设备管理

import { DeviceKind, DeviceInfo } from 'srtc';

const cams: DeviceInfo[] = await meeting.getDevices(DeviceKind.videoInput);
const mics: DeviceInfo[] = await meeting.getDevices(DeviceKind.audioInput);
const all: DeviceInfo[] = await meeting.getDevices();

// 读缓存，不触发系统查询
const cached: DeviceInfo[] = meeting.cachedDevices(DeviceKind.videoInput);

meeting.switchCamera();                       // 前后置切换
meeting.switchCameraDevice(deviceId);         // 切到指定设备

const delegate: SMeetingDelegate = {
  onDeviceAdd: (m, device: DeviceInfo) => {
    this.devices = m.cachedDevices();          // 建新数组赋值
    if (device.kind === DeviceKind.audioInput) {
      toast(`已接入 ${device.name}`);
    }
  },
  onDeviceRemove: (m, device: DeviceInfo) => {
    this.devices = m.cachedDevices();
  }
};

aboutToAppear(): void {
  this.meeting.delegates.add(delegate);
  this.meeting.startDeviceMonitoring();
}

aboutToDisappear(): void {
  this.meeting.stopDeviceMonitoring();
  this.meeting.delegates.remove(delegate);
}

@State cams: DeviceInfo[] = [];
@State currentCamId: string = '';

async loadDevices(): Promise<void> {
  this.cams = await this.meeting.getDevices(DeviceKind.videoInput);
}

build() {
  Column() {
    ForEach(this.cams, (d: DeviceInfo) => {
      Row() {
        Text(d.name)
        if (d.isDefault) {
          Text('（默认）').fontSize(12)
        }
      }
      .onClick(() => {
        this.meeting.switchCameraDevice(d.deviceId);
        this.currentCamId = d.deviceId;
      })
    }, (d: DeviceInfo) => d.deviceId)
  }
}

cameras: 2   后置 device/0（默认）、前置 device/1
mics:    1   Microphone (2)（默认）
speakers: 2

import { abilityAccessCtrl, common, Permissions } from '@kit.AbilityKit';

const perms: Permissions[] = [
  'ohos.permission.CAMERA',
  'ohos.permission.MICROPHONE'
];
await abilityAccessCtrl.createAtManager()
  .requestPermissionsFromUser(getContext(this) as common.UIAbilityContext, perms);