how to create recycler view list?

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We can start creating Row (Item repeatedly holder use to create view) xml file then create adapter For Recycler View.

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Row.xml

<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_margin="@dimen/dim_3dp">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <ImageView
            android:layout_width="@dimen/dim_80dp"
            android:layout_height="@dimen/dim_80dp"
            android:layout_margin="@dimen/dim_5dp"
            android:src="@drawable/logo"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            android:id="@+id/row_service_vertical_image"
            />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:layout_marginStart="@dimen/dim_85dp"
            app:layout_constraintTop_toTopOf="parent"
            android:layout_marginTop="@dimen/dim_5dp"
            android:layout_marginEnd="@dimen/dim_5dp"
            android:layout_marginBottom="@dimen/dim_5dp"
            app:layout_constraintStart_toEndOf="@+id/row_service_vertical_image">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="bottom"
                >

                <TextView
                    android:id="@+id/row_service_vertical_name_text_view"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentStart="true"
                    android:layout_marginStart="@dimen/dim_5dp"
                    android:layout_marginEnd="@dimen/dim_5dp"
                    android:gravity="bottom"
                    android:paddingTop="@dimen/dim_5dp"
                    android:text="@string/app_name"
                    android:textStyle="bold"
                    android:maxLines="2"
                    android:textColor="@color/black"
                    android:textSize="@dimen/dim_16dp" />

            </RelativeLayout>


            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/category"
                android:textSize="@dimen/dim_14dp"
                android:id="@+id/row_service_vertical_category_text_view"
                android:layout_marginTop="@dimen/dim_3dp"
                android:layout_marginStart="@dimen/dim_5dp"
                android:layout_marginEnd="@dimen/dim_5dp"
                />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Business Name"
                android:textSize="@dimen/dim_14dp"
                android:id="@+id/row_service_vertical_business_name_text_view"
                android:layout_marginTop="@dimen/dim_3dp"
                android:layout_marginStart="@dimen/dim_5dp"
                android:layout_marginEnd="@dimen/dim_5dp"
                />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/row_service_horizontal_category_text_view"
                android:orientation="horizontal">

                <TextView
                    android:id="@+id/row_service_horizontal_discounted_price_text_view"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="@dimen/dim_5dp"
                    android:layout_marginTop="@dimen/dim_2dp"
                    android:layout_marginEnd="@dimen/dim_5dp"
                    android:layout_marginBottom="@dimen/dim_2dp"
                    android:textColor="@color/black"
                    android:text="₹1200"
                    android:textSize="@dimen/dim_14dp"
                    android:textStyle="bold" />
                <TextView
                    android:id="@+id/row_service_horizontal_actual_price_text_view"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="@dimen/dim_2dp"
                    android:layout_marginTop="@dimen/dim_2dp"
                    android:layout_marginEnd="@dimen/dim_5dp"
                    android:text="1300"
                    android:textSize="@dimen/dim_14dp"
                    android:layout_marginBottom="@dimen/dim_2dp"
                    android:textColor="@color/text_color_black_low"
                    />

            </LinearLayout>

        </LinearLayout>

        <TextView
            android:id="@+id/product_discount_text_view"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:layout_marginEnd="@dimen/dim_8dp"
            android:background="@color/theme_color"
            android:elevation="@dimen/dim_2dp"
            android:paddingStart="@dimen/dim_5dp"
            android:paddingTop="@dimen/dim_3dp"
            android:paddingEnd="@dimen/dim_5dp"
            android:textAllCaps="true"
            android:text="10% OFF"
            android:textSize="@dimen/dim_12dp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            android:textColor="@color/white"
            android:paddingBottom="@dimen/dim_3dp"
            />
    </androidx.constraintlayout.widget.ConstraintLayout>

</com.google.android.material.card.MaterialCardView>


================================================

MainActivity.java



VerticalServiceAdapter verticalServiceAdapter = new VerticalServiceAdapter(this,listItems);



LinearLayoutManager layoutManager = new LinearLayoutManager(AllSearchActivity.this, LinearLayoutManager.VERTICAL, false); binding.allItemRecyclerView.setLayoutManager(layoutManager); binding.allItemRecyclerView.setAdapter(verticalServiceAdapter);



===================================================


Adapter class -> AnyNameAdapter.java

public class VerticalServiceAdapter extends RecyclerView.Adapter<VerticalServiceAdapter.VerticalServiceHolder> {
    private Context context;
    private List<ProductServiceSearchResponse.Result.DataItem> serviceList;
    DecimalFormat formatter ;


    public VerticalServiceAdapter(Context context, List<ProductServiceSearchResponse.Result.DataItem> serviceList) {
        this.context = context;
        this.serviceList = serviceList;
        formatter = new DecimalFormat("##,##,##,##,##,##,##0");

    }

    @NonNull
    @NotNull
    @Override
    public VerticalServiceHolder onCreateViewHolder(@NonNull @NotNull ViewGroup parent, int viewType) {
        RowVerticalServiceListSearchBinding binding = RowVerticalServiceListSearchBinding.inflate(LayoutInflater.from(context),parent,false);
        return new VerticalServiceHolder(binding);
    }

    @Override
    public void onBindViewHolder(@NonNull @NotNull VerticalServiceHolder holder, int position) {
        ProductServiceSearchResponse.Result.DataItem data = serviceList.get(position);

        Glide.with(context).load(data.getThumbnailImg()).into(holder.binding.rowServiceVerticalImage);
        holder.binding.rowServiceVerticalNameTextView.setText(data.getName());
        holder.binding.rowServiceVerticalCategoryTextView.setText(data.getCategoryName());
        holder.binding.rowServiceVerticalBusinessNameTextView.setText(data.getBusinessName());
        holder.binding.rowServiceHorizontalDiscountedPriceTextView.setText("₹"+formatter.format(data.getDiscountedPrice()));
        holder.binding.rowServiceHorizontalActualPriceTextView.setText(String.valueOf(data.getUnitPrice()));
        holder.binding.rowServiceHorizontalActualPriceTextView.setPaintFlags(holder.binding.rowServiceHorizontalActualPriceTextView.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);

        if(data.getDiscountType()!=null) {
            if (data.getDiscountType().equalsIgnoreCase("percent") && data.getDiscount() != 0) {
                CustomMethods.setTextData(holder.binding.productDiscountTextView, data.getDiscount() + "% OFF");
            } else if (data.getDiscountType().equalsIgnoreCase("amount") && data.getDiscount() != 0) {
                CustomMethods.setTextData(holder.binding.productDiscountTextView, "₹" + formatter.format(data.getDiscount()) + " OFF");
            } else {
                holder.binding.productDiscountTextView.setVisibility(View.GONE);
            }
        }
        else{
            holder.binding.productDiscountTextView.setVisibility(View.GONE);
        }
        if(data.getDiscount()==0){
            holder.binding.rowServiceHorizontalActualPriceTextView.setVisibility(View.GONE);
        }
    }

    @Override
    public int getItemCount() {
        return serviceList.size();
    }

    public class VerticalServiceHolder extends RecyclerView.ViewHolder {
        RowVerticalServiceListSearchBinding binding;
        public VerticalServiceHolder(@NonNull @NotNull RowVerticalServiceListSearchBinding binding) {
            super(binding.getRoot());
            this.binding = binding;

            binding.getRoot().setOnClickListener(v->{
                Intent intent = new Intent(context, ServiceDetailsActivity.class);
                intent.putExtra("name",String.valueOf(serviceList.get(getAdapterPosition()).getName()));
                intent.putExtra("id",String.valueOf(serviceList.get(getAdapterPosition()).getId()));
                context.startActivity(intent);

            });


        }
    }
}

extends RecyclerView.Adapter<VerticalServiceAdapter.VerticalServiceHolder> {
    private Context context;
    private List<ProductServiceSearchResponse.Result.DataItem> serviceList;
    DecimalFormat formatter ;


    public VerticalServiceAdapter(Context context, List<ProductServiceSearchResponse.Result.DataItem> serviceList) {
        this.context = context;
        this.serviceList = serviceList;
        formatter = new DecimalFormat("##,##,##,##,##,##,##0");

    }

    @NonNull
    @NotNull
    @Override
    public VerticalServiceHolder onCreateViewHolder(@NonNull @NotNull ViewGroup parent, int viewType) {
        RowVerticalServiceListSearchBinding binding = RowVerticalServiceListSearchBinding.inflate(LayoutInflater.from(context),parent,false);
        return new VerticalServiceHolder(binding);
    }

    @Override
    public void onBindViewHolder(@NonNull @NotNull VerticalServiceHolder holder, int position) {
        ProductServiceSearchResponse.Result.DataItem data = serviceList.get(position);

        Glide.with(context).load(data.getThumbnailImg()).into(holder.binding.rowServiceVerticalImage);
        holder.binding.rowServiceVerticalNameTextView.setText(data.getName());
        holder.binding.rowServiceVerticalCategoryTextView.setText(data.getCategoryName());
        holder.binding.rowServiceVerticalBusinessNameTextView.setText(data.getBusinessName());
        holder.binding.rowServiceHorizontalDiscountedPriceTextView.setText("₹"+formatter.format(data.getDiscountedPrice()));
        holder.binding.rowServiceHorizontalActualPriceTextView.setText(String.valueOf(data.getUnitPrice()));
        holder.binding.rowServiceHorizontalActualPriceTextView.setPaintFlags(holder.binding.rowServiceHorizontalActualPriceTextView.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);

        if(data.getDiscountType()!=null) {
            if (data.getDiscountType().equalsIgnoreCase("percent") && data.getDiscount() != 0) {
                CustomMethods.setTextData(holder.binding.productDiscountTextView, data.getDiscount() + "% OFF");
            } else if (data.getDiscountType().equalsIgnoreCase("amount") && data.getDiscount() != 0) {
                CustomMethods.setTextData(holder.binding.productDiscountTextView, "₹" + formatter.format(data.getDiscount()) + " OFF");
            } else {
                holder.binding.productDiscountTextView.setVisibility(View.GONE);
            }
        }
        else{
            holder.binding.productDiscountTextView.setVisibility(View.GONE);
        }
        if(data.getDiscount()==0){
            holder.binding.rowServiceHorizontalActualPriceTextView.setVisibility(View.GONE);
        }
    }

    @Override
    public int getItemCount() {
        return serviceList.size();
    }

    public class VerticalServiceHolder extends RecyclerView.ViewHolder {
        RowVerticalServiceListSearchBinding binding;
        public VerticalServiceHolder(@NonNull @NotNull RowVerticalServiceListSearchBinding binding) {
            super(binding.getRoot());
            this.binding = binding;

            binding.getRoot().setOnClickListener(v->{
                Intent intent = new Intent(context, ServiceDetailsActivity.class);
                intent.putExtra("name",String.valueOf(serviceList.get(getAdapterPosition()).getName()));
                intent.putExtra("id",String.valueOf(serviceList.get(getAdapterPosition()).getId()));
                context.startActivity(intent);

            });


        }
    }
}
Recycler View Adapter

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