Android RecyclerView DividerItemDecoration

package zhangphil.book;

import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
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;

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mRecyclerView = findViewById(R.id.recycler_view);

        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getApplicationContext());
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        mRecyclerView.setLayoutManager(linearLayoutManager);

        RecyclerViewAdapter mAdapter = new RecyclerViewAdapter();
        mRecyclerView.setAdapter(mAdapter);

        DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(getApplicationContext(), DividerItemDecoration.VERTICAL);
        dividerItemDecoration.setDrawable(new ColorDrawable(ContextCompat.getColor(getApplicationContext(), android.R.color.darker_gray)));

        mRecyclerView.addItemDecoration(dividerItemDecoration);
    }

    private class RecyclerViewAdapter extends RecyclerView.Adapter {
        @NonNull
        @Override
        public RecyclerViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(getApplicationContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
            RecyclerViewHolder holder = new RecyclerViewHolder(view);
            return holder;
        }

        @Override
        public void onBindViewHolder(@NonNull RecyclerViewHolder holder, int position) {
            holder.text1.setText(position + "");
        }

        @Override
        public int getItemCount() {
            return Integer.MAX_VALUE;
        }
    }

    private class RecyclerViewHolder extends RecyclerView.ViewHolder {
        public TextView text1;

        public RecyclerViewHolder(View itemView) {
            super(itemView);
            text1 = itemView.findViewById(android.R.id.text1);
        }
    }
}