MainActivity.kt:
import android.content.Intent
import android.net.Uri
import android.os.Bundle
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.floatingactionbutton.FloatingActionButton

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_main)

        //implicit
        val url = "https://www.google.com"
        val implicitButton : FloatingActionButton = findViewById(R.id.floatingActionButton)
        implicitButton.setOnClickListener{
            val implicitIntent =Intent(Intent.ACTION_VIEW, Uri.parse(url))
            startActivity(implicitIntent)
        }
    }
}
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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Welcome to MAD Lab"
        android:textSize="24sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.5"
        tools:ignore="HardcodedText" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/floatingActionButton"
        android:layout_width="56dp"
        android:layout_height="76dp"
        android:clickable="true"
        app:fabSize="auto"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        app:layout_constraintVertical_bias="0.5"
        app:maxImageSize="30dp"
        app:srcCompat="@drawable/baseline_add_24"
        tools:ignore="ContentDescription,KeyboardInaccessibleWidget,SpeakableTextPresentCheck,SpeakableTextPresentCheck"/>

</androidx.constraintlayout.widget.ConstraintLayout>