MainActivity.class
-------------------------------------
package com.labs.ankitt.multichoice;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button buttonClick;
    private List<String> foodAllergy;
    private CustomAdapter adapter;
    private RecyclerView.LayoutManager layoutManager;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        buttonClick = (Button) findViewById(R.id.buttonFoodAllergy);
        buttonClick.setOnClickListener(this);

        //arraylist
        foodAllergy = new ArrayList<>();
        String[] food = getResources().getStringArray(R.array.food_allergy);
        Collections.addAll(foodAllergy, food);
        Log.i("TAG", "onCreate: " + food.length);
    }

    @Override
    public void onClick(View v) {
        if (v == buttonClick) {
            AlertDialog.Builder builder = new AlertDialog.Builder(this);

            LayoutInflater inflater = getLayoutInflater();
            View dialogView = (View) inflater.inflate(R.layout.custom_alert_dialog, null);
            builder.setView(dialogView);


            AlertDialog dialog = builder.create();

            dialog.show();
            RecyclerView rv = (RecyclerView) dialogView.findViewById(R.id.recycler_data);
            rv.setLayoutManager(new LinearLayoutManager(this));
            adapter= new CustomAdapter(this, foodAllergy);
            rv.setAdapter(adapter);
        }
    }
}



Adapter
---------------------------------
package com.labs.ankitt.multichoice;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;

import java.util.List;

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.DataViewHolder> {

    private Context context;
    private List<String> foodAllergy;

    public CustomAdapter(Context context, List<String> foodAllergy) {
        this.context = context;
        this.foodAllergy = foodAllergy;
    }

    @NonNull
    @Override
    public CustomAdapter.DataViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View inflater = LayoutInflater.from(context).inflate(R.layout.item_list_data, parent, false);
        return new DataViewHolder(inflater);
    }

    @Override
    public void onBindViewHolder(@NonNull CustomAdapter.DataViewHolder holder, int position) {
        holder.checkBoxData.setText(foodAllergy.get(position).toString());
    }

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

    public class DataViewHolder extends RecyclerView.ViewHolder {

        private CheckBox checkBoxData;

        public DataViewHolder(View itemView) {
            super(itemView);
            checkBoxData = (CheckBox) itemView.findViewById(R.id.checkbox_data);
        }
    }
}
---------------------------------------
activity_main

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/buttonFoodAllergy"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="33dp"
        android:text="Select Food Allergy"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

---------------------------------------------------
custom_dialog

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_data"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

-------------------------------------------------------
item_data
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <CheckBox
        android:id="@+id/checkbox_data"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
-------------------

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="food_allergy">
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
        <item>Ankit</item>
    </string-array>
</resources>