I am developing an app which retrieves images from Firebase. I have retrieved all the images from Firebase successfully but when I select some image as a favorite, it duplicate all the selected images twice or thrice in the new activity in RecyclerView. Please help me anyone. Thanks in advance..
Here is my code.
public class Fragment3 extends Fragment {
ArrayList<String> ImagesList = (ArrayList) (ListofData.FavoriteList = new ArrayList<>());
Set<String> hashset = new HashSet<String>(ImagesList);
RecyclerView recyclerView;
FragThreeAdapter adapter;
public Fragment3() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_fragment3, container, false);
FirebaseHandler firebaseHandler = new FirebaseHandler(getActivity());
firebaseHandler.getFavoriteUrlRef().addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot d : dataSnapshot.getChildren()) {
String images = d.getValue().toString();
ImagesList.add(images);
adapter.notifyDataSetChanged();
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
ArrayList<String> Images = new ArrayList<>(hashset);
recyclerView = view.findViewById(R.id.frag3_fav_recyclerView);
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 2));
adapter = new FragThreeAdapter(Images, getActivity());
recyclerView.setHasFixedSize(true);
recyclerView.setAdapter(adapter);
return view;
}
}
My Click Listener
favoriteButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(activity, "saved to favorite", Toast.LENGTH_SHORT).show();
reference = FirebaseDatabase.getInstance().getReference().child("Favorite");
String key = reference.push().getKey();
reference.child(key).setValue(imagePaths.get(position));
My Adapter Class
public class FragThreeAdapter extends RecyclerView.Adapter<FragThreeAdapter.myHolder> {
private List<String> list;
private Context context;
public FragThreeAdapter(List<String> list, Context context) {
this.list = list;
this.context = context;
}
#NonNull
#Override
public myHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater= LayoutInflater.from(context);
View view= inflater.inflate(R.layout.list_item,parent,false);
return new myHolder(view);
}
#Override
public void onBindViewHolder(#NonNull myHolder holder, int position) {
Glide.with(context)
.load(list.get(position))
.into(holder.imageView);
holder.imageView.setOnClickListener(new OnImageClickListner(position));
}
#Override
public int getItemCount() {
return list.size();
}
public class myHolder extends RecyclerView.ViewHolder{
ImageView imageView;
public myHolder(View itemView) {
super(itemView);
imageView= itemView.findViewById(R.id.imageView_id);
}
}
class OnImageClickListner implements View.OnClickListener{
int position;
public OnImageClickListner(int position){
this.position= position;
}
#Override
public void onClick(View v) {
Intent intent= new Intent(context,Frag3_Favrit_FullActvity.class);
intent.putExtra("array_position",position);
intent.putStringArrayListExtra("list", (ArrayList<String>) list);
context.startActivity(intent);
}
}
}
You can try to make like this:
public void onBindViewHolder(#NonNull myHolder holder, int position) {
if (list.get(position) != null) {
Glide.with(context)
.load(list.get(position))
.into(holder.imageView);
} esle {
holder.imageView.setImageResource(R.mipmap.some_default_cover);
}
holder.imageView.setOnClickListener(new OnImageClickListner(position));
}
Related
I have created a simple notes app in which I'm storing data in firebase. Showing the list of notes(time and few words of a note) in recyclerview. Now I want when I click in a particular note, it take to different activity where the details of the note will be shown. I am not able to get data from firebase column wise(note and time).
CustomAdapter
Here I'm sending the position of the item clicked to NotesDetails class
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> {
Context context;
ArrayList<Model> models;
public CustomAdapter(Context context, ArrayList<Model> models){
this.context = context;
this.models = models;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.list_content, parent, false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int position) {
holder.time_text.setText(models.get(holder.getBindingAdapterPosition()).getText());
holder.string_text.setText(models.get(holder.getBindingAdapterPosition()).getNotes());
holder.constraintLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context.getApplicationContext(), NotesDetails.class);
intent.putExtra("position", String.valueOf(holder.getBindingAdapterPosition()));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
});
}
#Override
public int getItemCount() { return models.size(); }
public class MyViewHolder extends RecyclerView.ViewHolder {
TextView string_text, time_text;
ConstraintLayout constraintLayout;
public MyViewHolder(View itemView) {
super(itemView);
string_text = itemView.findViewById(R.id.textView);
time_text = itemView.findViewById(R.id.timeshow);
constraintLayout = itemView.findViewById(R.id.constraintLayout);
}
}
}
NotesDetails
I want to show time and details of particular item here in testShow and timeShow
public class NotesDetails extends AppCompatActivity {
ArrayList<Model> models;
TextView textShow, timeShow;
DBHelper myDB;
DatabaseReference dbReference;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_notes_details);
textShow = findViewById(R.id.notesShow);
timeShow = findViewById(R.id.timeshow);
myDB = new DBHelper(this);
Intent intent = getIntent();
int position = Integer.parseInt(intent.getStringExtra("position"));
dbReference = FirebaseDatabase.getInstance().getReference("Model").child("notes");
dbReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull #NotNull DataSnapshot snapshot) {
for(DataSnapshot dataSnapshot: snapshot.getChildren()){
Model m1 = dataSnapshot.getValue(Model.class);
textShow.setText((CharSequence) m1);
}
}
#Override
public void onCancelled(#NonNull #NotNull DatabaseError error) {
}
});
}
}
I have created a RecyclerView Adapter but now i'm struggling to do the onClick to open new activity.
This is my RecyclerView Adapter class:
public class RecycleAdapter extends RecyclerView.Adapter<RecycleAdapter.ViewHolder> {
private ArrayList<HashMap<String, String>> mDataset;
Context ctx;
public RecycleAdapter(ArrayList<HashMap<String, String>> mDataset) {
this.mDataset = mDataset;
this.ctx = ctx;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_procedure, parent, false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.getId().setText(mDataset.get(position).get("id"));
holder.getItemname().setText(mDataset.get(position).get("name"));
//holder.getIvImage().setBackground(mDataset.get(position).get("icon"));
}
#Override
public int getItemCount() {
return mDataset.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private CardView cardView;
private TextView itemId;
private TextView tvName;
private ImageView ivImage;
public ViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
itemId = itemView.findViewById(R.id.tvProfileItemName);
tvName = itemView.findViewById(R.id.tvProfileItemAge);
ivImage = itemView.findViewById(R.id.imageView3);
}
public TextView getId() {
return itemId;
}
public TextView getItemname() {
return tvName;
}
public ImageView getIvImage() {
return ivImage;
}
#Override
public void onClick(View v) {
}
}
}
My Main Activity just display the data inside of a recycler view
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
ListAdapter adapter = new SimpleAdapter(MainActivity.this, contactList,
R.layout.list_item, new String[]{"id", "name", "icon"},
new int[]{R.id.id, R.id.name, R.id.icon});
mAdapter = new RecycleAdapter(contactList);
mRecyclerView.setAdapter(mAdapter);
}
use interface
in recycler view adapter class
public interface recClick{
void onClickRec(int p);
}
private recClick rc;
public void setRecClick(recClick rc){
this.rc = rc
}
in recycler view holder class
#Override
public void onClick(View v) {
rc.onClickRec(getAdapterPosition());
}
in MainActivity use Interface
class MainActivity implements AdapterClass.recClick{
mAdapter.setRecClick(this);
#Override
public onClickRec(int p)
{
// do someting
}
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
final int pos =position;
holder.getId().setText(mDataset.get(position).get("id"));
holder.getItemname().setText(mDataset.get(position).get("name"));
//holder.getIvImage().setBackground(mDataset.get(position).get("icon"));
holder.cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(context,NewActivity.class);
intent.putExtra("yourValue", String.valueOf(mDataset.get(position).get(pos)));
ctx.startActivity(intent);
}
});
}
Remember to give reference to your cardview
cardView = (CardView)itemView.findViewById(R.id.cardview);
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()
This is my code.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.recycler_list, container, false);
recyclerView = (RecyclerView) v.findViewById(R.id.recycler_view);
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 3);
adapter = new FragmentBrandList.MyAdapter(Utility.getBrandMap(), getActivity());
recyclerView.setAdapter(adapter);
// asynchronous call
query.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
Brand brand = dataSnapshot1.getValue(Brand.class);
brandMap.put(brand.getId(), brand);
}
Utility.setBrandMap(brandMap);
adapter.notifyDataSetChanged();
}
#Override
public void onCancelled(DatabaseError error) {
// Failed to read value
Log.w(TAG, "Failed to read value.", error.toException());
Utility.displayToast("Failed to read value." + error.toException());
}
});
return v;
}
Initially Utility.getBrandMap() is null. so noting is displaying. but in asynchronous call I am getting and updating the value and calling adapter.notifyDataSetChanged(); but still it doesn't update UI.
What is wrong here?
Edit: Adapter code
private class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private List<Brand> brandList = new ArrayList<>();
private Context context;
public class MyViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
public MyViewHolder(View view) {
super(view);
imageView = (ImageView) view.findViewById(R.id.thumbnail);
}
}
public MyAdapter(Map<String, Brand> brands, Context context) {
//public MyAdapter(List<Brand> brands, Context context) {
this.brandList = new ArrayList<>(brandMap.values());
//this.brandList = brands;
this.context = context;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_brand, parent, false);
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
if (brandList != null && brandList.size() > 0) {
Brand brand = brandList.get(position);
Glide.with(context).load(String.valueOf(brand.getImage()))
.error(R.drawable.placeholder)
.placeholder(R.drawable.placeholder)
.into(holder.imageView);
}
}
#Override
public int getItemCount() {
return brandList.size();
}
}
Try this:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.recycler_list, container, false);
recyclerView = (RecyclerView) v.findViewById(R.id.recycler_view);
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 3);
adapter = new FragmentBrandList.MyAdapter(Utility.getBrandMap(), getActivity());
recyclerView.setAdapter(adapter);
// asynchronous call
query.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
Brand brand = dataSnapshot1.getValue(Brand.class);
brandMap.put(brand.getId(), brand);
}
adapter.setBrandMap(brandMap);
}
#Override
public void onCancelled(DatabaseError error) {
// Failed to read value
Log.w(TAG, "Failed to read value.", error.toException());
Utility.displayToast("Failed to read value." + error.toException());
}
});
return v;
}
And in adapter code:
private class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private List<Brand> brandList = new ArrayList<>();
private Context context;
public class MyViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
public MyViewHolder(View view) {
super(view);
imageView = (ImageView) view.findViewById(R.id.thumbnail);
}
}
public MyAdapter(Map<String, Brand> brands, Context context) {
//public MyAdapter(List<Brand> brands, Context context) {
this.brandList = new ArrayList<>(brandMap.values());
//this.brandList = brands;
this.context = context;
}
public void setBrandMap(Map<String, Brand> brandMap){
this.brandList = new ArrayList<>(brandMap.values());
notifyDataSetChanged();
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_brand, parent, false);
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
if (brandList != null && brandList.size() > 0) {
Brand brand = brandList.get(position);
Glide.with(context).load(String.valueOf(brand.getImage()))
.error(R.drawable.placeholder)
.placeholder(R.drawable.placeholder)
.into(holder.imageView);
}
}
#Override
public int getItemCount() {
return brandList.size();
}
}
You're passing an empty Map to the constructor of your MyAdapter. Once the asynchronous query is finished the Map is filled however the brandList in your adapter doesn't know anything about the new data. So what you want to do is to add the new items to the List inside the adapter.
Add the following method to the adapter:
public void addValues(Map<String, Brand> brands){
brandList.clear();
brandList.addAll(brands.values());
notifyDataSetChanged();
}
and call it once the asynchronous query is finished.