#鸿蒙通关秘籍#如何在鸿蒙系统中使用WebRTC进行视频会议?

HarmonyOS
5天前
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樱花语HTTP

在鸿蒙系统中使用WebRTC进行视频会议需要开启摄像头和麦克风权限。在应用代码中,通过调用navigator.mediaDevices.getUserMedia()接口,可以获取用户的摄像头和麦克风。以下是代码示例:

javascript // index.html <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> </head> <body> <video id="video" width="500px" height="500px" autoplay="autoplay"></video> <canvas id="canvas" width="500px" height="500px"></canvas> <br> <input type="button" title="HTML5摄像头" value="开启摄像头" onclick="getMedia()"/> <script> function getMedia() { let constraints = { video: {width: 500, height: 500}, audio: true }; let video = document.getElementById("video"); let promise = navigator.mediaDevices.getUserMedia(constraints); promise.then(function (MediaStream) { video.srcObject = MediaStream; video.play(); }); } </script> </body> </html>

在应用侧,需要请求相应权限:

typescript // xxx.ets import { webview } from '@kit.ArkWeb'; import { abilityAccessCtrl } from '@kit.AbilityKit';

@Entry @Component struct WebComponent { controller: webview.WebviewController = new webview.WebviewController()

aboutToAppear() { webview.WebviewController.setWebDebuggingAccess(true); let atManager = abilityAccessCtrl.createAtManager(); atManager.requestPermissionsFromUser(getContext(this), ['ohos.permission.CAMERA', 'ohos.permission.MICROPHONE']) .then(data => { let result: Array<number> = data.authResults; let hasPermissions1 = true; result.forEach(item => { if (item === -1) { hasPermissions1 = false; } }); if (hasPermissions1) { console.info("hasPermissions1"); } else { console.info(" not hasPermissions1"); } }).catch(() => { return; }); }

build() { Column() { Web({ src: $rawfile('index.html'), controller: this.controller }) .onPermissionRequest((event) => { if (event) { AlertDialog.show({ title: 'title', message: 'text', primaryButton: { value: 'deny', action: () => { event.request.deny(); } }, secondaryButton: { value: 'onConfirm', action: () => { event.request.grant(event.request.getAccessibleResource()); } }, cancel: () => { event.request.deny(); } }) } }) } } }

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