package com.appyvet.rangebarsample;

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
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.view.Window;

public class RecyclerViewActivity extends Activity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Removes title bar and sets content view
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_recyclerview);
        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(new Adapter());
    }

    public static class Adapter extends RecyclerView.Adapter<VH> {

        @NonNull
        @Override
        public VH onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
            return new VH(LayoutInflater.from(viewGroup.getContext())
                    .inflate(R.layout.recyclerview_item, viewGroup, false));
        }

        @Override
        public void onBindViewHolder(@NonNull VH vh, int i) {

        }

        @Override
        public int getItemCount() {
            return 100;
        }
    }

    public static class VH extends RecyclerView.ViewHolder {

        public VH(@NonNull View itemView) {
            super(itemView);
        }
    }
}

package com.appyvet.rangebarsample;

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
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.view.Window;

public class RecyclerViewActivity extends Activity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Removes title bar and sets content view
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_recyclerview);
        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        Adapter adapter = new Adapter();
        adapter.setHasStableIds(true);
        recyclerView.setAdapter(adapter);
    }

    public static class Adapter extends RecyclerView.Adapter<VH> {

        @NonNull
        @Override
        public VH onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
            return new VH(LayoutInflater.from(viewGroup.getContext())
                    .inflate(R.layout.recyclerview_item, viewGroup, false));
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public int getItemViewType(int position) {
            return position;
        }

        @Override
        public void onBindViewHolder(@NonNull VH vh, int i) {

        }

        @Override
        public int getItemCount() {
            return 50;
        }
    }

    public static class VH extends RecyclerView.ViewHolder {

        public VH(@NonNull View itemView) {
            super(itemView);
        }
    }
}

Use stable ids for the RecyclerView adapter