flutter_blue_background 0.0.1

Flutter Blue Background enables BLE functionality in the background for Android and iOS.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_blue_background/flutter_blue_background.dart';
import 'package:flutter_blue_background_example/permissions/bluetooth_adapter.dart';
import 'package:flutter_blue_background_example/permissions/check_status.dart';
import 'dart:async';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  String readData = "";

  // @override
  // void dispose() {
  //   WidgetsBinding.instance.removeObserver(this);
  //   super.dispose();
  // }
  //
  // @override
  // void didChangeAppLifecycleState(AppLifecycleState state) {
  //   if (state == AppLifecycleState.paused) {
  //     // Your code to execute when the app is minimized
  //     IosBackPlugin.executeInBackground(() {
  //       Timer.periodic(Duration(seconds: 15), (timer) async {
  //         print('execute function after 5 sec ');
  //         final flutterReactiveBle = FlutterReactiveBle();
  //         flutterReactiveBle.scanForDevices(withServices: [], scanMode: ScanMode.lowLatency).listen((device) {
  //           print('scan device is ${device.name}');
  //           if(device.name == "grotz testing-"){
  //             print('device find');
  //           }
  //           //code for handling results
  //         }, onError: (e) {
  //           print('error while scanning $e');
  //           //code for handling error
  //         });
  //
  //       });
  //       print("Executing function in the background");
  //     });
  //   }
  // }


  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            children: [
              const SizedBox(height: 20,),
              ElevatedButton(
                  onPressed: () async {

                    // Android Background Work
                    // Request Bluetooth and location permissions

                    // Enable Bluetooth and Location
                    BluetoothAdapter.initBleStateStream();

                    // Check bluetooth, location and media permission
                    if(await PermissionEnable().check() == true) {
                      await FlutterBlueBackground.startFlutterBackgroundService(() async {
                        await FlutterBlueBackground.connectToDevice(
                            deviceName: 'laser gun-testing',
                            serviceUuid: '4fafc201-1fb5-459e-8fcc-c5c9c331914b',
                            characteristicUuid: 'beb5483e-36e1-4688-b7f5-ea07361b26a8'
                        );

                        // Write value on specific characteristic
                        await FlutterBlueBackground.writeData(
                            characteristicUuid: 'beb5483e-36e1-4688-b7f5-ea07361b26a8',
                            data: 'something'
                        );

                        String? data = await FlutterBlueBackground.readData(
                            characteristicUuid: 'beb5483e-36e1-4688-b7f5-ea07361b26a8'
                        );
                        // print('received value of read is $data');
                      },);
                    }



                  },
                  child: const Text('Start BG Android Service')
              ),
              const SizedBox(height: 20,),
              ElevatedButton(onPressed: () async {
                // Ios Background Work below

                await FlutterBlueBackground.startFlutterBackgroundService(() {

                  Timer.periodic(const Duration(seconds: 8), (timer) async {
                    await FlutterBlueBackground.connectToDevice(
                        deviceName: 'Esp32',
                        serviceUuid: '4fafc201-1fb5-459e-8fcc-c5c9c331914b',
                        characteristicUuid: 'beb5483e-36e1-4688-b7f5-ea07361b26a8'
                    );

                    // Write value on specific characteristic
                    await FlutterBlueBackground.writeData(
                        serviceUuid: '4fafc201-1fb5-459e-8fcc-c5c9c331914b',
                        characteristicUuid: 'beb5483e-36e1-4688-b7f5-ea07361b26a8',
                        data: 'something'
                    );

                    String? data = await FlutterBlueBackground.readData(
                        serviceUuid: '4fafc201-1fb5-459e-8fcc-c5c9c331914b',
                        characteristicUuid: 'beb5483e-36e1-4688-b7f5-ea07361b26a8'
                    );
                    // print("data in main is $data");
                  });

                  print("Executing function in the background");
                });


              },
                  child: const Text('Start BG IOS Service')
              ),
              const SizedBox(height: 30,),
              Text("Read value is $readData" ,
              style: const TextStyle(
                fontSize: 22
              ),),
              const SizedBox(height: 20,),
              ElevatedButton(
                  onPressed: () async {
                    await FlutterBlueBackground.stopFlutterBackgroundService();
                  }, child: const Text('Start/Stop Service')
              ),
              const SizedBox(height: 20,),
              ElevatedButton(
                  onPressed: () async {
                    await FlutterBlueBackground.clearReadStorage();
                  }, child: const Text('Clear Read Data List')
              ),


            ],
          ),
        ),
      ),
    );
  }

}