SmartBandApi.dart

Purpose

This file manages communication between the Flutter app and smart bands using the veepoo_sdk. It controls connection handling, data collection (e.g., heart rate, SpO2, blood pressure), and interaction with native device features.

Imports

import 'dart:convert';
import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:veepoo_sdk/veepoo_sdk.dart';
import 'package:veepoo_sdk/model/search_result.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:veepoo_sdk/model/bp_data.dart';
import 'package:veepoo_sdk/model/spo2h_data.dart';
import 'package:veepoo_sdk/model/origin_data.dart';
import 'package:veepoo_sdk/model/origin_v3_data.dart';
import 'package:veepoo_sdk/model/spo2h_origin_data.dart';
import 'package:geolocator/geolocator.dart';
import 'package:flutter_reactive_ble/flutter_reactive_ble.dart';
import 'package:collection/collection.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

import '../Service/AppLocal.dart';
import '../Service/StatusChecker.dart';

  • Uses veepoo_sdk to interface with smart band hardware.

  • Uses permission_handler, geolocator, fluttertoast, and I/O libraries.

  • Supports localization and BLE checks.

Band Discovery and Connection

The SDK supports BLE scanning and connection. The following components are involved:

BLE Device Scanning

Smart bands are scanned using the veepoo_sdk methods.

Connect to Band

Connects to a selected smart band using SearchResult or a device ID.

Data Collection

Data types supported via the SDK:

  • Heart Rate (HR)

  • SpO2 (Oxygen Saturation)

  • Blood Pressure (BP)

  • Step/Activity Data

  • Sleep Data

  • Original Raw Data (v3, SpO2H, etc.)

SDK models used:

BpData, Spo2hData, OriginData, OriginV3Data, Spo2hOriginData

These classes are parsed and stored using file I/O or memory.

Permissions

Permission.location
Permission.bluetooth
Permission.storage

Proper permissions must be requested and handled before BLE scanning or saving files.

Localization Support

AppLocal.getText(context, 'some_key')

Localization is integrated using custom AppLocal service and flutter_localizations.

File Storage

Uses path_provider and dart:io to persist collected data.

final directory = await getApplicationDocumentsDirectory();
final file = File('${directory.path}/smartband_data.json');
await file.writeAsString(json.encode(data));

Collected biometric data can be saved for later upload or analysis.

Dependencies

  • veepoo_sdk: Core SDK for smart band communication

  • geolocator, permission_handler, fluttertoast: for runtime environment setup

  • AppLocal: For localized UI messages

  • Native Bluetooth and BLE permission support