How to get data from adapter and display in listview

How to get data from adapter and display in listview - android

By getting data from server displaying custom list-view. List item is having one button and one textview. Here i'm trying to display another listview with selected listview data.Here selection is done when when user click on button in list item.I'have done upto getting selected data from first Listview and storing it in arraylist.after this how to use this arraylist(Which is present in adapter class) and display a listview below the first listview.How to proceed.Here is my firstlistview adapter class
package com.spatel.slantright.adapter;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;
import com.parse.ParseUser;
import com.parse.SaveCallback;
import com.spatel.slantright.R;
import com.spatel.slantright.model.ManagerModel;
import com.spatel.slantright.model.UserDetials;
public class ManagersAdapter extends BaseAdapter {
Context context;
private List<UserDetials> rowItem = null;
private List<UserDetials> notFollowing = null;
LayoutInflater mInflater, notFollowinflater;
boolean state[] = { true, true, true, true };
public ManagersAdapter(Context context, List<UserDetials> alFollowings) {
this.context = context;
this.rowItem = alFollowings;
this.mInflater = (LayoutInflater) context
.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
}
/* private view holder class */
private class ViewHolder {
ImageView ivBlack;
TextView tvUsername;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final UserDetials row_pos;
row_pos = rowItem.get(position);
ViewHolder holder = null;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.row_managers, null);
holder = new ViewHolder();
holder.ivBlack = (ImageView) convertView.findViewById(R.id.ivBlack);
holder.tvUsername = (TextView) convertView
.findViewById(R.id.tvUsername);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
// setting the image resource and title
//holder.ivBlack.setImageResource(rowItem.get(position).getIcon());
holder.tvUsername.setText(rowItem.get(position).getUserName());
holder.ivBlack.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (state[position]) {
row_pos.setIcon(R.drawable.black_circle);
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
"UserDetails");
query.whereEqualTo("userId", ParseUser.getCurrentUser()
.getObjectId().toString());
query.findInBackground(new FindCallback<ParseObject>() {
#Override
public void done(List<ParseObject> object,
ParseException e) {
ParseObject objects = object.get(0);
if (e == null) {
try {
JSONArray jArray = objects
.getJSONArray("followings");
JSONArray notfollowingJArray = new JSONArray();
final JSONArray followingJArray = new JSONArray();
if (jArray != null && jArray.length() > 0) {
// alFollowings = new
// ArrayList<UserDetials>();
for (int i = 0; i < jArray.length(); i++) {
// Excluding the item at position
System.out
.println("POSITION ::::::::::::::::"
+ position);
if (i != position) {
followingJArray.put(jArray.get(i));
}else {
System.out
.println("RRRRRRRRRRRRRRRRRRRRROOOOOOOOOOOOOOOOOOOOWWWWWWWWWWWWWWW" + rowItem.get(i).getUserName().toString());
followingJArray.put(jArray.get(i));
ArrayList<String> listdata = new ArrayList<String>();
if (jArray != null) {
for (int j=0;j<jArray.length();j++){
listdata.add(jArray.get(j).toString());
}
}
}
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
"UserDetails");
query.whereEqualTo("userId", ParseUser.getCurrentUser()
.getObjectId().toString());
query.findInBackground(new FindCallback<ParseObject>() {
#Override
public void done(List<ParseObject> object,
ParseException e) {
ParseObject objects = object.get(0);
objects.put(
"followings",
followingJArray);
objects
.saveInBackground();
}
});
}
}
} catch (JSONException e1) {
e1.printStackTrace();
}
}
}
});
state[position] = false;
rowItem.remove(position);
notifyDataSetChanged();
} else if (!state[position]) {
row_pos.setIcon(R.drawable.black_circle);
state[position] = true;
notifyDataSetChanged();
}
}
});
return convertView;
}
#Override
public int getCount() {
return rowItem.size();
}
#Override
public Object getItem(int position) {
return rowItem.get(position);
}
#Override
public long getItemId(int position) {
return rowItem.indexOf(getItem(position));
}
}

Related

GetView not called on notifyDataSetChanged, ListView is stuck

I have a problem, I have created custom adapter with custom filtering on Contact object in Contacts app, it filters names of contacts just fine and list of filteredContacts is saved properly. The problem is that when I type anything in searchView, the number of found rows is correct but informations about found rows are not correct. The problem seems to be about getView function in adapter, it is not called when it should. For example if i have three contacts: "abc", "aaa", "aba" and they are shown at the beggining in this order from top to bottom, then if I type "ab" in searchView then it finds 2 rows but they are still the same as at the beggining, they should be "abc" and "aba" but they are "abc" and "aaa". The first ever view created by adapter seems to be stuck for some reason.
My activity class:
package com.example.androidlab;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import androidx.appcompat.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.Toast;
import java.lang.reflect.Type;
import java.util.ArrayList;
public class AllContactsActivity extends AppCompatActivity {
static ArrayList<Contact> contacts = new ArrayList<>();
ContactsAdapter contactsAdapter;
ListView listView;
SearchView searchView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_all_contacts);
FloatingActionButton addContact = findViewById(R.id.newContact);
listView = findViewById(R.id.allContactsList);
searchView = findViewById(R.id.searchContacts);
SharedPreferences sharedPreferences = getApplicationContext().getSharedPreferences("com.tanay.thunderbird.contacts", Context.MODE_PRIVATE);
Gson gson = new Gson();
String json = sharedPreferences.getString("contacts", null);
Type type = new TypeToken<ArrayList<Contact>>() {
}.getType();
contacts = gson.fromJson(json, type);
if (contacts == null) {
contacts = new ArrayList<>();
}
if (contacts.size() == 0)
Toast.makeText(this, "There are no contacts.", Toast.LENGTH_LONG).show();
contactsAdapter = new ContactsAdapter(this, contacts);
listView.setAdapter(contactsAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(getApplicationContext(), EditContactActivity.class);
intent.putExtra("noteID", position);
startActivity(intent);
finish();
}
});
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
contactsAdapter.getFilter().filter(query);
return false;
}
#Override
public boolean onQueryTextChange(String query) {
contactsAdapter.getFilter().filter(query);
return false;
}
});
addContact.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(getApplicationContext(), NewContactActivity.class);
startActivity(intent);
finish();
}
});
}
#Override
public void onBackPressed() {
finish();
}
}
My adapter class:
package com.example.androidlab;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class ContactsAdapter extends BaseAdapter implements Filterable {
Context context;
List<Contact> contacts;
List<Contact> filteredContacts;
ContactFilter mFilter = new ContactFilter();
String filterString;
ContactsAdapter(Context context, List<Contact> contacts) {
this.context = context;
this.contacts = contacts;
filteredContacts = contacts;
}
#Override
public int getCount() {
if(contacts.size() != filteredContacts.size() || filterString != null)
{
return filteredContacts.size();
}
else {
filteredContacts = contacts;
return contacts.size();
}
}
#Override
public Object getItem(int position) {
return contacts.get(position);
}
#Override
public long getItemId(int position) {
return contacts.indexOf(getItem(position));
}
#Override
public Filter getFilter() {
return mFilter;
}
private class ViewHolder {
ImageView imageView;
TextView name;
TextView phoneNumber;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
LayoutInflater mInflater = (LayoutInflater) context.getSystemService(AllContactsActivity.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_contacts, null);
holder = new ViewHolder();
holder.name = (TextView) convertView.findViewById(R.id.contactName);
holder.imageView = (ImageView) convertView.findViewById(R.id.imageOfContact);
holder.phoneNumber = (TextView) convertView.findViewById(R.id.phoneNumber);
Contact contact;
if(filteredContacts.size() != contacts.size()) contact = filteredContacts.get(position);
else contact = contacts.get(position);
if (contact.getAvatar() == null) {
if (contact.getGender() == true)
holder.imageView.setImageResource(R.drawable.ic_man);
else holder.imageView.setImageResource(R.drawable.ic_woman);
} else {
byte[] decodedString = Base64.decode(contact.getAvatar(), Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
holder.imageView.setImageBitmap(decodedByte);
}
holder.name.setText(contact.getName());
holder.phoneNumber.setText(String.valueOf(contact.getPhoneNumber()));
}
return convertView;
}
private class ContactFilter extends Filter {
#Override
protected FilterResults performFiltering(CharSequence constraint) {
filterString = constraint.toString().toLowerCase();
FilterResults results = new FilterResults();
final List<Contact> list = contacts;
int count = list.size();
final ArrayList<Contact> nList = new ArrayList<Contact>();
for (int i = 0; i < count; i++) {
if(contacts.get(i).getName().contains(filterString)) nList.add(contacts.get(i));
}
results.values = nList;
results.count = nList.size();
return results;
}
#SuppressWarnings("unchecked")
#Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredContacts = (ArrayList<Contact>) results.values;
notifyDataSetChanged();
}
}
}
EDIT: I got rid of if(contentView == null) in getView function and everything works fine

The check for convertView == null should only handle the inflation of your View and the creation of a new ViewHolder the rest of you getView code should always run.
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_contacts, null);
// attach a new holder to the inflated view
holder = new ViewHolder();
convertView.setTag(holder);
} else {
// get an existing holder from the existing view
holder = (ViewHolder) convertView.getTag();
}
// update your holder here:
// e.g. holder.name.setText(contact.getName());
return convertView;
}

Listview to display only one item clicked not all of the list

Here is my code of the populated listview adapter that I have
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;
public class ListViewAdapter extends BaseAdapter {
private Activity activity;
private LayoutInflater inflater;
private List<Contact> DataList;
public ListViewAdapter(Activity activity, List<Contact> dataitem) {
this.activity = activity;
this.DataList = dataitem;
}
#Override
public int getCount() {
return DataList.size();
}
#Override
public Object getItem(int location) {
return DataList.get(location);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.list, null);
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView companyName = (TextView) convertView.findViewById(R.id.companyName);
Contact m = DataList.get(position);
name.setText(m.getName());
companyName.setText(String.valueOf(m.getCompanyName()));
return convertView;
}
}
And here is my main
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends Activity {
private static final String url = "https://s3.amazonaws.com/technical-challenge/v3/contacts.json";
private List<Contact> l = new ArrayList<Contact>();
private ListView listView;
private ListViewAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list);
adapter = new ListViewAdapter(this, l);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i = new Intent(MainActivity.this, ContactDetail.class);
startActivity(i);
}
});
JsonArrayRequest jsonreq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Contact dataSet = new Contact();
dataSet.setName(obj.getString("name"));
dataSet.setCompanyName(obj.getString("companyName"));
l.add(dataSet);
} catch (JSONException e) {
e.printStackTrace();
}
}
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
AlertDialog.Builder add = new AlertDialog.Builder(MainActivity.this);
add.setMessage(error.getMessage()).setCancelable(true);
AlertDialog alert = add.create();
alert.setTitle("Error!!!");
alert.show();
}
});
Controller.getInstance(this).addToRequestQueue(jsonreq);
}
}
}
this code works properly and populates my listview, however, when I click on an item in the listview I have another listview populating that displays all contact items...I just want ONE contact item to display.
import android.app.Activity;
import android.content.Context;
import android.net.Uri;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;
public class ListViewContactAdapter extends BaseAdapter {
private Activity activity;
private LayoutInflater inflater;
private List<Contact> DataList;
public ListViewContactAdapter(Activity activity, List<Contact> dataitem) {
this.activity = activity;
this.DataList = dataitem;
}
#Override
public int getCount() {
return DataList.size();
}
#Override
public Object getItem(int location) {
return DataList.get(location);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.contactlistinfo, null);
ImageView i = (ImageView) convertView.findViewById(R.id.imageView2);
TextView tv2 = (TextView) convertView.findViewById(R.id.textView2);
TextView tv4 = (TextView) convertView.findViewById(R.id.textView4);
TextView tv6 = (TextView) convertView.findViewById(R.id.textView6);
TextView tv8 = (TextView) convertView.findViewById(R.id.textView8);
TextView tv17 = (TextView) convertView.findViewById(R.id.textView17);
TextView tv18 = (TextView) convertView.findViewById(R.id.textView18);
TextView tv19 = (TextView) convertView.findViewById(R.id.textView19);
TextView tv20 = (TextView) convertView.findViewById(R.id.textView20);
TextView tv10 = (TextView) convertView.findViewById(R.id.textView10);
TextView tv12 = (TextView) convertView.findViewById(R.id.textView12);
TextView tv14 = (TextView) convertView.findViewById(R.id.textView14);
TextView tv16 = (TextView) convertView.findViewById(R.id.textView16);
Contact m = DataList.get(position);
tv2.setText(m.getName());
tv4.setText(m.getCompanyName());
tv6.setText(m.getHome());
tv12.setText(m.getMobile());
tv14.setText(m.getWork());
tv8.setText(m.getStreet());
tv18.setText(m.getCity());
tv17.setText(m.getState());
tv19.setText(m.getZipCode());
tv20.setText(m.getCountry());
tv10.setText(m.getBirthdate());
tv16.setText(m.getEmail());
i.setImageURI(Uri.parse("https://s3.amazonaws.com/technical-challenge/v3/images/elmer-fudd-small.jpg"));
return convertView;
}
}
Now here is where I have it being populated. But why does it display as another list listview? I want only ONE item.
import android.app.AlertDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListView;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class ContactDetail extends AppCompatActivity {
private static final String url = "https://s3.amazonaws.com/technical-challenge/v3/contacts.json";
private List<Contact> l = new ArrayList<Contact>();
private ListView listView;
private ListViewContactAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_contact_detail);
listView = (ListView) findViewById(R.id.list2);
adapter = new ListViewContactAdapter(this, l);
listView.setAdapter(adapter);
JsonArrayRequest jsonreq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
for (int i = 0; i < response.length(); i++)
try {
JSONObject obj = response.getJSONObject(i);
// Phone
JSONObject phone = obj.getJSONObject("phone");
String home = phone.getString("home");
String mobile = phone.getString("mobile");
String work = phone.getString("work");
//Address
JSONObject address = obj.getJSONObject("address");
String street = address.getString("street");
String city= address.getString("city");
String state= address.getString("state");
String country= address.getString("country");
String zipCode= address.getString("zipCode");
Contact dataSet = new Contact();
dataSet.setName(obj.getString("name"));
dataSet.setCompanyName(obj.getString("companyName"));
dataSet.setBirthdate(obj.getString("birthdate"));
dataSet.setEmail(obj.getString("emailAddress"));
dataSet.setHome(home);
dataSet.setMobile(mobile);
dataSet.setWork(work);
dataSet.setStreet(street);
dataSet.setState(state);
dataSet.setCity(city);
dataSet.setZipCode(zipCode);
dataSet.setCountry(country);
dataSet.setImage(obj.getString("largeImageURL"));
l.add(dataSet);
} catch (JSONException e) {
e.printStackTrace();
}
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
AlertDialog.Builder add = new AlertDialog.Builder(ContactDetail.this);
add.setMessage(error.getMessage()).setCancelable(true);
AlertDialog alert = add.create();
alert.setTitle("Error!!!");
alert.show();
}
});
Controller.getInstance(this).addToRequestQueue(jsonreq);
}
}

I guess your ContactDetail activity is getting the list again. And why do you need to show a listview again if you only need one item upon clicking of one item in your first activity.
Anyway, if you still want to use listview in your ContactDetail then do this..
in your listview.setOnItemClickListener on MainActivity
Intent intent = new Intent(MainActivity.this, ContactDetail.this);
intent.putExtra("contact", l.get(position));
startActivity(intent);
in your ContactDetails activity, replace it with this.. remove that JsonArrayRequest
listView = (ListView) findViewById(R.id.list2);
Contact contact = getIntent().getSerializableExtra("contact");
l.add(contact);
adapter = new ListViewContactAdapter(this, l);
listView.setAdapter(adapter);
and also make sure that your Contact object implements Serializable

Why my listview not refresh when I press back button and come back to activity?

I'm tired already with my code. I'm writing chat application. My app consist of two activity. First activity has a listview of wich each row contain a last message which was send for the user while a second activity contain the whole conversation. In my app I used socket.io for android. My app works fine. Listview is refresh when a data is receive but when I press back button and then come back to the activity a listview not refresh itself already. In logs console I see that a data has received and "changed" method is called but listview is not refresh. What is wrong in belows code?
package com.example.seadog.fb_dialog;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.net.URISyntaxException;
import java.util.ArrayList;
import io.socket.client.IO;
import io.socket.client.Socket;
import io.socket.emitter.Emitter;
public class MainActivity extends Activity {
public static ArrayList arrayList = new ArrayList();
public ListView listView;
public MyBaseAdapter adapter;
public TextView textView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/*
* Get Socket.io Object
*/
SocketIO socketIo = new SocketIO();
Socket mSocket = socketIo.getSocket(); // get socket
Integer id = socketIo.getId(); // get Website ID
if(mSocket == null) {
socketIo.Connection();
mSocket = socketIo.getSocket();
mSocket.on("message", new Emitter.Listener() {
/*
* Message Listener
*/
#Override
public void call(Object... args) {
Boolean isset = false;
try {
JSONObject object = (JSONObject) args[0];
String _id = object.getString("_id");
String message = object.getString("message");
JSONObject obj = new JSONObject();
obj.put("direction", "fb-lt");
obj.put("message", message);
obj.put("date", "2017-05-29T12:15:49.245Z");
for(int i = 0; i < arrayList.size(); i++){
ListData ld = (ListData) arrayList.get(i);
String id = ld.getId();
if(_id.equals(id)){
JSONArray Data = ld.getData();
Data.put(obj);
ld.setDescription(message);
arrayList.set(i, ld);
isset = true;
Log.d("LOG", message);
}
}
if(!isset) {
JSONArray jsonArray = new JSONArray();
jsonArray.put(obj);
ListData ld = new ListData();
ld.set_id(_id);
ld.setID(1);
ld.setTitle("Klient:");
ld.setDescription(message);
ld.setData(jsonArray);
arrayList.add(ld);
}
} catch (JSONException e) {
e.printStackTrace();
}
changed();
}
});
}
/*
* Populate a listview
*/
listView = (ListView) findViewById(R.id.listView);
adapter = new MyBaseAdapter(this, arrayList);
listView.setAdapter(adapter);
/*
* OnItemClickListener
*/
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(MainActivity.this, Conversation.class);
intent.putExtra("item", position);
startActivity(intent);
TextView textView = (TextView) view.findViewById(R.id.descitem);
textView.setTypeface(null, Typeface.NORMAL);
}
});
textView = (TextView) findViewById(R.id.count);
}
private void changed() {
runOnUiThread(new Runnable() {
#Override
public void run() {
adapter.notifyDataSetChanged();
Log.d("LOG:", "adapter refresh");
}
});
}
}
MyBaseAdapter Class:
package com.example.seadog.fb_dialog;
import android.content.Context;
import android.graphics.Typeface;
import android.util.Log;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class MyBaseAdapter extends BaseAdapter {
Context context;
ArrayList<ListData> items = new ArrayList();
LayoutInflater inflater;
int id = 0;
public MyBaseAdapter(Context context, ArrayList items) {
this.context = context;
this.items = items;
inflater = LayoutInflater.from(this.context);
}
#Override
public int getCount() {
return items.size();
}
#Override
public ListData getItem(int position) {
return items.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
MyViewHolder mViewHolder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_item, parent, false);
mViewHolder = new MyViewHolder(convertView);
convertView.setTag(mViewHolder);
} else {
mViewHolder = (MyViewHolder) convertView.getTag();
}
ListData currentListData = getItem(position);
id = position > 0 ? getItem(position - 1).getID() : 0;
mViewHolder.Title.setText(currentListData.getTitle());
mViewHolder.Desc.setText(currentListData.getDescription());
if(1==1){
mViewHolder.Title.setVisibility(View.GONE);
}else {
if (id != currentListData.getID()) {
mViewHolder.Title.setVisibility(View.VISIBLE);
} else {
mViewHolder.Title.setVisibility(View.GONE);
}
}
return convertView;
}
private class MyViewHolder {
TextView Title, Desc;
public MyViewHolder(View item) {
Title = (TextView) item.findViewById(R.id.txtitem);
Desc = (TextView) item.findViewById(R.id.descitem);
Typeface title = Typeface.createFromAsset(context.getAssets(), "fonts/DroidSans.ttf");
Title.setTypeface(title);
Typeface desc = Typeface.createFromAsset(context.getAssets(), "fonts/DroidSans.ttf");
Desc.setTypeface(desc, Typeface.BOLD);
}
}
}

#Override
protected void onRestart() {
Intent intentBack = new Intent(getApplicationContext(),MainActivity.class);
startActivity(intentBack);
super.onRestart();
}

you did not have any callback after you back to this activity .
You can either override onResume() method or startActivityForResult and do something in the onAcitvityForResult method.

Cannot remove item from Shopping Cart android studio

I referred [this][1] and [this][2] site and tried to modify it according to my own needs. Problem is I can't remove an item from the cart. I have tried everything including searching for solutions in stackoverflow and google but no luck.
Here is my CatalogActivity.java
package com.comlu.sush.shoppingcart;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
import java.util.List;
public class CatalogActivity extends AppCompatActivity {
private List<Product> mProductList;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_catalog);
// Obtain a reference to the product catalog
mProductList = ShoppingCartHelper.getCatalog(getResources());
// Create the list
ListView listViewCatalog = (ListView) findViewById(R.id.ListViewCatalog);
listViewCatalog.setAdapter(new ProductAdapter(mProductList, getLayoutInflater(), false,false));
listViewCatalog.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Intent productDetailsIntent = new Intent(getBaseContext(),ProductDetailsActivity.class);
productDetailsIntent.putExtra(ShoppingCartHelper.PRODUCT_INDEX, position);
startActivity(productDetailsIntent);
}
});
Button viewShoppingCart = (Button) findViewById(R.id.ButtonViewCart);
viewShoppingCart.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent viewShoppingCartIntent = new Intent(getBaseContext(), ShoppingCartActivity.class);
startActivity(viewShoppingCartIntent);
}
});
}
}
ShoppingCartHelper.java
package com.comlu.sush.shoppingcart;
import android.content.res.Resources;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Vector;
public class ShoppingCartHelper {
public static final String PRODUCT_INDEX = "PRODUCT_INDEX";
private static List<Product> catalog;
private static Map<Product, ShoppingCartEntry> cartMap = new HashMap<Product, ShoppingCartEntry>();
public static List<Product> getCatalog(Resources res){
if(catalog == null) {
catalog = new Vector<Product>();
catalog.add(new Product("Dead or Alive", res
.getDrawable(R.drawable.first),
"Dead or Alive by Tom Clancy with Grant Blackwood", 29.99));
catalog.add(new Product("Switch", res
.getDrawable(R.drawable.second),
"Switch by Chip Heath and Dan Heath", 24.99));
catalog.add(new Product("Watchmen", res
.getDrawable(R.drawable.third),
"Watchmen by Alan Moore and Dave Gibbons", 14.99));
}
return catalog;
}
public static void setQuantity(Product product, int quantity) {
// Get the current cart entry
ShoppingCartEntry curEntry = cartMap.get(product);
// If the quantity is zero or less, remove the products
if(quantity <= 0) {
if(curEntry != null)
removeProduct(product);
return;
}
// If a current cart entry doesn't exist, create one
if(curEntry == null) {
curEntry = new ShoppingCartEntry(product, quantity);
cartMap.put(product, curEntry);
return;
}
// Update the quantity
curEntry.setQuantity(quantity);
}
public static int getProductQuantity(Product product) {
// Get the current cart entry
ShoppingCartEntry curEntry = cartMap.get(product);
if(curEntry != null)
return curEntry.getQuantity();
return 0;
}
public static void removeProduct(Product product) {
cartMap.remove(product);
}
public static List<Product> getCartList() {
List<Product> cartList = new Vector<Product>(cartMap.keySet().size());
for(Product p : cartMap.keySet()) {
cartList.add(p);
}
return cartList;
}
}
ShoppingCartActiity.java
package com.comlu.sush.shoppingcart;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import java.util.List;
public class ShoppingCartActivity extends AppCompatActivity {
private List<Product> mCartList;
private ProductAdapter mProductAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shopping_cart);
mCartList = ShoppingCartHelper.getCartList();
// Make sure to clear the selections
for(int i=0; i<mCartList.size(); i++) {
mCartList.get(i).selected = false;
}
// Create the list
final ListView listViewCatalog = (ListView) findViewById(R.id.ListViewCatalog);
mProductAdapter = new ProductAdapter(mCartList, getLayoutInflater(), true,true);
listViewCatalog.setAdapter(mProductAdapter);
listViewCatalog.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
mProductAdapter.toggleSelection(position);
}
});
removeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mProductAdapter.removeSelected();
}
});
}
#Override
protected void onResume() {
super.onResume();
// Refresh the data
if(mProductAdapter != null) {
mProductAdapter.notifyDataSetChanged();
}
}
}
ProductDetailsActivity.java
package com.comlu.sush.shoppingcart;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
public class ProductDetailsActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_product_details);
final int result=0;
List<Product> catalog = ShoppingCartHelper.getCatalog(getResources());
int productIndex = getIntent().getExtras().getInt(
ShoppingCartHelper.PRODUCT_INDEX);
final Product selectedProduct = catalog.get(productIndex);
// Set the proper image and text
ImageView productImageView = (ImageView) findViewById(R.id.ImageViewProduct);
productImageView.setImageDrawable(selectedProduct.productImage);
TextView productTitleTextView = (TextView) findViewById(R.id.TextViewProductTitle);
productTitleTextView.setText(selectedProduct.title);
TextView productDetailsTextView = (TextView) findViewById(R.id.TextViewProductDetails);
productDetailsTextView.setText(selectedProduct.description);
// Update the current quantity in the cart
TextView textViewCurrentQuantity = (TextView) findViewById(R.id.textViewCurrentlyInCart);
textViewCurrentQuantity.setText("Currently in Cart: "
+ ShoppingCartHelper.getProductQuantity(selectedProduct));
// Save a reference to the quantity edit text
final EditText editTextQuantity = (EditText) findViewById(R.id.editTextQuantity);
Button addToCartButton = (Button) findViewById(R.id.ButtonAddToCart);
addToCartButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Check to see that a valid quantity was entered
int quantity = 0;
try {
quantity = Integer.parseInt(editTextQuantity.getText()
.toString());
if (quantity < 0) {
Toast.makeText(getBaseContext(),
"Please enter a quantity of 0 or higher",
Toast.LENGTH_SHORT).show();
return;
}
} catch (Exception e) {
Toast.makeText(getBaseContext(),
"Please enter a numeric quantity",
Toast.LENGTH_SHORT).show();
return;
}
// If we make it here, a valid quantity was entered
ShoppingCartHelper.setQuantity(selectedProduct, quantity);
// Close the activity
finish();
}
});
}
}
ProductAdapter.java
package com.comlu.sush.shoppingcart;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;
public class ProductAdapter extends BaseAdapter {
private List<Product> mProductList;
private LayoutInflater mInflater;
private boolean mShowQuantity;
private boolean mShowCheckbox;
public ProductAdapter(List<Product> list, LayoutInflater inflater, boolean showQuantity, boolean showCheckbox) {
mProductList = list;
mInflater = inflater;
mShowQuantity = showQuantity;
mShowCheckbox = showCheckbox;
}
#Override
public int getCount() {
return mProductList.size();
}
#Override
public Object getItem(int position) {
return mProductList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewItem item;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item, null);
item = new ViewItem();
item.productImageView = (ImageView) convertView
.findViewById(R.id.ImageViewItem);
item.productTitle = (TextView) convertView
.findViewById(R.id.TextViewItem);
item.productQuantity = (TextView) convertView
.findViewById(R.id.textViewQuantity);
item.productCheckbox = (CheckBox) convertView.findViewById(R.id.CheckBoxSelected);
convertView.setTag(item);
} else {
item = (ViewItem) convertView.getTag();
}
Product curProduct = mProductList.get(position);
item.productImageView.setImageDrawable(curProduct.productImage);
item.productTitle.setText(curProduct.title);
if(!mShowCheckbox) {
item.productCheckbox.setVisibility(View.GONE);
} else {
if(curProduct.selected == true)
item.productCheckbox.setChecked(true);
else
item.productCheckbox.setChecked(false);
}
// Show the quantity in the cart or not
if (mShowQuantity) {
item.productQuantity.setText("Quantity: "
+ ShoppingCartHelper.getProductQuantity(curProduct));
} else {
// Hid the view
item.productQuantity.setVisibility(View.GONE);
}
return convertView;
}
public void toggleSelection(int position) {
Product selectedProduct = (Product) getItem(position);
if(selectedProduct.selected) { // no need to check " == true"
selectedProduct.selected = false;
}
else {
selectedProduct.selected = true;
}
notifyDataSetInvalidated();
}
public void removeSelected() {
for(int i=mProductList.size()-1; i>=0; i--) {
if(mProductList.get(i).selected) {
mProductList.remove(i);
}
}
notifyDataSetChanged();
}
private class ViewItem {
ImageView productImageView;
TextView productTitle;
TextView productQuantity;
CheckBox productCheckbox;
}
}

You should move data manipulation to the adapter, and design-wise it would make sense and might also fix the problem you're telling us.
Write this method in your ProductAdapter:
public void removeSelected() {
for(int i = mProductList.size()-1; i >= 0; i--) {
if(mProductList.get(i).selected) {
mProductList.remove(i);
}
}
notifyDataSetChanged();
}
Update your OnClickListener (in your ShoppingCartActiity of course):
removeButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
mProductAdapter.removeSelected();
}
});
Edit
I noticed that you aren't applying OOP's concept of encapsulation here. That is, ShoppingCartActiity shouldn't be making changes to the data which belongs to your adapter.
So, just create public methods inside the ProductAdapter for item for selection, etc and call them from ShoppingCartActiity as needed.
Copy this method in your ProductAdapter:
public void toggleSelection(int position) {
Product selectedProduct = (Product) getItem(position);
if(selectedProduct.selected) { // no need to check " == true"
selectedProduct.selected = false;
}
else {
selectedProduct.selected = true;
}
notifyDataSetInvalidated();
}
mProductAdapter.toggleSelection(position); will replace following code ShoppingCartActiity:
Product selectedProduct = mCartList.get(position);
if(selectedProduct.selected == true)
selectedProduct.selected = false;
else
selectedProduct.selected = true;
mProductAdapter.notifyDataSetInvalidated();
Edit2
The problem is that the ShoppingCartActiity takes items from ShoppingCartEntry on starting up, but it never writes back the changes to it when you remove items.
update your removeButton's onClick() to:
mProductAdapter.removeSelected();
if (product.selected) {
// set products which are remaining in the adapter
ShoppingCartHelper.setProducts(mProductAdapter.getProducts());
}
ShoppingCartHelper.setProducts() would replace the old data with the passed one:
public static void setProducts(ArrayList<Product> products) {
catalog = new Vector<Product>();
for (Product product : products) {
catalog.add(product);
}
}
mProductAdapter.getProducts() will just return the list of Products, like:
public List<Product> getProducts() {
return mProductList;
}

you just have to remove selected item from list, and after adapter.notifiyDataSetChanged() it will refresh the adapter.
removeButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Loop through and remove all the products that are selected
// Loop backwards so that the remove works correctly
for(int i=mCartList.size()-1; i>=0; i--) {
if(mCartList.get(i).selected) {
mCartList.remove(i);
//mProductAdapter.removeSelected();
}
}
if(mProductAdapter!=null)
mProductAdapter.notifyDataSetChanged();
}
});

Custom Adapter not working Properly in android

I hakve made a custom adaptor for binding parsed data into a listView,I have tried as below,But it only gives me 1st value .please help me.I want to bind all the values to listView but currently i only able to bind only 1\one value in it..
Registration.java
package com.epe.yehki.ui;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.epe.yehki.adapter.CountryAdapter;
import com.epe.yehki.adapter.WholesaleProductAdapter;
import com.epe.yehki.backend.BackendAPIService;
import com.epe.yehki.backend.RegisterationAPI;
import com.epe.yehki.backend.ResponseListener;
import com.epe.yehki.uc.Menu;
import com.epe.yehki.util.Const;
import com.epe.yehki.util.Const.API_RESULT;
import com.example.yehki.R;
public class RegistrationActivity extends Activity {
public RegisterationAPI registartionAPI;
private EditText fName;
private EditText lName;
private EditText eMail;
private Button register;
private EditText contact;
private EditText password;
private ListView countrylist;
private ListView statelist;
private TextView tv_country;
private TextView state;
JSONArray countries = null;
// Fetching List
JSONObject jsonObj;
JSONArray contries = null;
ArrayList<HashMap<String, String>> countryList;
private CountryAdapter countryContent;
// Hashmap for ListView
public com.epe.yehki.uc.Menu regMenu;
private ProgressDialog progressDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_registration);
// FINDING IDS...
fName = (EditText) findViewById(R.id.et_fname);
lName = (EditText) findViewById(R.id.et_lname);
eMail = (EditText) findViewById(R.id.et_email);
contact = (EditText) findViewById(R.id.et_contact);
password = (EditText) findViewById(R.id.et_pwd);
tv_country = (TextView) findViewById(R.id.et_country);
state = (TextView) findViewById(R.id.et_state);
regMenu = (Menu) findViewById(R.id.menuReg);
register = (Button) findViewById(R.id.btn_register);
countrylist = (ListView) findViewById(R.id.country_list);
countrylist.setVisibility(View.GONE);
statelist = (ListView) findViewById(R.id.state_list);
countryList = new ArrayList<HashMap<String, String>>();
regMenu.setSelectedTab(1);
new GetCountries().execute();
countrylist.setVisibility(View.GONE);
// COUNTRY LIST CLICK EVENT...!!!
countrylist.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// getting values from selected ListItem
String countryname = ((TextView) view.findViewById(R.id.name)).getText().toString();
tv_country.setText(countryname);
// countrylist.setVisibility(view.GONE);
}
});
// REGISTER BUTTOM CLICK EVENT.....!
register.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
if (!fName.getText().toString().equals("") && fName.getText().toString() != null) {
if ((!lName.getText().toString().equals("") && lName.getText().toString() != null)) {
if ((!tv_country.getText().toString().equals("") && tv_country.getText().toString() != null)) {
if ((!state.getText().toString().equals("") && state.getText().toString() != null)) {
if ((!eMail.getText().toString().equals("") && eMail.getText().toString() != null)) {
if ((!password.getText().toString().equals("") && password.getText().toString() != null)) {
if ((!contact.getText().toString().equals("") && contact.getText().toString() != null)) {
} else {// CONTACT NUMBER
validation(getResources().getString(R.string.valid_number));
password.requestFocus();
}
} else {// password...
validation(getResources().getString(R.string.valid_pwd));
password.requestFocus();
}
} else {// EMAIL
validation(getResources().getString(R.string.valid_mail));
eMail.requestFocus();
}
} else {// STATE
validation(getResources().getString(R.string.valid_state));
state.requestFocus();
}
} else {// COUNTRY
validation(getResources().getString(R.string.valid_country));
tv_country.requestFocus();
}
} else {// LAST NAME
validation(getResources().getString(R.string.valid_lname));
lName.requestFocus();
}
} else {// FIRST NAME
validation(getResources().getString(R.string.valid_fname));
fName.requestFocus();
}
}
});
// COUINTRY LIST CLICK EVENT...!!!!
tv_country.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
countrylist.setVisibility(View.VISIBLE);
}
});
}
void validation(String msg) {
Toast.makeText(RegistrationActivity.this, msg, Toast.LENGTH_SHORT).show();
}
ResponseListener responseListener = new ResponseListener() {
#Override
public void onResponce(String api, API_RESULT result, Object obj) {
System.out.println("::::::::::::::inside response Listener::::::::");
if (progressDialog != null && progressDialog.isShowing())
progressDialog.dismiss();
if (api.equals(Const.API_LOGIN)) {
System.out.println("::::::::::::::inside response Listener::::::::1");
if (result == Const.API_RESULT.SUCCESS) {
registartionAPI = null;
// as
// doctor
System.out.println("success Login::::::::::>>>>>>>>>>>>>>>>>>" + result);
startActivity(new Intent(RegistrationActivity.this, HomeActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
} else {
System.out.println("failed Login::::::::::>>>>>>>>>>>>>>>>>>" + result);
}
}
}
};
// ASYNC TASK FOR GETTING COUNTRY LIST...!!!
private class GetCountries extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
BackendAPIService sh = new BackendAPIService();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(Const.API_COUTRY, BackendAPIService.GET);
Log.d("Response: ", "> " + jsonStr);
try {
if (jsonStr != null) {
jsonObj = new JSONObject(jsonStr);
if (jsonObj.has(Const.TAG_COUNTY_LIST)) {
contries = jsonObj.getJSONArray(Const.TAG_COUNTY_LIST);
System.out.println(":::::::::PRODUCT lENGTH:::::::::::" + contries.length());
if (contries != null && contries.length() != 0) {
// looping through All Contacts
for (int i = 0; i < contries.length(); i++) {
JSONObject c = contries.getJSONObject(i);
String Con_id = c.getString(Const.TAG_COUNTRY_ID);
System.out.println("::::::::::::::::::PARSING PRODUCT ID:::::::::::::" + Con_id);
String CountryName = c.getString(Const.TAG_COUNTRY_NAME);
HashMap<String, String> country = new HashMap<String, String>();
// adding each child node to HashMap key =>
// value
country.put(Const.TAG_COUNTRY_ID, Con_id);
country.put(Const.TAG_COUNTRY_NAME, CountryName);
countryList.add(country);
}
}
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
} catch (JSONException e) {
e.printStackTrace();
System.out.println("::::::::::::::::::got an error::::::::::::");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
countryContent = new CountryAdapter(RegistrationActivity.this, countryList);
countrylist.setAdapter(countryContent);
}
}
}
Adapter.java
package com.epe.yehki.adapter;
import java.util.ArrayList;
import java.util.HashMap;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.epe.yehki.util.Const;
import com.example.yehki.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
public class CountryAdapter extends BaseAdapter {
public ArrayList<HashMap<String, String>> countryArray;
private Context mContext;
public CountryAdapter(Context paramContext, ArrayList<HashMap<String, String>> countryList) {
this.mContext = paramContext;
this.countryArray = countryList;
}
public int getCount() {
return this.countryArray.size();
}
public Object getItem(int paramInt) {
return Integer.valueOf(paramInt);
}
public long getItemId(int paramInt) {
return paramInt;
}
#SuppressWarnings("static-access")
public View getView(int paramInt, View paramView, ViewGroup paramViewGroup) {
LayoutInflater localLayoutInflater = (LayoutInflater) this.mContext.getSystemService("layout_inflater");
Viewholder localViewholder = null;
if (paramView == null) {
paramView = localLayoutInflater.inflate(R.layout.list_item, paramViewGroup, false);
localViewholder = new Viewholder();
localViewholder.con_id = ((TextView) paramView.findViewById(R.id.cat_id));
localViewholder.con_name = ((TextView) paramView.findViewById(R.id.name));
paramView.setTag(localViewholder);
} else {
localViewholder = new Viewholder();
localViewholder = (Viewholder) paramView.getTag();
}
localViewholder.con_name.setText(countryArray.get(paramInt).get(Const.TAG_COUNTRY_NAME));
System.out.println("::::::::::::::::::;PRDUCT name" + countryArray.get(paramInt).get(Const.TAG_COUNTRY_NAME));
return paramView;
}
static class Viewholder {
TextView con_id;
TextView con_name;
}
}

Please try the following class:
public class CountryAdapter extends BaseAdapter {
public ArrayList<HashMap<String, String>> countryArray;
private Context mContext;
public a(Context paramContext, ArrayList<HashMap<String, String>> countryList) {
this.mContext = paramContext;
this.countryArray = countryList;
}
public int getCount() {
return countryArray.size();
}
public Object getItem(int paramInt) {
return countryArray.get(paramInt);
}
public long getItemId(int paramInt) {
return paramInt;
}
#SuppressWarnings("static-access")
public View getView(int paramInt, View paramView, ViewGroup paramViewGroup) {
Viewholder localViewholder;
LayoutInflater localLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (paramView == null) {
paramView = localLayoutInflater.inflate(R.layout.list_item, paramViewGroup, false);
localViewholder = new Viewholder();
localViewholder.con_id = ((TextView) paramView.findViewById(R.id.cat_id));
localViewholder.con_name = ((TextView) paramView.findViewById(R.id.name));
paramView.setTag(localViewholder);
} else {
localViewholder = (Viewholder) paramView.getTag();
}
HashMap<String, String> data = (HashMap<String, String>) getItem(paramInt);
localViewholder.con_name.setText(data.get(Const.TAG_COUNTRY_NAME));
return paramView;
}
static class Viewholder {
TextView con_id;
TextView con_name;
}
}
Please note you can't use System.out.println on Android, please use Log class instead: Log.d("myTag", "message").

Please update the line
LayoutInflater localLayoutInflater = (LayoutInflater) this.mContext.getSystemService("layout_inflater");
to
LayoutInflater localLayoutInflater = (LayoutInflater) this.mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

remove localViewholder = new Viewholder(); from getView else condition. Here you are creating a new holder object every time.
It should be
else {
localViewholder = (Viewholder) paramView.getTag();
}

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.

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