simple recyclerview android example with source code

 How to use recyclerView in android studio

recyclerView widget is a viewGroup that is the most powerful tool in android.

It is a very useful tool to display items in recyclerViewview.

In this blog we using recyclerView, also we will use adapter,viewholder and number of data.

All data display in a single XML file so also we will create a single textview data file.

MainActivity.java

package com.pd.recyclerview;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

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

        MyData[] myData = new MyData[]{
                new MyData("account balance", R.drawable.ic_baseline_account_balance_24),
                new MyData("photo", R.drawable.ic_baseline_add_a_photo_24),
                new MyData("alert", R.drawable.ic_baseline_add_alert_24),
                new MyData("box", R.drawable.ic_baseline_add_box_24),
                new MyData("call", R.drawable.ic_baseline_add_ic_call_24),
                new MyData("shopping", R.drawable.ic_baseline_add_shopping_cart_24),
                new MyData("car", R.drawable.ic_baseline_electric_car_24),
                new MyData("check", R.drawable.ic_baseline_fact_check_24),
                new MyData("translate", R.drawable.ic_baseline_g_translate_24),


        };
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        MyAdapter myAdapter = new MyAdapter(myData);
        recyclerView.setAdapter(myAdapter);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
    }
}

activity_main.java

<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView 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:orientation="vertical"
    android:id="@+id/recyclerview"
    tools:context=".MainActivity">

</androidx.recyclerview.widget.RecyclerView>

Now Create an Adapter class named 

MyAdapter.java

package com.pd.recyclerview;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private MyData[] mylist;

    public MyAdapter(MyData[] mylist) {
        this.mylist = mylist;
    }

    @NonNull
    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View item = layoutInflater.inflate(R.layout.singledata, parent, false);
        ViewHolder viewHolder = new ViewHolder(item);

        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull MyAdapter.ViewHolder holder, int position) {

        final MyData myData = mylist[position];
        holder.textView.setText(mylist[position].getName());
        holder.imageView.setImageResource(mylist[position].getImages());
        holder.relativeLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(v.getContext(), "You are Click on" + myData.getName(), Toast.LENGTH_SHORT).show();
            }
        });

    }

    @Override
    public int getItemCount() {
        return mylist.length;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        public ImageView imageView;
        public TextView textView;
        public RelativeLayout relativeLayout;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            this.imageView = (ImageView) itemView.findViewById(R.id.imageview);
            this.textView = (TextView) itemView.findViewById(R.id.textview);
            this.relativeLayout = (RelativeLayout) itemView.findViewById(R.id.relativelayout);
        }
    }
}

Now display data in a single XML file. 

singledata.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="70sp"
    android:id="@+id/relativelayout"
    android:background="@drawable/border">
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageview"
        android:layout_marginLeft="10dp"
        android:layout_centerVertical="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        />
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/textview"
    android:gravity="center_vertical"
    android:layout_marginLeft="10dp"
    android:layout_toRightOf="@+id/imageview"
    android:layout_marginTop="15sp"
    android:text="@string/app_name"
    android:textSize="20dp"/>
</RelativeLayout>

Create Data class 

MyData.java

package com.pd.recyclerview;

public class MyData {

    String name;
    int images;
//create contractor

    public MyData(String name, int images) {
        this.name = name;
        this.images = images;
    }
    //getter and setter

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getImages() {
        return images;
    }

    public void setImages(int images) {
        this.images = images;
    }
}

Live Demo 

https://youtu.be/leq6dk6M8zI 

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