Flutter Analytics

A barebones Analytics SDK to collect anonymous metadata from flutter apps.

Usage

import 'package:flutter_analytics/flutter_analytics.dart' show Analytics;

// initial setup to run once on application lifecycle
Analytics().setup(destinations: ['http://localhost:3000/analytics']);

// uniquely identify group of users
Analytics().group('someGroupId', {'numTrait': 7, 'txtTrait': 'tGroup'});

// uniquely identify current user and its traits
Analytics().identify('anUserId', {'numTrait': 5, 'txtTrait': 'uUser'});

// identify current screen being viewed
Analytics().screen('My Screen', {'numProp': -1, 'txtProp': 'pScreen'});

// track discrete events
Analytics().track('Any Event', {'numProp': 3, 'txtProp': 'pTrack'});

Server-side consumption example

Receive batches of flutter_analytics on AWS Lambda and ship them to S3:

from base64 import b64decode
from boto3 import client
from datetime import datetime
from dateutil.parser import parse
from gzip import GzipFile
from io import BytesIO
from json import dumps, loads
from zlib import decompress, MAX_WBITS

s3 = client('s3')

bucket = 'my.bucket'
output_file = 'output.json'

def lambda_handler(event, context):
  try:
    return {'statusCode': 200, 'body': upload(event)}
  except Exception as e:
    return {'statusCode': 500, 'body': str(e)}


def upload(event):
  decoded = b64decode(loads(event['body'])['batch'])

  batch = loads(decompress(decoded, MAX_WBITS | 16))

  gz_body = BytesIO()

  gz = GzipFile(None, 'wb', 1, gz_body)
  gz.write(dumps(batch).encode('utf-8'))
  gz.close()

  s3.put_object(
    Body=gz_body.getvalue(),
    Bucket=bucket,
    Key=output_file,
    ContentEncoding='gzip',
    ContentType='application/json'
  )

  return '{"success":true}'

OTA remote configuration

A remote config file can be supplied like this:

Analytics().setup(
  configUrl: 'https://gist.githubusercontent.com/oakromulo/7678b2b187a24e47c0ba93085575477d/raw/e72767273e4e6a73d14377f650be63d66033a6e3/config.json'
)

Location

Android

In order to use the location plugin in Android, you have to add this permission in AndroidManifest.xml :

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

Update your gradle.properties file with this:

android.enableJetifier=true
android.useAndroidX=true
org.gradle.jvmargs=-Xmx1536M

Please also make sure that you have those dependencies in your build.gradle:

  dependencies {
      classpath 'com.android.tools.build:gradle:3.3.0'
      classpath 'com.google.gms:google-services:4.2.0'
  }
...
  compileSdkVersion 28

iOS

For device location information in iOS the following permission descriptions must be added to Info.plist:

NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription

Warning: there is a currently a bug in iOS simulator in which you have to manually select a Location several times in order for the Simulator to actually send data. Please keep that in mind when testing in iOS simulator.

The OnNmeaMessageListener property is only available for minimum SDK of 24.

Run the example on a simulator

cd ~/flutter_analytics/example
flutter packages get
open -a simulator
flutter run

Run integration tests

cd ~/flutter_analytics/test
flutter packages get
APP_CONFIG_URL="https://remote.config" flutter pub run tool/tool_env.dart
flutter drive --target=lib/main.dart

License

MIT