Build a WebView

class PortalWebViewActivity() : AppCompatActivity() {
  private lateinit var portal: Portal
  private lateinit var webView: PortalWebView


  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    setContentView(R.layout.activity_portal_webview)
    portal = (application as PortalApplication).getPortal()

    val url = "https://app.uniswap.org"

    webView = portal.createWebView(url) // This returns an instance of PortalWebView

    // Add the PortalWebView Fragment to the view
    val transaction = supportFragmentManager.beginTransaction()
    transaction.replace(R.id.webViewContainer, webView)
    transaction.commit()
  }

  fun goBack() {
    if (webView.canGoBack()) {
      webView.goBack() // Navigates the WebView to the previous page
    }
  }

  fun goForward() {
    if (webView.canGoForward()) {
      webView.goForward() // Navigates the WebView to the next page
    }
  }

  fun reload() {
    webView.reload()
  }
}