Code to display ViewMore for RecyclerView list and click on ViewMore will launch full list Android

RestaurantTabFragment.java:

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.example.cbrecodingtest.R;
import com.example.cbrecodingtest.adapter.RestaurantsAdapter;
import com.example.cbrecodingtest.model.RestaurantsModel;
import com.example.cbrecodingtest.utils.Utils;

import java.util.ArrayList;

public class RestaurantTabFragment extends Fragment {

    private RecyclerView mRecyclerViewOpen , mRecyclerViewClosed;
    private RecyclerView.Adapter mRecyclerAdapter;
    private RelativeLayout mOpenLayout , mClosedLayout;
    private ImageView mOpenArrow , mClosedArrow;
    private TextView mViewMoreOpen , mViewMoreClosed;
    private ArrayList<RestaurantsModel> openList ,closedList;
    private View mLineView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.restaurant_tab_fragment, container, false);
        initViewIds(rootView);

        openList = (ArrayList<RestaurantsModel>) getArguments().getSerializable(Utils.RESTAURANT_LIST_KEY);
        //openList = new ArrayList<>();
        if(openList.size() == 0) {//open list is empty
            //Hide the open section
            mOpenLayout.setVisibility(View.GONE);
            mLineView.setVisibility(View.GONE);
        } else if(openList.size() > 4 ) {
            // if list of items more than 4 rows, then display only 4 rows with ViewMore text ..
            mOpenLayout.setVisibility(View.VISIBLE);
            mViewMoreOpen.setVisibility(View.VISIBLE);

            mRecyclerAdapter = new RestaurantsAdapter(openList.subList(0, 3), getActivity());
            mRecyclerViewOpen.setAdapter(mRecyclerAdapter);

        } else  {
            //Show open section and set adapter
            mOpenLayout.setVisibility(View.VISIBLE);
            mViewMoreOpen.setVisibility(View.GONE);
            mRecyclerAdapter = new RestaurantsAdapter(openList, getActivity());
            mRecyclerViewOpen.setAdapter(mRecyclerAdapter);
        }


        closedList = (ArrayList<RestaurantsModel>) getArguments().getSerializable(Utils.RESTAURANT_LIST_KEY);
        //closedList = new ArrayList<>(); //For empty list..
        if(closedList.size() == 0) {//closed list empty
            //Hide the closed section
            mClosedLayout.setVisibility(View.GONE);
        } else if(closedList.size() > 4) {
            // if list of items more than 4 rows, then display only 4 rows with ViewMore text ..
            mClosedLayout.setVisibility(View.VISIBLE);
            mViewMoreClosed.setVisibility(View.VISIBLE);
            mRecyclerAdapter = new RestaurantsAdapter(closedList.subList(0, 3), getActivity());
            mRecyclerViewClosed.setAdapter(mRecyclerAdapter);

        } else {
            //Show closed section and set Adapter
            mClosedLayout.setVisibility(View.VISIBLE);
            mViewMoreClosed.setVisibility(View.GONE);
            mRecyclerAdapter = new RestaurantsAdapter(closedList, getActivity());
            mRecyclerViewClosed.setAdapter(mRecyclerAdapter);
        }


        return  rootView;
    }

    private void initViewIds(View rootView) {

        mOpenLayout = rootView.findViewById(R.id.openLayout);
        mLineView = rootView.findViewById(R.id.lineView);
        mClosedLayout = rootView.findViewById(R.id.closedLayout);

        mRecyclerViewOpen = rootView.findViewById(R.id.recycler_view_open);
        mRecyclerViewClosed = rootView.findViewById(R.id.recycler_view_closed);

        mOpenArrow = rootView.findViewById(R.id.open_arrow);
        mOpenArrow.setOnClickListener(mOnClickListener);
        mClosedArrow = rootView.findViewById(R.id.closed_arrow);
        mClosedArrow.setOnClickListener(mOnClickListener);

        mViewMoreOpen = rootView.findViewById(R.id.viewMoreOpen);
        mViewMoreOpen.setOnClickListener(mOnClickListener);
        mViewMoreClosed = rootView.findViewById(R.id.viewMoreClosed);
        mViewMoreClosed.setOnClickListener(mOnClickListener);

        mRecyclerViewOpen.setLayoutManager(new LinearLayoutManager(getActivity()));
        mRecyclerViewClosed.setLayoutManager(new LinearLayoutManager(getActivity()));
    }

    private View.OnClickListener mOnClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            switch (view.getId()) {
                case R.id.open_arrow:
                    if (mRecyclerViewOpen.getVisibility() == View.VISIBLE) {
                        // Recycler view visible
                        mRecyclerViewOpen.setVisibility(View.GONE);
                        mViewMoreOpen.setVisibility(View.GONE);
                        mOpenArrow.setBackgroundResource(R.drawable.arrow_down);
                    } else {
                        // Recycler view gone or invisible
                        mRecyclerViewOpen.setVisibility(View.VISIBLE);
                        mViewMoreOpen.setVisibility(View.VISIBLE);
                        mOpenArrow.setBackgroundResource(R.drawable.arrow_up);
                    }
                    break;

                case R.id.closed_arrow:
                    if (mRecyclerViewClosed.getVisibility() == View.VISIBLE) {
                        // Recycler view visible
                        mRecyclerViewClosed.setVisibility(View.GONE);
                        mViewMoreClosed.setVisibility(View.GONE);
                        mClosedArrow.setBackgroundResource(R.drawable.arrow_down);
                    } else {
                        // Recycler view gone or invisible
                        mRecyclerViewClosed.setVisibility(View.VISIBLE);
                        mViewMoreClosed.setVisibility(View.VISIBLE);
                        mClosedArrow.setBackgroundResource(R.drawable.arrow_up);
                    }
                    break;

                case R.id.viewMoreOpen:
                    //Hide closed list and display open list in full screen ..
                    /*mClosedLayout.setVisibility(View.GONE);
                    mViewMoreOpen.setVisibility(View.GONE);
                    mLineView.setVisibility(View.GONE);
                    mRecyclerAdapter = new RestaurantsAdapter(openList, getActivity());
                    mRecyclerViewOpen.setAdapter(mRecyclerAdapter);*/
                    launchFullFragment(openList , "open");
                    break;

                case R.id.viewMoreClosed:
                    //Hide open list and display closed list in full screen ..
                   /* mOpenLayout.setVisibility(View.GONE);
                    mViewMoreClosed.setVisibility(View.GONE);
                    mLineView.setVisibility(View.GONE);
                    mRecyclerAdapter = new RestaurantsAdapter(closedList, getActivity());
                    mRecyclerViewClosed.setAdapter(mRecyclerAdapter);*/

                    launchFullFragment(closedList , "close");
                    break;
            }
        }
    };


    private void launchFullFragment(ArrayList<RestaurantsModel> list , String title) {
        //code to launch fragment in fullscreen

        Bundle bundle = new Bundle();
        bundle.putSerializable("list", list);
        bundle.putString("title", title);

        ViewMoreFragment nextFrag= new ViewMoreFragment();
        nextFrag.setArguments(bundle);
        getActivity().getSupportFragmentManager().beginTransaction()
                .replace(R.id.mainActivityView, nextFrag, "FragmentTag")
                .addToBackStack(null)
                .commit();
    }
}


restaurant_tab_fragment.xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/restTabView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <RelativeLayout
                android:id="@+id/openLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp">

                <TextView
                    android:id="@+id/openViewTitle"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="10dp"
                    android:text="Open"
                    android:textAppearance="@style/TextAppearance.AppCompat.Headline"
                    android:textSize="18sp"
                    android:textStyle="bold" />

                <ImageView
                    android:id="@+id/open_arrow"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:layout_marginTop="10dp"
                    android:background="@drawable/arrow_up" />

                <!-- A RecyclerView with some commonly used attributes -->
                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/recycler_view_open"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/openViewTitle"
                    android:layout_marginTop="10dp"
                    android:scrollbars="vertical" />

                <TextView
                    android:id="@+id/viewMoreOpen"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="View More"
                    android:textStyle="bold"
                    android:visibility="gone"
                    android:textColor="@color/red"
                    android:gravity="center_horizontal"
                    android:layout_marginTop="10dp"
                    android:layout_marginBottom="10dp"
                    android:layout_below="@+id/recycler_view_open"
                    android:textAppearance="@style/TextAppearance.AppCompat.Headline"/>
            </RelativeLayout>


            <View
                android:id="@+id/lineView"
                android:layout_width="match_parent"
                android:layout_height="8dp"
                android:layout_marginTop="10dp"
                android:background="#cecdcb" />


            <RelativeLayout
                android:id="@+id/closedLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp">

                <TextView
                    android:id="@+id/closedViewTitle"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="10dp"
                    android:text="Closed"
                    android:textAppearance="@style/TextAppearance.AppCompat.Headline"
                    android:textSize="18sp"
                    android:textStyle="bold" />

                <ImageView
                    android:id="@+id/closed_arrow"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:layout_marginTop="10dp"
                    android:background="@drawable/arrow_up" />

                <!-- A RecyclerView with some commonly used attributes -->
                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/recycler_view_closed"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/closedViewTitle"
                    android:layout_marginTop="10dp"
                    android:scrollbars="vertical" />

                <TextView
                    android:id="@+id/viewMoreClosed"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="View More"
                    android:textStyle="bold"
                    android:visibility="gone"
                    android:textColor="@color/red"
                    android:gravity="center_horizontal"
                    android:layout_marginTop="10dp"
                    android:layout_marginBottom="10dp"
                    android:layout_below="@+id/recycler_view_closed"
                    android:textAppearance="@style/TextAppearance.AppCompat.Headline"/>
            </RelativeLayout>


        </LinearLayout>
    </ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>


ViewMoreFragment.java:
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.widget.Toolbar;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.example.cbrecodingtest.MainActivity;
import com.example.cbrecodingtest.R;
import com.example.cbrecodingtest.adapter.RestaurantsAdapter;
import com.example.cbrecodingtest.model.RestaurantsModel;

import java.util.ArrayList;

public class ViewMoreFragment extends Fragment{

    private RecyclerView mRecyclerView;
    ArrayList<RestaurantsModel> arrayList;
    RecyclerView.LayoutManager mLayoutManager;
    private RecyclerView.Adapter mRecyclerAdapter;
    private Toolbar toolbar;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.view_more_fragment, container, false);

        toolbar = rootView.findViewById(R.id.toolbar);

        ((MainActivity) getActivity()).setSupportActionBar(toolbar);

        ((MainActivity) getActivity()).getSupportActionBar().setDisplayShowHomeEnabled(true);
        ((MainActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // remove the back button
                ((MainActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(false);
                ((MainActivity) getActivity()).getSupportActionBar().setDisplayShowHomeEnabled(false);
                getActivity().onBackPressed();
            }
        });

        if(getArguments() != null) {
            arrayList = (ArrayList<RestaurantsModel>)getArguments().getSerializable("list");
            toolbar.setTitle(getArguments().getString("title"));
        }

        initViewIds(rootView);

        return rootView;
    }

    private void initViewIds(View rootView) {
        mLayoutManager = new LinearLayoutManager(getActivity());
        mRecyclerView = rootView.findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerAdapter = new RestaurantsAdapter(arrayList, getActivity());
        mRecyclerView.setAdapter(mRecyclerAdapter);
    }
}

view_more_fragment.xml :
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="@color/white">

    <include
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        layout="@layout/app_bar"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"/>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/closedViewTitle"
        android:layout_marginTop="10dp"
        android:scrollbars="vertical"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/toolbar"/>

</androidx.constraintlayout.widget.ConstraintLayout>


app_bar.xml :
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    app:theme="@style/MyToolbarTheme"
    app:title="@string/title" />