Build a WebView

Once you have a Portal instance and you have generated a wallet, you can now create a WebView to interact with dApps using the Portal wallet.

In the example below, we have an Activity that creates an instance of the PortalWebView Fragment and adds it to the view.

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()
  }
}

And thats it! Remember that you will need a portal instance to start the web view and you will also need to initialize Portal with autoApprove: true if you want the web view to auto-approve transactions.

Optional Parameters

Following are the optional parameters that you can pass to customize the injected provider in the WebView further

• chainId: Chain id you want to run the dapp on, by default it is eip155:11155111

• eip6963Icon: A string representing the Base64-encoded icon for EIP-6963 compliance

• eip6963Name: A string representing the name for EIP-6963 compliance.

• eip6963Rdns: A reverse DNS string for identifying the application in EIP-6963-compliant contexts.

• eip6963Uuid: A unique identifier string for EIP-6963 compliance.

Next, let's explore how to use Portal's Swaps integration to perform swaps directly within your Android app.