获取DeviceToken的方法

import { hilog } from '@kit.PerformanceAnalysisKit';
import { deviceCertificate } from '@kit.DeviceSecurityKit';
import { BusinessError} from '@kit.BasicServicesKit';

const TAG: string = '[DevCertManagerModel]';

// 请求deviceToken，并处理结果
try {
  deviceCertificate.getDeviceToken().then((token) => {
      hilog.debug(0x0000, TAG, 'Succeeded in executing getDeviceToken');
      this.dispalyText = token;
  }).catch((err: BusinessError) => {
	hilog.error(0x0000, TAG, 'getDeviceToken failed!  %{public}d %{public}s', err.code, err.message);
  });
} catch(err) {
  let error: BusinessError = err as BusinessError;
  hilog.error(0x0000, TAG, 'getDeviceToken failed!  %{public}d %{public}s', err.code, err.message);
}