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Main Activity toolbar not showing after hiding when attaching fragment

I am attaching a fragment from a fragment that is attached to an activity and then inside the fragment i have set my custom toolbar with set setDisplayHomeUpEnabled to true. when am attaching the fragment i have set the Main activity toolbar to be hidden, the only problem is that it is not being unhidden when am returning to the parent fragment from the child fragment
package manu.apps.cartv6.Activities;
import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.view.GravityCompat;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.google.android.material.navigation.NavigationView;
import com.google.android.material.snackbar.Snackbar;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import manu.apps.cartv6.Classes.CartCounterConverter;
import manu.apps.cartv6.Classes.Config;
import manu.apps.cartv6.Classes.Product;
import manu.apps.cartv6.Classes.UserSessionManager;
import manu.apps.cartv6.Fragments.UserProfileFragment;
import manu.apps.cartv6.Fragments.ViewProductsFragment;
import manu.apps.cartv6.Interfaces.AddRemoveCallbacks;
import manu.apps.cartv6.R;
import manu.apps.cartv6.Tests.CartFragment;
public class MainActivity extends AppCompatActivity implements View.OnClickListener, NavigationView.OnNavigationItemSelectedListener, AddRemoveCallbacks {
/** Lists*/
public static List<Product> cartList = new ArrayList<>();
/** Variables*/
// Counter for Cart
public static int cart_count = 0;
// Get Id for users
String getId;
// Time Interval for back button press
private static final int TIME_INTERVAL = 2000; // # milliseconds, desired time passed between two back presses.
// How long the back button has been pressed
private long backPressed;
//Getting Class Info
private static final String TAG = MainActivity.class.getSimpleName();
/** Views*/
// Toolbars
Toolbar toolbar;
// TextViews
TextView navHeaderUsername;
// ImageViews
ImageView navHeaderProfileImage;
/** Session Managing*/
UserSessionManager userSessionManager;
/** Navigation Drawer*/
//Declaring ActionBarDrawerToggle
private ActionBarDrawerToggle actionBarDrawerToggle;
//Declaring Navigation View
NavigationView navigationView;
//Declaring Drawer Layout
DrawerLayout drawerLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Creating a Session Manager for the Users
userSessionManager = new UserSessionManager(this);
userSessionManager.checkUserLogin();
//Finding Drawer Layout
drawerLayout = findViewById(R.id.drawer_layout);
//Finding Navigation View
navigationView = findViewById(R.id.navigation_view);
//Finding Toolbar
toolbar = findViewById(R.id.main_tool_bar);
//Toolbar Workings
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Home");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// Setting View Products Fragment
Fragment fragment = new ViewProductsFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout,fragment).commit();
//Setting ActionBarDrawerToggle to Open and Close
actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,R.string.open,R.string.close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
// Setting Navigation Item Selected Listener for Items in Navigation View
navigationView.setNavigationItemSelectedListener(this);
/**
* app:headerLayout="#layout/layout_nav_header"
*
* Remove the above line in NavigationView because we are inflating programmatically
*
* */
View navView = navigationView.inflateHeaderView(R.layout.layout_nav_header);
//Finding Views in Navigation Header which is inside Navigation View
navHeaderUsername = navView.findViewById(R.id.nav_header_username);
navHeaderProfileImage = navView.findViewById(R.id.nav_header_profile_image);
// Parsing Username and Email
HashMap<String, String> user = userSessionManager.getUserDetails();
getId = user.get(userSessionManager.ID);
}
// Fetch User Details
private void fetchUserDetails(){
final ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Loading...");
//progressDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST, Config.FETCH_USER_DETAILS,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
progressDialog.dismiss();
Log.i(TAG, response.toString());
try {
JSONObject jsonObject = new JSONObject(response);
String success = jsonObject.getString("success");
JSONArray jsonArray = jsonObject.getJSONArray("fetch");
if (success.equals("1")) {
for (int i = 0; i < jsonArray.length();i++) {
JSONObject object = jsonArray.getJSONObject(i);
String username = object.getString("username").trim();
String email = object.getString("email").trim();
// Set Details for the Navigation Header
navHeaderUsername.setText(username);
//etProfileUsername.setText(username);
//etProfileEmail.setText(email);
}
}
} catch (JSONException e) {
e.printStackTrace();
progressDialog.dismiss();
Toast.makeText(MainActivity.this, "JSON Error fetching Details", Toast.LENGTH_SHORT).show();
Snackbar.make(getWindow().getDecorView().getRootView(),e.toString(),Snackbar.LENGTH_LONG).show();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
progressDialog.dismiss();
Toast.makeText(MainActivity.this, "Volley Error fetching Details", Toast.LENGTH_SHORT).show();
Snackbar.make(getWindow().getDecorView().getRootView(),error.toString(),Snackbar.LENGTH_LONG).show();
}
})
{
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String > params = new HashMap<>();
params.put("id", getId);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
public static String numberFormatter(double d) {
DecimalFormat decimalFormat = new DecimalFormat("#,###.##");
return decimalFormat.format(d);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.user_toolbar_menu_items, menu);
MenuItem cartItem = menu.findItem(R.id.cart_action);
cartItem.setIcon(CartCounterConverter.convertLayoutToImage(MainActivity.this,cart_count,R.drawable.view_cart_icon));
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Check if Action Bar Drawer Toggle has been selected
if(actionBarDrawerToggle.onOptionsItemSelected(item)){
return true;
}
switch (item.getItemId()) {
case R.id.cart_action:
//startActivity(new Intent(MainActivity.this,CartActivity.class));
Fragment fragment = new CartFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout,fragment).commit();
getSupportActionBar().hide();
break;
case R.id.logout_action:
userSessionManager.logOutUser();
finish();
default:
break;
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
Fragment fragment = null;
/*switch (item.getItemId()) {
case R.id.action_category_one:
Toast.makeText(this, "Under Development", Toast.LENGTH_SHORT).show();
break;
case R.id.action_profile:
fragment = new UserProfileFragment();
break;
}*/
int id = item.getItemId();
if (id == R.id.action_view_products) {
fragment = new ViewProductsFragment();
}
// else if (id == R.id.action_receipts) {
// }
else if (id == R.id.action_profile) {
//startActivity(new Intent(MainActivity.this,UserProfileActivity.class));
fragment = new UserProfileFragment();
}
if (fragment !=null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction ft = fragmentManager.beginTransaction();
//R.id." " will be found in content_main.xml from the Frame Layout
ft.replace(R.id.frame_layout,fragment);
ft.commit();
}
drawerLayout.closeDrawer(GravityCompat.START);
return true;
}
#Override
public void onClick(View v) {
}
// When back button is pressed method
#Override
public void onBackPressed() {
//Check if navigation drawer is opened or closed
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else {
if (backPressed + TIME_INTERVAL > System.currentTimeMillis()) {
super.onBackPressed();
return;
} else {
Toast.makeText(getBaseContext(), "Press back button again to exit", Toast.LENGTH_SHORT).show();
}
backPressed = System.currentTimeMillis();
}
}
#Override
protected void onResume() {
super.onResume();
fetchUserDetails();
}
// Remember to implement AddRemoveCallback Interface
#Override
public void onAddProduct() {
cart_count++;
invalidateOptionsMenu();
}
// Remember to implement AddRemoveCallback Interface
#Override
public void onRemoveProduct() {
cart_count--;
invalidateOptionsMenu();
}
}
My child fragment
package manu.apps.cartv6.Tests;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.widget.Toolbar;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import manu.apps.cartv6.Activities.MainActivity;
import manu.apps.cartv6.Fragments.ViewProductsFragment;
import manu.apps.cartv6.R;
/**
* A simple {#link Fragment} subclass.
*/
public class CartFragment extends Fragment {
Toolbar fragmentCartToolbar;
public CartFragment() {
// Required empty public constructor
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//((MainActivity) getActivity()).getSupportActionBar().hide();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_cart, container, false);
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
fragmentCartToolbar = view.findViewById(R.id.fragment_cart_tool_bar);
((MainActivity) getActivity()).setSupportActionBar(fragmentCartToolbar);
((MainActivity) getActivity()).getSupportActionBar().setTitle("Blank Fragment");
((MainActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
((MainActivity) getActivity()).getSupportActionBar().setDisplayShowHomeEnabled(true);
final Toolbar bar = (Toolbar) getActivity().findViewById(R.id.main_tool_bar);
fragmentCartToolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
((MainActivity) getActivity()).setSupportActionBar(bar);
//((MainActivity) getActivity()).getSupportActionBar().show();
Fragment fragment = new ViewProductsFragment();
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout,fragment).commit();
}
});
}
}
The problem is that the moment i add setNavigationOnClickListener the Main Activity toolbar doesn't show again when i remove it, it shows perfectly
#Override
public void onResume() {
super.onResume();
((MainActivity)getActivity()).getSupportActionBar().hide();
((MainActivity) getActivity()).setSupportActionBar(fragmentCartToolbar);
((MainActivity) getActivity()).getSupportActionBar().setTitle("Blank Fragment");
((MainActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
//((MainActivity) getActivity()).getSupportActionBar().setDisplayShowHomeEnabled(true);
fragmentCartToolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Fragment fragment = new ViewProductsFragment();
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout,fragment).commit();
}
});
}

Please try to add below in your parent fragment's onResume(), I guess it's ViewProductsFragment from the provided code.
This will allow you to hide the action bar from the fragment itself rather than the activity.
#Override
public void onResume() {
super.onResume();
((AppCompatActivity)getActivity()).getSupportActionBar().hide();
}

onBackPressed() unfortunately app has stopped in android phone

I am developing an eCommerce application where most of the java class file using Async Task for fetching data from server and I am using fragment in all java class . My problem is that when I click OnBackPressed it shows error in Async Task line because it takes some time interval again to fetch data from server..
MainActivity.java
package com.prashant;
import android.app.SearchManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.MenuItemCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.os.Handler;
import android.widget.GridView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements android.support.v7.app.ActionBar.OnNavigationListener {
TextView txtView;
private static MainActivity sMainActivity;
ProgressBar prgLoading;
RelativeLayout drawerPane;
DrawerLayout drawerLayout;
GridView lvNav;
TextView Customer_name;
TextView Customer_email;
TextView Customer_mob;
List<NavItem> listNavItems;
List<Fragment> listFragment;
private Boolean exit = false;
ActionBarDrawerToggle actionBarDrawerToggle;
public int hot_number = Constants.ProductCart_Id.size();
private TextView ui_hot = null;
private boolean mNaviFirstHit = true;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sMainActivity = this;
// Styling Action Bar
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.rgb(7,112,200)));
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
//Getting Session Information Of Customer
String MyPREFERENCES = "CustomerData";
SharedPreferences sharedpreferences =getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
Constants.Customer_FirstName= sharedpreferences.getString("Customer_FirstName","");
Constants.Customer_LastName=sharedpreferences.getString("Customer_LastName", "");
Constants.Customer_MobileNo=sharedpreferences.getString("Customer_MobileNo", "");
Constants.Customer_Id=sharedpreferences.getInt("Customer_Id", 0);
Constants.Customer_Email=sharedpreferences.getString("Customer_Email", "");
Customer_email.setText(Constants.Customer_Email);
//Asigning FRagment names of sidebar
listNavItems = new ArrayList<NavItem>();
listNavItems.add(new NavItem("Home", null, R.drawable.pras));
for(int i=0;i<Constants.Category_name.size();i++){
listNavItems.add(new NavItem(Constants.Category_name.get(i),null,R.drawable.teju));
}
NavListAdapter navListAdapter = new NavListAdapter(getApplicationContext(), R.layout.item_nav_list, listNavItems);
lvNav.setAdapter(navListAdapter);
listFragment = new ArrayList<Fragment>();
listFragment.add(new MyHome());
for(int i=0;i<Constants.Category_name.size();i++){
listFragment.add(new ProductsListFragment());
}
listFragment.add(new MyHome());
listFragment.add(new ActivityCart());
listFragment.add(new LoginFragment());
listFragment.add(new MyAbout());
//Asigning FRagment names of sidebar
//Saving fragment data as constants for my home categories
Constants.listNavItems=listNavItems;
Constants.listFragment=listFragment;
//Saving fragment data as constants for my home categories
//Load first fragment as default:
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.main_content, listFragment.get(0)).commit();
setTitle(listNavItems.get(0).getTitle());
lvNav.setItemChecked(0, true);
drawerLayout.closeDrawer(drawerPane);
// create listener for drawer layout
actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.drawer_open , R.string.drawer_close)
{
#Override
public void onDrawerOpened(View drawerView)
{
invalidateOptionsMenu();
super.onDrawerOpened(drawerView);
}
#Override
public void onDrawerClosed(View drawerView)
{
invalidateOptionsMenu();
super.onDrawerClosed(drawerView);
}
};
drawerLayout.setDrawerListener(actionBarDrawerToggle);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
final Menu mMenu = menu;
MenuInflater mif = getMenuInflater();
mif.inflate(R.menu.actionbar_icon_menu, menu);
// Cart Icon in Action Bar
final View menu_hotlist = menu.findItem(R.id.cart_icon).getActionView();
ui_hot = (TextView) menu_hotlist.findViewById(R.id.hotlist_Cart_hot);
updateHotCount(hot_number);
menu_hotlist.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Constants.lastDetails = false;
FragmentManager fragmentManager = getSupportFragmentManager();
ActivityCart cart = new ActivityCart();
fragmentManager.beginTransaction().replace(R.id.main_content, cart).commit();
setTitle("Cart");
drawerLayout.closeDrawer(drawerPane);
}
});
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item){
if(actionBarDrawerToggle.onOptionsItemSelected(item))
return true;
// Take appropriate action for each action item click
switch (item.getItemId()) {
case R.id.cart_icon:
// search action
FragmentManager fragmentManager = getSupportFragmentManager();
ActivityCart cart = new ActivityCart();
fragmentManager.beginTransaction().replace(R.id.main_content, cart).commit();
setTitle("Cart");
drawerLayout.closeDrawer(drawerPane);
return true;
case R.id.action_search:
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
actionBarDrawerToggle.syncState();
}
#Override
public void onBackPressed() {
if (getFragmentManager().getBackStackEntryCount() >0) {
getFragmentManager().popBackStack();
} else {
super.onBackPressed();
}
}
#Override
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
if (mNaviFirstHit) {
mNaviFirstHit = false;
return true;
}
else {
if(itemPosition == 0)
Constants.isCallParent = true;
else
Constants.isCallParent = false;
Constants.SubCatposition = itemPosition;
ProductsListFragment productsListFragment = new ProductsListFragment();
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.main_content, productsListFragment).commit();
//lvNav.setItemChecked(position, true);
drawerLayout.closeDrawer(drawerPane);
//Toast.makeText(this, "Clicked at: " + itemPosition, Toast.LENGTH_LONG).show();
//mNaviFirstHit = true;
return true;
}
}
public void setLoginDetails(){
Customer_email.setText(Constants.Customer_Email);
Customer_name.setText("Welcome, " + Constants.Customer_FirstName);
Customer_name.setText(Constants.Customer_LastName);
}
}
ProductListFragment.java
package com.prashant;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.GridView;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
import java.util.ArrayList;
/**
* Created by prashant.
*/
public class ProductsListFragment extends Fragment {
ProgressDialog pdialog;
View v;
Button sort,filter;
//ListView list;
GridView list;
LazyImageLoadAdapter adapter;
private static ProductsListFragment sProductsListFragment;
// Title navigation Spinner data
private ArrayList<SpinnerNavItem> navSpinner;
// Navigation adapter
private TitleNavigationAdapter titleNavigationAdapter;
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//((AppCompatActivity) getActivity()).getSupportActionBar().setSubtitle(null);
//((MainActivity)getActivity()).actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
// Action Bar
((MainActivity)getActivity()).getSupportActionBar().setDisplayShowTitleEnabled(false);
((MainActivity)getActivity()).getSupportActionBar().setNavigationMode(((MainActivity) getActivity()).getSupportActionBar().NAVIGATION_MODE_LIST);
}
#Override
public View onCreateView(LayoutInflater inflater,#Nullable ViewGroup container,#Nullable Bundle savedInstanceState) {
v = inflater.inflate(R.layout.productlistfragment, container, false);
sProductsListFragment = this;
list=(GridView)v.findViewById(R.id.list);
sort = (Button) v.findViewById(R.id.btn_sort);
sort.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getActivity(),Pop.class));
}
});
//clearData();
return v;
}
#Override
public void onResume() {
super.onResume();
((AppCompatActivity) getActivity()).getSupportActionBar().setSubtitle(null);
((MainActivity)getActivity()).actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
}
#Override
public void onPause() {
super.onPause();
((MainActivity)getActivity()).getSupportActionBar().setDisplayShowTitleEnabled(true);
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Constants.cartEntry=0;
//check Product Description fragment is called or not
if (!Constants.lastDetails) {
clearData();
new getDataTask().execute();
}
else{
String[] images=new String[Constants.Product_image.size()];
images=Constants.Product_image.toArray(images);
adapter = new LazyImageLoadAdapter(getActivity(), images);
//Set adapter to listview
list.setAdapter(adapter);
Constants.lastDetails = false;
}
}
// clear arraylist variables before used
void clearData(){
Constants.Product_ID.clear();
Constants.Product_name.clear();
Constants.Product_price.clear();
Constants.Product_image.clear();
Constants.Product_qty.clear();
Constants.Product_specialPrice.clear();
Constants.Product_desc.clear();
}
#Override
public void onDestroy()
{
// Remove adapter refference from list
//list.setAdapter(null);
//Refresh cache directory downloaded images
//adapter.imageLoader.clearCache();
//adapter.notifyDataSetChanged();
super.onDestroy();
}
public View.OnClickListener listener=new View.OnClickListener(){
#Override
public void onClick(View arg0) {
//Refresh cache directory downloaded images
adapter.imageLoader.clearCache();
adapter.notifyDataSetChanged();
}
};
public void onItemClick(int mPosition)
{
/*
Intent intent = new Intent(getActivity(), ProductDescription.class);
intent.putExtra("descposition", mPosition);
startActivity(intent);*/
Constants.product_position = mPosition;
ProductDescription productDescription=new ProductDescription();
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.main_content, productDescription, null).addToBackStack("productDescription").commit();
//((AppCompatActivity) getActivity()).getSupportActionBar().setSubtitle(Constants.Product_name.get(mPosition));
getActivity().setTitle("Product Details");
}
// Image urls used in LazyImageLoadAdapter.java file
public class getDataTask extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
if (pdialog==null){
pdialog=new ProgressDialog(getActivity());
pdialog.setMessage("Loading...");
pdialog.setCanceledOnTouchOutside(getRetainInstance());
pdialog.setCancelable(false);
pdialog.show();
}
}
#Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
// parse json data from server in background
parseJSONData();
return null;
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
// Create custom adapter for listview
String[] images=new String[Constants.Product_image.size()];
images=Constants.Product_image.toArray(images);
adapter = new LazyImageLoadAdapter(getActivity(), images);
//Set adapter to listview
list.setAdapter(adapter);
if (!Constants.isSubCategory) {
Constants.isSubCategory = true;
// Spinner title navigation data
navSpinner = new ArrayList<SpinnerNavItem>();
navSpinner.add(new SpinnerNavItem(Constants.Category_name.get(Constants.position - 1), R.drawable.icon));
for (int i = 0; i < Constants.SubCategory_ID.size(); i++) {
navSpinner.add(new SpinnerNavItem(Constants.SubCategory_name.get(i), R.drawable.icon));
}
// title drop down adapter
titleNavigationAdapter = new TitleNavigationAdapter(getActivity(), navSpinner);
// assigning the spinner navigation
((MainActivity) getActivity()).getSupportActionBar().setListNavigationCallbacks(titleNavigationAdapter, ((MainActivity) getActivity()));
}
if (pdialog.isShowing()){
pdialog.dismiss();
pdialog=null;
}
if (Constants.Product_ID.isEmpty()){
// Toast.makeText(getActivity(), "No products found!!Check your internet connection!!", Toast.LENGTH_LONG).show();
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("No Product Found!!").setMessage("Slow Internet/Check Your Internet Settings").create().show();
}
/*for (int i = 0; i < Constants.Product_ID.size(); i++) {
Toast.makeText(getActivity(), "__" + Constants.Product_ID.get(i) + "__" + i, Toast.LENGTH_SHORT).show();
}*/
// if internet connection and data available show data on list
// otherwise, show alert text
}
}
// method to parse json data from server
public void parseJSONData(){
SoapObject request = new SoapObject(Constants.NAMESPACE, "catalogCategoryAssignedProducts");
String Catid;
// add paramaters and values
request.addProperty("sessionId", Constants.sessionId);
if ((!Constants.isSubCategory) || Constants.isCallParent) {
Constants.isCallParent = false;
request.addProperty("categoryId", String.valueOf(Constants.Category_ID.get(Constants.position - 1)));
Catid=String.valueOf(Constants.Category_ID.get(Constants.position - 1));
}
else {
request.addProperty("categoryId", String.valueOf(Constants.SubCategory_ID.get(Constants.SubCatposition - 1)));
Catid=String.valueOf(Constants.SubCategory_ID.get(Constants.SubCatposition - 1));
}
api_calls call=new api_calls();
call.getCategoryProducts(Catid);
if (!Constants.isSubCategory) {
Constants.SubCategory_ID.clear();
Constants.SubCategory_name.clear();
parseJSONDataSubCategory();
}
}
// method to parse json data from server
public void parseJSONDataSubCategory(){
try {
SoapObject request = new SoapObject(Constants.NAMESPACE, "catalogCategoryTree");
// add paramaters and values
request.addProperty("sessionId", Constants.sessionId);
request.addProperty("parentId", Constants.Category_ID.get(Constants.position-1));
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
//Web method call
HttpTransportSE androidHttpTransport = new HttpTransportSE(Constants.URL);
androidHttpTransport.debug = true;
androidHttpTransport.call("", envelope);
//get the response
SoapObject result2 = (SoapObject) envelope.getResponse();
SoapObject pii2 = (SoapObject) result2.getProperty(5);
for (int i = 0; i < pii2.getPropertyCount(); i++) {
//JSONObject object = data.getJSONObject(i);
SoapObject pii = (SoapObject)pii2.getProperty(i);
//JSONObject category = object.getJSONObject("Category");
Constants.SubCategory_ID.add(Long.parseLong(pii.getProperty(0).toString()));
Constants.SubCategory_name.add(pii.getProperty(2).toString());
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
}
// Making Sub Drawer for Sub Category
public static ProductsListFragment getInstance() {
return sProductsListFragment;
}
public void onBackPressed()
{
FragmentManager fm = getActivity().getSupportFragmentManager();
fm.popBackStack();
}
}
Logcat
02-11 12:39:57.838 12954-14579/? E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #5
Process: com.softonetech.www.takenick, PID: 12954
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:309)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1
at java.util.ArrayList.get(ArrayList.java:310)
at com.prashant.ProductsListFragment.parseJSONData(ProductsListFragment.java:250)
at com.prashant.ProductsListFragment$getDataTask.doInBackground(ProductsListFragment.java:185)
at com.prashant.ProductsListFragment$getDataTask.doInBackground(ProductsListFragment.java:167)
at android.os.AsyncTask$2.call(AsyncTask.java:295)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
at java.lang.Thread.run(Thread.java:818) 

try cancelling your Async task execution during onBackPressed()
Declare:
Public getDataTask asyncFetchData;
asyncFetchData = new getDataTask();
asyncFetchData.execute();
Now in your Fragment:
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getView().setFocusableInTouchMode(true);
getView().requestFocus();
getView().setOnKeyListener(new View.OnKeyListener() {
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (asyncFetchData!= null)
asyncFetchData.cancel(true);
Toast.makeText(getActivity(), "Back pressed...", Toast.LENGTH_SHORT).show();
return true;
}
}
return false;
}
});
}
Also in doInBackground notify the AsyncTask to cancel execution
#Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
// parse json data from server in background
parseJSONData();
if (isCancelled()) break;
return null;
}

First item displayed two times in the Listview Android

Hi I already posted the question before but again same question with details ,
I created a a NavigationDrawer in the app , Its working fine but the problem is that in FolderActivity the first Item as a title displayed two time in navigation drawer, I posted the code below please suggest me solution if any...!
navigation_drawer_class.java
package com.abc;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.R.*;
import android.app.ActionBar;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.AsyncTask;
import android.os.BaseBundle;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.FrameLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class navigation_drawer_class extends Activity
{
private static final int Copy = 0;
int a =0;
public static FrameLayout frameLayout;
TextView mytextview;
public static ListView mDrawerList;
public DrawerLayout mDrawerLayout;
String Fullname;
protected String[] listArray = {"Home","Queue","Inbox","Create Ticket","Search","Clients","App settings"};
protected static int position;
private static boolean isLaunch = true;
JSONObject post_details_obj,post_obj;
public static String FIRST_NAME="first_name",LAST_NAME="last_name",PROFILE_IMAGE="image_name";
JSONArray staff_data_array;
private ActionBarDrawerToggle actionBarDrawerToggle;
Operation op=new Operation();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getActionBar().setHomeAsUpIndicator(R.drawable.crop3);//THIS ONE FOR THE DRAWER LOGO
frameLayout = (FrameLayout)findViewById(R.id.content_frame);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, listArray));
View header = (View)getLayoutInflater().inflate(R.layout.headerview_nav_drawer,null);
TextView headerValue = (TextView) header.findViewById(R.id.headerview_id);
headerValue.setText("");
new getname().execute();
mDrawerList.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
position -= mDrawerList.getHeaderViewsCount();//THIS ONE FOR THE FIRST ITEM AS TITLE
openActivity(position);
}
});
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
actionBarDrawerToggle = new ActionBarDrawerToggle(
this, // host Activity
mDrawerLayout, // DrawerLayout object
R.drawable.ic_launcher, // nav drawer image to replace 'Up' caret
R.string.open_drawer, // "open drawer" description for accessibility
R.string.close_drawer) // "close drawer" description for accessibility
{
#Override
public void onDrawerClosed(View drawerView)
{
getActionBar().setTitle(listArray[position]);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
super.onDrawerClosed(drawerView);
}
#Override
public void onDrawerOpened(View drawerView)
{
getActionBar().setTitle(getString(R.string.app_name));
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
super.onDrawerOpened(drawerView);
}
#Override
public void onDrawerSlide(View drawerView, float slideOffset)
{
super.onDrawerSlide(drawerView, slideOffset);
}
#Override
public void onDrawerStateChanged(int newState)
{
super.onDrawerStateChanged(newState);
}
};
mDrawerLayout.setDrawerListener(actionBarDrawerToggle);
if(isLaunch){
isLaunch = false;
openActivity(0);
}
}
protected void openActivity(int position) {
//mDrawerList.setItemChecked(position, true);
//setTitle(listArray[position]);
mDrawerLayout.closeDrawer(mDrawerList);
navigation_drawer_class.position = position; //Setting currently selected position in this field so that it will be available in our child activities.
switch (position) {
case 0:
startActivity(new Intent(this, Folders.class));
break;
case 1:
Intent i=new Intent(navigation_drawer_class.this,G.class);
startActivity(i);
break;
case 2:
Intent inbox=new Intent(navigation_drawer_class.this,E.class);
startActivity(inbox);
break;
case 3:
startActivity(new Intent(this, S.class));
break;
case 4:
startActivity(new Intent(this, A.class));
break;
case 5:
startActivity(new Intent(this, P.class));
break;
case 6:
startActivity(new Intent(this, V.class));
break;
default:
break;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
// getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
// The action bar home/up action should open or close the drawer.
// ActionBarDrawerToggle will take care of this.
if (actionBarDrawerToggle.onOptionsItemSelected(item))
{
return true;
}
switch (item.getItemId())
{
default:
return super.onOptionsItemSelected(item);
}
}
#Override
public boolean onPrepareOptionsMenu(Menu menu)
{
//boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
//menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
/* We can override onBackPressed method to toggle navigation drawer*/
#Override
public void onBackPressed()
{
if(mDrawerLayout.isDrawerOpen(mDrawerList))
{
mDrawerLayout.closeDrawer(mDrawerList);
}
else
{
mDrawerLayout.openDrawer(mDrawerList);
}
}
private class getname extends AsyncTask<Void, Void, JSONArray>
{
Dialog dialog;
#Override
public void onPreExecute()
{
dialog = new Dialog(navigation_drawer_class.this,android.R.style.Theme_Translucent_NoTitleBar);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.progressbar);
dialog.show();
}
#Override
protected JSONArray doInBackground(Void... params)
{
String STAFF_URL=op.getUrl(getApplicationContext(),"staff","get_staff_details","");
staff_data_array = JSONfunctions.getJSONfromURL(STAFF_URL+"&vis_encode=json",navigation_drawer_class.this);
return staff_data_array;
}
#Override
public void onPostExecute(JSONArray staff_data_array)
{
super.onPostExecute(staff_data_array);
String staff_data_result =staff_data_array.toString();
try {
post_obj = staff_data_array.getJSONObject(0);
String fname=post_obj.getString(FIRST_NAME);
String lname=post_obj.getString(LAST_NAME);
String image=post_obj.getString(PROFILE_IMAGE);
String fullname =fname;
if(fullname=="")
{
fullname="Admin";
}
Fullname="Welcome "+fullname;
View header = (View)getLayoutInflater().inflate(R.layout.headerview_nav_drawer,null);
TextView headerValue = (TextView) header.findViewById(R.id.headerview_id);
headerValue.setText(Fullname);
headerValue.setCompoundDrawablesWithIntrinsicBounds(R.drawable.default_img,0,0,0);
mDrawerList.addHeaderView(headerValue, null, false);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
dialog.dismiss();
}
}
}
Folders.java
package com.abc;
import java.util.ArrayList;
import android.R.*;
import java.util.HashMap;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ActionBar;
import android.app.Dialog;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class Folders extends navigation_drawer_class {
static final String NEW="A", OVERDUE ="B", ASSIGNED="C", TRASH="D", SPAM="E",NAME="name",COUNT="count";
ListView folders_list;
String[] folders;
String[] filter_id ={"2","3","4","5","6"};
List<String> folder_count;
JSONArray quick_view_array;
JSONObject quick_view_obj,count_obj;
String new_count, overdue_count,assigned_count,trash_count,spam_count;
List<HashMap<String, String>> menuItems;
Dialog dialog;
String URL;
Operation op=new Operation();
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
new getbrand().execute();
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
getLayoutInflater().inflate(R.layout.folders, frameLayout);
mDrawerList.setItemChecked(position, true);
setTitle(listArray[position]);
folders_list = (ListView)findViewById(R.id.folder_display_list);
folders_list.setAdapter(null);
View header = (View)getLayoutInflater().inflate(R.layout.headerview,null);
folders_list.addHeaderView(header, null, false);
if (Operation.isNetworkAvailable(this))
{
new folders().execute();
folders_list.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id)
{
position -= folders_list.getHeaderViewsCount();
String fid = filter_id[position];
String title=folders[position];
Intent i=new Intent(Folders.this,Tickets.class);
i.putExtra("filter_id","&vis_filter_id="+fid);
i.putExtra("title",title);
i.putExtra("set_queue","no");
startActivity(i);
}});
}
else
{
Operation.showToast(getApplicationContext(),R.string.no_network);
}
}
private class folders extends AsyncTask<Void, Void, JSONArray>
{
Dialog dialog;
#Override
public void onPreExecute()
{
dialog = new Dialog(Folders.this,android.R.style.Theme_Translucent_NoTitleBar);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.progressbar);
dialog.show();
}
#Override
protected JSONArray doInBackground(Void... params) {
// TODO Auto-generated method stub
URL=op.getUrl(getApplicationContext(),"ticket","quick_view","");
quick_view_array = JSONfunctions.getJSONfromURL(URL+"&vis_encode=json",Folders.this);
return quick_view_array;
}
#Override
public void onPostExecute(JSONArray quick_view_array)
{
super.onPostExecute(quick_view_array);
try
{
quick_view_obj=quick_view_array.getJSONObject(0);
count_obj=quick_view_obj.getJSONObject("count");
folder_count= new ArrayList<String>();
//folder_count.add("");
folder_count.add(count_obj.getString(NEW));
folder_count.add(count_obj.getString(OVERDUE));
folder_count.add(count_obj.getString(ASSIGNED));
folder_count.add(count_obj.getString(TRASH));
folder_count.add(count_obj.getString(SPAM));
folders = getResources().getStringArray(R.array.folders);
menuItems=new ArrayList<HashMap<String, String>>();
for (int i = 0; i <filter_id.length; i++)
{
HashMap<String, String> map = new HashMap<String, String>();
map.put(NAME,folders[i]);
map.put(COUNT,folder_count.get(i));
menuItems.add(map);
}
SimpleAdapter list =new SimpleAdapter
(Folders.this,
menuItems,
R.layout.folders,
new String[] {NAME,COUNT},
new int[] {R.id.folder_name,R.id.folder_count}
)
{ };
folders_list.setAdapter(list);
dialog.dismiss();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.home, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
.getActionView();
searchView.setSearchableInfo(searchManager
.getSearchableInfo(getComponentName()));
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
String filter_id = null,Tickets_title = null;
int start_limit=0,page_no=1;
// TODO Auto-generated method stub
switch (item.getItemId())
{
case R.id.menu_inbox:
Intent inbox = new Intent(Folders.this,Test.class);
startActivity(inbox);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
public void onBackPressed()
{
moveTaskToBack(true);
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
this.finish();
}
private class getbrand extends AsyncTask<Void, Void, JSONArray>
{
Dialog dialog;
#Override
public void onPreExecute()
{
dialog = new Dialog(Folders.this,android.R.style.Theme_Translucent_NoTitleBar);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.progressbar);
dialog.show();
}
#Override
protected JSONArray doInBackground(Void... params)
{
// TODO Auto-generated method stub
String access=op.getUrl(getApplicationContext(),"ticket","get_branding","");
JSONArray access_denied = JSONfunctions.getJSONfromURL(access+"&vis_encode=json",Folders.this);
return access_denied;
}
#Override
public void onPostExecute(JSONArray access_denied)
{
super.onPostExecute(access_denied);
String access_result =access_denied.toString();
ActionBar ab = getActionBar();
if(access_result.equals("[\"1\"]"))
{ ab.setTitle(R.string.app_name);
ab.setIcon(R.drawable.application_icon);
}
else
{
ab.setTitle(R.string.nobrand_app_name);
ab.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#ffffff")));
ab.setHomeAsUpIndicator(R.drawable.crop1);
ab.setIcon(R.drawable.white3);
}
dialog.dismiss();
}
}
private class getname extends AsyncTask<Void, Void, JSONArray>
{
Dialog dialog;
#Override
public void onPreExecute()
{
dialog = new Dialog(Folders.this,android.R.style.Theme_Translucent_NoTitleBar);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.progressbar);
dialog.show();
}
#Override
protected JSONArray doInBackground(Void... params)
{
String STAFF_URL=op.getUrl(getApplicationContext(),"staff","get_staff_details","");
staff_data_array = JSONfunctions.getJSONfromURL(STAFF_URL+"&vis_encode=json",Folders.this);
return staff_data_array;
}
#Override
public void onPostExecute(JSONArray staff_data_array)
{
super.onPostExecute(staff_data_array);
String staff_data_result =staff_data_array.toString();
try {
post_obj = staff_data_array.getJSONObject(0);
String fname=post_obj.getString(FIRST_NAME);
String lname=post_obj.getString(LAST_NAME);
String image=post_obj.getString(PROFILE_IMAGE);
String fullname =fname;
if(fullname=="")
{
fullname="Admin";
}
Fullname="Welcome "+fullname;
TextView tv = new TextView(getApplicationContext());
tv.setText(Fullname);
tv.setBackgroundColor(Color.GREEN);
tv.setCompoundDrawablesWithIntrinsicBounds(R.drawable.default_img,0,0,0);
mDrawerList.addHeaderView(tv, null, false);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
dialog.dismiss();
}
}
}

Is my Rss Reader app not working because there are too many parsers (Android Studio)?

I'm a high school student working for a magazine in South Korea known as Teen 10 Magazine. As an aspiring computer science major, I decided to make an RSS reader app for my magazine in order to showcase my skills for college applications (and also to create an app, which has always been my interest). Basically, I want to format my app to be similar to your typical news app (ex. CNN, BBC, etc).
Category Screen
In a DrawerLayout (as seen in the Category Screen), I decided to make a tab for each different category (such as News, Features, Entertainment, etc), including the Home category, which is where the categories the articles are under don't matter. When users click on each different tab, it gives them a list of articles that are categorized under that category. In order to get this data, I'm parsing the data to get the title (which is displayed in the list) and the link (which is set to an Intent so that users can access the article in the Web when it is clicked)
However, while some of the categories do work (Home, Lifestyle, Fashion), the rest of the categories are stuck in the loading screen for almost an infinite amount of time.
Example of loading category
I'm pretty sure that the codes of the categories that work and the categories that don't are the same (for reference, I copied and pasted and adjusted each different category accordingly, which could also be an issue but I'm not sure), and are getting their data from the appropriate sites.
Is it perhaps there are too many parsers (RssParser does the actual parsing and seven different "RssService"s use the parser to parse the data from each different category) for my app to work with? My app does seem to crash once in a while though...
I will post my codes below:
MainActivity.java:
package com.hfad.teen10magazine;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v7.app.ActionBarDrawerToggle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.ShareActionProvider;
import android.support.v4.widget.DrawerLayout;
public class MainActivity extends Activity {
/* adds the fragment to the activity */
private ShareActionProvider shareActionProvider;
private String[] titles;
private ListView drawerList;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle drawerToggle;
private int currentPosition = 0;
private class DrawerItemClickListener implements ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//Code to run when an item in the navigation drawer gets clicked
selectItem(position);
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
titles = getResources().getStringArray(R.array.titles);
drawerList = (ListView)findViewById(R.id.drawer);
drawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
//Initialize the ListView
drawerList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_activated_1, titles));
drawerList.setOnItemClickListener(new DrawerItemClickListener());
//Display the correct fragment.
if (savedInstanceState != null) {
currentPosition = savedInstanceState.getInt("position");
setActionBarTitle(currentPosition);
} else {
selectItem(0);
}
//Create the ActionBarDrawerToggle
drawerToggle = new ActionBarDrawerToggle(this, drawerLayout,
R.string.open_drawer, R.string.close_drawer) {
//Called when a drawer has settled in a completely closed state
#Override
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
invalidateOptionsMenu();
}
//Called when a drawer has settled in a completely open state.
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
invalidateOptionsMenu();
}
};
drawerLayout.addDrawerListener(drawerToggle);
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
getFragmentManager().addOnBackStackChangedListener(
new FragmentManager.OnBackStackChangedListener() {
public void onBackStackChanged() {
FragmentManager fragMan = getFragmentManager();
Fragment fragment = fragMan.findFragmentByTag("visible_fragment");
if (fragment instanceof TopFragment) {
currentPosition = 0;
}
if (fragment instanceof LifestyleFragment) {
currentPosition = 1;
}
if (fragment instanceof EntFragment) {
currentPosition = 2;
}
if (fragment instanceof NewsFragment) {
currentPosition = 3;
}
if (fragment instanceof FeaturesFragment) {
currentPosition = 4;
}
if (fragment instanceof AcademicsFragment) {
currentPosition = 5;
}
if (fragment instanceof FashionFragment) {
currentPosition = 6;
}
setActionBarTitle(currentPosition);
drawerList.setItemChecked(currentPosition, true);
}
}
);
}
private void selectItem(int position) {
// update the main content by replacing fragments
currentPosition = position;
Fragment fragment;
switch(position) {
case 1:
fragment = new LifestyleFragment();
break;
case 2:
fragment = new EntFragment();
break;
case 3:
fragment = new NewsFragment();
break;
case 4:
fragment = new FeaturesFragment();
break;
case 5:
fragment = new AcademicsFragment();
break;
case 6:
fragment = new FashionFragment();
break;
default:
fragment = new TopFragment();
}
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.fragment_container, fragment, "visible_fragment");
ft.addToBackStack(null);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
//Set the action bar title
setActionBarTitle(position);
//Close the drawer
drawerLayout.closeDrawer(drawerList);
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
// If the drawer is open, hide action items related to the content view
boolean drawerOpen = drawerLayout.isDrawerOpen(drawerList);
menu.findItem(R.id.action_share).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
drawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
drawerToggle.onConfigurationChanged(newConfig);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("position", currentPosition);
}
private void setActionBarTitle(int position) {
String title="";
titles=getResources().getStringArray(R.array.titles);
if (position == 0){
title = getResources().getString(R.string.app_name);
} else {
title = titles[position];
}
getActionBar().setTitle(title);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
MenuItem menuItem = menu.findItem(R.id.action_share);
shareActionProvider = (ShareActionProvider) menuItem.getActionProvider();
setIntent("This is example text");
return super.onCreateOptionsMenu(menu);
}
private void setIntent(String text) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_TEXT, text);
shareActionProvider.setShareIntent(intent);
}
}
RssItem.java:
package com.hfad.teen10magazine;
public class RssItem {
private final String title;
private final String link;
private final String pubDate;
public RssItem(String title, String link, String pubDate) {
this.title = title;
this.link = link;
this.pubDate = pubDate;
}
public String getTitle() {
return title;
}
public String getLink() {
return link;
}
public String getDate() {
return pubDate;
}
}
RssParser.java:
package com.hfad.teen10magazine;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.util.Xml;
public class RssParser {
// We don't use namespaces
private final String ns = null;
public List<RssItem> parse(InputStream inputStream) throws XmlPullParserException, IOException {
try {
XmlPullParser parser = Xml.newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
parser.setInput(inputStream, null);
parser.nextTag();
return readFeed(parser);
} finally {
inputStream.close();
}
}
private List<RssItem> readFeed(XmlPullParser parser) throws XmlPullParserException, IOException {
parser.require(XmlPullParser.START_TAG, null, "rss");
String title = null;
String link = null;
String pubDate = null;
List<RssItem> items = new ArrayList<RssItem>();
while (parser.next() != XmlPullParser.END_DOCUMENT) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
String name = parser.getName();
if (name.equals("title")) {
title = readTitle(parser);
} else if (name.equals("link")) {
link = readLink(parser);
} else if (name.equals("pubDate")) {
pubDate = readDate(parser);
}
if (title != null && link != null && pubDate != null) {
RssItem item = new RssItem(title, link, pubDate);
items.add(item);
title = null;
link = null;
pubDate = null;
}
}
return items;
}
private String readLink(XmlPullParser parser) throws XmlPullParserException, IOException {
parser.require(XmlPullParser.START_TAG, ns, "link");
String link = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "link");
return link;
}
private String readTitle(XmlPullParser parser) throws XmlPullParserException, IOException {
parser.require(XmlPullParser.START_TAG, ns, "title");
String title = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "title");
return title;
}
private String readDate(XmlPullParser parser) throws XmlPullParserException, IOException {
parser.require(XmlPullParser.START_TAG, ns, "pubDate");
String pubDate = readText(parser);
parser.require(XmlPullParser.END_TAG, ns, "pubDate");
return pubDate;
}
// For the tags title and link, extract their text values.
private String readText(XmlPullParser parser) throws IOException, XmlPullParserException {
String result = "";
if (parser.next() == XmlPullParser.TEXT) {
result = parser.getText();
parser.nextTag();
}
return result;
}
}
Constants.java:
package com.hfad.teen10magazine;
public class Constants {
public static final String TAG = "Teen10MagazineApp";
}
RssAdapter.java:
package com.hfad.teen10magazine;
import java.util.List;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class RssAdapter extends BaseAdapter {
/* puts the RSS items in a list */
private final List<RssItem> items;
private final Context context;
public RssAdapter(Context context, List<RssItem> items) {
this.items = items;
this.context = context;
}
#Override
public int getCount() {
return items.size();
}
#Override
public Object getItem(int position) {
return items.get(position);
}
#Override
public long getItemId(int id) {
return id;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = View.inflate(context, R.layout.rss_item, null);
holder = new ViewHolder();
holder.itemTitle = (TextView) convertView.findViewById(R.id.itemTitle);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.itemTitle.setText(items.get(position).getTitle());
return convertView;
}
static class ViewHolder {
TextView itemTitle;
}
}
Along with the main codes, for the sake of time, I will post the codes of one category that works (the fragment it is placed in and the RssService used to get it) and the codes of one that doesn't work. If you need more information or codes, please contact me and I will be happy to provide information:
LifeStyleFragment.java (Works):
package com.hfad.teen10magazine;
import android.app.Fragment;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.ResultReceiver;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.Toast;
import java.util.List;
public class LifestyleFragment extends Fragment implements AdapterView.OnItemClickListener {
private ProgressBar progressBar;
private ListView listView;
private View view;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (view == null) {
view = inflater.inflate(R.layout.fragment_layout, container, false);
progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
listView = (ListView) view.findViewById(R.id.listView);
listView.setOnItemClickListener(this);
startService();
} else {
// If we are returning from a configuration change:
// "view" is still attached to the previous view hierarchy
// so we need to remove it and re-attach it to the current one
ViewGroup parent = (ViewGroup) view.getParent();
parent.removeView(view);
}
return view;
}
private void startService() {
Intent intent = new Intent(getActivity(), RssService_Lifestyle.class);
intent.putExtra(RssService_Lifestyle.RECEIVER, resultReceiver);
getActivity().startService(intent);
}
private final ResultReceiver resultReceiver = new ResultReceiver(new Handler()) {
#SuppressWarnings("unchecked")
#Override
protected void onReceiveResult(int resultCode, Bundle resultData) {
List<RssItem> items = (List<RssItem>) resultData.getSerializable(RssService_Lifestyle.ITEMS);
if (items != null) {
RssAdapter adapter = new RssAdapter(getActivity(), items);
listView.setAdapter(adapter);
} else {
Toast.makeText(getActivity(), "An error occurred while downloading the rss feed.",
Toast.LENGTH_LONG).show();
}
progressBar.setVisibility(View.GONE);
listView.setVisibility(View.VISIBLE);
};
};
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
RssAdapter adapter = (RssAdapter) parent.getAdapter();
RssItem item = (RssItem) adapter.getItem(position);
Uri uri = Uri.parse(item.getLink());
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}
}
RssService_Lifestyle.java:
package com.hfad.teen10magazine;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.net.URL;
import java.util.List;
import org.xmlpull.v1.XmlPullParserException;
import android.app.IntentService;
import android.content.Intent;
import android.os.Bundle;
import android.os.ResultReceiver;
import android.util.Log;
public class RssService_Lifestyle extends IntentService {
/* parse the rss feed on lifestyle and send the list of items to LifestyleFragment */
private static final String RSS_LINK = "http://www.teen10mag.com/category/lifestyle/feed/";
public static final String ITEMS = "items";
public static final String RECEIVER = "receiver";
public RssService_Lifestyle() {
super("RssService_Lifestyle");
}
#Override
protected void onHandleIntent(Intent intent) {
Log.d(Constants.TAG, "Service started");
List<RssItem> rssItems = null;
try {
RssParser parser = new RssParser();
rssItems = parser.parse(getInputStream(RSS_LINK));
} catch (XmlPullParserException | IOException e) {
Log.w(e.getMessage(), e);
}
Bundle bundle = new Bundle();
bundle.putSerializable(ITEMS, (Serializable) rssItems);
ResultReceiver receiver = intent.getParcelableExtra(RECEIVER);
receiver.send(0, bundle);
}
public InputStream getInputStream(String link) {
try {
URL url = new URL(link);
return url.openConnection().getInputStream();
} catch (IOException e) {
Log.w(Constants.TAG, "Exception while retrieving the input stream", e);
return null;
}
}
}
AcademicsFragment.java (Doesn't work):
package com.hfad.teen10magazine;
import java.util.List;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.ResultReceiver;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.Toast;
public class AcademicsFragment extends Fragment implements AdapterView.OnItemClickListener {
private ProgressBar progressBar;
private ListView listView;
private View view;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (view == null) {
view = inflater.inflate(R.layout.fragment_layout, container, false);
progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
listView = (ListView) view.findViewById(R.id.listView);
listView.setOnItemClickListener(this);
startService();
} else {
// If we are returning from a configuration change:
// "view" is still attached to the previous view hierarchy
// so we need to remove it and re-attach it to the current one
ViewGroup parent = (ViewGroup) view.getParent();
parent.removeView(view);
}
return view;
}
private void startService() {
Intent intent = new Intent(getActivity(), RssService_Academics.class);
intent.putExtra(RssService_Academics.RECEIVER, resultReceiver);
getActivity().startService(intent);
}
private final ResultReceiver resultReceiver = new ResultReceiver(new Handler()) {
#SuppressWarnings("unchecked")
#Override
protected void onReceiveResult(int resultCode, Bundle resultData) {
List<RssItem> items = (List<RssItem>) resultData.getSerializable(RssService_Academics.ITEMS);
if (items != null) {
RssAdapter adapter = new RssAdapter(getActivity(), items);
listView.setAdapter(adapter);
} else {
Toast.makeText(getActivity(), "An error occurred while downloading the rss feed.",
Toast.LENGTH_LONG).show();
}
progressBar.setVisibility(View.GONE);
listView.setVisibility(View.VISIBLE);
}
};
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
RssAdapter adapter = (RssAdapter) parent.getAdapter();
RssItem item = (RssItem) adapter.getItem(position);
Uri uri = Uri.parse(item.getLink());
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}
}
RssService_Academics.java:
package com.hfad.teen10magazine;
import android.app.IntentService;
import android.content.Intent;
import android.os.Bundle;
import android.os.ResultReceiver;
import android.util.Log;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.net.URL;
import java.util.List;
public class RssService_Academics extends IntentService {
/* parse the rss feed on academics and send the list of items to AcademicsFragment */
private static final String RSS_LINK = "http://www.teen10mag.com/category/academics/feed/";
public static final String ITEMS = "items";
public static final String RECEIVER = "receiver";
public RssService_Academics() {
super("RssService_Academics");
}
#Override
protected void onHandleIntent(Intent intent) {
Log.d(Constants.TAG, "Service started");
List<RssItem> rssItems = null;
try {
RssParser parser = new RssParser();
rssItems = parser.parse(getInputStream(RSS_LINK));
} catch (XmlPullParserException | IOException e) {
Log.w(e.getMessage(), e);
}
Bundle bundle = new Bundle();
bundle.putSerializable(ITEMS, (Serializable) rssItems);
ResultReceiver receiver = intent.getParcelableExtra(RECEIVER);
receiver.send(0, bundle);
}
public InputStream getInputStream(String link) {
try {
URL url = new URL(link);
return url.openConnection().getInputStream();
} catch (IOException e) {
Log.w(Constants.TAG, "Exception while retrieving the input stream", e);
return null;
}
}
}
This is my first question, so I tried to be as detailed as possible. If my explanations were unreasonably lengthy, I do apologize. This is also my first time coding something this extensive, so forgive me if I seem to make amateur mistakes...
Thank you in advance for all of your help!!
[EDIT]
When I click on the category that doesn't work, the logcat turns up like this:
09-21 19:29:59.237 1541-1866/system_process W/ActivityManager: Unable to start service Intent { cmp=com.hfad.teen10magazine/.RssService_News (has extras) } U=0: not found
09-21 19:30:13.209 2808-2808/com.hfad.teen10magazine I/Choreographer: Skipped 31 frames! The application may be doing too much work on its main thread.
09-21 19:30:21.122 2808-2814/com.hfad.teen10magazine W/art: Suspending all threads took: 13.025ms`

ArrayList get method causes app to be crashed

I am inflating the menu from JSON which contain its name and id. I had written Fragment5 which is used to be calling an URL for JSON. In that url I want to call the id of the menu.
This is my code. The code is running fine if I am commenting the two line
String scat = menu_nms.get(0);
int cat = Integer.parseInt(scat);
MainActivity.java
package com.latrodealz.wowwdealz;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.ProgressDialog;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.Toast;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
import com.latrodealz.wowwdealz.adapter.SlidingMenuAdapter;
import com.latrodealz.wowwdealz.fragment.Fragment1;
import com.latrodealz.wowwdealz.fragment.Fragment2;
import com.latrodealz.wowwdealz.fragment.Fragment3;
import com.latrodealz.wowwdealz.fragment.Fragment4;
import com.latrodealz.wowwdealz.fragment.Fragment5;
import com.latrodealz.wowwdealz.model.ItemSlideMenu;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
/**
* Created by NgocTri on 10/18/2015.
*/
public class MainActivity extends AppCompatActivity {
private List<ItemSlideMenu> listSliding;
private SlidingMenuAdapter adapter;
private ListView listViewSliding;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle actionBarDrawerToggle;
//Web api url
public static final String MENU_URL = "http://69.89.31.191/~webtech6/android_wow/menu_dtls.php";
//Tag values to read from json
public static final String MENU_ID = "menu_id";
public static final String MENU_NM = "menu_nm";
//ArrayList for Storing menu ids and names
private ArrayList<String> menu_ids;
private ArrayList<String> menu_nms;
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
menu_ids = new ArrayList<>();
menu_nms = new ArrayList<>();
//Calling the getMenuData method
getMenuData();
//Init component
listViewSliding = (ListView) findViewById(R.id.lv_sliding_menu);
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
listSliding = new ArrayList<>();
//Add item for sliding list
listSliding.add(new ItemSlideMenu(R.drawable.ic_action_settings, "Home"));
adapter = new SlidingMenuAdapter(this, listSliding);
listViewSliding.setAdapter(adapter);
//Display icon to open/ close sliding list
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
//Set title
setTitle(listSliding.get(0).getTitle());
//item selected
listViewSliding.setItemChecked(0, true);
//Close menu
drawerLayout.closeDrawer(listViewSliding);
//Display fragment 1 when start
replaceFragment(0);
//Handle on item click
listViewSliding.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//Set title
setTitle(listSliding.get(position).getTitle());
//item selected
listViewSliding.setItemChecked(position, true);
//Replace fragment
replaceFragment(position);
//Close menu
drawerLayout.closeDrawer(listViewSliding);
}
});
actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.drawer_opened, R.string.drawer_closed) {
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
invalidateOptionsMenu();
}
};
drawerLayout.addDrawerListener(actionBarDrawerToggle);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
private void getMenuData() {
//Showing a progress dialog while our app fetches the data from url
final ProgressDialog loading = ProgressDialog.show(this, "Please wait...", "Fetching data...", false, false);
//Creating a json array request to get the json from our api
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(MENU_URL,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
//Dismissing the progressdialog on response
loading.dismiss();
//Displaying our grid
showMenu(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}
);
//Creating a request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding our request to the queue
requestQueue.add(jsonArrayRequest);
}
private void showMenu(JSONArray jsonArray) {
//Looping through all the elements of json array
for (int i = 0; i < jsonArray.length(); i++) {
//Creating a json object of the current index
JSONObject obj = null;
try {
//getting json object from current index
obj = jsonArray.getJSONObject(i);
//getting menuid and menuname from json object
menu_ids.add(obj.getString(MENU_ID));
menu_nms.add(obj.getString(MENU_NM));
} catch (JSONException e) {
e.printStackTrace();
}
}
//Add item for sliding list
for (int i = 0; i < menu_ids.size(); i++) {
listSliding.add(new ItemSlideMenu(R.drawable.ic_action_about, menu_nms.get(i)));
}
adapter = new SlidingMenuAdapter(this, listSliding);
listViewSliding.setAdapter(adapter);
//Add item for sliding list
listSliding.add(new ItemSlideMenu(R.drawable.ic_action_settings, "MY CART"));
listSliding.add(new ItemSlideMenu(R.drawable.ic_action_settings, "MY ACCOUNT"));
listSliding.add(new ItemSlideMenu(R.drawable.ic_action_settings, "MY ORDERS"));
adapter = new SlidingMenuAdapter(this, listSliding);
listViewSliding.setAdapter(adapter);
//Display Array List
// Toast.makeText(getBaseContext(), menu_ids + "", Toast.LENGTH_LONG).show();
// Toast.makeText(getBaseContext(), menu_nms + "", Toast.LENGTH_LONG).show();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId()) {
case R.id.action_search:
// User chose the "Settings" item, show the app settings UI...
Intent intent = new Intent(MainActivity.this, SearchableActivity.class);
startActivityForResult(intent, 0);
//Toast.makeText(this, "You have selected Search Search Menu", Toast.LENGTH_SHORT).show();
return true;
case R.id.action_kart:
// User chose the "Favorite" action, mark the current item
// as a favorite...
Toast.makeText(this, "You have selected Search KART Menu", Toast.LENGTH_SHORT).show();
return true;
case R.id.action_notifications:
// User chose the "Favorite" action, mark the current item
// as a favorite...
Toast.makeText(this, "You have selected Search Notifications Menu", Toast.LENGTH_SHORT).show();
return true;
default:
// If we got here, the user's action was not recognized.
// Invoke the superclass to handle it.
return super.onOptionsItemSelected(item);
}
//return super.onOptionsItemSelected(item);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
actionBarDrawerToggle.syncState();
}
/**
* Called when the user clicks the Search Menu
* public void callSearchActivity(View view) {
* Intent intent = new Intent(this, SearchActivity.class);
* startActivity(intent);
* }
*/
//Create method replace fragment
private void replaceFragment(int pos) {
Fragment fragment = null;
int menu_size = menu_ids.size();
String scat = menu_nms.get(0);
int cat = Integer.parseInt(scat);
if (pos == 0) {
fragment = new Fragment1();
} else if (pos > 0 && pos <= menu_size) {
SharedPreferences sharePref = getSharedPreferences("menu_dtls", Context.MODE_PRIVATE);
sharePref.edit().remove("menu_id").commit();
SharedPreferences.Editor editor = sharePref.edit();
editor.putInt("menu_id", pos);
editor.apply();
fragment = new Fragment5();
} else if (pos == (menu_size + 1)) {
fragment = new Fragment2();
} else if (pos == (menu_size + 2)) {
fragment = new Fragment3();
} else if (pos == (menu_size + 3)) {
fragment = new Fragment4();
} else {
fragment = new Fragment1();
}
if (null != fragment) {
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.main_content, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
}
#Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Main Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("android-app://com.latrodealz.wowwdealz/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
#Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Main Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app deep link URI is correct.
Uri.parse("android-app://com.latrodealz.wowwdealz/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
}
Fragment5.java
package com.latrodealz.wowwdealz.fragment;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ListView;
import com.latrodealz.wowwdealz.R;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
public class Fragment5 extends Fragment {
JSONObject jsonobject;
JSONArray jsonarray;
ListView listview;
ListViewAdapter adapter;
ProgressDialog mProgressDialog;
ArrayList<HashMap<String, String>> arraylist;
static String RANK = "rank";
static String COUNTRY = "country";
static String POPULATION = "population";
static String FLAG = "flag";
public Fragment5() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment5, container, false);
//TextView menu_id = (TextView)rootView.findViewById(R.id.textid);
//SharedPreferences sharePref = this.getActivity().getSharedPreferences("menu_dtls", Context.MODE_PRIVATE);
//int menuId = sharePref.getInt("menu_id", 0);
// menu_id.setText(String.valueOf(menuId));
ImageView purple=(ImageView)rootView.findViewById(R.id.gridicon);
purple.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
getFragmentManager()
.beginTransaction()
.replace(R.id.main_content, new Fragment4())
.commit();
}
});
new DownloadJSON().execute();
return rootView;
}
// DownloadJSON AsyncTask
private class DownloadJSON extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(getActivity());
// Set progressdialog title
mProgressDialog.setTitle("Fetching data...");
// Set progressdialog message
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
// Show progressdialog
mProgressDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
// Create an array
SharedPreferences sharePref = getActivity().getSharedPreferences("menu_dtls", Context.MODE_PRIVATE);
int menuId = sharePref.getInt("menu_id", 0);
arraylist = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
jsonobject = JSONfunctions
.getJSONfromURL("http://69.89.31.191/~webtech6/android_wow/load.php?catId="+menuId);
try {
// Locate the array name in JSON
jsonarray = jsonobject.getJSONArray("worldpopulation");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
map.put("rank", jsonobject.getString("rank"));
map.put("country", jsonobject.getString("country"));
map.put("population", jsonobject.getString("population"));
map.put("flag", jsonobject.getString("flag"));
// Set the JSON Objects into the array
//Toast.makeText(getActivity().getBaseContext(), map + "", Toast.LENGTH_LONG).show();
arraylist.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void args) {
// Locate the listview in listview_main.xml
listview = (ListView) getActivity().findViewById(R.id.listview);
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(getActivity(), arraylist);
// Set the adapter to the ListView
listview.setAdapter(adapter);
// Close the progressdialog
mProgressDialog.dismiss();
}
}
}

Perhaps you get exception during JSON parsing. You may surround Integer.parseInt(scat); with try- catch catching ParsingException if Json has no such a field.
But more neat solution is to use GSON with Retrofit, so you can automatically parse you response to java objects, created by jsonschema2pojo.com