title: Multiple Service calling by using Volley
body: <p>I have a MainActivity where the Swipeable Tabs are created and from there two fragments are called. I have 2 webservice for Fragment A and Fragment B where I have to parse data coming from server. I am using volley. When I am in the first fragment; both the webservice are being called and the data are not loaded for the first time.</p>
  
  <p>But in the Second time it is showing correctly but it should be like this that when I am in Fragment A the service of the Fragment A should be called and when I am in Fragment B the service of the Fragment B should be called. I am attaching the code snippets.</p>
  
  <p><strong>MainActivity.java</strong></p>
  
  <pre><code>public class MainActivity extends AppCompatActivity {
      DrawerLayout mDrawerLayout;
      NavigationView mNavigationView;
      FragmentManager mFragmentManager;
      FragmentTransaction mFragmentTransaction;
  
      int status = 0 ;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          /**
           *Setup the DrawerLayout and NavigationView
           */
  
          mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
          mNavigationView = (NavigationView) findViewById(R.id.shitstuff);
          android.support.v7.widget.Toolbar toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.toolbar);
          // Show menu icon
  
          setSupportActionBar(toolbar);
          getSupportActionBar().setDisplayShowHomeEnabled(true);
  
          /**
           * Lets inflate the very first fragment
           * Here , we are inflating the NewsFragment as the first Fragment
           */
  
          mFragmentManager = getSupportFragmentManager();
          mFragmentTransaction = mFragmentManager.beginTransaction();
          mFragmentTransaction.replace(R.id.containerView, new NewsFragment()).commit();
  
  //        mNavigationView.setBackgroundColor(Color.parseColor("#CFCFCF"));
          /**
           * Setup click events on the Navigation View Items.
           */
  
          mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
              @Override
              public boolean onNavigationItemSelected(MenuItem menuItem) {
                  mDrawerLayout.closeDrawers();
  
  
                  if (menuItem.getItemId() == R.id.nav_item_sent) {
                      FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
                      fragmentTransaction.replace(R.id.containerView, new SportsFragment()).commit();
  
                      status = 1;
  
                      if (status == 1){
  
                      }
  
                  }
  
                  if (menuItem.getItemId() == R.id.nav_item_inbox) {
                      FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                      xfragmentTransaction.replace(R.id.containerView, new NewsFragment()).commit();
                  }
  
                  if (menuItem.getItemId() == R.id.nav_item_sent){
                      FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                      xfragmentTransaction.replace(R.id.containerView, new VideosFragment()).commit();
                  }
  
                  if (menuItem.getItemId() == R.id.nav_item_draft) {
                      FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                      xfragmentTransaction.replace(R.id.containerView, new OpinionFragment()).commit();
                  }
  
                  if (menuItem.getItemId() == R.id.nav_item_sports) {
                      FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                      xfragmentTransaction.replace(R.id.containerView, new SportsFragment()).commit();
                  }
  
                  if (menuItem.getItemId() == R.id.nav_item_weather) {
                      FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
                      xfragmentTransaction.replace(R.id.containerView, new NewsFragment()).commit();
                  }
  
                  return false;
              }
  
          });
  
          /**
           * Setup Drawer Toggle of the Toolbar
           */
  
  
  
      ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, toolbar, R.string.app_name,
              R.string.app_name);
  
      mDrawerLayout.setDrawerListener(mDrawerToggle);
  
      mDrawerToggle.syncState();
  
  }
  
      @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);
  
          return true;
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          switch (item.getItemId()) {
              case R.id.action_about_us:
                  Intent intent = new Intent(MainActivity.this, AboutUs.class);
                  startActivity(intent);
                  return true;
  
              case R.id.action_terms_of_use:
                  Intent intent_two = new Intent(MainActivity.this, TermsUse.class);
                  startActivity(intent_two);
                  return true;
  
              case R.id.action_privacy_policy:
                  Intent intent_three = new Intent(MainActivity.this, PrivacyPolicy.class);
                  startActivity(intent_three);
                  return true;
  
              case R.id.action_contact_us:
                  Intent intent_four = new Intent(MainActivity.this, ContactUs.class);
                  startActivity(intent_four);
  
              case R.id.search:
  //                hidetext();
                  Toast.makeText(MainActivity.this, "In the development Phase... Thank You...", Toast.LENGTH_SHORT).show();
                  return true;
              default:
                  return super.onOptionsItemSelected(item);
          }
      }
  
  //    private void hidetext() {
  //
  //        Intent i = new Intent(MainActivity.this, SearchResultActivity.class);
  //        startActivity(i);
  //    }
  }
  </code></pre>
  
  <p><strong>TopNewsFragment</strong></p>
  
  <pre><code>public class TopNewsFragment extends Fragment {
  
      // Log tag
      private static final String TAG = MainActivity.class.getSimpleName();
  
      private static final String url = "http://sikkimexpress.itstunner.com/api/homenewslist/topnews";
      private ProgressDialog pDialog;
      private List&lt;Movie&gt; movieList = new ArrayList&lt;Movie&gt;();
      Movie movie;
      private ListView listView;
      private CustomListAdapter adapter;
      String imageURL = "", title = "", description = "";
      public static final String KEY_ID = "news_id";
      public static final String KEY_HEADURL = "news_url";
      public static final String KEY_DETAILS = "news_details";
      public static final String KEY_TITLE = "news_title";
  
      RequestQueue requestQueue;
  
      public TopNewsFragment() {
          // Required empty public constructor
      }
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
      }
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                               Bundle savedInstanceState) {
          final View rootView = inflater.inflate(R.layout.fragment_news, container, false);
  
          listView = (ListView) rootView.findViewById(R.id.list);
  
          listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  
              @Override
              public void onItemClick(AdapterView&lt;?&gt; adapterView, View view, int Position,
                                      long offset) {
                  // TODO Auto-generated method stub
                  Movie item = (Movie) adapter.getItem(Position);
                  Intent intent = new Intent(rootView.getContext(), DetailsPage.class);
                  intent.putExtra(KEY_ID, item.getNewsId());
                  intent.putExtra(KEY_HEADURL, item.getThumbnailUrl());
                  intent.putExtra(KEY_TITLE, item.getTitle());
                  intent.putExtra(KEY_DETAILS, item.getDescription());
  
                  startActivity(intent);
  
  
              }
          });
  
  //        requestQueue = Volley.newRequestQueue(getActivity());
          adapter = new CustomListAdapter(getActivity(), movieList);
          listView.setAdapter(adapter);
  
          pDialog = new ProgressDialog(getActivity());
          pDialog.setMessage("Loading...Please Wait...");
          pDialog.setCancelable(false);
          pDialog.show();
  
          Volley.newRequestQueue(getActivity()).add(new JsonObjectRequest(Request.Method.GET, url, new Response.Listener&lt;JSONObject&gt;() {
               @Override
               public void onResponse(JSONObject response) {
                   hidePDialog();
                   try {
                       JSONArray jsonArray = response.getJSONArray("HomeNews");
  
  //                    if (jsonArray.length() == 0) {
  //                        new AlertDialog.Builder(getActivity())
  //                                .setTitle("Alert")
  //                                .setMessage("No Items found...")
  //                                .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
  //                                    public void onClick(DialogInterface dialog, int which) {
  //                                        // continue with delete
  //                                    }
  //                                })
  //                                .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
  //                                    public void onClick(DialogInterface dialog, int which) {
  //                                        // do nothing
  //                                    }
  //                                })
  //                                .setIcon(android.R.drawable.ic_dialog_alert)
  //                                .show();
  //                    }
  
                       for (int i = 0; i &lt; jsonArray.length(); i++) {
                           JSONObject homenews = jsonArray.getJSONObject(i);
                           Movie movie = new Movie();
                           movie.setNewsId(homenews.getString("NewsId"));
                           movie.setDateTime(homenews.getString("DateTime"));
                           movie.setNewsType(homenews.getString("NewsType"));
                           movie.setTitle(homenews.getString("Title"));
                           title = movie.setTitle(homenews.getString("Title"));
                           description = movie.setDescription(homenews.getString("Description"));
                           movie.setDescription(homenews.getString("Description"));
                           imageURL = movie.setThumbnailUrl(homenews.getString("MainImageThumbnail"));
                           movie.setThumbnailUrl(homenews.getString("MainImageThumbnail"));
  
                           movieList.add(movie);
  
                           System.out.println("Setting up in ListView");
  //                        System.out.println("Result:- " + newsId + " " + dateTime + " " + newsType + " " + title + " " + description + " " + mainImageURL);
                       }
                   } catch (JSONException e) {
                       e.printStackTrace();
                   }
                   adapter.notifyDataSetChanged();
               }
           }, new Response.ErrorListener() {
               @Override
               public void onErrorResponse(VolleyError error) {
  //                new AlertDialog.Builder(getActivity())
  //                        .setTitle("No Connectivity ")
  //                        .setMessage("Please check your internet connectivity!")
  //                        .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
  //                            public void onClick(DialogInterface dialog, int which) {
  //                                // continue with delete
  //                            }
  //                        })
  //                                //.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
  //                                //public void onClick(DialogInterface dialog, int which) {
  //                                // do nothing
  //                                //}
  //                                //})
  //                        .setIcon(android.R.drawable.ic_dialog_alert)
  //                        .show();
                   hidePDialog();
               }
           }));
  
  //        AppController.getInstance().addToRequestQueue(jsonObjectRequest);
  //        requestQueue.add(jsonObjectRequest);
          return rootView;
      }
  
      @Override
      public void onAttach(Activity activity) {
          super.onAttach(activity);
      }
  
      @Override
      public void onDetach() {
          super.onDetach();
      }
  
      private void hidePDialog() {
          if (pDialog != null) {
              pDialog.dismiss();
              pDialog = null;
          }
      }
  }
  </code></pre>
  
  <p><strong>LatestNewsFragment.java</strong></p>
  
  <pre><code>public class LatestNewsFragment extends Fragment {
  
      // Log tag
      private static final String TAG = MainActivity.class.getSimpleName();
  
      private static final String url = "http://sikkimexpress.itstunner.com/api/homenewslist/latest";
      private ProgressDialog pDialog;
      private List&lt;Movie&gt; movieList = new ArrayList&lt;Movie&gt;();
      private ListView listView;
      private CustomListAdapter adapter;
      // contacts JSONArray
      private JSONArray users = null;
      RequestQueue requestQueue;
      public static final String KEY_HEADURL="news_url";
      public static final String KEY_DETAILS="news_details";
      public static final String KEY_TITLE = "news_title";
  
      public LatestNewsFragment() {
          // Required empty public constructor
      }
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
      }
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                               Bundle savedInstanceState) {
          final View rootView = inflater.inflate(R.layout.fragment_news, container, false);
  
          listView = (ListView) rootView.findViewById(R.id.list);
  
  //        requestQueue = Volley.newRequestQueue(getActivity());
          adapter = new CustomListAdapter(getActivity(), movieList);
          listView.setAdapter(adapter);
  
          listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  
              @Override
              public void onItemClick(AdapterView&lt;?&gt; adapterView, View view, int Position,
                                      long offset) {
                  // TODO Auto-generated method stub
                  Movie item = (Movie) adapter.getItem(Position);
                  Intent intent = new Intent(rootView.getContext(), DetailsPage.class);
  //                intent.putExtra("URL", movie.getThumbnailUrl());
  //                intent.putExtra("title", movie.getTitle());
  //                intent.putExtra("description", movie.getDescription());
  
                  intent.putExtra(KEY_HEADURL, item.getThumbnailUrl());
                  intent.putExtra(KEY_TITLE, item.getTitle());
                  intent.putExtra(KEY_DETAILS, item.getDescription());
  
                  startActivity(intent);
  
  
              }
          });
  
          pDialog = new ProgressDialog(getActivity());
          // Showing progress dialog before making http request
          pDialog.setMessage("Loading...Please Wait...");
          pDialog.setCancelable(false);
          pDialog.show();
  
          Volley.newRequestQueue(getActivity()).add(new JsonObjectRequest(Request.Method.GET, url, new Response.Listener&lt;JSONObject&gt;() {
  //            JsonObjectRequest jsonObjectRequest =
  
              @Override
              public void onResponse(JSONObject response) {
                  try {
                      hidePDialog();
  
                      JSONArray jsonArray = response.getJSONArray("HomeNews");
  
  //                    if (jsonArray.length() == 0){
  //                        new AlertDialog.Builder(getActivity())
  //                                .setTitle("Alert")
  //                                .setMessage("No Items found...")
  //                                .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
  //                                    public void onClick(DialogInterface dialog, int which) {
  //                                        // continue with delete
  //                                    }
  //                                })
  //                                .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
  //                                    public void onClick(DialogInterface dialog, int which) {
  //                                        // do nothing
  //                                    }
  //                                })
  //                                .setIcon(android.R.drawable.ic_dialog_alert)
  //                                .show();
  //                    }
  
                      for (int i = 0; i &lt; jsonArray.length(); i++) {
                          JSONObject homenews = jsonArray.getJSONObject(i);
                          Movie movie = new Movie();
                          movie.setNewsId(homenews.getString("NewsId"));
                          movie.setDateTime(homenews.getString("DateTime"));
                          movie.setNewsType(homenews.getString("NewsType"));
                          movie.setTitle(homenews.getString("Title"));
                          movie.setDescription(homenews.getString("Description"));
                          movie.setThumbnailUrl(homenews.getString("MainImageThumbnail"));
  
                          movieList.add(movie);
                          System.out.println("Setting up in ListView");
                      }
                  } catch (JSONException e) {
                      e.printStackTrace();
                  }
                  adapter.notifyDataSetChanged();
              }
          },
  
                  new Response.ErrorListener() {
                      @Override
                      public void onErrorResponse(VolleyError error) {
  //                        new AlertDialog.Builder(getActivity())
  //                                .setTitle("No Connectivity ")
  //                                .setMessage("Please check your internet connectivity!")
  //                                .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
  //                                    public void onClick(DialogInterface dialog, int which) {
  //                                        // continue with delete
  //                                    }
  //                                })
  //                                        //.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
  //                                        //public void onClick(DialogInterface dialog, int which) {
  //                                        // do nothing
  //                                        //}
  //                                        //})
  //                                .setIcon(android.R.drawable.ic_dialog_alert)
  //                                .show();
                          hidePDialog();
                      }
                  }));
  
  //        AppController.getInstance().addToRequestQueue(jsonObjectRequest);
  //        requestQueue.add(jsonObjectRequest);
          return rootView;
      }
  
      @Override
      public void onAttach(Activity activity) {
          super.onAttach(activity);
      }
  
      @Override
      public void onDetach() {
          super.onDetach();
      }
  
      private void hidePDialog() {
          if (pDialog != null) {
              pDialog.dismiss();
              pDialog = null;
          }
      }
  }
  </code></pre>