RecyclerView_Impl_with_GUI

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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">


    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#ffff"
        android:id="@+id/recyclerview"
        >

    </androidx.recyclerview.widget.RecyclerView>

</androidx.constraintlayout.widget.ConstraintLayout>

Adapter.java

package com.example.recyclerview3;

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

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

import java.util.List;

//1- extends RecyclerView.Adapter<Adapter.ViewHolder>

public class Adapter  extends RecyclerView.Adapter<Adapter.ViewHolder> {


    private List<ModelClass> userList;

//4 - Make Constructor

    public Adapter (List<ModelClass>userList){this.userList = userList; }
//2 - implements methods OnCreateViewHolder , OnBindViewHolder ,
    @NonNull
    @Override
    public Adapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
      View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_design,parent, false);
      return new ViewHolder(view);
    }

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

//5- declare variable  and get the values.

//i take i image view1 and 1 textview 1 so i declare it one one time. It may many which your takes
//in your xml file (i,e - item.design)

        int resource = userList.get(position).getImageview1();
        String name = userList.get(position).getTextview1();

//6 - Now sending our data to our Holder
//Note we pass only resource, name because we take 2 data in item_design.xml.It may many which you
//take in item_design.xml

        holder.setData(resource,name);  //12- shift+enter click on setData and create method automatically.

    }

    @Override
    public int getItemCount() {

 //7 - Return userList size
        return userList.size();
    }
//3 - Create class of extended ViewHolder i.e ( public class Adapter  extends RecyclerView.Adapter<Adapter.ViewHolder>
    public class ViewHolder extends RecyclerView.ViewHolder{     //8- extends RecyclerView.ViewHolder

 //10- Simply declare an variable for our 1st imageview
 //i declare 2 items because i implements 2 items in item_design.xml

    private ImageView imageView;
    private TextView textView;


 //9- Create Constructor matching super (hold cursor on red line)

     public ViewHolder(@NonNull View itemView) {
        super(itemView);

//11- Here we assign our xml id into java ids.
//i assign 2 data , because i use 2 items in item_design.xml

        imageView=itemView.findViewById(R.id.imageview1);
        textView=itemView.findViewById(R.id.textview1);

    }

//12- a - created through setData (shift+enter)

    public void setData(int resource, String name) {

///12- b - set data into these variables
// i set 2 data only bcz i use only 2 data in item_design.xml

    imageView.setImageResource(resource);
    textView.setText(name);
    }
}
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.recyclerview3">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.RecyclerView3"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

build.gradle

plugins {
    id 'com.android.application'
}

android {
    compileSdk 32

    defaultConfig {
        applicationId "com.example.recyclerview3"
        minSdk 21
        targetSdk 32
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.4.1'
    implementation 'com.google.android.material:material:1.6.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation 'androidx.recyclerview:recyclerview:1.3.0-alpha02'
    implementation 'androidx.cardview:cardview:1.0.0'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}

item_design.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="wrap_content"
    xmlns:app="http://schemas.android.com/apk/res-auto">


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="95dp"
        android:background="#ffffff">


        ///for insert images we use CardView

        <androidx.cardview.widget.CardView
            android:id="@+id/imageview"
            android:layout_width="60dp"
            android:layout_height="60dp"
            app:cardCornerRadius = "60dp"
            android:layout_marginTop="20dp"
            android:layout_marginLeft="20dp">

            <ImageView
                android:id="@+id/imageview1"
                android:layout_width="60dp"
                android:layout_height="60dp"
                android:scaleType="centerCrop"
                android:src="@drawable/img1"/>




            ></androidx.cardview.widget.CardView>


        <TextView
            android:id="@+id/textview1"
            android:layout_width="120dp"
            android:layout_height="30dp"
            android:layout_marginLeft="20dp"
            android:layout_marginTop="20dp"
            android:layout_toRightOf="@+id/imageview"
            android:text="Aradhana"
            android:textColor="#000"
            android:textSize="20sp" />





    </RelativeLayout>

</RelativeLayout>

MainActivity.java

package com.example.recyclerview3;

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

import android.os.Bundle;

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

public class MainActivity extends AppCompatActivity {

//1- we have to declare some variables

    RecyclerView recyclerView;

//2- declare variable for Linear Layout

    LinearLayoutManager layoutManager;
    List<ModelClass>userList;
    Adapter adapter;

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

//3- set our data RecyclerView for this we have to create function.
        initData();          //5- Create method from it.
        initRecyclerView(); //4- Create method from it.


    }
//5 - a- method
    private void initData() {

//5 - b-
    userList = new ArrayList<>();
//5- c- give parameter for display in our project, ( data you use in item_design data , like image1, Text ).

    userList.add(new ModelClass(R.drawable.img1,"Aradhana"));
        userList.add(new ModelClass(R.drawable.img2,"Aradhana"));
        userList.add(new ModelClass(R.drawable.img3,"Aradhana"));
        userList.add(new ModelClass(R.drawable.img4,"Aastha"));
        userList.add(new ModelClass(R.drawable.img5,"Mine"));
        userList.add(new ModelClass(R.drawable.img6,"Ankita and Aastha"));
        userList.add(new ModelClass(R.drawable.img7,"Nikki"));
        userList.add(new ModelClass(R.drawable.img8,"Gang"));
        userList.add(new ModelClass(R.drawable.img9,"Squad"));

    }

    //4 - a - method
    private void initRecyclerView() {

//4 - b-
    recyclerView=findViewById(R.id.recyclerview);
    layoutManager= new LinearLayoutManager(this);
    layoutManager.setOrientation(RecyclerView.VERTICAL);
    recyclerView.setLayoutManager(layoutManager);
    adapter=new Adapter(userList);
    recyclerView.setAdapter(adapter);
    adapter.notifyDataSetChanged();

    }
}

ModelClass.java

package com.example.recyclerview3;

public class ModelClass {

//1- declare that items use in xml


    private int imageview1;
    private String textview1;


//3-Constructor

    public ModelClass(int imageview1, String textview1) {
        this.imageview1 = imageview1;
        this.textview1 = textview1;
    }

//2-getter and setter
    public int getImageview1() {
        return imageview1;
    }

    public void setImageview1(int imageview1) {
        this.imageview1 = imageview1;
    }

    public String getTextview1() {
        return textview1;
    }

    public void setTextview1(String textview1) {
        this.textview1 = textview1;
    }
}