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README.md

      1 Android PermissionRequest Sample
      2 ===================================
      3 
      4 This sample demonstrates how to use the PermissionRequest API to
      5 securely provide access to restricted system features (such as a
      6 camera or microphone) from within a WebView. In this example, a dialog
      7 is created to allow users to explicitly approve or reject each
      8 request.
      9 
     10 Introduction
     11 ------------
     12 
     13 PermissionRequest can be used by setting up a custom WebChromeClient.
     14 
     15 ```java
     16 mWebView.setWebChromeClient(mWebChromeClient);
     17 ```
     18 
     19 In you WebChromeClient implementation, you need to override
     20 [onPermissionRequest][1]. This method is called when the web content
     21 is requesting permission to access some resources, providing an
     22 opportunity to approve or reject the request. In this implementation,
     23 we display a dialog to allow the user to approve or reject any
     24 request. In other applications, you may want to implement a whitelist
     25 of allowed APIs.  Also, override [onPermissionRequestCanceled][2] for
     26 handling cancellation of the PermissionRequest by the web content.
     27 
     28 When the user confirms or denies the request, you can respond back to
     29 the web content by [grant][3] or [deny][4] respectively.
     30 
     31 ```java
     32 mPermissionRequest.grant(mPermissionRequest.getResources());
     33 ```
     34 
     35 This sample provides the web content from the assets folder in the
     36 app. Since WebView is not allowed to use getUserMedia from a "file://"
     37 URL, the app uses the SimpleWebServer class to provide the content via
     38 "http://localhost".
     39 
     40 [1]: http://developer.android.com/reference/android/webkit/WebChromeClient.html#onPermissionRequest(android.webkit.PermissionRequest)
     41 [2]: http://developer.android.com/reference/android/webkit/WebChromeClient.html#onPermissionRequestCanceled(android.webkit.PermissionRequest)
     42 [3]: http://developer.android.com/reference/android/webkit/PermissionRequest.html#grant(java.lang.String[])
     43 [4]: http://developer.android.com/reference/android/webkit/PermissionRequest.html#deny()
     44 
     45 Pre-requisites
     46 --------------
     47 
     48 - Android SDK v21
     49 - Android Build Tools v21.1.1
     50 - Android Support Repository
     51 
     52 Screenshots
     53 -------------
     54 
     55 <img src="screenshots/main.png" height="400" alt="Screenshot"/> 
     56 
     57 Getting Started
     58 ---------------
     59 
     60 This sample uses the Gradle build system. To build this project, use the
     61 "gradlew build" command or use "Import Project" in Android Studio.
     62 
     63 Support
     64 -------
     65 
     66 - Google+ Community: https://plus.google.com/communities/105153134372062985968
     67 - Stack Overflow: http://stackoverflow.com/questions/tagged/android
     68 
     69 If you've found an error in this sample, please file an issue:
     70 https://github.com/googlesamples/android-PermissionRequest
     71 
     72 Patches are encouraged, and may be submitted by forking this project and
     73 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
     74 
     75 License
     76 -------
     77 
     78 Copyright 2014 The Android Open Source Project, Inc.
     79 
     80 Licensed to the Apache Software Foundation (ASF) under one or more contributor
     81 license agreements.  See the NOTICE file distributed with this work for
     82 additional information regarding copyright ownership.  The ASF licenses this
     83 file to you under the Apache License, Version 2.0 (the "License"); you may not
     84 use this file except in compliance with the License.  You may obtain a copy of
     85 the License at
     86 
     87 http://www.apache.org/licenses/LICENSE-2.0
     88 
     89 Unless required by applicable law or agreed to in writing, software
     90 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     91 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
     92 License for the specific language governing permissions and limitations under
     93 the License.
     94