Xamarin.Android - Permission Request Sample

This sample demonstrates how to use the PermissionRequest API to securely provide access to restricted system features (such as a camera or microphone) from within a WebView. In this example, a dialog is created to allow users to explicitly approve or reject each request.


PermissionRequest can be used by setting up a custom WebChromeClient.


In you WebChromeClient implementation, you need to override OnPermissionRequest. This method is called when the web content is requesting permission to access some resources, providing an opportunity to approve or reject the request. In this implementation, we display a dialog to allow the user to approve or reject any request. In other applications, you may want to implement a whitelist of allowed APIs. Also, override OnPermissionRequestCanceled for handling cancellation of the PermissionRequest by the web content.

When the user confirms or denies the request, you can respond back to the web content by grant or deny respectively.


  • Tap on the "Start" button
  • Grant permission for android.webkit.resource.VIDEO_CAPTURE
  • Observe camera turn on
  • Tap on the "Stop" button
  • Tap on the "Start" button
  • Do not grant permission for android.webkit.resource.VIDEO_CAPTURE
  • Observe camera does not turn on

Build Requirements

Using this sample requires the Android SDK platform for Android 5.0 (API level 21).


Android permission request popup


Copyright (c) 2014 The Android Open Source Project, Inc.

Ported from Android PermissionRequest Sample