[Android] webview permission camera + file picker

CustomWebView.txt

class MoonPayPaymentWebView : AppCompatActivity() {

companion object {
        const val PERMISSION_REQUEST_CODE = 1000
        const val REQUEST_SELECT_FILE = 1001
        private const val FILECHOOSER_RESULTCODE = 1002

        private var mUploadMessage: ValueCallback<Uri?>? = null
        var uploadMessage: ValueCallback<Array<Uri>>? = null
}

private fun displayWebView(payload: String) {

  webView.settings.apply {
            loadWithOverviewMode = true
            useWideViewPort = true
            javaScriptEnabled = true
            allowFileAccess = true
            allowFileAccessFromFileURLs = true
            allowUniversalAccessFromFileURLs = true
            allowContentAccess = true
            javaScriptCanOpenWindowsAutomatically = true
            mediaPlaybackRequiresUserGesture = false
            domStorageEnabled = true // Set because [WEBSITE] team say to use it.
        }

//        webView.webChromeClient = webViewManager.getWebChromeClient()

        webView.webChromeClient = object : WebChromeClient() {
            override fun onConsoleMessage(consoleMessage: ConsoleMessage?): Boolean {
                Log.d("---", "consoleMessage ${consoleMessage?.message()}")
                return super.onConsoleMessage(consoleMessage)
            }

            override fun onPermissionRequestCanceled(request: PermissionRequest?) {
                Log.d("---", "onPermissionRequestCanceled")
                super.onPermissionRequestCanceled(request)
            }

            override fun onShowFileChooser(
                webView: WebView?,
                filePathCallback: ValueCallback<Array<Uri>>?,
                fileChooserParams: FileChooserParams?
            ): Boolean {
                Log.d("---", "onshowfilechooser")
                if (uploadMessage != null) {
                    Log.d("---", "uploadMsg null")
                    uploadMessage!!.onReceiveValue(null)
                    uploadMessage = null
                }

                try {
                    uploadMessage = filePathCallback

                    val intent = fileChooserParams?.createIntent()
                    intent?.type = "image/*"

                    try {
                        startActivityForResult(intent, REQUEST_SELECT_FILE)
                    } catch (e: ActivityNotFoundException) {
                        Log.d("---", "exception startactivitynotfound")
                        uploadMessage = null
                        this@CustomWebView.showLongToast("Cannot Open File Chooser")
                        return false
                    }
                } catch (e: ActivityNotFoundException) {
                    Log.d("---", "activitynotfound exception")
                    uploadMessage = null
                    this@CustomWebView.showLongToast("Cannot Open File Chooser")
                    return false
                }

                return true
            }

            // Grant permissions for cam
            @TargetApi(Build.VERSION_CODES.M)
            override fun onPermissionRequest(request: PermissionRequest) {
                Log.d("---", "onpermission request")
                onUi {
                    if ("android.webkit.resource.VIDEO_CAPTURE" == request.resources[0]) {
                        if (ContextCompat.checkSelfPermission(
                                applicationContext,
                                android.Manifest.permission.CAMERA
                            ) == PackageManager.PERMISSION_GRANTED
                        ) {
                            Log.d("---", String.format("PERMISSION REQUEST %s GRANTED", request.origin.toString()))
                            request.grant(request.resources)
                        } else {
                            Log.d("---", "ELSE")
                            ActivityCompat.requestPermissions(
                                this@MoonPayPaymentWebView,
                                arrayOf(
                                    android.Manifest.permission.CAMERA,
                                    android.Manifest.permission.READ_EXTERNAL_STORAGE
                                ),
                                REQUEST_CODE
                            )
                        }
                    } else {
                        Log.d("---", "${request.resources}")
                    }
                }
            }
        }

        webView.webViewClient = object : WebViewClient() {
            override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
                checkAndHandleIfUrlIsRedirect(url)
            }

            override fun onPageFinished(view: WebView?, url: String?) {
                onPageLoaded()
            }

            override fun onReceivedError(view: WebView?,errorCode: Int,description: String?,failingUrl: String?) {
                Log.d("---", "$errorCode $description $failingUrl")
            }
        }

        webView.loadUrl("$Url?$payload")
  }

  private fun checkAndHandleIfUrlIsRedirect(url: String?) {
        // We check with `startWitch` because [WEBSITE] appended Query parameter to the url.
        if (url?.startsWith(WebViewManager.BUY_WEB_VIEW_REDIRECTION) == true) {
        
            // launch final activity
        }
    }

 public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        Log.d("---", "onActivity result $requestCode $resultCode $data")

//        if (requestCode == REQUEST_SELECT_FILE) {
//            Log.d("---", "uploadMessage = $uploadMessage")
//            uploadMessage?.let {
//                it.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, intent))
//                uploadMessage = null
//                webViewManager.onActivityResult(requestCode, resultCode, data)
//            } ?: return
//        }
//
//        if (requestCode == FILECHOOSER_RESULTCODE) {
//
//            mUploadMessage?.let {
//                val result =
//                    if (intent == null || resultCode != Activity.RESULT_OK) {
//                        null
//                    } else intent.data
//
//                it.onReceiveValue(result)
//                mUploadMessage = null
//            } ?: return
//        }

        if (requestCode == REQUEST_SELECT_FILE) {
            if (null == uploadMessage) {
                return
            }
            uploadMessage?.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data))
            uploadMessage = null
        }

        if (requestCode == SuccessActivity.REQUEST_CODE) {
            ReferralEmptyStateActivity.startActivity(this)
            setResult(Activity.RESULT_OK)
            finish()
        }

        return super.onActivityResult(requestCode, resultCode, data)
    }