INTENTS

E:\android\MyApplication\app\build.gradle.kts

    buildTypes {

    dataBinding{
        enable=true
        //enabled=true old version of android sdk Do it
    }

}

E:\android\MyApplication\app\src\main\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">

    <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.MyApplication">
        <activity
            android:name=".Activity_third"
            android:exported="false" />
        <activity
            android:name=".Activity_second"
            android:exported="false" />
        <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>

E:\android\MyApplication\app\src\main\java\com\example\myapplication\MainActivity.kt

<?xml version="1.0" encoding="utf-8"?>
<layout>
<LinearLayout 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"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="We are in First Page"
        />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/name"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/mobile"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Move to Second"
        android:id="@+id/bt1"
        />
</LinearLayout>
</layout>

E:\android\MyApplication\app\src\main\java\com\example\myapplication\MainActivity.kt

package com.example.myapplication

import android.annotation.SuppressLint
import android.content.Intent
import android.os.Bundle
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.databinding.DataBindingUtil
import com.example.myapplication.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {
    var binding: ActivityMainBinding?=null

    @SuppressLint("WrongConstant")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Enable edge-to-edge content
        enableEdgeToEdge()
        binding= DataBindingUtil.setContentView(this,R.layout.activity_main)

        binding?.bt1?.setOnClickListener{
            var intent= Intent(this@MainActivity,Activity_second::class.java)
            // intent.putExtra("key","values")
            intent.putExtra("name",binding?.name?.text.toString())
            intent.putExtra("mobile",binding?.mobile?.text.toString())
            startActivity(intent)
        }

    }
}

E:\android\MyApplication\app\src\main\res\layout\activity_second.xml

<?xml version="1.0" encoding="utf-8"?>
<layout>
    <LinearLayout 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"
        tools:context=".Second">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="We are in Second Page" />

        <Button
            android:id="@+id/bt2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Move to Third" />
    </LinearLayout>

</layout>

E:\android\MyApplication\app\src\main\java\com\example\myapplication\Activity_second.kt

package com.example.myapplication

import android.content.Intent
import android.os.Bundle
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import androidx.databinding.DataBindingUtil
import com.example.myapplication.databinding.ActivitySecondBinding

class Activity_second : AppCompatActivity() {
    var binding: ActivitySecondBinding? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_second)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_second)
        var dataintent = intent
        var s1 = dataintent.getStringExtra("name")
        var s2 = dataintent.getStringExtra("mobile")
        Toast.makeText(this, "" + s1 + s2, Toast.LENGTH_LONG).show()
        binding?.bt2?.setOnClickListener {
            var intent = Intent(this, Activity_third::class.java)
            intent.putExtra("data", s1 + s2)
            startActivity(intent)
            // finish()
        }


    }
}

E:\android\MyApplication\app\src\main\res\layout\activity_third.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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Activity_third">

</androidx.constraintlayout.widget.ConstraintLayout>

E:\android\MyApplication\app\src\main\java\com\example\myapplication\Activity_third.kt

package com.example.myapplication

import android.content.Intent
import android.os.Bundle
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat

class Activity_third : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_third)
//        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
//            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
//            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
//            insets
//        }
        var dataintent=intent
        var s1=dataintent.getStringExtra("data")
        Toast.makeText(this,""+s1, Toast.LENGTH_LONG).show()

    }

    override fun onBackPressed() {
        super.onBackPressed()
        var intent= Intent(this,MainActivity::class.java)
        startActivity(intent)
        finish() // Optionally finish this activity to remove it from the back stack
    }

}

Output