Notification API Type Errors

Error: `notificationManager.ContentType` type incompatibility

Error Message

Type 'notificationManager.ContentType' is not assignable to type 'notification.ContentType'

Cause

Type mismatch between notificationManager.ContentType and notification.ContentType. The notificationManager.ContentType enum has additional properties that are not present in notification.ContentType, causing type incompatibility.

Solution

Cast the ContentType value to number type to resolve the type incompatibility.

Key Points

Import from @kit.NotificationKit: import { notificationManager } from '@kit.NotificationKit'
Cast to number: as number when assigning to contentType
Use proper error handling with BusinessError
Use hilog for logging instead of console

Notification Request Structure

interface NotificationRequest {
  id: number;
  content: NotificationContent;
  notificationSlotType?: SlotType;
  isOngoing?: boolean;
  isUnremovable?: boolean;
  deliveryTime?: number;
  tapDismissed?: boolean;
  autoDeletedTime?: number;
  classification?: Classification;
  groupName?: string;
  slotType?: SlotType;
  ...
}

Content Types

notificationManager.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT
notificationManager.ContentType.NOTIFICATION_CONTENT_LONG_TEXT
notificationManager.ContentType.NOTIFICATION_CONTENT_PICTURE
notificationManager.ContentType.NOTIFICATION_CONTENT_CONVERSATION
notificationManager.ContentType.NOTIFICATION_CONTENT_MULTILINE
notificationManager.ContentType.NOTIFICATION_CONTENT_MEDIA
notificationManager.ContentType.NOTIFICATION_CONTENT_LOCAL_LIVE_VIEW
notificationManager.ContentType.NOTIFICATION_CONTENT_LIVE_VIEW

Basic Text Content

interface NotificationBasicContent {
  title: string;
  text: string;
  additionalText?: string;
  largeIcon?: string;
  briefText?: string;
  expandedTitle?: string;
}

Publishing Pattern

let notificationRequest: notificationManager.NotificationRequest = {
  id: 1,
  content: {
    contentType: notificationManager.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT as number,
    normal: {
      title: 'Test Notification',
      text: 'This is a test notification',
      additionalText: 'Additional text'
    }
  }
};

notificationManager.publish(notificationRequest)
  .then(() => {
    hilog.info(0x0000, 'testTag', 'Publish notification success');
  })
  .catch((err: BusinessError) => {
    hilog.error(0x0000, 'testTag', 'Publish notification failed: %{public}s', JSON.stringify(err));
  });

Error Handling

// Common error codes
if (err.code === 1600001) {
  // Notification not enabled
} else if (err.code === 1600002) {
  // Too many notifications
} else if (err.code === 1600003) {
  // Invalid notification
} else if (err.code === 1600004) {
  // Notification slot not found
}

Best Practices

Cast to number: Always cast ContentType to number to avoid type errors
Use hilog: Use hilog instead of console for better logging
Handle errors: Always catch and handle BusinessError
Use unique IDs: Ensure notification IDs are unique
Test permissions: Verify notification permissions are granted