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Android PermissionRequest 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.


This sample provides the web content from the assets folder in the app. Since WebView is not allowed to use getUserMedia from a "file://" URL, the app uses the SimpleWebServer class to provide the content via "http://localhost".


  • Android SDK 27
  • Android Build Tools v27.0.2
  • Android Support Repository


Screenshot Screenshot

Getting Started

This sample uses the Gradle build system. To build this project, use the "gradlew build" command or use "Import Project" in Android Studio.


If you've found an error in this sample, please file an issue:

Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see for more details.


Copyright 2017 The Android Open Source Project, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


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