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Battery Monitor Wearable

A HarmonyOS ArkTS wearable app that continuously monitors the device battery level, provides background notifications, and stores history in a local RDB. Users can measure instantly, view history, and see battery status updates directly on their Huawei Watch.

Preview

Use Cases

• Monitor battery percentage in the background
• Receive notifications when battery is low/mid/ok
• Measure current battery level manually
• View detailed battery history in a list with timestamps
• Smooth navigation with splash, index, and detail pages

Technology

Stack

• Languages: ArkTS (TypeScript)
• UI: ArkUI (@kit.ArkUI)
• Tools/IDE: DevEco Studio 5.1.0.260
• SDK: HarmonyOS SDK 5.1.0.54
• Libraries: Built-in kits (SensorServiceKit, BackgroundTasksKit, NotificationKit, ArkData)
• Database: RelationalStore (RDB) for local persistence

Required Permissions

• ohos.permission.RUNNING_TASKS
• ohos.permission.NOTIFICATION_CONTROLLER

Directory Structure

entry/
└── ets/
    ├── animation/
    │   └── LottieAnimation.ets
    ├── data/
    │   └── BatteryTable.ets
    ├── model/
    │   └── BatteryRecord.ets
    ├── pages/
    │   ├── SplashPage.ets
    │   ├── Index.ets
    │   └── BatteryDetailPage.ets
    ├── util/
    │   ├── ConstantUI.ets
    │   └── CommonConstantsDb.ets
    ├── entryability/
    │   └── EntryAbility.ets
    └── entrybackupability/
        └── EntryBackupAbility.ets

Constraints and Restrictions

Supported Device

• Huawei Watch 5

App Limits

• Local-only data (no external backend)
• Optimized for wearable small screens
• ArkUI navigation with slide transitions
• Compact UI components for better readability on wearables

License

Battery Monitor Wearable is distributed under the terms of the MIT License
See the LICENSE for more information.