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README.md

      1 
      2 Android PermissionRequest Sample
      3 ===================================
      4 
      5 This sample demonstrates how to use the PermissionRequest API to
      6 securely provide access to restricted system features (such as a
      7 camera or microphone) from within a WebView. In this example, a dialog
      8 is created to allow users to explicitly approve or reject each
      9 request.
     10 
     11 Introduction
     12 ------------
     13 
     14 PermissionRequest can be used by setting up a custom WebChromeClient.
     15 
     16 ```java
     17 mWebView.setWebChromeClient(mWebChromeClient);
     18 ```
     19 
     20 In you WebChromeClient implementation, you need to override
     21 [onPermissionRequest][1]. This method is called when the web content
     22 is requesting permission to access some resources, providing an
     23 opportunity to approve or reject the request. In this implementation,
     24 we display a dialog to allow the user to approve or reject any
     25 request. In other applications, you may want to implement a whitelist
     26 of allowed APIs.  Also, override [onPermissionRequestCanceled][2] for
     27 handling cancellation of the PermissionRequest by the web content.
     28 
     29 When the user confirms or denies the request, you can respond back to
     30 the web content by [grant][3] or [deny][4] respectively.
     31 
     32 ```java
     33 mPermissionRequest.grant(mPermissionRequest.getResources());
     34 ```
     35 
     36 This sample provides the web content from the assets folder in the
     37 app. Since WebView is not allowed to use getUserMedia from a "file://"
     38 URL, the app uses the SimpleWebServer class to provide the content via
     39 "http://localhost".
     40 
     41 [1]: http://developer.android.com/reference/android/webkit/WebChromeClient.html#onPermissionRequest(android.webkit.PermissionRequest)
     42 [2]: http://developer.android.com/reference/android/webkit/WebChromeClient.html#onPermissionRequestCanceled(android.webkit.PermissionRequest)
     43 [3]: http://developer.android.com/reference/android/webkit/PermissionRequest.html#grant(java.lang.String[])
     44 [4]: http://developer.android.com/reference/android/webkit/PermissionRequest.html#deny()
     45 
     46 Pre-requisites
     47 --------------
     48 
     49 - Android SDK 23
     50 - Android Build Tools v23.0.3
     51 - Android Support Repository
     52 
     53 Screenshots
     54 -------------
     55 
     56 <img src="screenshots/image1.png" height="400" alt="Screenshot"/> <img src="screenshots/image2.png" height="400" alt="Screenshot"/> 
     57 
     58 Getting Started
     59 ---------------
     60 
     61 This sample uses the Gradle build system. To build this project, use the
     62 "gradlew build" command or use "Import Project" in Android Studio.
     63 
     64 Support
     65 -------
     66 
     67 - Google+ Community: https://plus.google.com/communities/105153134372062985968
     68 - Stack Overflow: http://stackoverflow.com/questions/tagged/android
     69 
     70 If you've found an error in this sample, please file an issue:
     71 https://github.com/googlesamples/android-PermissionRequest
     72 
     73 Patches are encouraged, and may be submitted by forking this project and
     74 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
     75 
     76 License
     77 -------
     78 
     79 Copyright 2016 The Android Open Source Project, Inc.
     80 
     81 Licensed to the Apache Software Foundation (ASF) under one or more contributor
     82 license agreements.  See the NOTICE file distributed with this work for
     83 additional information regarding copyright ownership.  The ASF licenses this
     84 file to you under the Apache License, Version 2.0 (the "License"); you may not
     85 use this file except in compliance with the License.  You may obtain a copy of
     86 the License at
     87 
     88 http://www.apache.org/licenses/LICENSE-2.0
     89 
     90 Unless required by applicable law or agreed to in writing, software
     91 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     92 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
     93 License for the specific language governing permissions and limitations under
     94 the License.
     95