鸿蒙应用服务开发【自定义通知角标】

爱桥代码的程序媛2024-08-07 9:23

自定义通知角标

介绍

本示例主要展示了设定应用的桌面图标角标的功能，使用@ohos.notificationManager接口，进行桌面角标的设置，通知的发送，获取等。

效果预览

使用说明

  1. 在主界面，可以看到当前应用的所有消息通知；
  2. 点击右下角Tab页签进入通知发送页面，点击对应的通知即可发送相应类型的通知，点击几次发送几条；
  3. 点击左下角Tab页签进入消息列表，可以查看刚才发送的消息，消息右边会显示消息数量，点击相应的消息可进行消息读取，取消相应通知；
  4. 下拉通知栏，可以看到角标数量，对应消息数量。

具体实现

  • 允许发送通知，发送通知的功能接口封装在NotificationUtil，源码参考：[NotificationUtil.ets]

    /*

    • Copyright (c) 2023 Huawei Device Co., Ltd.
    • Licensed under the Apache License, Version 2.0 (the "License");
    • you may not use this file except in compliance with the License.
    • You may obtain a copy of the License at
    • http://www.apache.org/licenses/LICENSE-2.0
    • Unless required by applicable law or agreed to in writing, software
    • distributed under the License is distributed on an "AS IS" BASIS,
    • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    • See the License for the specific language governing permissions and
    • limitations under the License.
      */

    import { notificationManager } from '@kit.NotificationKit';
    import { logger } from '../util/Logger';
    import { notificationManagement } from '../notification/NotificationManagementUtil';
    import { BusinessError } from '@kit.BasicServicesKit';

    const TAG: string = 'NotificationUtilModel';

    class NotificationUtil {
    /**
    * enable notification
    */
    private id: number = 0

    async enableNotification() {
  try {
    notificationManager.requestEnableNotification(AppStorage.get('context'), (err: BusinessError): void => {
      if (err) {
        logger.error(TAG, `requestEnableNotification failed, code is ${err.code}, message is ${err.message}`);
      } else {
        logger.info(TAG, 'requestEnableNotification success');
      }
    });
    logger.info(TAG, `enableNotification success`);
  } catch (err) {
    logger.info(TAG, `enableNotification err ${JSON.stringify(err)}`);
  }
}

/**
 *
 * @param notificationRequest
 * @param id, Support specifying notification id when publishing notifications
 */
async publishNotification(notificationRequest: notificationManager.NotificationRequest, group?: string) {
  notificationRequest.id = this.id;
  this.id++;
  if (group) {
    notificationRequest.groupName = group;
  }

  try {
    await notificationManager.publish(notificationRequest);
    logger.info(TAG, `publish notification success`);
    // 通知管理器添加新通知
    await notificationManagement.addNotification(notificationRequest);
  } catch (err) {
    if (err) {
      logger.info(TAG, `publishNotification err ${JSON.stringify(err)}`);
    }
  }
}

/**
 * cancel notification by id
 */
async cancelNotificationById(id: number) {
  try {
    await notificationManager.cancel(id);
    logger.info(TAG, `cancel success`);
  } catch (err) {
    if (err) {
      logger.info(TAG, `cancel err ${JSON.stringify(err)}`);
    }
  }
}

/**
 * cancel all notification
 */
async cancelAllNotifications() {
  try {
    await notificationManager.cancelAll();
    logger.info(TAG, `cancel all success`);
  } catch (err) {
    if (err) {
      logger.info(TAG, `cancel all err ${JSON.stringify(err)}`);
    }
  }
}

    }

    export let notificationUtil = new NotificationUtil();

  • 允许发送通知：在进入[Index.ets] 前通过notificationUtil.enableNotification()调用notification.requestEnableNotification()接口向用户请求发送通知；

    /*

    • Copyright (c) 2023 Huawei Device Co., Ltd.
    • Licensed under the Apache License, Version 2.0 (the "License")
    • you may not use this file except in compliance with the License.
    • You may obtain a copy of the License at
    • http://www.apache.org/licenses/LICENSE-2.0
    • Unless required by applicable law or agreed to in writing, software
    • distributed under the License is distributed on an "AS IS" BASIS,
    • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    • See the License for the specific language governing permissions and
    • limitations under the License.
      */

    import { NotificationList } from '../components/NotificationList';
    import { NoticePublish } from '../components/NotificationPublish';

    export interface TabImage {
    selectedImage: Resource,
    unselectedImage: Resource,
    }

    const MESSAGE_TAB: TabImage = {
    selectedImage: $r('app.media.ic_messages_filled'),
    unselectedImage: $r('app.media.ic_messages'),
    }
    const NOTIFICATION_TAB: TabImage = {
    selectedImage: $r('app.media.ic_public_send_filled'),
    unselectedImage: $r('app.media.ic_public_send'),
    }

    interface TAB_INDEX_TYPE {
    MESSAGE_TAB: number
    NOTIFICATION_TAB: number
    }

    const TAB_INDEX: TAB_INDEX_TYPE = {
    MESSAGE_TAB: 0,
    NOTIFICATION_TAB: 1
    }

    @Entry
    @Component
    struct Index {
    @State tabsIndex: number = 0

    @Builder TabBarBuilder(index: number, item: TabImage, tabBarName: Resource) {

  Column() {
    Image(this.tabsIndex === index ? item.selectedImage : item.unselectedImage)
      .width(24)
      .height(24)
      .margin({ bottom: 10 })
    Text(tabBarName)
      .fontSize(10)

  }
  .width('100%')
  .padding({ top: 0, bottom: 0 })
  .alignItems(HorizontalAlign.Center)
  .id(`tabBar${index}`)
}

build() {
  Column() {
    Tabs({ barPosition: BarPosition.End }) {
      TabContent() {
        Column() {
          if (this.tabsIndex === TAB_INDEX.MESSAGE_TAB) {
            NotificationList()
          }
          Blank()
        }
        .height('100%')
      }
      .tabBar(this.TabBarBuilder(TAB_INDEX.MESSAGE_TAB, MESSAGE_TAB, $r('app.string.messages_list_title')))

      TabContent() {
        Column() {
          NoticePublish()
          Blank()
        }
        .height('100%')
      }
      .tabBar(this.TabBarBuilder(TAB_INDEX.NOTIFICATION_TAB, NOTIFICATION_TAB, $r('app.string.notification_publish_title')),)
    }
    .barHeight(74)
    .barWidth('100%')
    .vertical(false)
    .onChange((index: number) => {
      this.tabsIndex = index
    })

  }.width('100%').height('100%')
  .backgroundColor($r('app.color.background_light_gray'))
}

    }

  • 发送通知：通过publishNotification()封装发布通知的接口；

  • 获取应用所有消息通知、取消相关类型通知，角标管理接口封装在NotificationManagementUtil，源码参考：[NotificationManagementUtil.ets]

    /*

    • Copyright (c) 2023 Huawei Device Co., Ltd.
    • Licensed under the Apache License, Version 2.0 (the "License");
    • you may not use this file except in compliance with the License.
    • You may obtain a copy of the License at
    • http://www.apache.org/licenses/LICENSE-2.0
    • Unless required by applicable law or agreed to in writing, software
    • distributed under the License is distributed on an "AS IS" BASIS,
    • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    • See the License for the specific language governing permissions and
    • limitations under the License.
      */
      import { notificationManager } from '@kit.NotificationKit';
      import { logger } from '../util/Logger';

    const NOTIFICATION_TYPE_SIZE = 5;

    export interface getAllNotificationsResultType {
    groupNotifications: Array<Array<notificationManager.NotificationRequest>>
    countsByType: Array<number>
    }

    // 通知管理
    class NotificationManagementUtil {
    typeNotifications: Array<Array<notificationManager.NotificationRequest>> = new Array(NOTIFICATION_TYPE_SIZE + 1);
    countsByType: Array<number> = new Array(NOTIFICATION_TYPE_SIZE + 1);
    badgeNum: number = 0;

    constructor() {
  this.countsByType.fill(0);
  for (let i = 0; i < NOTIFICATION_TYPE_SIZE + 1; i++) {
    this.typeNotifications[i] = new Array();
  }
  // 获取当前应用所有通知
  notificationManager.getActiveNotifications().then((notifications) => {
    for (let i = 0; i < notifications.length; i++) {
      let typeId = notifications[i].content.notificationContentType;
      this.countsByType[typeId as number] += 1;
      this.typeNotifications[typeId as number].push(notifications[i]);
    }
    logger.info(`getAllActiveNotifications success, data: ${JSON.stringify(notifications)}`)
    // 计算角标数量
    this.countsByType.forEach((num: number) => {
      this.badgeNum += num;
    })
  })
}

// 取消属于该类型的通知
cancelNotificationType(typeId: number) {
  this.typeNotifications[typeId].forEach(item => {
    notificationManager.cancel(item.id);
  })
}

// 设置角标
async setBadgeNumber(num: number) {
  await notificationManager.setBadgeNumber(num).then(() => {
    this.badgeNum = num;
    logger.info("displayBadge success");
  });
}

// 获取角标数量
getBadgeNumber(): number {
  return this.badgeNum;
}

// 添加一条消息
async addNotification(notification: notificationManager.NotificationRequest) {
  const typeId: notificationManager.ContentType = notification.content.notificationContentType as notificationManager.ContentType;
  this.typeNotifications[typeId].push(notification);
  this.countsByType[typeId] += 1;
  this.badgeNum += 1;
  await notificationManagement.setBadgeNumber(this.badgeNum);
  logger.info("add Message success");
}

// 获取当前所有消息及数量
async getAllNotifications() {
  let result: getAllNotificationsResultType = {
    groupNotifications: this.typeNotifications,
    countsByType: this.countsByType
  }
  return result;
}

    }

    export let notificationManagement = new NotificationManagementUtil();

  • 获取应用所有消息通知：在constructor()构造函数中调用@ohos.notificationManager中的getActiveNotifications接口获取所有通知及相应类型通知数量，通过封装getAllNotifications()对外提供接口获取当前消息及消息数量。

  • 取消相关类型通知：通过cancelNotificationType()封装取消相关通知类型的接口；

  • 角标管理接口：通过setBadgeNumber()封装设置应用角标数量的接口，通过getBadgeNumber()封装获取当前应用角标数量的接口。

    • 添加一条通知：通过addNotification()封装接口添加一条通知到消息管理器，当发送通知的时候进行调用。

  • NotificationOperations向外提供接口，在页面中调用它们来实现功能，源码参考：[NotificationOperations.ets]

    /*

    • Copyright (c) 2023 Huawei Device Co., Ltd.
    • Licensed under the Apache License, Version 2.0 (the "License")
    • you may not use this file except in compliance with the License.
    • You may obtain a copy of the License at
    • http://www.apache.org/licenses/LICENSE-2.0
    • Unless required by applicable law or agreed to in writing, software
    • distributed under the License is distributed on an "AS IS" BASIS,
    • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    • See the License for the specific language governing permissions and
    • limitations under the License.
      */

    import { image } from '@kit.ImageKit';
    import { notificationManager } from '@kit.NotificationKit';
    import { logger, notificationUtil, notificationContentUtil, notificationRequestUtil } from '@ohos/notification';

    const TAG: string = 'Sample_Notification';
    const MULTI_LINE_CONTENT: Array<string> = ['line0', 'line1', 'line2', 'line3']; // 多行文本通知的多行文本内容

    interface NOTIFICATION_GROUP_TYPE {
    BASIC: string
    LONG_TEXT: string
    MULTI_LINE: string
    PICTURE: string
    CONVERSATION: string
    }

    const NOTIFICATION_GROUP: NOTIFICATION_GROUP_TYPE = { // 定义不同类型通知的通知组
    BASIC: 'BASIC',
    LONG_TEXT: 'LONG_TEXT',
    MULTI_LINE: 'MULTI_LINE',
    PICTURE: 'PICTURE',
    CONVERSATION: 'CONVERSATION'
    }

    export default class NotificationOperations {
    private context: Context;
    private basicContent: notificationManager.NotificationBasicContent;

    // 在初始化函数初始化基本通知类型的参数
constructor(context: Context) {
  this.context = context;
  let notificationTitle = '';
  let notificationText = this.context.resourceManager.getStringSync($r('app.string.notification_content'));
  let notificationAdditional = this.context.resourceManager.getStringSync($r('app.string.notification_additional'));
  this.basicContent = {
    title: notificationTitle,
    text: notificationText,
    additionalText: notificationAdditional
  }
}

// 发布基本类型通知
publishBasicNotification = () => {
  try {
    logger.info(TAG, 'publishBasicNotification');
    this.basicContent.title = this.context.resourceManager.getStringSync($r('app.string.basic_notification'));
    let notificationContent = notificationContentUtil.initBasicNotificationContent(this.basicContent);
    notificationUtil.publishNotification(notificationRequestUtil.initBasicNotificationRequest(notificationContent as notificationManager.NotificationContent) as notificationManager.NotificationRequest);
  } catch (error) {
    logger.info(TAG, `publishBasicNotification error, error = ${JSON.stringify(error)}`);
  }
}
// 发布长文本类型通知
publishLongTextNotification = () => {
  try {
    logger.info(TAG, 'publishLongTextNotification');
    this.basicContent.title = this.context.resourceManager.getStringSync($r('app.string.long_text_notification'));
    let notificationLongText = this.context.resourceManager.getStringSync($r('app.string.notification_long_text'));
    let notificationBriefText = this.context.resourceManager.getStringSync($r('app.string.notification_brief_text'));
    let notificationExpandedText = this.context.resourceManager.getStringSync($r('app.string.notification_expanded_title'));
    let notificationContent = notificationContentUtil.initNotificationLongTextContent(this.basicContent, notificationLongText, notificationBriefText, notificationExpandedText);
    notificationUtil.publishNotification(notificationRequestUtil.initBasicNotificationRequest(notificationContent as notificationManager.NotificationContent) as notificationManager.NotificationRequest);
  } catch (error) {
    logger.info(TAG, `publishLongTextNotification error, error = ${JSON.stringify(error)}`);
  }
}
// 发布多行文本类型通知
publishMultiLineNotification = () => {
  try {
    logger.info(TAG, 'publishMultiLineNotification');
    this.basicContent.title = this.context.resourceManager.getStringSync($r('app.string.multiline_notification'));
    let notificationBriefText = this.context.resourceManager.getStringSync($r('app.string.notification_brief_text'));
    let notificationLongTitle = this.context.resourceManager.getStringSync($r('app.string.notification_expanded_title'));
    let notificationContent = notificationContentUtil.initNotificationMultiLineContent(this.basicContent, notificationBriefText, notificationLongTitle, MULTI_LINE_CONTENT);
    notificationUtil.publishNotification(notificationRequestUtil.initBasicNotificationRequest(notificationContent as notificationManager.NotificationContent) as notificationManager.NotificationRequest);
  } catch (error) {
    logger.info(TAG, `publishMultiLineNotification error, error = ${JSON.stringify(error)}`);
  }
}
// 发布图片类型通知
publishPictureNotification = async () => {
  try {
    logger.info(TAG, 'publishPictureNotification');
    this.basicContent.title = this.context.resourceManager.getStringSync($r('app.string.picture_notification'));
    let notificationBriefText = this.context.resourceManager.getStringSync($r('app.string.notification_brief_text'));
    let notificationExpandedText = this.context.resourceManager.getStringSync($r('app.string.notification_expanded_title'));
    let imageArray = await this.context.resourceManager.getMediaContent($r('app.media.notification_icon').id);
    let imageResource = image.createImageSource(imageArray.buffer as ArrayBuffer);
    let picture = await imageResource.createPixelMap();
    let notificationContent = notificationContentUtil.initNotificationPictureContent(this.basicContent, notificationBriefText, notificationExpandedText, picture);
    notificationUtil.publishNotification(notificationRequestUtil.initBasicNotificationRequest(notificationContent as notificationManager.NotificationContent) as notificationManager.NotificationRequest);
  } catch (error) {
    logger.info(TAG, `publishPictureNotification error, error = ${JSON.stringify(error)}`);
  }
}
// 发布社交类型的通知
publishConversationNotification = async () => {
  try {
    logger.info(TAG, 'publishConversationNotification');
    this.basicContent.title = this.context.resourceManager.getStringSync($r('app.string.conversation_notification'));
    let notificationContent = notificationContentUtil.initNotificationConversationContent(this.basicContent);
    notificationUtil.publishNotification(notificationRequestUtil.initBasicNotificationRequest(notificationContent as notificationManager.NotificationContent) as notificationManager.NotificationRequest, NOTIFICATION_GROUP.CONVERSATION);
  } catch (error) {
    logger.info(TAG, `publishNotificationWithWantAgent error, error = ${JSON.stringify(error)}`);
  }
}

    }

  • 发布通知：在[Index.ets]页面中进入发送通知Tab页签，通过点击事件调用NotificationOperations中封装的对应的方法，然后从NotificationContentUtil中获取对应的主体内容content，将 content传递给NotificationRequestUtil得到完整的发布信息，最后调用NotificationUtil.publishNotification()发布内容，并调用NotificationManagementUtil的addNotification()添加一条消息；

    /*

    • Copyright (c) 2023 Huawei Device Co., Ltd.
    • Licensed under the Apache License, Version 2.0 (the "License")
    • you may not use this file except in compliance with the License.
    • You may obtain a copy of the License at
    • http://www.apache.org/licenses/LICENSE-2.0
    • Unless required by applicable law or agreed to in writing, software
    • distributed under the License is distributed on an "AS IS" BASIS,
    • WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    • See the License for the specific language governing permissions and
    • limitations under the License.
      */

    import { NotificationList } from '../components/NotificationList';
    import { NoticePublish } from '../components/NotificationPublish';

    export interface TabImage {
    selectedImage: Resource,
    unselectedImage: Resource,
    }

    const MESSAGE_TAB: TabImage = {
    selectedImage: $r('app.media.ic_messages_filled'),
    unselectedImage: $r('app.media.ic_messages'),
    }
    const NOTIFICATION_TAB: TabImage = {
    selectedImage: $r('app.media.ic_public_send_filled'),
    unselectedImage: $r('app.media.ic_public_send'),
    }

    interface TAB_INDEX_TYPE {
    MESSAGE_TAB: number
    NOTIFICATION_TAB: number
    }

    const TAB_INDEX: TAB_INDEX_TYPE = {
    MESSAGE_TAB: 0,
    NOTIFICATION_TAB: 1
    }

    @Entry
    @Component
    struct Index {
    @State tabsIndex: number = 0

    @Builder TabBarBuilder(index: number, item: TabImage, tabBarName: Resource) {

  Column() {
    Image(this.tabsIndex === index ? item.selectedImage : item.unselectedImage)
      .width(24)
      .height(24)
      .margin({ bottom: 10 })
    Text(tabBarName)
      .fontSize(10)

  }
  .width('100%')
  .padding({ top: 0, bottom: 0 })
  .alignItems(HorizontalAlign.Center)
  .id(`tabBar${index}`)
}

build() {
  Column() {
    Tabs({ barPosition: BarPosition.End }) {
      TabContent() {
        Column() {
          if (this.tabsIndex === TAB_INDEX.MESSAGE_TAB) {
            NotificationList()
          }
          Blank()
        }
        .height('100%')
      }
      .tabBar(this.TabBarBuilder(TAB_INDEX.MESSAGE_TAB, MESSAGE_TAB, $r('app.string.messages_list_title')))

      TabContent() {
        Column() {
          NoticePublish()
          Blank()
        }
        .height('100%')
      }
      .tabBar(this.TabBarBuilder(TAB_INDEX.NOTIFICATION_TAB, NOTIFICATION_TAB, $r('app.string.notification_publish_title')),)
    }
    .barHeight(74)
    .barWidth('100%')
    .vertical(false)
    .onChange((index: number) => {
      this.tabsIndex = index
    })

  }.width('100%').height('100%')
  .backgroundColor($r('app.color.background_light_gray'))
}

    }

以上就是本篇文章所带来的鸿蒙开发中一小部分技术讲解；想要学习完整的鸿蒙全栈技术。可以在结尾找我可全部拿到！

下面是鸿蒙的完整学习路线 ，展示如下：

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鸿蒙【北向应用开发+南向系统层开发】文档

鸿蒙【基础+实战项目】视频

鸿蒙面经

为了避免大家在学习过程中产生更多的时间成本，对比我把以上内容全部放在了↓↓↓想要的可以自拿喔！谢谢大家观看！

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