Develop Reference

Search filter on listview returns wrong position on item click

I have listview and after filtering items of listview when I click on item its always returning wrong position of listview item.
Following is Adapter Class:
public class AdmitPatientAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, String>> data;
ArrayList<HashMap<String, String>> TempArrList = new ArrayList<>();
private static LayoutInflater inflater = null;
public static final String TAG_MRDNO = "mrd_no";
public AdmitPatientAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data = d;
TempArrList.addAll(d);
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return TempArrList.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
TempArrList.clear();
if (charText.length() == 0) {
TempArrList.addAll(data);
} else {
HashMap<String, String> tMap;
for (int i = 0; i < data.size(); i++) {
tMap = data.get(i);
if (charText.length() != 0 && tMap.get("mrd_no").toLowerCase(Locale.getDefault()).contains(charText)) {//mrd_no
TempArrList.add(tMap);
} else if (charText.length() != 0 && tMap.get("pname").toLowerCase(Locale.getDefault()).contains(charText)) {//pname
TempArrList.add(tMap);
} else if (charText.length() != 0 && tMap.get("bed_no").toLowerCase(Locale.getDefault()).contains(charText)) {
TempArrList.add(tMap);
} else if (charText.length() != 0 && tMap.get("nursingstation").toLowerCase(Locale.getDefault()).contains(charText)) {
TempArrList.add(tMap);
}
}
notifyDataSetChanged();
}
}
public View getView(int position, View convertView, ViewGroup parent) {
View viw = convertView;
if (convertView == null)
viw = inflater.inflate(R.layout.ip_ptn_items, null);
TextView txt_Mr_dno = (TextView) viw.findViewById(R.id.txtMrdno);
TextView txt_pitnt_Name = (TextView) viw.findViewById(R.id.txtpitntName);
TextView txt_Bed_no = (TextView) viw.findViewById(R.id.txtBedno);
TextView txt_Dob = (TextView) viw.findViewById(R.id.txtDob);
TextView txt_drNme = (TextView) viw.findViewById(R.id.txtDr);
TextView txt_Sex = (TextView) viw.findViewById(R.id.txtSex);
TextView txt_Wrdnm = (TextView) viw.findViewById(R.id.txtWrdnm);
HashMap<String, String> item = new HashMap<String, String>();
item = TempArrList.get(position);
String mrd_no = item.get(TAG_MRDNO);
item.put(TAG_MRDNO, mrd_no);
mrd_no = item.get(TAG_MRDNO);
if (mrd_no.endsWith("*")) {
txt_Mr_dno.setTextColor(Color.RED);
txt_pitnt_Name.setTextColor(Color.RED);
txt_Dob.setTextColor(Color.RED);
txt_Sex.setTextColor(Color.RED);
txt_Wrdnm.setTextColor(Color.RED);
txt_Bed_no.setTextColor(Color.RED);
} else {
txt_Mr_dno.setTextColor(Color.BLACK);
txt_pitnt_Name.setTextColor(Color.BLACK);
txt_Dob.setTextColor(Color.BLACK);
txt_Sex.setTextColor(Color.BLACK);
txt_Wrdnm.setTextColor(Color.BLUE);
txt_Bed_no.setTextColor(Color.BLUE);
}
//Setting all values in listview
txt_Mr_dno.setText(item.get("mrd_no"));
txt_pitnt_Name.setText(item.get("pname"));
txt_Bed_no.setText(item.get("bed_no"));
txt_Dob.setText(item.get("dob"));
//txt_admit_Date.setText(item.get("admission_date"));
txt_Sex.setText(item.get("sex"));
txt_Wrdnm.setText(item.get("nursingstation"));
txt_drNme.setText(item.get("doctor"));
// item = data.get(position);
/// String userType = item.get(TAG_UTYPE);
// item.put(TAG_UTYPE, mrd_no);
// userType = item.get(TAG_UTYPE);
try {
if (item.get("userType").equals("doctor")) {
txt_drNme.setVisibility(View.INVISIBLE);
} else {
txt_drNme.setVisibility(View.VISIBLE);
}
} catch (Exception e) {
e.printStackTrace();
}
return viw;
}
}
and another one is on click event class:
public class AdmitPatientFragment extends Fragment implements FragmentCycle {
ListView lstViw;
AdmitPatientAdapter adapter;
String DcId = "";
String userType = "";
public static final String MyPREFERENCES = "MyPrefs";
SharedPreferences sharedPreferences;
// generic array list
ArrayList<HashMap<String, String>> dlst = new ArrayList<HashMap<String, String>>();
// json url
private static String url = "http://scanweb.dmhospital.org:81/amrita_login/AdmList.php?auth=Yes";
#Override
public void onResumeFragment() {
}
#Override
public void onPauseFragment() {
}
// json node names
private static final String TAG_ADMITLIST = "AdmissionList";
private static final String TAG_MRD = "mrd_no";
private static final String TAG_PNAME = "pname";
private static final String TAG_BNO = "bed_no";
private static final String TAG_DOB = "dob";
private static final String TAG_ADMIT_DATE = "admission_date";
private static final String TAG_DOCTOR = "doctor";
private static String TAG_SEX = "sex";
private static String TAG_PATN_ID = "patient_id";
private static String TAG_VISIT_ID = "visit_id";
private static final String TAG_WARD_NAME = "nursingstation";
public static final String TAG_UTYPE = "userType";
JSONArray AdmissionList = null;
public AdmitPatientFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
setReturnTransition(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
LinearLayout rootView = (LinearLayout) inflater.inflate(
R.layout.ip_ptn_lstviw, container, false);
dlst = new ArrayList<HashMap<String, String>>();
Intent intent = getActivity().getIntent();
DcId = intent.getStringExtra("drid");
if (CheckNetwork.isInternetAvailable(getActivity())) //returns true if internet available
{
} else {
Toast.makeText(getActivity(), "No Internet Connection", Toast.LENGTH_SHORT).show();
}
// to read doctor id from shared preferences
sharedPreferences = getActivity().getSharedPreferences(MyPREFERENCES,
Context.MODE_PRIVATE);
DcId = sharedPreferences.getString("drid", DcId);
userType = sharedPreferences.getString("usertype", userType);
url = url + "&docID=" + DcId;
new paAsyncTask().execute();
return rootView;
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.three_dots_menu, menu);
super.onCreateOptionsMenu(menu, inflater);
final MenuItem searchItem = menu.findItem(R.id.action_search);
SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
//*** setOnQueryTextFocusChangeListener ***
searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
}
});
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String searchQuery) {
adapter.filter(searchQuery.toString().trim());
lstViw.invalidate();
return true;
}
});
MenuItemCompat.setOnActionExpandListener(searchItem, new MenuItemCompat.OnActionExpandListener() {
#Override
public boolean onMenuItemActionCollapse(MenuItem item) {
// Do something when collapsed
return true; // Return true to collapse action view
}
#Override
public boolean onMenuItemActionExpand(MenuItem item) {
// Do something when expanded
return true; // Return true to expand action view
}
});
}
private class paAsyncTask extends AsyncTask<String, String, JSONObject> {
ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
try {
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Please wait admit patient list is loading ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
protected JSONObject doInBackground(String... params) {
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
pDialog.dismiss();
try {
// Getting JSON Array from URL
AdmissionList = json.getJSONArray(TAG_ADMITLIST);
dlst = new ArrayList<HashMap<String, String>>();
for (int i = 0; i < AdmissionList.length(); i++) {
JSONObject c = AdmissionList.getJSONObject(i);
String admission_date = c.getString(TAG_ADMIT_DATE);
HashMap<String, String> map = new HashMap<String, String>();
String ageSex = "(" + c.getString(TAG_DOB) + " | " + c.getString(TAG_SEX) + ")";
String[] admDte = admission_date.split(":");
String[] admDte1 = admission_date.split(":");
String resultDte = admDte[0] + ":" + admDte1[1];
map.put(TAG_MRD, c.getString(TAG_MRD).toString());
map.put(TAG_PNAME, c.getString(TAG_PNAME));
map.put(TAG_BNO, c.getString(TAG_BNO));
map.put(TAG_DOB, ageSex);
map.put(TAG_ADMIT_DATE, resultDte);
map.put(TAG_UTYPE, userType);
map.put(TAG_DOCTOR, c.getString(TAG_DOCTOR).toString());
// map.put(TAG_SEX, str);
map.put(TAG_WARD_NAME, c.getString(TAG_WARD_NAME));
map.put(TAG_PATN_ID, c.getString(TAG_PATN_ID));
map.put(TAG_VISIT_ID, c.getString(TAG_VISIT_ID));
dlst.add(map);
}
lstViw = (ListView) getView().findViewById(R.id.lstAdmsion);
adapter = new AdmitPatientAdapter(getActivity(), dlst);
adapter.notifyDataSetChanged();
lstViw.setAdapter(adapter);
lstViw.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent,
View view, int position, long id) {
HashMap<String, String> map = dlst.get(position);
Intent imp = new Intent(getActivity(),
NavigationDrawerActivity.class);
imp.putExtra("drid", DcId);
// imp.putExtra(TAG_ADMIT_DATE, map.get(""));
imp.putExtra("docNme", map.get(TAG_DOCTOR));
imp.putExtra("ptnId", map.get(TAG_PATN_ID));
imp.putExtra("vst_id", map.get(TAG_VISIT_ID));
startActivity(imp);
}
});
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}

Try changing
HashMap<String, String> map = dlst.get(position);
to
HashMap<String, String> map = adapter.getItem(position);
Basically, the OnItemClickListener is grabbing objects from your ListView rather than your Adapter that has updated references...
EDIT 1: You also need to implement getItem in your Adapter so it returns an object from your filtered list. I'm assuming that's dlst...
So, you would need to put this in your adapter class:
public HashMap<String, String> getItem(int position){
return dlst.get(position);
}

How to set listview row clickable only one time in android?

Explanation:
I have a listview in my fragment. When I click one of the row of the listview it goes to another activity.In listview,I got the data from the adapter.
Inside the adapter view,I set the setOnClick().
Problem is when I click one of the row multiple time it is opening multiple activity.I want to restrict only one time click on the particular row over the listview item.
Here is my fragment where I get the listview and set the adapter-
public class HomeFragment extends Fragment{
public HomeFragment() {
}
public static String key_updated = "updated", key_description = "description", key_title = "title", key_link = "link", key_url = "url", key_name = "name", key_description_text = "description_text";
private static String url = "";
List<String> lst_key = null;
List<JSONObject> arr_completed = null;
List<String> lst_key2 = null;
List<JSONObject> lst_obj = null;
List<String> list_status = null;
ListView completed_listview;
int PagerLength = 0,exeption_flag=0;
View rootView;
private ViewPager pagerRecentMatches;
private ImageView imgOneSliderRecent;
private ImageView imgTwoSliderRecent;
private ImageView imgThreeSliderRecent;
private ImageView imgFourSliderRecent;
private ImageView imgFiveSliderRecent;
private ImageView imgSixSliderRecent;
private ImageView imgSevenSliderRecent;
private ImageView imgEightSliderRecent;
LinearLayout selector_dynamic;
LinearLayout Recent_header_layout;
FrameLayout adbar;
String access_token = "";
SharedPreferences sharedPreferences;
int current_pos=0,status_flag=0;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(false);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_home, container, false);
findViews();
selector_dynamic = (LinearLayout) rootView.findViewById(R.id.selectors_dynamic);
adbar = (FrameLayout) rootView.findViewById(R.id.adbar);
new AddLoader(getContext()).LoadAds(adbar);
MainActivity activity = (MainActivity) getActivity();
access_token = activity.getMyData();
sharedPreferences = getContext().getSharedPreferences("HomePref", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
if (access_token == null || access_token=="") {
url = "https://api.litzscore.com/rest/v2/recent_matches/?access_token=" + sharedPreferences.getString("access_token", null) + "&card_type=summary_card";
} else {
editor.putString("access_token", access_token);
editor.commit();
url = "https://api.litzscore.com/rest/v2/recent_matches/?access_token=" + access_token + "&card_type=summary_card";
}
completed_listview = (ListView) rootView.findViewById(R.id.completed_listview);
Recent_header_layout = (LinearLayout) rootView.findViewById(R.id.Recent_header_layout);
Recent_header_layout.setVisibility(View.GONE);
if(!Utils.isNetworkConnected(getContext())){
dialog_popup();
}
else{
new TabJson().execute();
}
pagerRecentMatches.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
return false;
}
});
return rootView;
}
#Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
private void dialog_popup() {
final Dialog dialog = new Dialog(getContext());
DisplayMetrics metrics = getResources()
.getDisplayMetrics();
int screenWidth = (int) (metrics.widthPixels * 0.90);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.internet_alert_box);
dialog.getWindow().setLayout(screenWidth, WindowManager.LayoutParams.WRAP_CONTENT);
dialog.setCancelable(true);
Button btnNo = (Button) dialog.findViewById(R.id.btn_no);
Button btnYes = (Button) dialog.findViewById(R.id.btn_yes);
btnNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
getActivity().finish();
}
});
dialog.show();
btnYes.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(!Utils.isNetworkConnected(getContext())){
dialog_popup();
}
else{
dialog.dismiss();
new TabJson().execute();
}
}
});
dialog.show();
}
public class TabJson extends AsyncTask<String, String, String> {
String jsonStr = "";
#Override
protected void onPreExecute() {
Utils.Pdialog(getContext());
}
#Override
protected String doInBackground(String... params) {
jsonStr = new CallAPI().GetResponseGetMethod(url);
exeption_flag=0;
status_flag = 0;
if (jsonStr != null) {
try {
if (jsonStr.equals("IO") || jsonStr.equals("MalFormed") || jsonStr.equals("NotResponse")) {
exeption_flag = 1;
} else {
JSONObject obj = new JSONObject(jsonStr);
if (obj.has("status") && !obj.isNull("status")) {
if (obj.getString("status").equals("false") || obj.getString("status").equals("403")) {
status_flag = 1;
} else {
JSONObject data = obj.getJSONObject("data");
JSONArray card = data.getJSONArray("cards");
PagerLength = 0;
lst_obj = new ArrayList<>();
list_status = new ArrayList<>();
lst_key = new ArrayList<>();
lst_key2 = new ArrayList<>();
arr_completed = new ArrayList<>();
for (int i = 0; i < card.length(); i++) {
JSONObject card_obj = card.getJSONObject(i);
if (card_obj.getString("status").equals("started")) {
PagerLength++;
lst_obj.add(card_obj);
list_status.add(card_obj.getString("status"));
lst_key.add(card_obj.getString("key"));
}
if (card_obj.getString("status").equals("notstarted")) {
PagerLength++;
lst_obj.add(card_obj);
list_status.add(card_obj.getString("status"));
lst_key.add(card_obj.getString("key"));
}
if (card_obj.getString("status").equals("completed")) {
arr_completed.add(card_obj);
lst_key2.add(card_obj.getString("key"));
}
}
}
}
}
}
catch(JSONException e){
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Utils.Pdialog_dismiss();
if (status_flag == 1 || exeption_flag==1) {
dialog_popup();
} else {
Recent_header_layout.setVisibility(View.VISIBLE);
LiveAdapter adapterTabRecent = new LiveAdapter(getContext(), lst_obj, PagerLength, list_status, lst_key);
adapterTabRecent.notifyDataSetChanged();
pagerRecentMatches.setAdapter(adapterTabRecent);
pagerRecentMatches.setCurrentItem(current_pos);
ScheduleAdapter CmAdapter = new ScheduleAdapter(getContext(), arr_completed, lst_key2);
CmAdapter.notifyDataSetChanged();
completed_listview.setAdapter(CmAdapter);
}
}
}
private void findViews() {
pagerRecentMatches = (ViewPager) rootView
.findViewById(R.id.pager_recent_matches);
imgOneSliderRecent = (ImageView) rootView
.findViewById(R.id.img_one_slider_recent);
imgTwoSliderRecent = (ImageView) rootView
.findViewById(R.id.img_two_slider_recent);
imgThreeSliderRecent = (ImageView) rootView
.findViewById(R.id.img_three_slider_recent);
imgFourSliderRecent=(ImageView)rootView.findViewById(R.id.img_four_slider_recent);
imgFiveSliderRecent=(ImageView)rootView.findViewById(R.id.img_five_slider_recent);
imgSixSliderRecent=(ImageView)rootView.findViewById(R.id.img_six_slider_recent);
imgSevenSliderRecent = (ImageView) rootView.findViewById(R.id.img_seven_slider_recent);
imgEightSliderRecent = (ImageView) rootView.findViewById(R.id.img_eight_slider_recent);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onDetach() {
super.onDetach();
}
}
After load the data from the server it passed to the onPost() i called an adapter which extends BaseAdpter
Here is my BaseAdapter
package adapter;
public class ScheduleAdapter extends BaseAdapter{
private Context context;
private List<JSONObject> arr_schedule;
private List<String> arr_matchKey;
private static LayoutInflater inflater;
int flag = 0;
String time="";
String status="";
String match_title = "";
String match_key="";
public ScheduleAdapter(Context context,List<JSONObject> arr_schedule,List<String> arr_matchKey){
this.context=context;
this.arr_schedule=arr_schedule;
this.arr_matchKey=arr_matchKey;
inflater=(LayoutInflater)this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return this.arr_schedule.size();
}
#Override
public Object getItem(int position) {
return this.arr_schedule.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
private class Holder{
TextView txt_one_country_name;
TextView txt_two_country_name;
TextView txt_venue;
TextView txtTimeGMT;
TextView txtDate;
TextView txtTimeIST;
ImageView team_one_flag_icon;
ImageView team_two_flag_icon;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
Holder holder=new Holder();
String[] parts;
String[] state_parts;
String[] match_parts;
Typeface tf=null;
String winner_team = "";
String final_Score="";
String now_bat_team="",team_name="";
String related_status="";
if(convertView==null) {
convertView = inflater.inflate(R.layout.recent_home_layout, null);
holder.txt_one_country_name = (TextView) convertView.findViewById(R.id.txt_one_country_name);
holder.txt_two_country_name = (TextView) convertView.findViewById(R.id.txt_two_country_name);
holder.txt_venue = (TextView) convertView.findViewById(R.id.venue);
holder.txtTimeIST = (TextView) convertView.findViewById(R.id.txt_timeist);
holder.txtTimeGMT = (TextView) convertView.findViewById(R.id.txt_timegmt);
holder.txtDate = (TextView) convertView.findViewById(R.id.txt_date);
holder.team_one_flag_icon = (ImageView) convertView.findViewById(R.id.team_one_flag_icon);
holder.team_two_flag_icon = (ImageView) convertView.findViewById(R.id.team_two_flag_icon);
tf = Typeface.createFromAsset(convertView.getResources().getAssets(), "Roboto-Regular.ttf");
holder.txt_one_country_name.setTypeface(tf);
holder.txt_two_country_name.setTypeface(tf);
holder.txt_venue.setTypeface(tf);
holder.txtTimeIST.setTypeface(tf);
holder.txtTimeGMT.setTypeface(tf);
holder.txtDate.setTypeface(tf);
convertView.setTag(holder);
}
else{
holder=(Holder)convertView.getTag();
}
try {
String overs="";
String wickets_now="";
String now_runs="";
String[] over_parts;
time = "";
JSONObject mainObj = this.arr_schedule.get(position);
status = mainObj.getString("status");
String name = mainObj.getString("short_name");
String state = mainObj.getString("venue");
String title = mainObj.getString("title");
related_status=mainObj.getString("related_name");
JSONObject start_date = mainObj.getJSONObject("start_date");
JSONObject teams=null;
JSONObject team_a=null;
JSONObject team_b=null;
String team_a_key="";
String team_b_key="";
time = start_date.getString("iso");
parts = name.split("vs");
match_parts = title.split("-");
state_parts = state.split(",");
int length = state_parts.length;
flag=0;
match_title="";
winner_team="";
if (!mainObj.isNull("msgs")) {
JSONObject msgs = mainObj.getJSONObject("msgs");
winner_team = "";
if (msgs.has("info")) {
winner_team = msgs.getString("info");
flag = 1;
}
}
match_title=name+" - "+match_parts[1];
JSONObject now=null;
if(mainObj.has("now") && !mainObj.isNull("now")) {
now = mainObj.getJSONObject("now");
if (now.has("batting_team")) {
now_bat_team = now.getString("batting_team");
}
if (now.has("runs")) {
if (now.getString("runs").equals("0")) {
now_runs = "0";
} else {
now_runs = now.getString("runs");
}
}
if (now.has("runs_str") && !now.isNull("runs_str")) {
if (now.getString("runs_str").equals("0")) {
overs = "0";
} else {
if(now.getString("runs_str").equals("null")){
overs="0";
}
else{
over_parts=now.getString("runs_str").split(" ");
overs=over_parts[2];
}
}
}
if (now.has("wicket")) {
if (now.getString("wicket").equals("0")) {
wickets_now = "0";
} else {
wickets_now = now.getString("wicket");
}
}
}
try {
if (!mainObj.isNull("teams") && mainObj.has("teams")) {
teams = mainObj.getJSONObject("teams");
team_a = teams.getJSONObject("a");
team_b = teams.getJSONObject("b");
team_a_key = team_a.getString("key");
team_b_key = team_b.getString("key");
JSONArray team_arr = teams.names();
JSONObject team_obj;
for (int a = 0; a < team_arr.length(); a++) {
if (now_bat_team.equals(team_arr.getString(a))) {
team_obj = teams.getJSONObject(team_arr.getString(a));
if (team_obj.has("short_name") && !team_obj.isNull("short_name")) {
team_name = team_obj.getString("short_name");
}
}
}
}
}
catch (NullPointerException e){
e.printStackTrace();
}
if(mainObj.has("status_overview") && !mainObj.isNull("status_overview")){
if(mainObj.getString("status_overview").equals("abandoned") || mainObj.getString("status_overview").equals("canceled")){
final_Score="";
}
else{
final_Score=team_name+" - "+now_runs+"/"+wickets_now+" ("+overs+" ovr)";
}
}
holder.txt_one_country_name.setText(parts[0]);
holder.txt_two_country_name.setText(parts[1]);
if(length==1){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP, 13);
holder.txtTimeGMT.setText(state_parts[0]);
}
if(length==2){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
holder.txtTimeGMT.setText(state_parts[0] + "," + state_parts[1]);
}
if(length==3){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP,12);
holder.txtTimeGMT.setText(state_parts[1] + "," + state_parts[2]);
}
if(length==4){
holder.txtTimeGMT.setTextSize(TypedValue.COMPLEX_UNIT_SP,12);
holder.txtTimeGMT.setText(state_parts[2] + "," + state_parts[3]);
}
holder.txtDate.setText(final_Score);
holder.txtDate.setTypeface(tf, Typeface.BOLD);
holder.txtDate.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
holder.txtTimeIST.setText(winner_team);
holder.txt_venue.setText(related_status);
} catch (JSONException e) {
e.printStackTrace();
}
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
match_key = arr_matchKey.get(position);
MainActivity activity = (MainActivity) context;
GetValue gv = new GetValue(context);
gv.setFullUrl(match_key);
gv.setAccessToken(activity.getMyData());
gv.execute();
}
});
return convertView;
}
#Override
public boolean isEnabled(int position) {
return super.isEnabled(position);
}
}
This adapter set the listrow item into listview.
In ScheduleAdapter.java i set the onclick() on the convertView in which i called a GetValue class which is only implement a Asynctask to get the data and called and intent then it goes to an activity.
Means HomeFragment->ScheduleAdapter->GetValue->Scorecard
Here,
HomeFragment is fragment which have listview
ScheduleAdpter is an adapter which set data to listview which reside in homefragment
GetValue is class which implement some important task and it passed an intent and goes to an activity(It's work as a background)
ScoreCard is my activity which called after click on the row of the listview which reside in HomeFragment.
Please, help me to solve out this problem.

You can use a flag in Listview click - isListClicked, and set flag value as false in onPostexecute method of Aysnc task class -GetValue
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(!isListClicked){
match_key = arr_matchKey.get(position);
MainActivity activity = (MainActivity) context;
GetValue gv = new GetValue(context);
gv.setFullUrl(match_key);
gv.setAccessToken(activity.getMyData());
gv.execute();
isListClicked = true;
}
}
});

If you want to prevent multiple activities being opened when the user spams with touches, add into your onClick event the removal of that onClickListener so that the listener won't exist after the first press.

Easy way is you can create a model class of your json object with those field you taken in holder class. And add one more boolean field isClickable with by default with true value.Now when user press a row for the first time you can set your model class field isClickable to false. Now second time when user press a row,you will get a position of row and you can check for isClickable. it will return false this time.
Model Class :
public class CountryInfoModel {
//other fields to parse json object
private boolean isClickable; //<- add one more extra field
public boolean isClickable() {
return isClickable;
}
public void setIsClickable(boolean isClickable) {
this.isClickable = isClickable;
}
}
listview click perform :
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//country_list is your list of model class List<CountryInfo>
if(country_list.get(position).isClickable())
{
//Perform your logic
country_list.get(position).setIsClickable(false);
}else{
//Do nothing : 2nd time click
}
}
});

Try creating your custom click listener for your listview and use it. In this way
public abstract class OnListItemClickListener implements OnItemClickListener {
private static final long MIN_CLICK_INTERVAL=600;
private long mLastClickTime;
public abstract void onListItemSingleClick(View parent, View view, int position, long id);
public OnListItemClickListener() {
// TODO Auto-generated constructor stub
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
long currentClickTime=SystemClock.uptimeMillis();
long elapsedTime=currentClickTime-mLastClickTime;
mLastClickTime=currentClickTime;
if(elapsedTime<=MIN_CLICK_INTERVAL)
return;
onListItemSingleClick(parent, view, position, id);
}
}

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.

ListView shows wrong placement of images taken from URL

My listview doesn't show exact placement of images on its individual custom adapters. I am trying to load the images using AsyncTask. Sometimes the images duplicates and I don't have any idea why. Here is my ArrayAdapter code:
public class NewsPromoAdapter extends ArrayAdapter<NewsPromosDTO> {
private final Context context;
List<NewsPromosDTO> npList;
LayoutInflater inflater;
Bitmap src;
public NewsPromoAdapter(Context context, List<NewsPromosDTO> npList) {
super(context, R.layout.news_and_promos, npList);
this.context = context;
this.npList = npList;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public static class ViewHolder {
TextView nameText;
TextView date1Text;
ImageView imageView;
ProgressBar prg;
LoadImage loadImg;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.news_and_promos, parent,
false);
holder = new ViewHolder();
holder.nameText = (TextView) convertView
.findViewById(R.id.newspromo_name);
holder.date1Text = (TextView) convertView
.findViewById(R.id.newspromo_date);
holder.imageView = (ImageView) convertView
.findViewById(R.id.newspromo_imageView);
holder.prg = (ProgressBar) convertView
.findViewById(R.id.progressBar1);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
holder.loadImg.cancel(true);
}
if (!(npList.get(position).getName().equals(""))) {
holder.nameText.setVisibility(View.VISIBLE);
holder.nameText.setText(npList.get(position).getName());
} else {
holder.nameText.setVisibility(View.GONE);
}
if (!(npList.get(position).getDate().equals(""))) {
holder.date1Text.setVisibility(View.VISIBLE);
holder.date1Text.setText(npList.get(position).getDate());
} else {
holder.date1Text.setVisibility(View.GONE);
}
if (!(npList.get(position).getImageURL().equals(""))) {
holder.imageView.setVisibility(View.VISIBLE);
holder.loadImg = new LoadImage(holder.imageView, npList.get(
position).getImageURL(), holder);
holder.loadImg.execute();
} else {
holder.imageView.setVisibility(View.GONE);
holder.prg.setVisibility(View.GONE);
}
return convertView;
}
class LoadImage extends AsyncTask<Object, Void, Bitmap> {
ViewHolder viewH;
private ImageView imv;
private String url;
public LoadImage(ImageView imv, String imageURL, ViewHolder viewH) {
this.imv = imv;
this.url = imageURL;
this.viewH = viewH;
}
#Override
protected Bitmap doInBackground(Object... params) {
BitmapFromURL bmpURL = new BitmapFromURL();
src = bmpURL.getBitmapFromURL(url);
return src;
}
#Override
protected void onPostExecute(Bitmap result) {
// imv.setImageBitmap(result);
// viewH.prg.setVisibility(View.GONE);
viewH.prg.setVisibility(View.GONE);
imv.setImageBitmap(result);
}
}
}
Here is the Activity that handles the ADAPTER. I am implementing the Endless listview approach that some big sites uses. Like Facebook, Twitter, etc..New Items loaded into the listview when scrolling into the bottom. I am not sure if I did it well.
public class ListNewsPromoActivity extends Activity {
List<NewsPromosDTO> npList;
String url, user_email;
Bundle extras;
int user_points;
List<Integer> npIDs;
private ProgressDialog progressDialog;
BitmapFromURL bmpURL;
JSONArray users = null;
String TAG_ID = "id";
String TAG_NAME = "name";
String TAG_PHOTO = "photo";
String TAG_DATE = "date";
String TAG_DESC = "description";
ListView list;
NewsPromoAdapter newsAdapter;
boolean loadingMore = false;
private Runnable returnRes;
int itemsPerPage = 3;
int currentIndex = 0;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.news_promo_listview);
list = (ListView) findViewById(R.id.mainView);
extras = getIntent().getExtras();
if (extras != null) {
user_points = extras.getInt("user_points");
user_email = extras.getString("user_email");
}
url = getString(R.string.app_url_news_promos);
npIDs = new ArrayList<Integer>();
npList = new ArrayList<NewsPromosDTO>();
View footerView = ((LayoutInflater) this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(
R.layout.footer, null, false);
newsAdapter = new NewsPromoAdapter(ListNewsPromoActivity.this, npList);
list.addFooterView(footerView);
list.setAdapter(newsAdapter);
list.setOnScrollListener(new OnScrollListener() {
// useless here, skip!
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// what is the bottom item that is visible
int lastInScreen = firstVisibleItem + visibleItemCount;
// is the bottom item visible & not loading more already ? Load
if ((lastInScreen == totalItemCount) && !(loadingMore)) {
Thread thread = new Thread(null, getRunnable());
thread.start();
}
}
});
// Runnable to load the items
// Since we cant update our UI from a thread this Runnable takes care of
// that!
returnRes = new Runnable() {
#Override
public void run() {
// Loop thru the new items and add them to the adapter
for (NewsPromosDTO np : npList) {
System.out.println(np.getName() + " andito ako!!");
newsAdapter.add(np);
}
newsAdapter.notifyDataSetChanged();
// Done loading more.
loadingMore = false;
}
};
}
protected class loadNewsPromo extends AsyncTask<Void, Void, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
protected String doInBackground(Void... params) {
// Creating JSON Parser instance
loadingMore = true;
JSONParser jParser = new JSONParser();
JSONObject json;
if (jParser.checkServer(url)) {
try {
// Getting Array of UserNews
json = jParser.getJSONFromUrl(url);
users = json.getJSONArray(user_email);
// looping through All UserNews
for (int i = currentIndex; i < itemsPerPage; i++) {
if (itemsPerPage == i) {
// currentIndex--;
break;
} else {
JSONObject c = users.getJSONObject(i);
// Storing each json item in variable
NewsPromosDTO npDTO = new NewsPromosDTO();
npDTO.setImageURL(c.getString(TAG_PHOTO));
npDTO.setId(c.getInt(TAG_ID));
npDTO.setName(c.getString(TAG_NAME));
npDTO.setDate(c.getString(TAG_DATE));
npDTO.setDescription(c.getString(TAG_DESC));
npList.add(npDTO);
currentIndex++;
}
}
} catch (JSONException e) {
e.printStackTrace();
return null;
} finally {
}
}
}
return null;
}
#Override
protected void onPostExecute(String result) { //
// progressDialog.dismiss();
loadingMore = false;
list();
}
}
public void list() {
// add the footer before adding the adapter, else the footer will not
// load!
View footerView = ((LayoutInflater) this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(
R.layout.footer, null, false);
newsAdapter = new NewsPromoAdapter(ListNewsPromoActivity.this, npList);
list.addFooterView(footerView);
list.setAdapter(newsAdapter);
}
public Runnable getRunnable() {
Runnable loadMoreListItems = new Runnable() {
#Override
public void run() {
// Set flag so we cant load new items 2 at the same time
loadingMore = true;
// Reset the array that holds the new items
// Simulate a delay, delete this on a production environment!
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
// Get 15 new listitems
JSONParser jParser = new JSONParser();
JSONObject json;
npList = new ArrayList<NewsPromosDTO>();
if (jParser.checkServer(url)) {
try {
// Getting Array of Contacts
json = jParser.getJSONFromUrl(url);
users = json.getJSONArray(user_email);
// looping through All Contacts
// if (itemsPerPage > users.length() - currentIndex) {
// itemsPerPage = users.length();
// }
npList = new ArrayList<NewsPromosDTO>();
System.out.println(users.length() + " Laman ng users");
int counter = 0;
for (int i = currentIndex; i < users.length(); i++) {
if (itemsPerPage == counter) {
break;
} else {
JSONObject c = users.getJSONObject(i);
// Storing each json item in variable
NewsPromosDTO npDTO = new NewsPromosDTO();
npDTO.setImageURL(c.getString(TAG_PHOTO));
npDTO.setId(c.getInt(TAG_ID));
npDTO.setName(c.getString(TAG_NAME));
npDTO.setDate(c.getString(TAG_DATE));
npDTO.setDescription(c.getString(TAG_DESC));
npList.add(npDTO);
currentIndex++;
}
counter++;
}
} catch (JSONException e) {
e.printStackTrace();
} finally {
}
}
// Done! now continue on the UI thread
runOnUiThread(returnRes);
}
};
return loadMoreListItems;
}
}