Setup

dependencies {
    implementation "androidx.browser:browser:1.4.0" // Use the latest version
}

// In your Activity or Fragment
import android.net.Uri
import androidx.browser.customtabs.CustomTabsIntent
import androidx.core.content.ContextCompat

// ... inside a method, e.g., onClick listener
fun openUrlInCustomTab(url: String) {
    val builder = CustomTabsIntent.Builder()

    // Optional: Customize the toolbar color
    builder.setToolbarColor(ContextCompat.getColor(this, R.color.colorPrimary))

    // Optional: Add a custom close button (e.g., from your drawables)
    // builder.setCloseButtonIcon(BitmapFactory.decodeResource(resources, R.drawable.ic_arrow_back))

    // Optional: Enable the share action button
    builder.setShowShareButton(true)

    // Build the CustomTabsIntent
    val customTabsIntent = builder.build()

    // Launch the URL
    customTabsIntent.launchUrl(this, Uri.parse(url))
}

// Example usage:
// openUrlInCustomTab("https://www.example.com")

<!-- activity_main.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

// MainActivity.kt
package com.example.mywebviewapp

import android.os.Bundle
import android.webkit.WebView
import android.webkit.WebViewClient
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

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

        val webView: WebView = findViewById(R.id.webView)

        // Configure WebView settings (optional but recommended)
        webView.settings.javaScriptEnabled = true // Enable JavaScript
        webView.settings.domStorageEnabled = true // Enable DOM storage

        // Set a WebViewClient to handle page navigation within the WebView itself
        webView.webViewClient = object : WebViewClient() {
            // This method is called when a new URL is about to be loaded in the WebView.
            // Returning true means the WebView will handle the URL, false means the system will.
            override fun shouldOverrideUrlLoading(view: WebView?, url: String?): Boolean {
                view?.loadUrl(url!!)
                return true
            }
        }

        // Load the specified URL
        val urlToLoad = "https://www.example.com" // Replace with your supplied URL
        webView.loadUrl(urlToLoad)
    }

    // Handle back button presses to navigate within the WebView history
    override fun onBackPressed() {
        val webView: WebView = findViewById(R.id.webView)
        if (webView.canGoBack()) {
            webView.goBack()
        } else {
            super.onBackPressed()
        }
    }
}

// ViewController.swift
import UIKit
import SafariServices

import UIKit
import SafariServices

class ViewController: UIViewController {
    func didTapButton() {
        guard let url = URL(string: "http://www.example.com") else {
            return
        }

        open(url: url)
    }

    private func open(url: URL) {
        let safariVC = SFSafariViewController(url: url)

        // Optional: Customize the tint color
        safariVC.preferredControlTintColor = .blue
        safariVC.preferredBarTintColor = .lightGray

        // Present the SFSafariViewController
        present(safariVC, animated: true, completion: nil)
    }
}