Android: Stably Ramp with using webkit WebViewWidget and using in-app webview tab activity for external links

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">

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/main_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

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

    </RelativeLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

activity_webview_tab.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/main_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

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

    </RelativeLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package stably.ramp.example

import android.content.Intent
import android.os.Build
import android.os.Bundle
import android.view.View
import android.webkit.WebResourceRequest
import android.webkit.WebSettings
import android.webkit.WebView
import androidx.appcompat.app.AppCompatActivity
import androidx.webkit.WebViewClientCompat
import androidx.webkit.WebSettingsCompat
import androidx.webkit.WebViewFeature

class MainActivity : AppCompatActivity() {

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

        // Get a reference to the WebView
        val webView: WebView = findViewById(R.id.web_view)

        // Configure the WebView settings
        val webSettings: WebSettings = webView.settings
        webSettings.javaScriptEnabled = true
        webSettings.domStorageEnabled = true
        webSettings.cacheMode = WebSettings.LOAD_CACHE_ELSE_NETWORK
        webView.setLayerType(View.LAYER_TYPE_HARDWARE, null)

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            val settings = webView.settings
            settings.mixedContentMode = WebSettings.MIXED_CONTENT_ALWAYS_ALLOW
        }

        // Enable support for the latest WebView APIs
        if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
            WebSettingsCompat.setForceDark(webView.settings, WebSettingsCompat.FORCE_DARK_ON)
        }

        // Set the WebView client
        webView.webViewClient = MyWebViewClient()

        // Load a website
        webView.loadUrl("https://ramp-beta.stably.io/?integrationId=younis_android_test")
    }

    private inner class MyWebViewClient : WebViewClientCompat() {

        override fun shouldOverrideUrlLoading(view: WebView, request: WebResourceRequest): Boolean {
            val url = request.url.toString()

            // Allow navigation to certain URLs
            if (url.contains("stably.io")) {
                return super.shouldOverrideUrlLoading(view, request)
            }

            // Disallow navigation to all other URLs
            // and open the URL in a WebView tab within the app
            val intent = Intent(this@MainActivity, WebviewTabActivity::class.java)
            intent.putExtra("url", url)
            startActivity(intent)

            // Return true to indicate we're handling the URL ourselves.
            return true
        }
    }
}

WebkitTabActivity.kt

package stably.ramp.example

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

class WebviewTabActivity : AppCompatActivity() {

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

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

        val extras = intent.extras
        if (extras != null) {
            val url = extras.getString("url")
            if (url != null) {
                webView.loadUrl(url)
            }
        }
    }
}