beacons_plugin

This plugin is developed to scan nearby iBeacons on both Android iOS. This library makes it easier to scan & range nearby BLE beacons and read their proximity values.

Android

For Android change min SDK version:

defaultConfig {
  ...
  minSdkVersion 19
  ...
}

Change your Android Project's MainActivity class to following:

import com.umair.beacons_plugin.BeaconsPlugin
import io.flutter.embedding.android.FlutterActivity

class MainActivity : FlutterActivity(){

    override fun onPause() {
        super.onPause()

        //Start Background service to scan BLE devices
        BeaconsPlugin.startBackgroundService(this)
    }

    override fun onResume() {
        super.onResume()

        //Stop Background service, app is in foreground
        BeaconsPlugin.stopBackgroundService(this)
    }
}

That's it for Android.

iOS

In your AppDelegate.swift file change it to like this:

    
    import UIKit
    import Flutter
    import CoreLocation
    
    @UIApplicationMain
    @objc class AppDelegate: FlutterAppDelegate {
    
        let locationManager = CLLocationManager()
    
        override func application(
            _ application: UIApplication,
            didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
        ) -> Bool {
    
            locationManager.requestAlwaysAuthorization()
            GeneratedPluginRegistrant.register(with: self)
    
            return super.application(application, didFinishLaunchingWithOptions: launchOptions)
        }
    }

In your Info.plist file add following lines:

    <dict>
      <key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
    	<string>App needs location permissions to scan nearby beacons.</string>
    	<key>NSLocationWhenInUseUsageDescription</key>
    	<string>App needs location permissions to scan nearby beacons.</string>
    	<key>NSLocationAlwaysUsageDescription</key>
    	<string>App needs location permissions to scan nearby beacons.</string>
    </dict>

Install

In your pubspec.yaml

dependencies:
  beacons_plugin: [LATEST_VERSION]

import 'dart:async';
import 'dart:io' show Platform;
import 'package:flutter/services.dart';
import 'package:beacons_plugin/beacons_plugin.dart';

Ranging Beacons & Setting Up

    // if you need to monitor also major and minor use the original version and not this fork
    BeaconsPlugin.addRegion("myBeacon", "01022022-f88f-0000-00ae-9605fd9bb620")
        .then((result) {
          print(result);
        });
    
    //Send 'true' to run in background [OPTIONAL]
    await BeaconsPlugin.runInBackground(true);
    
    //IMPORTANT: Start monitoring once scanner is setup & ready (only for Android)
    if (Platform.isAndroid) {
      BeaconsPlugin.channel.setMethodCallHandler((call) async {
        if (call.method == 'scannerReady') {
          await BeaconsPlugin.startMonitoring();
        }
      });
    } else if (Platform.isIOS) {
      await BeaconsPlugin.startMonitoring();
    }
    

Listen To Beacon Scan Results as Stream

    
    final StreamController<String> beaconEventsController = StreamController<String>.broadcast();
    BeaconsPlugin.listenToBeacons(beaconEventsController);
    
    beaconEventsController.stream.listen(
        (data) {
          if (data.isNotEmpty) {
            setState(() {
              _beaconResult = data;
            });
            print("Beacons DataReceived: " + data);
          }
        },
        onDone: () {},
        onError: (error) {
          print("Error: $error");
        });

Stop Listening to Beacons

     await BeaconsPlugin.stopMonitoring();

Run in Background

    //Send 'true' to run in background
     await BeaconsPlugin.runInBackground(true);

Clear Regions

    await BeaconsPlugin.clearRegions();

Set the level of debug messages

    //Valid values: 0 = no messages, 1 = errors, 2 = all messages
    await BeaconsPlugin.setDebugLevel(int value);

Set Prominent Disclosure message (Android 10)

See: Link

    if (Platform.isAndroid) {
    
      //Prominent disclosure
      await BeaconsPlugin.setDisclosureDialogMessage(
          title: "Need Location Permission",
          message: "This app collects location data to work with beacons.");

      //Only in case, you want the dialog to be shown again. By Default, dialog will never be shown if permissions are granted.
      await BeaconsPlugin.clearDisclosureDialogShowFlag(false);
    }

Scan Results

Data	Android	iOS
name	Yes	Yes
uuid	Yes	Yes
major	Yes	Yes
minor	Yes	Yes
distance	Yes	Yes
proximity	Yes	Yes
rssi	Yes	Yes
macAddress	Yes	No
txPower	Yes	No

Native Libraries

• For iOS: CoreLocation
• For Android: Android-Beacon-Library

Author

Flutter Beacons plugin is developed by Umair Adil. You can email me at [email protected] for any queries.