<?xml version="1.0" encoding="UTF-8"?>
<!--
 Copyright 2014 The Android Open Source Project

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
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 See the License for the specific language governing permissions and
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<sample>
    <name>PermissionRequest</name>
    <group>Content</group>
    <package>com.example.android.permissionrequest</package>

    <minSdk>21</minSdk>

    <strings>
        <intro>
            <![CDATA[
            This sample shows how to handle PermissionRequest coming from web apps inside of a
            WebView.
            ]]>
        </intro>
    </strings>

    <template src="base"/>
    <template src="FragmentView"/>
    <common src="logger"/>
    <common src="activities"/>

    <metadata>
        <status>PUBLISHED</status>
        <categories>Content</categories>
        <technologies>Android</technologies>
        <languages>Java</languages>
        <solutions>Mobile</solutions>
        <level>INTERMEDIATE</level>
        <icon>screenshots/icon_web.png</icon>
        <screenshots>
            <img>screenshots/main.png</img>
        </screenshots>
        <api_refs>
            <android>android.webkit.PermissionRequest</android>
            <android>android.webkit.WebView</android>
            <android>android.webkit.WebChromeClient</android>
        </api_refs>

        <description>
<![CDATA[
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.
]]>
        </description>

        <intro>
<![CDATA[
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()
]]>
        </intro>
    </metadata>

</sample>