How to Implement Endless List With RecyclerView in Android

In this android programming source code example, we are going to explore how to implement endless list with RecyclerView in android.

Below is a step by step source code to implement endless list with RecyclerView in android.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

MainActivity.java

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class RecyclerViewActivity8 extends AppCompatActivity {
    
    private RecyclerView list;
    
    private adapter recyclerAdapter;
   
    private LinearLayoutManager layoutManager;
   
    private int previousTotal = 0;
   
    private boolean loading = false;
   
    private int visibleThreshold = 5;
   
    private int lastVisibleItemPosition, visibleItemCount, totalItemCount;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycler_view8);
        list = (RecyclerView) findViewById(R.id.list);

        //Data
        ArrayList<String> country = new ArrayList<>();
        country.add("Nigeria");
        country.add("China");
        country.add("USA");
        country.add("Ghana");
        country.add("Canada");
        country.add("Finland");
        country.add("Denmark");
        country.add("Argentina");
        country.add("Andorra");
        country.add("Angola");
        country.add("Benin");
        country.add("Brazil");
        country.add("Chile");
        country.add("Denmark");
        country.add("Egypt");
        country.add("Fiji");
        country.add("France");
        country.add("Togo");

        layoutManager = new LinearLayoutManager(this);
        list.setLayoutManager(layoutManager);
        recyclerAdapter = new adapter(RecyclerViewActivity8.this, country);
        list.addItemDecoration(new DividerItemDecoration(list.getContext(), layoutManager.getOrientation()));
        list.setAdapter(recyclerAdapter);
        list.addOnScrollListener(onScrollListener);
    }

    private RecyclerView.OnScrollListener onScrollListener = new RecyclerView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);
        }
        @Override
        public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            visibleItemCount = layoutManager.getChildCount();
            totalItemCount = layoutManager.getItemCount();
            lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();

            if(!loading && lastVisibleItemPosition == totalItemCount - 1){
                Toast.makeText(RecyclerViewActivity8.this, "The end, load next data", Toast.LENGTH_SHORT).show();
                loading = true;
            }
            }
    };

    private class adapter extends RecyclerView.Adapter<adapter.myViewHolder> {
        Context context;
        List<String> mData;

        public adapter(Context context, List<String> data) {
            this.context = context;
            this.mData = data;
        }

        @Override
        public adapter.myViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(context).inflate(R.layout.recyclerview_adapter1, parent, false);
            return new myViewHolder(view);
        }

        @Override
        public void onBindViewHolder(adapter.myViewHolder holder, int position) {
            holder.country.setText(mData.get(position));
        }

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

        public class myViewHolder extends RecyclerView.ViewHolder {
            TextView country;

            public myViewHolder(View itemView) {
                super(itemView);
                country = (TextView) itemView.findViewById(R.id.country);
            }
        }
    }
}

android endless scrolling

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