java.util.ArrayList cannot be cast to
Question
I'm new in android and testing my skills in different test applications. Now I'm trying to get data from Json url and create from Json's object favorite list. Gradle is finished without any problems, but every time when my app starts, it crashes with next error:
Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
I used as tutorial next resources:
for shared prefs: http://androidopentutorials.com/android-how-to-store-list-of-values-in-sharedpreferences/
for Json parser: http://www.androidhive.info/2014/09/android-json-parsing-using-volley/
This is my code error and activity where is the error:
06-17 17:05:14.124 10249-10249/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.boom.kayakapp, PID: 10249
java.lang.ClassCastException: java.util.ArrayList cannot be cast to com.boom.kayakapp.model.Airlines
at com.boom.kayakapp.adapters.AirlinesListAdapter.getView(AirlinesListAdapter.java:102)
at android.widget.AbsListView.obtainView(AbsListView.java:2347)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1270)
at android.widget.ListView.onMeasure(ListView.java:1182)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.support.v7.internal.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:124)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:444)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2615)
at android.view.View.measure(View.java:17547)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
06-17 17:05:14.153 932-932/? E/EGL_emulation﹕ tid 932: eglCreateSyncKHR(1237): error 0x3004 (EGL_BAD_ATTRIBUTE)
06-17 17:05:16.543 1233-1266/system_process E/InputDispatcher﹕ channel '26e93136 com.boom.kayakapp/com.boom.kayakapp.activities.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
06-17 17:05:38.432 10506-10506/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
06-17 17:05:38.432 10506-10506/? E/android.os.Debug﹕ failed to load memtrack module: -2
06-17 17:05:39.009 10523-10523/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
06-17 17:05:39.009 10523-10523/? E/android.os.Debug﹕ failed to load memtrack module: -2
06-17 17:05:51.855 10533-10533/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.boom.kayakapp, PID: 10533
java.lang.ClassCastException: java.util.ArrayList cannot be cast to com.boom.kayakapp.model.Airlines
at com.boom.kayakapp.adapters.AirlinesListAdapter.getView(AirlinesListAdapter.java:102)
at android.widget.AbsListView.obtainView(AbsListView.java:2347)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1270)
at android.widget.ListView.onMeasure(ListView.java:1182)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.support.v7.internal.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:124)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:444)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17547)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2615)
at android.view.View.measure(View.java:17547)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
06-17 17:05:51.887 932-932/? E/EGL_emulation﹕ tid 932: eglCreateSyncKHR(1237): error 0x3004 (EGL_BAD_ATTRIBUTE)
06-17 17:06:51.514 11046-11046/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
06-17 17:06:51.514 11046-11046/? E/android.os.Debug﹕ failed to load memtrack module: -2
06-17 17:06:52.206 11063-11063/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
06-17 17:06:52.207 11063-11063/? E/android.os.Debug﹕ failed to load memtrack module: -2
06-17 17:07:03.184 932-932/? E/EGL_emulation﹕ tid 932: eglCreateSyncKHR(1237): error 0x3004 (EGL_BAD_ATTRIBUTE)
06-17 17:07:06.919 1233-1266/system_process E/InputDispatcher﹕ channel '3bd6cfb7 com.boom.kayakapp/com.boom.kayakapp.activities.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
AirlinesListAdapter:
package com.boom.kayakapp.adapters;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.NetworkImageView;
import com.boom.kayakapp.R;
import com.boom.kayakapp.controllers.AppController;
import com.boom.kayakapp.model.Airlines;
import com.boom.kayakapp.util.SharedPreference;
import java.util.ArrayList;
import java.util.List;
public class AirlinesListAdapter extends ArrayAdapter<Airlines> {
private Activity activity;
private List<Airlines> favorites;
private LayoutInflater inflater;
SharedPreference sharedPreference;
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
public AirlinesListAdapter(Activity activity, List<Airlines> favorites) {
super(activity, R.layout.list_item, favorites);
this.activity = activity;
if(favorites == null)
favorites = new ArrayList<>();
else
this.favorites = favorites;
sharedPreference = new SharedPreference();
}
private class ViewHolder {
ImageView favoriteImg;
}
@Override
public int getCount() {
return favorites.size();
}
@Override
public Airlines getItem(int location) {
return favorites.get(location);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (inflater == null)
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
if (imageLoader == null)
imageLoader = AppController.getInstance().getImageLoader();
NetworkImageView logoURL = (NetworkImageView) convertView
.findViewById(R.id.logoURL);
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView phone = (TextView) convertView.findViewById(R.id.phone);
TextView site = (TextView) convertView.findViewById(R.id.site);
TextView code = (TextView) convertView.findViewById(R.id.code);
holder.favoriteImg = (ImageView) convertView
.findViewById(R.id.favorite_button);
// getting airlines data for the row
Airlines m = favorites.get(position);
// thumbnail image
logoURL.setImageUrl(m.getLogoURL(), imageLoader);
// name
name.setText(m.getName());
// phone
phone.setText("Phone: " + String.valueOf(m.getPhone()));
// site
site.setText("Web: " + String.valueOf(m.getSite()));
// release code
code.setText(String.valueOf(m.getCode()));
/*If a product exists in shared preferences then set heart_red drawable
* and set a tag*/
if (checkFavoriteItem((Airlines) favorites)) {
holder.favoriteImg.setImageResource(R.drawable.heart_red);
holder.favoriteImg.setTag("red");
} else {
holder.favoriteImg.setImageResource(R.drawable.heart_grey);
holder.favoriteImg.setTag("grey");
}
return convertView;
}
/*Checks whether a particular product exists in SharedPreferences*/
public boolean checkFavoriteItem(Airlines checkAirlines) {
boolean check = false;
// List<Airlines> favorites = sharedPreference.getFavorites(activity);
if (favorites != null) {
for (Airlines product : favorites) {
if (product.equals(checkAirlines)) {
check = true;
break;
}
}
}
return check;
}
@Override
public void add(Airlines airlines) {
super.add(airlines);
favorites.add(airlines);
notifyDataSetChanged();
}
@Override
public void remove(Airlines airlines) {
super.remove(airlines);
favorites.remove(airlines);
notifyDataSetChanged();
}
}
AirlineListFragment:
package com.boom.kayakapp.fragment;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;
import com.boom.kayakapp.R;
import com.boom.kayakapp.adapters.AirlinesListAdapter;
import com.boom.kayakapp.model.Airlines;
import com.boom.kayakapp.util.SharedPreference;
import java.util.ArrayList;
import java.util.List;
public class AirlinesListFragment extends Fragment implements OnItemLongClickListener, AdapterView.OnItemClickListener {
public static final String ARG_ITEM_ID = "airlines_list";
Activity activity;
ListView airlinesListView;
List<Airlines> airlines;
AirlinesListAdapter airlinesListAdapter;
public AirlinesListFragment() {
airlines = new ArrayList<>();
}
SharedPreference sharedPreference;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity = getActivity();
sharedPreference = new SharedPreference();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_airlines_list, container,
false);
findViewsById(view);
airlinesListAdapter = new AirlinesListAdapter(activity, airlines);
airlinesListView.setAdapter(airlinesListAdapter);
airlinesListView.setOnItemClickListener(this);
airlinesListView.setOnItemLongClickListener(this);
return view;
}
private void findViewsById(View view) {
airlinesListView = (ListView) view.findViewById(R.id.list_airlines);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Airlines airlines = (Airlines) parent.getItemAtPosition(position);
Toast.makeText(activity, airlines.toString(), Toast.LENGTH_LONG).show();
}
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View view,
int position, long arg3) {
ImageView button = (ImageView) view.findViewById(R.id.favorite_button);
String tag = button.getTag().toString();
if (tag.equalsIgnoreCase("grey")) {
sharedPreference.addFavorite(activity, airlines.get(position));
Toast.makeText(activity,
activity.getResources().getString(R.string.add_favr),
Toast.LENGTH_SHORT).show();
button.setTag("red");
button.setImageResource(R.drawable.heart_red);
} else {
sharedPreference.removeFavorite(activity, airlines.get(position));
button.setTag("grey");
button.setImageResource(R.drawable.heart_grey);
Toast.makeText(activity,
activity.getResources().getString(R.string.remove_favr),
Toast.LENGTH_SHORT).show();
}
return true;
}
@Override
public void onResume() {
getActivity().setTitle(R.string.app_name);
getActivity().getActionBar().setTitle(R.string.app_name);
super.onResume();
}
}
MainActivity:
package com.boom.kayakapp.activities;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.JsonArrayRequest;
import com.boom.kayakapp.R;
import com.boom.kayakapp.adapters.AirlinesListAdapter;
import com.boom.kayakapp.controllers.AppController;
import com.boom.kayakapp.fragment.AirlinesListFragment;
import com.boom.kayakapp.fragment.FavoriteListFragment;
import com.boom.kayakapp.model.Airlines;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends ActionBarActivity {
private Fragment contentFragment;
AirlinesListFragment airlinesListFragment;
FavoriteListFragment favoriteListFragment;
// JSON Node names
public static final String TAG_NAME = "name";
public static final String TAG_PHONE = "phone";
public static final String TAG_SITE = "site";
public static final String TAG_LOGO = "logoURL";
public static final String TAG_CODE = "code";
// Log tag
private static final String TAG = MainActivity.class.getSimpleName();
// Airlines json url
private static final String url = "https://www.kayak.com/h/mobileapis/directory/airlines";
public ProgressDialog pDialog;
public List<Airlines> airlinesList = new ArrayList<Airlines>();
public ListView listView;
public AirlinesListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list);
adapter = new AirlinesListAdapter(this, airlinesList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(this);
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// Listview on item click listener
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String phone = ((TextView) view.findViewById(R.id.phone))
.getText().toString();
String site = ((TextView) view.findViewById(R.id.site))
.getText().toString();
String logoURL = String.valueOf(((ImageView) view.findViewById(R.id.logoURL)));
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_PHONE, phone);
in.putExtra(TAG_SITE, site);
in.putExtra(TAG_LOGO, logoURL);
startActivity(in);
}
});
// changing action bar color
getSupportActionBar().setBackgroundDrawable(
new ColorDrawable(Color.parseColor("#1b1b1b")));
// Creating volley request obj
JsonArrayRequest airlinesReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
hidePDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Airlines airlines = new Airlines();
airlines.setName(obj.getString("name"));
airlines.setLogoURL(obj.getString("logoURL"));
airlines.setPhone(obj.getString("phone"));
airlines.setCode(obj.getInt("code"));
airlines.setSite(obj.getString("site"));
// adding airlines to movies array
airlinesList.add(airlines);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(airlinesReq);
FragmentManager fragmentManager = getSupportFragmentManager();
/*
* This is called when orientation is changed.
*/
if (savedInstanceState != null) {
if (savedInstanceState.containsKey("content")) {
String content = savedInstanceState.getString("content");
if (content.equals(FavoriteListFragment.ARG_ITEM_ID)) {
if (fragmentManager.findFragmentByTag(FavoriteListFragment.ARG_ITEM_ID) != null) {
setFragmentTitle(R.string.favorites);
contentFragment = fragmentManager
.findFragmentByTag(FavoriteListFragment.ARG_ITEM_ID);
}
}
}
if (fragmentManager.findFragmentByTag(AirlinesListFragment.ARG_ITEM_ID) != null) {
airlinesListFragment = (AirlinesListFragment) fragmentManager
.findFragmentByTag(AirlinesListFragment.ARG_ITEM_ID);
contentFragment = airlinesListFragment;
}
} else {
airlinesListFragment = new AirlinesListFragment();
// setFragmentTitle(R.string.app_name);
switchContent(airlinesListFragment, AirlinesListFragment.ARG_ITEM_ID);
}
}
@Override
public void onDestroy() {
super.onDestroy();
hidePDialog();
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onSaveInstanceState(Bundle outState) {
if (contentFragment instanceof FavoriteListFragment) {
outState.putString("content", FavoriteListFragment.ARG_ITEM_ID);
} else {
outState.putString("content", AirlinesListFragment.ARG_ITEM_ID);
}
super.onSaveInstanceState(outState);
}
// @Override
// public boolean onCreateOptionsMenu(Menu menu) {
// getMenuInflater().inflate(R.menu.main, menu);
// return true;
// }
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_favorites:
setFragmentTitle(R.string.favorites);
favoriteListFragment = new FavoriteListFragment();
switchContent(favoriteListFragment, FavoriteListFragment.ARG_ITEM_ID);
return true;
}
return super.onOptionsItemSelected(item);
}
public void switchContent(Fragment fragment, String tag) {
FragmentManager fragmentManager = getSupportFragmentManager();
while (fragmentManager.popBackStackImmediate());
if (fragment != null) {
FragmentTransaction transaction = fragmentManager
.beginTransaction();
transaction.replace(R.id.content_frame, fragment, tag);
//Only FavoriteListFragment is added to the back stack.
if (!(fragment instanceof AirlinesListFragment)) {
transaction.addToBackStack(tag);
}
transaction.commit();
contentFragment = fragment;
}
}
protected void setFragmentTitle(int resourseId) {
setTitle(resourseId);
getSupportActionBar().setTitle(resourseId);
}
/*
* We call super.onBackPressed(); when the stack entry count is > 0. if it
* is instanceof ProductListFragment or if the stack entry count is == 0, then
* we finish the activity.
* In other words, from ProductListFragment on back press it quits the app.
*/
@Override
public void onBackPressed() {
FragmentManager fm = getSupportFragmentManager();
if (fm.getBackStackEntryCount() > 0) {
super.onBackPressed();
} else if (contentFragment instanceof AirlinesListFragment
|| fm.getBackStackEntryCount() == 0) {
finish();
}
}
}
Model:
package com.boom.kayakapp.model;
public class Airlines {
private String name, logoURL, phone, site;
private int code;
public Airlines() {
}
public Airlines
(String name, String logoURL, int code, String phone, String site) {
this.name = name;
this.logoURL = logoURL;
this.code = code;
this.phone = phone;
this.site = site;
}
public String getName() {return name;}
public void setName(String name) {this.name = name;}
public String getLogoURL() {return logoURL;}
public void setLogoURL(String logoURL) {this.logoURL = logoURL;}
public int getCode() {return code;}
public void setCode(Integer code) {this.code = code;}
public String getPhone() {return phone;}
public void setPhone(String phone) {this.phone = phone;}
public String getSite() {return site;}
public void setSite(String site) {this.site = site;}
}
1 answers
solution1
0 ACCPTED 2015-06-17 20:38:50
setAdapter calls getCount but the list is null so just init the airlines list like this
public AirlinesListAdapter(Activity activity, List<Airlines> favorites) {
super(activity, R.layout.list_item, favorites);
this.activity = activity;
if(favorites == null)
favorites = new ArrayList<>();
else
this.favorites = favorites;
sharedPreference = new SharedPreference();
}
second solution : init the array in the fragment
public AirlinesListFragment() {
airlines = new ArrayList<>();
}
this should solve your problem
check out this page for the solution : Can't get Action Bar in fragment class
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java.util.ArrayList cannot be cast to bean.Book
java.util.ArrayList cannot be cast to myclass - gson
java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList
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