Android：WebView - 没有为会议启用摄像头和麦克风

Question

我们连接到https://meet.jit.si 进行视频会议。如果我们在 Android 设备上使用 chrome 浏览器（在 Android 7 和 10 上测试），我们可以在启用相机和麦克风的情况下加入。能够打开和关闭它们。但是，如果我们使用 webview 尝试相同的操作，我们甚至不会从网站收到允许访问的提示，并在尝试打开它们时收到“无法访问摄像头/麦克风”错误。

这是我们的代码。

清单

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

在加载时获得运行时权限

    String[] permissions =
            {Manifest.permission.READ_EXTERNAL_STORAGE,
             Manifest.permission.WRITE_EXTERNAL_STORAGE,
             Manifest.permission.INTERNET,
             Manifest.permission.RECORD_AUDIO,
             Manifest.permission.CAMERA};

    ActivityCompat.requestPermissions(
            this,
            permissions,
            1010);

将网页加载到 WebView 中

String url = "https://meet.jit.si/testingconf49854";
WebView webView = findViewById(R.id.webView);
WebSettings mWebSettings = webView.getSettings();
mWebSettings.setLoadsImagesAutomatically(true);
mWebSettings.setBlockNetworkLoads(false);
mWebSettings.setJavaScriptEnabled(true);
mWebSettings.setLoadWithOverviewMode(true);
mWebSettings.setUseWideViewPort(false);
mWebSettings.setTextZoom(70);
mWebSettings.setCacheMode( WebSettings.LOAD_NO_CACHE );
mWebSettings.setUserAgentString("Mozilla/5.0 (Linux; Android 5.1.1; Nexus 5 Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.65 Mobile Safari/537.36");
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(true);

Map<String, String> noCacheHeaders = new HashMap<String, String>(2);
noCacheHeaders.put("Pragma", "no-cache");
noCacheHeaders.put("Cache-Control", "no-cache");
webView.loadUrl(url, noCacheHeaders);

请让我们知道我们在这里缺少什么。感谢您的帮助。

Answer 1

获得这些权限后，您需要像这样覆盖WebChromeClient 中的onPermissionRequest：

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

Answer 2

你可以这样尝试，对我来说完美无缺。这是我的代码：

   @Override
           public void onPermissionRequest(PermissionRequest request){
                String[] resources = request.getResources();
                
                switch (resources[0]){
                    case PermissionRequest.RESOURCE_AUDIO_CAPTURE:
                        Toast.makeText(getBaseContext(), "Audio Permission", Toast.LENGTH_SHORT).show();
                        request.grant(new String[]{PermissionRequest.RESOURCE_AUDIO_CAPTURE});
                    break;
                    case PermissionRequest.RESOURCE_MIDI_SYSEX:
                        Toast.makeText(getBaseContext(), "MIDI Permission", Toast.LENGTH_SHORT).show();
                        request.grant(new String[]{PermissionRequest.RESOURCE_MIDI_SYSEX});
                    break;
                    case PermissionRequest.RESOURCE_PROTECTED_MEDIA_ID:
                        Toast.makeText(getBaseContext(), "Encrypted media permission", Toast.LENGTH_SHORT).show();
                        request.grant(new String[]{PermissionRequest.RESOURCE_PROTECTED_MEDIA_ID});
                    break;
                    case PermissionRequest.RESOURCE_VIDEO_CAPTURE:
                        Toast.makeText(getBaseContext(), "Video Permission", Toast.LENGTH_SHORT).show();
                        request.grant(new String[]{PermissionRequest.RESOURCE_VIDEO_CAPTURE});
                    break;
                }
           }