95 lines
3.6 KiB
Markdown
95 lines
3.6 KiB
Markdown
|
|
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.
|
|
|
|
Introduction
|
|
------------
|
|
|
|
PermissionRequest can be used by setting up a custom WebChromeClient.
|
|
|
|
```java
|
|
mWebView.setWebChromeClient(mWebChromeClient);
|
|
```
|
|
|
|
In you WebChromeClient implementation, you need to override
|
|
[onPermissionRequest][1]. 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][2] 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][3] or [deny][4] respectively.
|
|
|
|
```java
|
|
mPermissionRequest.grant(mPermissionRequest.getResources());
|
|
```
|
|
|
|
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".
|
|
|
|
[1]: http://developer.android.com/reference/android/webkit/WebChromeClient.html#onPermissionRequest(android.webkit.PermissionRequest)
|
|
[2]: http://developer.android.com/reference/android/webkit/WebChromeClient.html#onPermissionRequestCanceled(android.webkit.PermissionRequest)
|
|
[3]: http://developer.android.com/reference/android/webkit/PermissionRequest.html#grant(java.lang.String[])
|
|
[4]: http://developer.android.com/reference/android/webkit/PermissionRequest.html#deny()
|
|
|
|
Pre-requisites
|
|
--------------
|
|
|
|
- Android SDK 27
|
|
- Android Build Tools v27.0.2
|
|
- Android Support Repository
|
|
|
|
Screenshots
|
|
-------------
|
|
|
|
<img src="screenshots/image1.png" height="400" alt="Screenshot"/> <img src="screenshots/image2.png" height="400" alt="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.
|
|
|
|
Support
|
|
-------
|
|
|
|
- Google+ Community: https://plus.google.com/communities/105153134372062985968
|
|
- Stack Overflow: http://stackoverflow.com/questions/tagged/android
|
|
|
|
If you've found an error in this sample, please file an issue:
|
|
https://github.com/googlesamples/android-PermissionRequest
|
|
|
|
Patches are encouraged, and may be submitted by forking this project and
|
|
submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
|
|
|
|
License
|
|
-------
|
|
|
|
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
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
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.
|