");
String room_status = JSON.getString("room_status");
JSONObject jsonObject = JSON.getJSONObject("roomType");
String room_type_name = jsonObject.getString("room_type_name");
String room_type_price = jsonObject.getString("room_type_price");
JSONObject jsonObj = JSON.getJSONObject("hotel");
hotel_id = String.valueOf(jsonObj.getInt("hotel_id"));
hotel_address = jsonObj.getString("hotel_location");
mRoomType = new RoomType(null, room_type_name, room_type_price, null, null);
mRoom.add(new Room(null, room_number, room_status, null, null, mRoomType));
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
I set view.setClickable (false)in my Adapter, but it does not work.

item.setEnabled(false);
when u need to make it clickable call
item.setEnabled(true);
Here item is your edittext or button or anything else
Try this:
if (room.getRoom_status().equals("0") &&room.getRoomType().getRoom_type_name().equals("0")) {
view.setBackgroundResource(R.drawable.single);
view.setEnabled(false);
} else if (room.getRoom_status().equals("1") && room.getRoomType().getRoom_type_name().equals("0")) {
view.setBackgroundResource(R.drawable.single_b);
} else if (room.getRoom_status().equals("1") && room.getRoomType().getRoom_type_name().equals("1")) {
view.setBackgroundResource(R.drawable.double_b);
} else if(room.getRoom_status().equals("0") && room.getRoomType().getRoom_type_name().equals("1")){
view.setEnabled(false);
view.setBackgroundResource(R.drawable.doubleg);
}
else
view.setEnabled(true);

The right way is to write a Boolean value, and let it based on a Boolean value to determine whether to jump.
private boolean checkedIntent = false;
if (roomstate.equals("0") && roomtype.equals("0")) {
checkedIntent = false;
} else if (roomstate.equals("1") && roomtype.equals("0")) {
checkedIntent = true;
} else if (roomstate.equals("1") && roomtype.equals("1")) {
checkedIntent = true;
} else if (roomstate.equals("0") && roomtype.equals("1")) {
checkedIntent = false;
}
if (checkedIntent == true) {
Intent intent = new Intent(RoomList.this, BookRoomDetail.class);
intent.putExtras(mBundle);
startActivity(intent);
}

listview hide on orientation change android

I am using custom list view inside fragment(From Api). on orientation change data is still in array list and also list view get notified but it hides when screen rotates.
here is the code:
public class FragNotice extends Fragment implements View.OnClickListener {
ListAdapter listAdapter;
ListView listView;
EditText editTextNotice;
private Button btnSearch;
private Button btnClear;
private int incre = 1;
private boolean boolScroll = true;
public FragNotice() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler(getActivity()));
setRetainInstance(true);
search(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return init(inflater.inflate(R.layout.notice_activity, container, false));
}
private View init(View view) {
editTextNotice = (EditText) view.findViewById(R.id.editTextNotice);
btnSearch = (Button) view.findViewById(R.id.btnSearch);
btnSearch.setOnClickListener(this);
btnClear = (Button) view.findViewById(R.id.btnClear);
btnClear.setOnClickListener(this);
listView = (ListView) view.findViewById(R.id.listViewNotice);
listView.setOnScrollListener(onScrollListener());
return view;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
if (listAdapter==null) {
listAdapter=new ListAdapter(getActivity(), new ArrayList<ListRowItem>());
listView.setAdapter(listAdapter);
listAdapter.notifyDataSetChanged();
}
}
AsyncRequest.OnAsyncRequestComplete onAsyncRequestComplete = new AsyncRequest
.OnAsyncRequestComplete() {
#Override
public void asyncResponse(String response, int apiKey) {
switch (apiKey) {
case 1:
listView(response);
break;
}
}
};
#Override
public void onClick(View v) {
if (v.getId() == R.id.btnClear) {
incre = 1;
boolScroll = true;
editTextNotice.setText(null);
if (listAdapter != null)
listAdapter.clear();
search(true);
} else if (v.getId() == R.id.btnSearch) {
String std = editTextNotice.getText().toString();
if (std.trim().length() > 1) {
incre = 1;
boolScroll = true;
if (listAdapter != null)
listAdapter.clear();
try {
InputMethodManager imm = (InputMethodManager) getActivity().getSystemService
(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(new View(getActivity()).getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
} catch (Exception e) {
// TODO: handle exception
}
search(false);
} else
Toast.makeText(getActivity(),
"Please enter atleast two character.", Toast.LENGTH_LONG)
.show();
}
}
class ListAdapter extends ArrayAdapter<ListRowItem> {
private final Context context;
public ListAdapter(Context asyncTask, java.util.List<ListRowItem> items) {
super(asyncTask, R.layout.notice_listitem, items);
this.context = asyncTask;
}
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
final ListRowItem rowItem = getItem(position);
LayoutInflater mInflater = (LayoutInflater) context
.getSystemService(context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.notice_listitem, parent, false);
holder = new ViewHolder();
holder.txtSno = (TextView) convertView.findViewById(R.id.txtSno);
holder.txtNoticePublishDate = (TextView) convertView.findViewById(R.id
.txtNoticePublishDate);
holder.btnView = (Button) convertView.findViewById(R.id.btnView);
holder.txtNoticeDescription = (TextView) convertView.findViewById(R.id
.txtNoticeDescription);
holder.txtNoticeName = (TextView) convertView.findViewById(R.id.txtNoticeName);
convertView.setTag(holder);
} else
holder = (ViewHolder) convertView.getTag();
holder.txtSno.setText(String.valueOf(position + 1));
holder.txtNoticeDescription.setText(new AppUtility().TitleCase(rowItem.getDescription
()));
holder.txtNoticeName.setText(new AppUtility().TitleCase(rowItem.getFileTitle()));
try {
holder.txtNoticePublishDate.setText(String.valueOf((new SimpleDateFormat("dd MMM " +
"yyyy HH:mm:ss", Locale.US)).format((new SimpleDateFormat
("yyyy-MM-dd'T'HH:mm:ss", Locale.US)).parse(rowItem.getUpdateDate()))));
} catch (ParseException e) {
holder.txtNoticePublishDate.setText(new AppUtility().TitleCase(rowItem
.getUpdateDate()));
}
holder.btnView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
}
});
return convertView;
}
/*private view holder class*/
private class ViewHolder {
TextView txtSno;
TextView txtNoticeName;
TextView txtNoticeDescription;
TextView txtNoticePublishDate;
Button btnView;
}
}
class ListRowItem {
private final String FileTitle;
private final String Description;
private final String ContentType;
private final int DocumentUploadID;
private final String UpdateDate;
ListRowItem() {
this.FileTitle = "";
this.Description = "";
this.ContentType = "";
this.DocumentUploadID = 0;
this.UpdateDate = "";
}
ListRowItem(String fileTitle, String description, String contentType, int
documentUploadID, String updateDate) {
this.FileTitle = fileTitle;
this.Description = description;
this.ContentType = contentType;
this.DocumentUploadID = documentUploadID;
this.UpdateDate = updateDate;
}
public String getFileTitle() {
return FileTitle;
}
public int getDocumentUploadID() {
return DocumentUploadID;
}
public String getUpdateDate() {
return UpdateDate;
}
public String getDescription() {
return Description;
}
public String getContentType() {
return ContentType;
}
}
private void listView(String response) {
try {
ArrayList<ListRowItem> lstItem;
if(listAdapter==null){
Type listType = new TypeToken<ArrayList<ListRowItem>>() {
}.getType();
lstItem = new Gson().fromJson(response, listType);
listAdapter = new ListAdapter(getActivity(), lstItem);
} else {
Type listType = new TypeToken<ArrayList<ListRowItem>>() {
}.getType();
lstItem = new Gson().fromJson(response, listType);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
listAdapter.addAll(lstItem);
} else {
for (ListRowItem items : lstItem) {
listAdapter.add(items);
}
}
}
if (listAdapter != null)
listAdapter.notifyDataSetChanged();
} catch (Exception e) {
}
}
private AbsListView.OnScrollListener onScrollListener() {
return new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
int threshold = 5;
int count = listView.getCount();
if (scrollState == SCROLL_STATE_IDLE) {
if (listView.getLastVisiblePosition() >= count - threshold) {
if (boolScroll) {
if (editTextNotice.getText().toString().trim().length() > 0)
search(false);
else
search(true);
}
}
}
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
int totalItemCount) {
}
};
}
private void search(boolean bool) {
String URL;
if (bool) {
URL = new SqLite(getActivity()).returnDefaultURI() + "notice/0/" + incre;
incre = incre + 1;
} else {
URL = new SqLite(getActivity()).returnDefaultURI() + "notice/" +
editTextNotice.getText().toString().trim() + "/" + incre;
incre = incre + 1;
}
AsyncRequest asyncRequest;
if (incre > 2)
asyncRequest = new AsyncRequest(onAsyncRequestComplete, getActivity(), "GET", null,
null, 1);
else
asyncRequest = new AsyncRequest(onAsyncRequestComplete, getActivity(), "GET", null,
"Fetching data", 1);
asyncRequest.execute(URL);
}
}

You need to load the data into the ListView again. You are binding the ListView to an adapter, you need to do it in onConfigurationChanged() method.

When orientation changes the activity reloads again.So you have to override onConfigurationChanged method.
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
//Your Code Here
}
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
//Your Code Here
}
}

create a directory layout-land in the resources copy the your .xml file there align and set the Edittext and Button according to landscape layout .may be it solved your problem if the listview doest not get enough space to show in landscape layout

In onViewCreated(View view, Bundle savedInstanceState) method above you are setting new empty arraylist every time. So the previous items which are loaded are removed from adapter even though it is retained by setRetainInstance(true)
So you should have a Field that holds the arraylist and pass that field to adapter
private ArrayList<ListRowItem> listItems = new ArrayList<>()
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
if (listAdapter==null) {
listAdapter=new ListAdapter(getActivity(), listItems);//pass the Arraylist here
listView.setAdapter(listAdapter);
listAdapter.notifyDataSetChanged();
}
}
Then in private void listView(String response) method, add items to that listview created above as
listItems = new Gson().fromJson(response, listType);
listAdapter.notifyDataSetChanged();

App is keep crashing while accessing the listview

In my app I'm showing data in listview. While scrolling through listview my app is crashing. What changes should I make?
as given in the error my RecipeListFragment.java file is:
public class RecipeListFragment extends Fragment {
MyDatabase db;
boolean isfav = false;
Context context;
ListView lvrecipe;
ArrayList<RecipePojo> recipelist = new ArrayList<RecipePojo>();
LinearLayout ll;
DisplayImageOptions options;
private ProgressDialog progress;
int position;
String recipeid;
int checkcounter = 0;
private Custom_Adapter adapter;
public RecipeListFragment() {
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_recipe_list_actvity, container, false);
context = getActivity();
lvrecipe = (ListView) rootView.findViewById(R.id.lvrecipe);
// adView = (MoPubView)rootView. findViewById(R.id.mopub_sample_ad);
new getrecipe().execute();
db = new MyDatabase(getActivity());
// recipelist = DataManager.recipelist;
position = DataManager.selectedposition;
adapter = new Custom_Adapter(getActivity());
adapter.notifyDataSetChanged();
lvrecipe.setAdapter(adapter);
/* if(recipeid!=null){
checkcounter = db.checkrecipefav(recipeid);
}
if (checkcounter > 0) {
isfav = true;
} else {
isfav = false;
}
db.close();*/
lvrecipe.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
DataManager.selectedposition = position;
Intent i = new Intent(getActivity(), RecipeDescription.class);
i.putExtra("cusinename", DataManager.cusinename);
startActivity(i);
getActivity().finish();
}
});
// adddisplay();
return rootView;
}
#Override
public void onResume() {
super.onResume();
}
public class Custom_Adapter extends BaseAdapter {
private LayoutInflater mInflater;
public Custom_Adapter(Context c) {
mInflater = LayoutInflater.from(c);
}
#Override
public int getCount() {
if (recipelist != null) {
return recipelist.size();
} else {
return 0;
}
}
#Override
public Object getItem(int position) {
if (recipelist != null) {
return recipelist.get(position);
} else {
return 0;
}
}
#Override
public long getItemId(int position) {
if (recipelist != null) {
return position;
} else {
return 0;
}
}
#SuppressWarnings("deprecation")
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.recipelist, null);
holder = new ViewHolder();
holder.txttile = (TextView) convertView.findViewById(R.id.txttile);
holder.imgrecipe = (ImageView) convertView.findViewById(R.id.imgrecipe);
holder.fav_unfav = (ImageView) convertView.findViewById(R.id.fav_unfav);
holder.ratingbar = (RatingBar) convertView.findViewById(R.id.ratingbar);
holder.txtduration = (TextView) convertView.findViewById(R.id.txtduration);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if (recipelist != null) {
recipeid = recipelist.get(position).getRecipeid();
checkcounter = db.checkrecipefav(recipeid);
}
if (checkcounter > 0) {
isfav = true;
} else {
isfav = false;
}
db.close();
if (isfav) {
holder.fav_unfav.setImageResource(R.drawable.favourite);
} else {
holder.fav_unfav.setImageResource(R.drawable.favourites);
}
Typeface face1 = Typeface.createFromAsset(getActivity().getAssets(), "sinkin_sans_300_light.ttf");
Typeface face2 = Typeface.createFromAsset(getActivity().getAssets(), "sinkin_sans_400_regular.ttf");
holder.txttile.setTypeface(face2);
holder.txtduration.setTypeface(face1);
holder.txttile.setText(recipelist.get(position).getRecipename());
try {
String[] prep = recipelist.get(position).getPrep_time().split(" ");
String[] cook = recipelist.get(position).getCooking_time().split(" ");
int totalTime = Integer.parseInt(prep[0]) + Integer.parseInt(cook[0]);
holder.txtduration.setText(""+totalTime+" min");
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
String url = DataManager.photourl + "recipe/" + recipelist.get(position).getRecipeid() + ".jpg";
try {
url = URLDecoder.decode(url, "UTF-8");
url = url.replaceAll(" ", "%20");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
if (recipelist.get(position).getVideo_link().equals("none")) {
// holder.imgvideo.setVisibility(View.GONE);
}
String rating = recipelist.get(position).getRatings();
if (rating != null && rating.trim().length() > 0) {
holder.ratingbar.setRating(Float.valueOf(rating));
}
//holder.imgrecipe.setImage(url,getResources().getDrawable(R.drawable.cusine));
if (holder.imgrecipe != null) {
if (url != null && url.trim().length() > 0) {
//final ProgressBar pbar = holder.pbar;
final ImageView imageView = holder.imgrecipe;
//final RelativeLayout imgRL = holder.imageRL;
ImageLoader.getInstance().displayImage(url, holder.imgrecipe, options, new SimpleImageLoadingListener() {
#Override
public void onLoadingComplete(String imageUri,
View view, Bitmap loadedImage) {
super.onLoadingComplete(imageUri, view, loadedImage);
imageView.setAdjustViewBounds(true);
}
#Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
super.onLoadingFailed(imageUri, view, failReason);
}
#Override
public void onLoadingStarted(String imageUri, View view) {
super.onLoadingStarted(imageUri, view);
}
});
} else {
}
}
return convertView;
}
class ViewHolder {
TextView txttile, txtduration;
ImageView imgrecipe;
ImageView fav_unfav;
RatingBar ratingbar;
}
}
public class getrecipe extends AsyncTask<String, Void, String> {
boolean response = false;
#Override
protected void onPreExecute() {
//progress = ProgressDialog.show(context, "Getting Data...","Please wait....");
progress = new ProgressDialog(getActivity());
progress.setMessage("Please wait....");
progress.show();
}
#Override
protected String doInBackground(String... params) {
response = APIManager.getrecipebycusine(DataManager.CUISINE_ID);
return "";
}
#Override
protected void onPostExecute(String result) {
progress.cancel();
if (response) {
if (DataManager.status.equalsIgnoreCase("1")) {
recipelist = DataManager.recipelist;
adapter.notifyDataSetChanged();
//Intent i = new Intent(getActivity(),RecipeListActvity.class);
//startActivity(i);
} else {
connectionerror();
}
} else {
connectionerror();
}
}
#Override
protected void onProgressUpdate(Void... values) {
}
}
public void alert() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity());
alertDialog.setTitle("No Recipe!");
alertDialog.setMessage("No Recipe for this Cusine");
alertDialog.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
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);
}
}
}
}
public void connectionerror() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity());
alertDialog.setTitle("Error!");
alertDialog.setMessage("Connection Lost ! Try Again");
alertDialog.setPositiveButton("Retry",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
new getrecipe().execute();
}
});
alertDialog.show();
}}
The errors that are showing in Crashlytics is:
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources$Theme android.content.Context.getTheme()' on a null object reference
at android.app.AlertDialog.resolveDialogTheme(AlertDialog.java:154)
at android.app.AlertDialog$Builder.<init>(AlertDialog.java:379)
at com.raccoonfinger.salad.RecipeListFragment.connectionerror(RecipeListFragment.java:381)
at com.raccoonfinger.salad.RecipeListFragment$getrecipe.onPostExecute(RecipeListFragment.java:335)
at com.raccoonfinger.salad.RecipeListFragment$getrecipe.onPostExecute(RecipeListFragment.java:296)
at android.os.AsyncTask.finish(AsyncTask.java:632)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Method.java)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)

Please do not use getActivity() directly in Fragment because sometimes it returns null..
Always pass activity as a parameter in constructor..!!
Please use below method to create your Fragment and use activity reference instead of getActivity()..
public static AboutFragment newInstance(Activity activity) {
AboutFragment aboutFragment = new AboutFragment();
aboutFragment.mActivity = activity;
return aboutFragment;
}
Hope it will help.
Thanks ..!!

ListView not displaying data in fragment

I am using listview to populate data coming from the server. This listview will show that data in a fragmentTab. Now the data is parsing fine and logcat is also showing the data. But the data is not being populated by listview. I tried to see the error through debugging but there is no problem. Even the Holder in adapter catches the data but it's not displayed. I don't know what the problem is. I tried the following questions but didn't got the answer.
Android - ListView in Fragment does not showing up
Android - ListView in Fragment does not show
ListView in Fragment Not Displayed
Below is my fragment and the adapter.
Tastemaker Fragment:
public class TasteMakersFragment extends Fragment
{
CommonClass commonTasteMakers;
String tasteMaker_url = CommonClass.url+ URLConstants.Host.URL_ALL_SUGGESTED_TASTEMAKERS;
String user_token = "8aa0dcd5aaf54c8a5aaef1aa242f342f";
ListView suggested_list;
List<SuggestedUserModel> suggestedUsers_list = new ArrayList<>();
SuggestedUsersAdapter mAdapter;
int selectedPosition = 0;
public TasteMakersFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View v = inflater.from(getActivity()).inflate(R.layout.suggested_users_tastemakers, null);
commonTasteMakers = new CommonClass(getActivity().getApplicationContext());
suggested_list = (ListView)v.findViewById(R.id.lst_suggestedUsers);
new GetSuggestedUsers().execute(tasteMaker_url);
return v;
}
#Override
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
}
private class GetSuggestedUsers extends AsyncTask< String, Void, Void>
{
private ProgressDialog Dialog = new ProgressDialog(getActivity());
protected void onPreExecute() {
if (suggestedUsers_list.isEmpty())
{
Dialog = ProgressDialog.show(getActivity(),"Please be patient!","Fetching for first time...");
}
}
#Override
protected Void doInBackground(String... params)
{
if (suggestedUsers_list.isEmpty())
{
getSuggestedUsers();
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
else{
Log.d("---- Already Fetched --", "---- Already Fetched ----");
return null;
}
}
protected void onPostExecute(Void unused)
{
Dialog.dismiss();
mAdapter = new SuggestedUsersAdapter(getActivity(), suggestedUsers_list);
suggested_list.setAdapter(mAdapter);
suggested_list.setSelection(selectedPosition);
mAdapter.notifyDataSetChanged();
//startMainActivity();
}
}
private List<SuggestedUserModel> getSuggestedUsers()
{
StringRequest postRequest = new StringRequest(Request.Method.POST, tasteMaker_url, new Response.Listener<String>()
{
#Override
public void onResponse(String response)
{
try {
//JSONObject jsonResponse = new JSONObject(response).getJSONObject("form");
JSONObject jsonResponse = new JSONObject(response);
if (jsonResponse.has("data"))
{
JSONObject data = jsonResponse.getJSONObject("data");
String code = jsonResponse.getString("code");
if(code.equals("200"))
{
if(data.has("tasteMakers"))
{
JSONArray tastemakers = data.getJSONArray("tasteMakers");
for (int i =0; i<tastemakers.length(); i++)
{
JSONObject jsnObj = tastemakers.getJSONObject(i);
String id = jsnObj.getString("userId");
String name = jsnObj.getString("name");
String profilePic = jsnObj.getString("imgUrl");
Boolean isFollowed = jsnObj.getBoolean("isFollowed");
suggestedUsers_list.add(new SuggestedUserModel(id,
name,
profilePic,
isFollowed));
Log.d("Names are ----", "size is=" + name +" and their id are: "+id);
}
// Log.d("Adapter list ----", "size is=" + suggestedUsers_list.size());
}
}
else {
Log.d("Error0 Error Error", "response------:" + jsonResponse);
}
}
// Log.d("response222---------","response22222------:"+jsonResponse);
} catch (JSONException e) {
Log.d("-----Stop------", "!!!");
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
}
) {
#Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<>();
// the POST parameters:
params.put("sessionToken", user_token);
return params;
} };
postRequest.setRetryPolicy(new DefaultRetryPolicy(20000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
Volley.newRequestQueue(getActivity().getApplicationContext()).add(postRequest);
return suggestedUsers_list;
}
}
Adapter Class:
public class SuggestedUsersAdapter extends BaseAdapter {
Context context;
int count = 1;
private List<SuggestedUserModel> allUsers;
public SuggestedUsersAdapter(FragmentActivity activity, List<SuggestedUserModel> suggestUserModel)
{
Log.d("Custom Adapter called", "" + suggestUserModel.size());
context = activity;
allUsers = suggestUserModel;
//FragmentActivity mActivity = activity;
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return allUsers.size();
// return imageId.length;
}
#Override
public Object getItem(int position) {
return allUsers.get(position);
// return position;
}
#Override
public long getItemId(int position) {
return position;
}
#SuppressLint({"ViewHolder", "InflateParams", "CutPasteId"})
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final mHolder holder;
// int type = getItemViewType(position);
LayoutInflater layoutInflater;
getItemViewType(position);
if (convertView == null)
{
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.suggested_users_tastemaker_cell, null);
holder = new mHolder();
// convertView.setTag(mFeedsListItemViewHolder);
holder.txt_suggestUserName = (TextView) convertView.findViewById(R.id.tv_tasteMakerName);
holder.imgV_userProfile = (ImageView) convertView.findViewById(R.id.imgBtn_tasteMaker_pic);
holder.btnFollow = (Button) convertView.findViewById(R.id.btnFollow_tasteMaker);
holder.btnFollowing = (Button) convertView.findViewById(R.id.btnFollowing);
convertView.setTag(holder);
} else {
holder = (mHolder) convertView.getTag();
}
final SuggestedUserModel suggestUser = allUsers.get(position);
holder.txt_suggestUserName.setText(allUsers.get(position).getSuggested_UserName());
/*if(suggestUser.getSuggested_UserImage().equals(""))
{
Picasso
.with(context)
.load(R.mipmap.ic_launcher)
.transform(new CropSquareTransformationHomePage())
.into(holder.imgV_userProfile);
}
else {
Picasso
.with(context)
.load(suggestUser.getSuggested_UserImage())
.transform(new CropSquareTransformationHomePage())
.into(holder.imgV_userProfile);
}*/
holder.pos = position;
//mFeedsListItemViewHolder.setData(allPersons.get(position));
return convertView;
}
private class mHolder {
TextView txt_suggestUserName;
ImageView imgV_userProfile;
Button btnFollow;
Button btnFollowing;
int pos;
}
}
Note: I already tried declaring listview and assigning adapter in onActivityCreated() method of fragment but no effect.
Any Help will be appreciated.

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.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Android:Receive Array of Objects and display in listView - android

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