Recycle Listview with dynamic listview raw

Recycle listview is the listview better than a simple list view now here is the code to create Recycle listview with dynamic listview raw. 

First need to add Recycle listview library in build.gradle(Module:app) file

dependencies {

implementation 'androidx.recyclerview:recyclerview:1.1.0'

}


Then in activity_main.xml file add below code

<androidx.recyclerview.widget.RecyclerView

 android:id="@+id/rvalphabets"  

 android:layout_width="match_parent"

 android:layout_height="match_parent"/>

Then make new xml file recycleview_row.xml and add below code

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"

 android:layout_width="match_parent"    

 android:layout_height="wrap_content" 

 android:orientation="horizontal"

 android:padding="10dp"    

 android:layout_gravity="center"    

 android:gravity="center">

 <TextView android:id="@+id/tvandroidversionname"

  android:layout_width="match_parent"        

  android:layout_height="wrap_content"        

  android:layout_gravity="center"        

  android:gravity="center"        
  android:text=""        

  android:textSize="35sp"        

  android:textStyle="bold"        

  android:textColor="@color/colorPrimary"/>
    

 <ImageView android:id="@+id/imgview"

  android:layout_width="200dp"        

  android:layout_height="200dp"        

  android:layout_gravity="center"        

  android:gravity="center"        

  android:visibility="gone"/>
</LinearLayout>

Then make new xml file customdialog.xml and add below code

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="wrap_content"    

    android:layout_height="200dp"    

    android:padding="10dp"    

    android:background="@android:color/white">

    <FrameLayout android:id="@+id/frmcustom"

      android:layout_width="match_parent"        

      android:layout_height="200dp"        

      android:background="@color/colorPrimary">
    <ImageButton  android:id="@+id/closebtn"        

         android:layout_width="25dp"        

         android:layout_height="25dp"        

         android:layout_gravity="top|right"        

         android:layout_margin="10dp"
        android:background="@android:drawable/ic_menu_close_clear_cancel"/>

    <TextView  android:id="@+id/tvdialogName"        

       android:layout_width="match_parent"        

       android:layout_height="wrap_content"        

       android:layout_gravity="center"        

       android:gravity="center"        

       android:layout_below="@+id/closebtn"        

       android:text=""        
       android:textSize="25sp"        

       android:padding="10dp"        

       android:textStyle="bold"        

       android:layout_marginTop="20dp"        

       android:textColor="@android:color/white"/>
    </FrameLayout>
</RelativeLayout>

And then make one Adapter for recycle list view 
MyRecycleViewAdapter.java and add below code

import android.content.Context;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

public class MyRecyclerViewAdapter extends 

RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {

    private List<String> mData;
    private LayoutInflater mInflater;
    private ItemClickListener mClickListener;
    Context mContext;

    // data is passed into the constructor    

MyRecyclerViewAdapter(Context context, List<String> data) {
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
        mContext = context;
    }

    // inflates the row layout from xml when needed    

@Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.recyclerview_row, parent, false);
        return new ViewHolder(view);
    }

    // binds the data to the TextView in each row    

@Override    public void onBindViewHolder(ViewHolder holder, int position) {
        String alphabet = mData.get(position);
        holder.myTextView.setText(alphabet);
    }

    // total number of rows    @Override    public int getItemCount() {
        return mData.size();
    }


    // stores and recycles views as they are scrolled off screen    

public class ViewHolder extends RecyclerView.ViewHolder 

implements View.OnClickListener {
        TextView myTextView;

        ViewHolder(View itemView) {
            super(itemView);
            myTextView = itemView.findViewById(R.id.tvAlphabetsName);
            itemView.setOnClickListener(this);

        }

        @Override        public void onClick(View view) {
            if (mClickListener != null) 

mClickListener.onItemClick(view, getAdapterPosition());
        }
    }

    // convenience method for getting data at click position    

String getItem(int id) {
        return mData.get(id);
    }

    // allows clicks events to be caught    

void setClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }

    // parent activity will implement this method to respond to click events    

public interface ItemClickListener {
        void onItemClick(View view, int position);
    }
}

And final code in MainActivity.java

import android.app.Dialog;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.view.View;
import android.widget.ImageButton;
import android.widget.TextView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements 

MyRecyclerViewAdapter.ItemClickListener{

    Context mcontext;
    MyRecyclerViewAdapter adapter;
    String gettext;

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

        mcontext =  MainActivity.this;

        // data to populate the RecyclerView with       

 ArrayList<String> alphabetsNames = new ArrayList<>();
        alphabetsNames.add("Android Cupcake.");
        alphabetsNames.add("Android Donut.");
        alphabetsNames.add("Android Eclair.");
        alphabetsNames.add("Android Froyo.");
        alphabetsNames.add("Android Gingerbread.");
        alphabetsNames.add("Android Honeycomb.");
        alphabetsNames.add("Android Ice Cream Sandwich.");
        alphabetsNames.add("Android Jelly Bean.");

        alphabetsNames.add("Android KitKat");
        alphabetsNames.add("Android Lollipop");
        alphabetsNames.add("Android Marshmallow");
        alphabetsNames.add("Android Nougat");
        alphabetsNames.add("Android Oreo");
        alphabetsNames.add("Android Pie");

        // set up the RecyclerView       

 RecyclerView recyclerView = findViewById(R.id.tvandroidversionname);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        adapter = new MyRecyclerViewAdapter(this, alphabetsNames);
        adapter.setClickListener(this);
        recyclerView.setAdapter(adapter);

    }
    @Override    public void onItemClick(View view, int position) {

        gettext = adapter.getItem(position);
        // custom dialog        final Dialog dialog = new Dialog(mcontext);
        dialog.setContentView(R.layout.customdialog);
        // set the custom dialog components - text, image and button        

TextView text = (TextView) dialog.findViewById(R.id.tvdialogName);
        ImageButton closebtn = (ImageButton)dialog.findViewById(R.id.closebtn);
        text.setText(gettext);
        closebtn.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        dialog.show();

    }
}