Recycler in Fragment is no showing - android-recyclerview

Question

I have been making an app that uses a recycler view in a fragment. how the contents of the recycler view have not been showing up. I am not sure what I have done wrong as the app does not crash when it is run. Please tell me what i need to do.
fragment_home.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"`enter code here`
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".Fragments.Home_Fragment">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/cetagory_recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorAccent"
android:elevation="3dp" />
</FrameLayout>
Home_Fragment.java
private RecyclerView categoryRecyclerView;
private CategoryAdapter categoryAdapter;
public Home_Fragment() {
// 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_home, container, false);
categoryRecyclerView = view.findViewById(R.id.cetagory_recyclerview);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
categoryRecyclerView.setLayoutManager(layoutManager);
List<CategoryModel> categoryModelList = new ArrayList<CategoryModel>();
categoryModelList.add(new CategoryModel("Link","Home"));
categoryModelList.add(new CategoryModel("Link","Electronicse"));
categoryModelList.add(new CategoryModel("Link","Garments"));
categoryModelList.add(new CategoryModel("Link","Fashion"));
categoryModelList.add(new CategoryModel("Link","Toys"));
categoryModelList.add(new CategoryModel("Link","Sporte"));
categoryModelList.add(new CategoryModel("Link","Furniture"));
categoryModelList.add(new CategoryModel("Link","Wall Art"));
categoryModelList.add(new CategoryModel("Link","Appliance"));
categoryAdapter = new CategoryAdapter(categoryModelList);
categoryRecyclerView.setAdapter(categoryAdapter);
categoryAdapter.notifyDataSetChanged();
return view;
}
CategoryModel.java
private String categoryItemIconLink;
private String categoryName;
public CategoryModel(String categoryItemIconLink, String categoryName) {
this.categoryItemIconLink = categoryItemIconLink;
this.categoryName = categoryName;
}
public String getCategoryItemIconLink() {
return categoryItemIconLink;
}
public void setCategoryItemIconLink(String categoryItemIconLink) {
this.categoryItemIconLink = categoryItemIconLink;
}
public String getCategoryName() {
return categoryName;
}
public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}
CategoryAdapter.java
Context context;
private List<CategoryModel> categoryModelList = new ArrayList<CategoryModel>();
public CategoryAdapter(List<CategoryModel> categoryModerList) {
this.context = context;
this.categoryModelList = categoryModelList;
}
#NonNull
#Override
public CategoryAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int viewType) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.category_item, viewGroup, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull CategoryAdapter.ViewHolder holder, int position) {
String icon = categoryModelList.get(position).getCategoryItemIconLink();
String name = categoryModelList.get(position).getCategoryName();
holder.setCategoryName(name);
}
#Override
public int getItemCount() {
return categoryModelList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private ImageView categoryIcon;
private TextView categoryName;
public ViewHolder(#NonNull View itemView) {
super(itemView);
categoryIcon = itemView.findViewById(R.id.category_item_icon);
categoryName = itemView.findViewById(R.id.category_item_name);
}
private void setCategoryIcon() {
//Todo: set categoryIcone here
}
private void setCategoryName(String name) {
categoryName.setText(name);
}
}

Answer 1

You have not initialized your variables inside your adapter
Replace this...
public CategoryAdapter(List<CategoryModel> categoryModerList) {
this.context = context;
this.categoryModelList = categoryModelList;
}
With this..
public CategoryAdapter(Context context,List<CategoryModel> categoryModelList) {
this.context = context;
this.categoryModelList = categoryModelList;
}
then inside your fragment where you are calling adapters constructor add change this line.
from..
categoryAdapter = new CategoryAdapter(categoryModelList);
to..
categoryAdapter = new CategoryAdapter(getContext(),categoryModelList);