I have a Fragment with a RecyclerView that I want to update after I get some data from an IntentService.
The service finishes and sends the data to the Fragment using Otto EventBus.I can confirm that cause I add some log messages and print some values eg : dataSet.get(0).getName().
After that I call adapter.notifyDataSetChanged() but nothing appears on my screen.
I can give you the code of my custom Adapter if you think that it can help :
public class FilteredVideoListAdapter extends RecyclerView.Adapter<FilteredVideoListAdapter.ViewHolder> {
public static final String TAG = "FILTEREDVIDEO-ADAPTER";
public List<FilteredVideo> data;
public Context context;
public FilteredVideoListAdapter(List<FilteredVideo> data) {
this.data = data;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
TextView tvTitle;
TextView tvSubtitle;
ImageView imageView;
public ViewHolder(View itemView) {
super(itemView);
tvTitle = (TextView) itemView.findViewById(R.id.tv_filtered_video_title);
tvSubtitle = (TextView) itemView.findViewById(R.id.tv_filtered_video_subtitle);
imageView = (ImageView) itemView.findViewById(R.id.iv_filtered_video_image);
}
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
context = parent.getContext();
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_filtered_video, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
viewHolder.tvTitle.setText(data.get(position).getName());
viewHolder.tvSubtitle.setText(data.get(position).getDataUrl());
int dimen = context.getResources().getDimensionPixelSize(R.dimen.filtered_video_image_size);
Picasso.with(context)
.load(data.get(position).getThumbnailUrl())
.resize(dimen, dimen)
.into(viewHolder.imageView);
}
#Override
public int getItemCount() {
return data.size();
}
}
And the code of the Fragment class :
public class FilteredVideoListFragment extends BaseFragment {
private static final String TAG = "FILTEREDVLIST-FRAGMENT";
public RecyclerView recyclerView;
protected FilteredVideoListAdapter adapter;
protected RecyclerView.LayoutManager layoutManager;
public List<FilteredVideo> dataSet;
//first time there aren't any populated data
private boolean datasetIsNull = true;
public static FilteredVideoListFragment newInstance() {
return new FilteredVideoListFragment();
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dataSet = new ArrayList<>();
BusProvider.getInstance().register(this);
// startService here -
Intent intentService = new Intent(activity, GetMostPopularIntentService.class);
activity.startService(intentService);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_filtered_video_list, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.rv_filtered_video_list);
recyclerView.setHasFixedSize(true);
recyclerView.addItemDecoration(new DividerItemDecoration(getActivity(),
DividerItemDecoration.VERTICAL_LIST));
layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
adapter = new FilteredVideoListAdapter(dataSet);
recyclerView.setAdapter(adapter);
return view;
}
private BroadcastReceiver mostpopularReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String resultCode = intent.getStringExtra("resultCode");
if ("OK".equals(resultCode)) {
Toast.makeText(activity, "Most Popular Results Received!", Toast.LENGTH_SHORT).show();
}
}
};
/** Register/ unRegister Receiver */
#Override
public void onResume() {
super.onResume();
IntentFilter intentFilter = new IntentFilter(GetMostPopularIntentService.ACTION);
LocalBroadcastManager.getInstance(activity).registerReceiver(mostpopularReceiver, intentFilter);
}
#Override
public void onPause() {
super.onPause();
LocalBroadcastManager.getInstance(activity).unregisterReceiver(mostpopularReceiver);
}
/**
* Receives Event from GetMostPopularIntentService when data retrieved
* successfully.
*/
#Subscribe
public void onMostPopularReceivedEvent(MostPopularReceivedEvent event) {
Log.i(TAG, "clickevent ");
dataSet = event.getFilteredVideoList();
Log.i(TAG, "NOTIFY ADAPTER SIZE == " + dataSet.size() );
Log.i(TAG, "NOTIFY ADAPTER SIZE == " + dataSet.get(0).getName() );
adapter.notifyDataSetChanged();
Log.i(TAG, "AFTER NOTIFY ADAPTER ");
}
#Subscribe
public void onToastRequest(ToastRequest request) {
Log.i(TAG, "onToastRequest ");
Toast.makeText(activity, request.message, request.duration).show();
}
}
Try -
#Subscribe
public void onMostPopularReceivedEvent(MostPopularReceivedEvent event) {
adapter = new FilteredVideoListAdapter(event.getFilteredVideoList());
recyclerView.setAdapter(adapter);
}
Try this adapter
public class FilteredVideoListAdapter extends RecyclerView.Adapter<FilteredVideoListAdapter.ViewHolder> {
public static final String TAG = "FILTEREDVIDEO-ADAPTER";
public List<FilteredVideo> data;
public Context mContext;
public FilteredVideoListAdapter(Context context, List<FilteredVideo> data) {
this.data = data;
this.mContext = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_filtered_video, null);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(ViewHolder customViewHolder, int i) {
FilteredVideo filteredVideo = data.get(i);
customViewHolder.tvTitle.setText(filteredVideo.getName());
customViewHolder.tvSubtitle.setText(filteredVideo.getDataUrl());
int dimen = mContext.getResources().getDimensionPixelSize(R.dimen.filtered_video_image_size);
Picasso.with(mContext)
.load(filteredVideo.getThumbnailUrl())
.resize(dimen, dimen)
.into(customViewHolder.imageView);
}
#Override
public int getItemCount() {
return (null != data ? data.size() : 0);
}
}
And call in your Fragment like this
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_filtered_video_list, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.rv_filtered_video_list);
recyclerView.setHasFixedSize(true);
recyclerView.addItemDecoration(new DividerItemDecoration(getActivity(),
DividerItemDecoration.VERTICAL_LIST));
layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
adapter = new FilteredVideoListAdapter(getActivity(), dataSet);
recyclerView.setAdapter(adapter);
return view;
}
Related
I'm trying to display all contacts from phone to recyclerView when a user presses any item it should do some work. I have a list of contacts in a fragment which is inside a fragment page adapter when ever I click in the recyclerView item onClicklistener is not executing
I have used same code in a previous app but onclicklisteners are triggering
public class ListOfContacts extends Fragment implements OnContactListener {
private static final String TAG = "ListOfContacts";
ArrayList<ContactModel> arrayList = new ArrayList<>();
RecyclerView mRecyclerview;
ListOfContactsRAdapter listOfContactsRAdapter;
Cursor cursor;
public static ListOfContacts getInstance(ArrayList<ContactModel> arrayList) {
ListOfContacts listOfContacts = new ListOfContacts();
Bundle bundle = new Bundle();
bundle.putParcelableArrayList("listofcontacts", arrayList);
listOfContacts.setArguments(bundle);
return listOfContacts;
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_list_of_contacts, container, false);
mRecyclerview = view.findViewById(R.id.loc_r_view);
listOfContactsRAdapter = new ListOfContactsRAdapter(getActivity(), this, arrayList);
mRecyclerview.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerview.setAdapter(listOfContactsRAdapter);
mRecyclerview.addItemDecoration(new DividerItemDecoration(mRecyclerview.getContext(), DividerItemDecoration.VERTICAL));
mRecyclerview.setHasFixedSize(true);
return view;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
arrayList.addAll(Objects.requireNonNull(getArguments().<ContactModel>getParcelableArrayList("listofcontacts")));
Log.d(TAG, "contact recived " + arrayList.get(0).getContactName());
} else {
if (getArguments().getStringArrayList("listofcontacts") != null)
arrayList.addAll(getArguments().<ContactModel>getParcelableArrayList("listofcontacts"));
}
}
}
#Override
public void onDueListener(int position) {
Log.d(TAG, "onDueListener: ");
ContactModel contactModel = new ContactModel();
contactModel.setContactName(arrayList.get(position).getContactName());
contactModel.setContactNumberp(arrayList.get(position).getContactNumberp());
contactModel.setState(true);
Intent intent = new Intent(getActivity(), AddDue.class);
intent.putExtra("userDetails", contactModel);
startActivity(intent);
}
}
public ListOfContactsRAdapter(Context context, OnContactListener a, ArrayList<ContactModel> arrayList) {
Log.d(TAG, "ListOfContactsRAdapter: +" + arrayList.size());
ContactListener = a;
this.arrayList = new ArrayList<>();
if (arrayList != null)
this.arrayList.addAll(arrayList);
mContext = context;
}
#NonNull
#Override
public CustomViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.loc_r_container, viewGroup, false);
customViewHolder = new CustomViewHolder(view, ContactListener);
return customViewHolder;
}
#Override
public void onBindViewHolder(#NonNull CustomViewHolder customViewHolder, int i) {
customViewHolder.contactName.setText(arrayList.get(i).getContactName());
customViewHolder.contactNumber.setText(arrayList.get(i).getContactNumberp());
customViewHolder.contactDp.setText(String.valueOf(arrayList.get(i).getContactName().charAt(0)));
}
#Override
public int getItemCount() {
Log.d(TAG, "getItemCount: ");
return arrayList.size();
}
static class CustomViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
OnContactListener Listener;
TextView contactName;
TextView contactNumber;
TextView contactDp;
Button button;
LinearLayout linearLayout;
CustomViewHolder(#NonNull View itemView, OnContactListener mOnContactListener) {
super(itemView);
contactName = itemView.findViewById(R.id.contact_name);
contactNumber = itemView.findViewById(R.id.contact_number);
button = itemView.findViewById(R.id.action);
contactDp = itemView.findViewById(R.id.contactDp);
linearLayout = itemView.findViewById(R.id.container);
linearLayout.setOnClickListener(this);
Listener = mOnContactListener;
button.setOnClickListener(this);
}
#Override
public void onClick(View v) {
Log.d(TAG, "onClick: ");
Listener.onDueListener(getAdapterPosition());
}
}
}
What i did is create an Interface in your RecyclerView Adapter:
public interface OnClickItem { // create an interface
void onClickItem(int position); // create callback function
}
Then in OnBindViewHolder:
customViewHolder.(yourView).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ContactListener.onClickItem(customViewHolder.getAdapterPosition());
}
});
In your Fragment:
public class ListOfContacts extends Fragment implements ListOfContactsRAdapter.OnClickItem { ...
Implement the method:
#Override
public void onClickItem(int position) {
...
}
I tried to set the adapter on fragment, but nothing shows up.
The object retrieves the data from API but doesn't show on the screen.
I have already put the break point on rvItem.setAdapter(mainAdapter); but nothings happen, the debug passes straight through.
public class ItemFragment extends Fragment {
private MainAdapter mainAdapter;
private ItemPresenter itemPresenter;
private GridLayoutManager mLayoutManager;
private List<ObjectAdapter> list = new ArrayList<>();
private String region = "br";
#Bind(R.id.rvItem)
RecyclerView rvItem;
public ItemFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_item, container, false);
ButterKnife.bind(this, view);
itemPresenter = new ItemPresenter();
mLayoutManager = new GridLayoutManager(getActivity(), 4);
rvItem.setLayoutManager(mLayoutManager);
getList();
return view;
}
private void getList() {
itemPresenter.loadItemList(region, "all", AppConfigs.api_key, new ItemListListener() {
#Override
public void onRequestStarted() {
}
#Override
public void onRequestFinished() {
}
#Override
public void onError(Throwable error) {
}
#Override
public void onItemListLoad(List<ItemDto> itemList) {
displayItemList(ObjectAdapter.convertItemToObjetct(itemList));
}
});
}
public void displayItemList(List<ObjectAdapter> itemList) {
list = itemList;
mainAdapter = new MainAdapter(getActivity(), list, new MainAdapter.OnObjectClickListener() {
#Override
public void OnObjectClickListener(ObjectAdapter objectAdapter) {
Toast.makeText(getActivity(), "Object Adapter" + objectAdapter.Id, Toast.LENGTH_SHORT).show();
}
});
rvItem.setAdapter(mainAdapter);
mainAdapter.notifyDataSetChanged();
}
}
Adapter:
public class MainAdapter extends
RecyclerView.Adapter<MainAdapter.MainAdapterViewHolder> {
public List<ObjectAdapter> mObjecterList;
private final OnObjectClickListener listener;
private Context mContext;
public interface OnObjectClickListener {
void OnObjectClickListener(ObjectAdapter objectAdapter);
}
public MainAdapter(Context context, List<ObjectAdapter> objectAdapterList, OnObjectClickListener listener) {
this.mObjecterList = objectAdapterList;
this.listener = listener;
this.mContext = context;
}
#Override
public MainAdapter.MainAdapterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_main_adapter, parent, false);
return new MainAdapterViewHolder(view);
}
#Override
public void onBindViewHolder(MainAdapter.MainAdapterViewHolder holder, int position) {
ObjectAdapter ob = mObjecterList.get(position);
holder.tvNameText.setText(ob.Name);
holder.bind(mObjecterList.get(position), listener);
String url = "";
switch (ob.Type){
case CHAMPION: url = String.format(AppConfigs.portraitChampion, ob.Portrait);
break;
case SPELL: url = String.format(AppConfigs.portraitSpell, ob.Portrait);
break;
case ITEM: url = String.format(AppConfigs.portraitItem, ob.Portrait);
break;
}
Picasso.with(mContext).load(url).into(holder.ivRetrato);
}
#Override
public int getItemCount() {
return this.mObjecterList.size();
}
public static class MainAdapterViewHolder extends RecyclerView.ViewHolder {
public TextView tvNameText;
public ImageView ivRetrato;
public MainAdapterViewHolder(View itemView) {
super(itemView);
this.tvNameText = (TextView) itemView.findViewById(R.id.tvNameText);
this.ivRetrato = (ImageView) itemView.findViewById(R.id.ivImagePortrait);
}
public void bind(final ObjectAdapter objectAdapterListItem, final OnObjectClickListener listener) {
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
listener.OnObjectClickListener(objectAdapterListItem);
}
});
}
}
}
You need to set adapter directly at onCreateView method and call notifyDataSetChanged() of adapter when data loaded
Fragment_bookmovie2.java
public class Fragment_bookmovie2 extends android.support.v4.app.Fragment implements View.OnClickListener {
private static final String TAG ="Fragment_bookmovie2" ;
ArrayList<String> moviename= new ArrayList<>();
ArrayList<String> movieyear= new ArrayList<>();
ArrayList<String> moviebanner= new ArrayList<>();
private RecyclerView.LayoutManager layoutManager;
private static RecyclerView recyclerView;
Movie_listAdapter2 adapter ;
LinearLayout progress;
RelativeLayout ll;
public Fragment_bookmovie2() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Log.e(TAG,"reched on create");
// first step - retrieve object
Backendless.Persistence.of(Booking.class).find(new AsyncCallback<BackendlessCollection<Booking>>() {
#Override
public void handleResponse(BackendlessCollection<Booking> response) {
for(Booking booking : response.getData()) {
if(!moviename.contains(booking.getMovie().get(0).getMovie_Name())) {
moviename.add(booking.getMovie().get(0).getMovie_Name());
movieyear.add(booking.getMovie().get(0).getYear());
moviebanner.add("https://api.backendless.com/" + BackendSetting.APPLICATION_ID + "/" + BackendSetting.VERSION + "/files/mypics/" + booking.getMovie().get(0).getImage());
}
}
adapter.notifyDataSetChanged();
ll.removeView(progress);
}
#Override
public void handleFault(BackendlessFault fault) {
Toast.makeText(getActivity(), fault.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
moviename.add("haha");
movieyear.add("hello");
moviebanner.add("http://www.w3schools.com/css/trolltunga.jpg");
// Inflate the layout for this fragment
ll = (RelativeLayout) inflater.inflate(R.layout.fragment_bookmovie2, container, false);
progress = (LinearLayout) ll.findViewById(R.id.progress_bookingFrag);
recyclerView = (RecyclerView) ll.findViewById(R.id.recycle_movielist);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
adapter = new Movie_listAdapter2(getActivity(),moviename,movieyear,moviebanner);
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
return ll;
}
#Override
public void onClick(View view) {
}
#Override
public void onPause() {
super.onPause();
}
#Override
public void onResume() {
super.onResume();
}
/*#Override
public void onButtonClickListnerProceed(Integer pos) {
Intent booking_screen_redirect = new Intent(getActivity(), BookingScreen2.class);
booking_screen_redirect.putExtra("movie_name",moviename.get(pos));
this.onPause();
startActivity(booking_screen_redirect);
getActivity().overridePendingTransition(R.anim.pull_in_right, R.anim.push_out_left);
}*/
}
Movie_listAdapter2.java
public class Movie_listAdapter2 extends RecyclerView.Adapter<Movie_listAdapter2.Movie_cards>{
final static String TAG="Movie_listAdapter2";
Context context_external;
ArrayList<String> moviename=new ArrayList<>();
ArrayList<String> movieyear=new ArrayList<>();
ArrayList<String> banner=new ArrayList<>();
public Movie_listAdapter2(Context context,ArrayList<String> resource, ArrayList<String> resource1, ArrayList<String> resource2) {
//set the context and the format of the layout inside the list item
//i.e R.layout.movie_list_adapter
//also the resource i.e the item names in an ArrayList
this.moviename = resource;
this.movieyear = resource1;
this.banner = resource2;
this.context_external=context;
Log.e(TAG,"size = "+movieyear.size()+" "+moviename.size());
}
public static class Movie_cards extends RecyclerView.ViewHolder {
CardView cv;
TextView movie_name;
TextView movie_year;
Button proceed;
ImageView movie_banner;
public Movie_cards(View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.movie_list_card);
movie_name = (TextView)itemView.findViewById(R.id.tv_card_moviename);
movie_year = (TextView)itemView.findViewById(R.id.tv_card_movieyear);
movie_banner = (ImageView)itemView.findViewById(R.id.card_moviebanner);
proceed = (Button) itemView.findViewById(R.id.b_card_proceed);
}
}
#Override
public Movie_cards onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.movie_list_card, parent, false);
Movie_cards pvh = new Movie_cards(v);
return pvh;
}
public void updateData(ArrayList<String> resource, ArrayList<String> resource1, ArrayList<String> resource2) {
this.moviename = resource;
this.movieyear = resource1;
this.banner = resource2;
notifyDataSetChanged();
}
#Override
public void onBindViewHolder(final Movie_cards holder, final int position) {
holder.movie_name.setText(moviename.get(position));
holder.movie_year.setText(movieyear.get(position));
Picasso.with(context_external)
.load(banner.get(position))
.placeholder(R.drawable.placeholder)
.networkPolicy(NetworkPolicy.OFFLINE)
.error(R.drawable.placeholder)
.fit()
.into(holder.movie_banner, new Callback() {
#Override
public void onSuccess() {
//i.e image was loaded from cache
}
#Override
public void onError() {
//image was downloaded as it wasn't available in cache
Picasso.with(context_external)
.load(banner.get(position))
.placeholder(R.drawable.placeholder)
.error(R.drawable.warning)
.fit()
.into(holder.movie_banner);
}
});
holder.proceed.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
Intent booking_screen_redirect = new Intent(context_external, BookingScreen2.class);
booking_screen_redirect.putExtra("movie_name",moviename.get(position));
context_external.startActivity(booking_screen_redirect);
//overridePendingTransition(R.anim.pull_in_right, R.anim.push_out_left);
}
});
}
#Override
public int getItemCount() {
return 0;
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
}
the fragment displays empty and no items appear even though i have added the data to arraylists and passed to the adapter. please help . thanks in advance
Problem is in below code you are returning 0 that's why its not showing any item
#Override
public int getItemCount() {
return 0;
}
You should return your list's size here either moviename.size(); or movieyear.size()
I would like to know how to handle position of the row if the adapter is changed - for example if I write something to SearchView - adapter has changed and position is different. I have done this (below), but it shows the item before changed position.
My issue is with Recycler view item click.
Could you help me with that?
Adapter
public class ContactsRecyclerAdapter extends RecyclerView.Adapter<ContactsRecyclerAdapter.BindingHolder> {
private static OnItemClickListener listener;
public interface OnItemClickListener {
void onItemClick(View itemView, int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
this.listener = listener;
}
private List<Contact> mContacts;
private List<Contact> mContactsFiltered;
SearchViewFilter filter;
Context mContext;
public ContactsRecyclerAdapter(Context context, List<Contact> contact) {
this.mContext = context;
this.mContacts = contact;
this.mContactsFiltered = contact;
filter = new SearchViewFilter(mContacts, this);
}
public static class BindingHolder extends RecyclerView.ViewHolder {
private ViewDataBinding binding;
public BindingHolder(final View rowView) {
super(rowView);
binding = DataBindingUtil.bind(rowView);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (listener != null)
listener.onItemClick(itemView, getLayoutPosition());
}
});
}
public ViewDataBinding getBinding() {
return binding;
}
}
#Override
public BindingHolder onCreateViewHolder(ViewGroup parent, int type) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item_contact, parent, false);
BindingHolder holder = new BindingHolder(view);
return holder;
}
#Override
public void onBindViewHolder(BindingHolder holder, int position) {
final Contact contact = mContactsFiltered.get(position);
holder.getBinding().setVariable(BR.contact, contact);
holder.getBinding().executePendingBindings();
}
Fragment
public class ContactListFragment extends Fragment implements View.OnClickListener {
FloatingActionButton fabButton;
SearchView searchView;
RecyclerView recyclerView;
String name, number, email;
private List<Contact> mContact = new ArrayList<>();
private ContactsRecyclerAdapter mAdapter;
public static ContactListFragment newInstance() {
Bundle args = new Bundle();
ContactListFragment fragment = new ContactListFragment();
fragment.setArguments(args);
return fragment;
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
#Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_contact_list, container, false);
searchView = (SearchView) view.findViewById(R.id.search_view);
recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
mContact = SugarRecord.listAll(Contact.class);
mAdapter = new ContactsRecyclerAdapter(getActivity(), mContact);
recyclerView.setAdapter(mAdapter);
//item click
mAdapter.setOnItemClickListener(new ContactsRecyclerAdapter.OnItemClickListener() {
#Override
public void onItemClick(View itemView, int position) {
Contact contact = SugarRecord.findById(Contact.class, (long) position + 1);
name = contact.getName();
number = contact.getNumber();
email = contact.getEmail();
showAlertDialog();
}
});
searchFilter();
return view;
}
public void sortList() {
if(mContact.size() > 0) {
if (!isSort) {
Collections.sort(mContact, new Comparator<Contact>() {
#Override
public int compare(Contact contact1, Contact contact2) {
return contact1.getName().compareToIgnoreCase(contact2.getName());
}
});
}
else {
Collections.reverse(mContact);
isSort = false;
}
}
mAdapter.notifyDataSetChanged();
Click listener does not work with a RecyclerView. use OnItemTouchListener()
RecyclerView recyclerView = findViewById(R.id.recycler);
recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
#Override public void onItemClick(View view, int position) {
// do whatever
}
#Override public void onLongItemClick(View view, int position) {
// do whatever
}
})
);
you have to overide onclick in BindingHolder class. Inside onclick method invoke a callback method of object passed via constructor etc
public static class BindingHolder extends RecyclerView.ViewHolder {
private ViewDataBinding binding;
public BindingHolder(final View rowView) {
super(rowView);
binding = DataBindingUtil.bind(rowView);
public void onClick(View view) {
//call a callback method here
}
}
public ViewDataBinding getBinding() {
return binding;
}
}
I'm in a fragment trying to updated my recycler view, after querying Parse for some data. In the done method of the query I call notifyDataSetChagned, but the list is never displayed
package com.garciaericn.t2d.fragments;
public class DevicesCardViewFragment extends Fragment implements View.OnClickListener {
private OnFragmentInteractionListener mListener;
private BatteryHelper mBatteryHelper;
Intent mBatteryStatus;
private RecyclerView mRecyclerView;
private DeviceAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private List<Device> mDevices;
public DevicesCardViewFragment() {
// Required empty public constructor
mDevices = new ArrayList<Device>();
}
public static DevicesCardViewFragment newInstance() {
// Bundle parameters is necessary
return new DevicesCardViewFragment();
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get arguments
getDevices();
mBatteryHelper = new BatteryHelper(getActivity());
IntentFilter intentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
mBatteryStatus = getActivity().registerReceiver(null, intentFilter);
// Update stats of current device.
Toast.makeText(getActivity(), "Battery level: " + mBatteryHelper.getCurrentBatteryLevel() + "%", Toast.LENGTH_LONG).show();
// Update device stats
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_devices_list, container, false);
mListener.showAd();
// Obtain recycler view
mRecyclerView = (RecyclerView) view.findViewById(R.id.devices_recycler_view);
mRecyclerView.setHasFixedSize(true);
mAdapter = new DeviceAdapter(getActivity(), mDevices);
// Set adapter
mRecyclerView.setAdapter(mAdapter);
// Set layout manager
mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
return view;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mListener = (OnFragmentInteractionListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public List<Device> getDevices() {
ParseQuery<Device> query = ParseQuery.getQuery(Device.DEVICES);
// new ParseQuery<Device>(Device.DEVICES);
query.whereEqualTo("deviceUser", ParseUser.getCurrentUser());
query.findInBackground(new FindCallback<Device>() {
#Override
public void done(List<Device> devices, ParseException e) {
if (e == null) {
// Loop through return devices
for (Device device : devices) {
Device currentDevice = new Device();
currentDevice.setDeviceName(device.getDeviceName());
currentDevice.setBatteryLevel(device.getBatteryLevel());
currentDevice.setIsCharging(device.isCharging());
mDevices.add(currentDevice);
}
mAdapter.notifyDataSetChanged();
} else {
// Something went wrong
Toast.makeText(getActivity(), "Error: " + e.toString(), Toast.LENGTH_LONG).show();
}
}
});
return mDevices;
}
#Override
public void onClick(View v) {
// Click events go here
}
public static DevicesCardViewFragment newInstance(List<Device> mDevices) {
DevicesCardViewFragment fragment = new DevicesCardViewFragment();
Bundle args = new Bundle();
return fragment;
}
public interface OnFragmentInteractionListener {
public void showAd();
}
}
My recyclerViewAdapter looks like this:
package com.garciaericn.t2d.data;
public class DeviceAdapter extends RecyclerView.Adapter<DeviceAdapter.MyViewHolder> {
private final LayoutInflater inflater;
List<Device> data = Collections.emptyList();
public DeviceAdapter(Context context, List<Device> data) {
inflater = LayoutInflater.from(context);
this.data = data;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.card_layout, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Device device = data.get(position);
holder.deviceNameTV.setText(device.getDeviceName());
holder.batteryLevelTV.setText(device.getBatteryLevel());
}
#Override
public int getItemCount() {
return 0;
}
public static class MyViewHolder extends RecyclerView.ViewHolder {
// Temp data set
private String[] mDataset;
TextView deviceNameTV;
TextView batteryLevelTV;
public MyViewHolder(View itemView) {
super(itemView);
deviceNameTV = (TextView) itemView.findViewById(R.id.device_name_tv);
batteryLevelTV = (TextView) itemView.findViewById(R.id.battery_level_tv);
}
}
}
Change getItemCount() to actually return the correct value:
#Override
public int getItemCount() {
return data.size()
}