WebRTC error inside Chromium WebView: "CheckMediaAccessPermission: Not supported"

Question

I'm trying to show WebRTC chat in WebView. According to this documentation, WebView v36 supports WebRTC. For my test I'm using a device with Chrome/39.0.0.0 and I have added permissions to the AndroidManifest.xml file:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<user-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

but when I enter into the chat, I see a Chromium error log (device doesn't show \ translate anything, only 'loading' progress bar):

W/AudioManagerAndroid: Requires MODIFY_AUDIO_SETTINGS and RECORD_AUDIO
W/AudioManagerAndroid: No audio device will be available for recording
E/chromium: [ERROR:web_contents_delegate.cc(178)] WebContentsDelegate::CheckMediaAccessPermission: Not supported.
E/chromium: [ERROR:web_contents_delegate.cc(178)] WebContentsDelegate::CheckMediaAccessPermission: Not supported.
W/AudioManagerAndroid: Requires MODIFY_AUDIO_SETTINGS and RECORD_AUDIO
W/AudioManagerAndroid: No audio device will be available for recording
D/ChromiumCameraInfo: Camera enumerated: front

Tested on a real device, Android 5.1.1.

What is your target sdk version? If you set 23 or above, you must request these as runtime permissions. — Simon Marquis, Aug 12 '16 at 12:44
hm, added `request.grant(request.getResources());` - video is ok - audio issue still remains `WebContentsDelegate::CheckMediaAccessPermission: Not supported.` — Siarhei, Aug 12 '16 at 13:23
Your error is in the permissions declaration in the Manifest. It should be "uses-permission" instead of "user-permission" for MODIFY_AUDIO_SETTINGS. Good look! — pablopatarca, Dec 04 '17 at 23:24

Siarhei · Accepted Answer · 2016-08-15T22:21:11.207

46

additional request for permissions is needed

webView.setWebChromeClient(new WebChromeClient(){
        @TargetApi(Build.VERSION_CODES.LOLLIPOP)
        @Override
        public void onPermissionRequest(final PermissionRequest request) {
                request.grant(request.getResources());
        }
    });

update but it not working for audio capture

UPDATE found working google-sample code here

edited Aug 15 '16 at 22:21

answered Aug 12 '16 at 13:06

Siarhei

2,358
3
27
63

Any suggestion for me : https://stackoverflow.com/questions/44180093/cant-access-camera-from-android-webview-chrome-frame-in-context-of-webrtc – Nikola Lukic May 29 '17 at 11:45
@NikolaLukic hi, have you tried https://github.com/GoogleChrome/chromium-webview-samples/blob/master/webrtc-example/app/src/main/java/com/google/chrome/android/webrtcsample/MainActivity.java this sample? – Siarhei May 29 '17 at 14:59
Yes this project works but i still wanna know what is the problem with my project . Diff is only that i not use drawer layout and fragment layout ?!? thanks – Nikola Lukic May 30 '17 at 08:42
Hello @JonathanDunlap audio capture works in google-sample that i've shared in the answer – Siarhei Jul 25 '18 at 08:28
So where exactly do you add that code above, as in what file? – Johnny Gasyna Aug 01 '19 at 04:55
Hello @JohnnyGasyna, as i remember i've just replace my code with provided in sample. I'm not working on this project now and not able to check :( – Siarhei Aug 01 '19 at 13:29
3

@NikolaLukic: can you please tell me how did you solve ? I tried same in my project, but it's not working. – Sagar Panwala Apr 05 '20 at 08:24
I have these permissions, but still getting error ```WebContentsDelegate::CheckMediaAccessPermission: Not supported.``` – Sujith S Manjavana Jul 02 '22 at 16:57

score 8 · Answer 2 · answered Jun 17 '21 at 17:29

8

You need these permissions to access Camera and Microphone

<uses-permission android:name="android.permission.CAMERA"/>
<uses-feature android:name="android.hardware.camera" android:required="true"/>
<uses-feature android:name="android.hardware.camera.autofocus"/>
<uses-permission android:name="android.permission.RECORD_AUDIO" />

// don't miss this one
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

Next you need to grant permissions to your webview, check this link for more details:

webView.setWebChromeClient(new WebChromeClient(){
        @Override
        public void onPermissionRequest(PermissionRequest request) {
            runOnUiThread(() -> {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                    String[] PERMISSIONS = {
                            PermissionRequest.RESOURCE_AUDIO_CAPTURE,
                            PermissionRequest.RESOURCE_VIDEO_CAPTURE
                    };
                    request.grant(PERMISSIONS);
                }
            });
        }
    });

If audio playback is not working, use this:

webView.getSettings().setMediaPlaybackRequiresUserGesture(false);

answered Jun 17 '21 at 17:29

Muhammad Shuja

642
5
18

please share the issue you are having – Muhammad Shuja Jun 25 '21 at 02:17
If the app has the permissions, the webview won't ask any other permissions? – c-an Jun 25 '21 at 03:31
app permissions are not going to be enough, you need to grant permissions for webview as well, check the code above where webchromeclient is granted permissions `webview.setWebChromeClient(..){onPermissionRequest()}` – Muhammad Shuja Jun 25 '21 at 04:57
Yes, So, if you implement that part, it passes app's permissions to the webview. And the user doesn't need to be asked twice about the same permissions. Am I right? – c-an Jun 25 '21 at 07:04
1

yes user should not be asked again if app permissions are granted already – Muhammad Shuja Jun 25 '21 at 14:25
I have these permissions, but still getting error ```WebContentsDelegate::CheckMediaAccessPermission: Not supported.``` – Sujith S Manjavana Jul 02 '22 at 16:56
@Muhammad Shuja you are the men!! Thanks for the help! – Sahelanthropus Oct 25 '22 at 10:36
Where exactly should I add the Java code? – Vaibhav Rathore Mar 27 '23 at 19:02

score 2 · Answer 3 · answered Jun 23 '22 at 22:40

My experience with this in 2022:

CAMERA and RECORD_AUDIO permissions need to be declared in Manifest
setWebChromeClient.onPermissionRequest should check if those permissions have already been granted. If not, use registerForActivityResult(new RequestMultiplePermissions()) to ask the user to grant them.

score 1 · Answer 4 · answered Mar 18 '22 at 14:22

its mostly error in webview reload becuase when we will request for audio , camera permission on webview , after accept permission , we need to refresh the webpage.

   if (permission.equals("android.webkit.resource.AUDIO_CAPTURE")) {
                        demandForPermission(request.getOrigin().toString(), Manifest.permission.RECORD_AUDIO, MY_PERMISSIONS_REQUEST_RECORD_AUDIO);
                    } else {
                        myRequest.grant(request.getResources());
                    }

I also stuck this problem for many days but after in below link code , 100% working code Android Webview

Can you update the link? Page not found. – Krahmal Apr 26 '22 at 03:10 — Krahmal, Apr 26 '22 at 03:10

WebRTC error inside Chromium WebView: "CheckMediaAccessPermission: Not supported"

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