[firebase_analytics] Tutorial "Add Firebase to your Flutter app" did not work

[suztomo]

Describe the bug

https://firebase.google.com/docs/flutter/setup does not work for Firebase Analytics.

Steps to Reproduce

1. Go through Flutter Firebase tutorial with Firebase Analytics: https://firebase.google.com/docs/flutter/setup. Using https://github.com/FirebaseExtended/flutterfire/tree/master/packages/firebase_analytics/example
   
   Ensure GoogleService-Info.plist is in XCode:
   
   I added "-FIRDebugEnabled" to scheme.
2. Wait 24 hours
3. Firebase Analytics does not show anything:
   
   

Expected behavior
Firebase Analytics show some data from the app.

Target Platform:
iOS
Target OS version/browser:
iOS 13.2 (Simulator)
Devices:
iOS Simulator iPhone 11 Pro Max
and
iPhone SE (not simulator)

Logs

Here is logs from the application startup in XCode when I ran it for the simulator:

2019-11-07 08:49:44.125876-0500 Runner[88829:6937609]  - <AppMeasurement>[I-ACS036002] Analytics screen reporting is enabled. Call +[FIRAnalytics setScreenName:setScreenClass:] to set the screen name or override the default screen class name. To disable screen reporting, set the flag FirebaseScreenReportingEnabled to NO (boolean) in the Info.plist
2019-11-07 08:49:44.260443-0500 Runner[88829:6937320] Configuring the default Firebase app...
2019-11-07 08:49:44.308298-0500 Runner[88829:6937320] Configured the default Firebase app __FIRAPP_DEFAULT.
2019-11-07 08:49:44.363260-0500 Runner[88829:6937642] flutter: Observatory listening on http://127.0.0.1:62660/uT7_mQy6iVw=/
2019-11-07 08:49:44.941378-0500 Runner[88829:6937609] 6.11.0 - [Firebase/Core][I-COR000004] App with name __FIRAPP_DEFAULT does not exist.
2019-11-07 08:49:44.941701-0500 Runner[88829:6937609] 6.11.0 - [Firebase/Core][I-COR000001] Configuring the default app.
2019-11-07 08:49:44.942312-0500 Runner[88829:6937609] 6.11.0 - [Firebase/Core][I-COR000033] Data Collection flag is not set.
2019-11-07 08:49:44.942488-0500 Runner[88829:6937609] 6.11.0 - [Firebase/InstanceID][I-IID023000] Info is not found in Keychain. OSStatus: -25300. Keychain query: {
    acct = "com.appspot.sztm.HelloFirebaseSztm";
    class = genp;
    gena = "com.google.iid";
    "m_Limit" = "m_LimitAll";
    "r_Attributes" = 1;
    "r_Data" = 1;
    svce = "com.google.iid.checkin";
}
2019-11-07 08:49:44.942640-0500 Runner[88829:6937609] 6.11.0 - [Firebase/InstanceID][I-IID023000] Info is not found in Keychain. OSStatus: -25300. Keychain query: {
    atag = {length = 18, bytes = 0x636f6d2e676f6f676c652e6969642d7c4b7c};
    class = keys;
    "r_Ref" = 1;
    type = 42;
}
2019-11-07 08:49:44.942776-0500 Runner[88829:6937609] 6.11.0 - [Firebase/InstanceID][I-IID023000] Info is not found in Keychain. OSStatus: -25300. Keychain query: {
    atag = {length = 18, bytes = 0x636f6d2e676f6f676c652e6969642d7c507c};
    class = keys;
    "r_Ref" = 1;
    type = 42;
}
2019-11-07 08:49:44.947071-0500 Runner[88829:6937609] 6.11.0 - [Firebase/InstanceID][I-IID009000] No keypair info is found with tag com.google.iid-|K|
2019-11-07 08:49:44.947249-0500 Runner[88829:6937609] 6.11.0 - [Firebase/InstanceID][I-IID009006] There's no legacy keypair so no need to do migration.
2019-11-07 08:49:44.947376-0500 Runner[88829:6937609] 6.11.0 - [Firebase/InstanceID][I-IID023000] Info is not found in Keychain. OSStatus: -25300. Keychain query: {
    acct = "com.appspot.sztm.HelloFirebaseSztm";
    class = genp;
    gena = "com.google.iid-tokens";
    "m_Limit" = "m_LimitAll";
    "r_Attributes" = 1;
    "r_Data" = 1;
    svce = "947567047323:*";
}
2019-11-07 08:49:44.947527-0500 Runner[88829:6937609] 6.11.0 - [Firebase/Analytics][I-ACS024000] Debug mode is on
2019-11-07 08:49:44.947649-0500 Runner[88829:6937609] 6.11.0 - [Firebase/Analytics][I-ACS005000] The AdSupport Framework is not currently linked. Some features will not function properly. Learn more at http://goo.gl/9vSsPb
2019-11-07 08:49:45.261748-0500 Runner[88829:6937611] 6.11.0 - [GULReachability][I-REA902003] Monitoring the network status
2019-11-07 08:49:45.262162-0500 Runner[88829:6937611] 6.11.0 - [Firebase/Analytics][I-ACS023007] Analytics v.60103000 started
2019-11-07 08:49:45.264925-0500 Runner[88829:6937611] 6.11.0 - [Firebase/Analytics][I-ACS023008] To disable debug logging set the following application argument: -noFIRAnalyticsDebugEnabled (see http://goo.gl/RfcP7r)
2019-11-07 08:49:45.265908-0500 Runner[88829:6937611] 6.11.0 - [Firebase/Analytics][I-ACS023009] Debug logging enabled
2019-11-07 08:49:45.277997-0500 Runner[88829:6937644] 6.11.0 - [Firebase/Analytics][I-ACS031003] setScreenName:screenClass: must be called after a view controller has appeared
2019-11-07 08:49:45.280275-0500 Runner[88829:6937644] 6.11.0 - [GULReachability][I-REA902004] Network status has changed. Code:2, status:Connected
2019-11-07 08:49:45.311344-0500 Runner[88829:6937644] 6.11.0 - [Firebase/Analytics][I-ACS031010] Tracking view controller. Class, ID: FlutterViewController, 4688821523934354282
2019-11-07 08:49:45.311614-0500 Runner[88829:6937644] 6.11.0 - [Firebase/Analytics][I-ACS031006] View controller already tracked. Class, ID: FlutterViewController, 4688821523934354282
2019-11-07 08:49:45.632050-0500 Runner[88829:6937644] 6.11.0 - [GoogleUtilities/AppDelegateSwizzler][I-SWZ001008] Successfully created App Delegate Proxy automatically. To disable the proxy, set the flag GoogleUtilitiesAppDelegateProxyEnabled to NO (Boolean) in the Info.plist
2019-11-07 08:49:46.473780-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS029017] Configuration was not found in database. The configuration will be fetched from the network when necessary
2019-11-07 08:49:46.474840-0500 Runner[88829:6937644] 6.11.0 - [Firebase/Analytics][I-ACS023016] Analytics is ready to receive events
2019-11-07 08:49:46.619744-0500 Runner[88829:6937644] 6.11.0 - [Firebase/Analytics][I-ACS032003] iAd framework is not linked. Search Ad Attribution Reporter is disabled.
2019-11-07 08:49:46.623121-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS002002] Measurement timer scheduled to fire in approx. (s): -76.61791610717773
2019-11-07 08:49:46.623653-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023028] Upload task scheduled to be executed in approx. (s): -76.61791610717773
2019-11-07 08:49:46.623898-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS033003] Scheduling user engagement timer
2019-11-07 08:49:46.624197-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS002002] Engagement timer scheduled to fire in approx. (s): 3600
2019-11-07 08:49:46.625797-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023012] Analytics enabled
2019-11-07 08:49:46.626540-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023051] Logging event: origin, name, params: auto, screen_view (_vs), {
    ga_event_origin (_o) = auto;
    ga_screen_class (_sc) = FlutterViewController;
    ga_screen_id (_si) = 4688821523934354282;
}
2019-11-07 08:49:46.627417-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023073] Debug mode is enabled. Marking event as debug and real-time. Event name, parameters: screen_view (_vs), {
    ga_debug (_dbg) = 1;
    ga_event_origin (_o) = auto;
    ga_realtime (_r) = 1;
    ga_screen_class (_sc) = FlutterViewController;
    ga_screen_id (_si) = 4688821523934354282;
}
2019-11-07 08:49:47.086213-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023072] Event logged. Event name, event params: screen_view (_vs), {
    ga_debug (_dbg) = 1;
    ga_event_origin (_o) = auto;
    ga_realtime (_r) = 1;
    ga_screen_class (_sc) = FlutterViewController;
    ga_screen_id (_si) = 4688821523934354282;
}
2019-11-07 08:49:47.103606-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023027] Do not schedule an upload task. Task already exists. Will be executed in seconds: -77.08841514587402
2019-11-07 08:49:47.108694-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS002001] Measurement timer fired
2019-11-07 08:49:47.113948-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS002003] Measurement timer canceled
2019-11-07 08:49:47.114452-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023033] Starting data upload
2019-11-07 08:49:47.115125-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023037] No data to upload
2019-11-07 08:49:47.115603-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023126] Fetching configuration from the server
2019-11-07 08:49:47.241090-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS900001] Downloading data. Host: https://app-measurement.com/config/app/1:947567047323:ios:c8456dabdaf3d0d3944c3e?platform=ios&app_instance_id=160A9A2BD9C24151A452C298D95C4A3F&gmp_version=60103
2019-11-07 08:49:47.349510-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS901006] Received SSL challenge for host. Host: https://app-measurement.com/config/app/1:947567047323:ios:c8456dabdaf3d0d3944c3e?platform=ios&app_instance_id=160A9A2BD9C24151A452C298D95C4A3F&gmp_version=60103
2019-11-07 08:49:47.577356-0500 Runner[88829:6937611] 6.11.0 - [Firebase/Analytics][I-ACS023127] Fetched configuration. Status code: 200
2019-11-07 08:49:47.594505-0500 Runner[88829:6937611] 6.11.0 - [Firebase/Analytics][I-ACS023133] Successful fetched configuration from the server. Got network response. Code, size: 200, 236
<ERROR> MeasurementConfig decoder failed: varint overflow
2019-11-07 08:49:47.622003-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023135] Configuration data is invalid.
2019-11-07 08:49:47.633837-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS034010] Transaction failed
2019-11-07 08:49:47.643274-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023033] Starting data upload
2019-11-07 08:49:47.645430-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023105] Event is not subject to real-time event count daily limit. Marking an event as real-time. Event name, parameters: user_engagement (_e), {
    engagement_time_msec (_et) = 1;
    ga_debug (_dbg) = 1;
    ga_event_origin (_o) = auto;
    ga_realtime (_r) = 1;
    ga_screen (_sn) = /;
    ga_screen_class (_sc) = Flutter;
    ga_screen_id (_si) = 1;
}
2019-11-07 08:49:47.646820-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023105] Event is not subject to real-time event count daily limit. Marking an event as real-time. Event name, parameters: screen_view (_vs), {
    ga_debug (_dbg) = 1;
    ga_event_origin (_o) = auto;
    ga_realtime (_r) = 1;
    ga_screen_class (_sc) = FlutterViewController;
    ga_screen_id (_si) = 1;
}
2019-11-07 08:49:47.647596-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023080] Setting user property. Name, value: lifetime_user_engagement (_lte), 12
2019-11-07 08:49:47.648459-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023087] User property set. Name, value: lifetime_user_engagement (_lte), 12
2019-11-07 08:49:47.649067-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023080] Setting user property. Name, value: session_user_engagement (_se), 12
2019-11-07 08:49:47.649684-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023087] User property set. Name, value: session_user_engagement (_se), 12
2019-11-07 08:49:47.649989-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS012018] Saving bundle. size (bytes): 421
2019-11-07 08:49:47.650241-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023116] Bundle added to the upload queue. BundleID, timestamp (ms): 13, 1573134585297
2019-11-07 08:49:47.861894-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023038] Uploading events. Elapsed time since last successful upload (s): 41228.05698013306
2019-11-07 08:49:47.871812-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS023039] Measurement data sent to network. Timestamp (ms), data: 1573134587851, <APMPBMeasurementBatch: 0x60000084e630>
2019-11-07 08:49:47.882457-0500 Runner[88829:6937616] 6.11.0 - [Firebase/Analytics][I-ACS900000] Uploading data. Host: https://app-measurement.com/a
2019-11-07 08:49:48.211802-0500 Runner[88829:6937611] 6.11.0 - [Firebase/Analytics][I-ACS901006] Received SSL challenge for host. Host: https://app-measurement.com/a
2019-11-07 08:49:48.265827-0500 Runner[88829:6937610] 6.11.0 - [Firebase/Analytics][I-ACS023044] Successful upload. Got network response. Code, size: 204, -1
2019-11-07 08:49:48.268232-0500 Runner[88829:6937610] 6.11.0 - [Firebase/Analytics][I-ACS002002] Measurement timer scheduled to fire in approx. (s): -1.970462083816528
2019-11-07 08:49:48.268810-0500 Runner[88829:6937610] 6.11.0 - [Firebase/Analytics][I-ACS023028] Upload task scheduled to be executed in approx. (s): -1.970462083816528
2019-11-07 08:49:48.393171-0500 Runner[88829:6937644] 6.11.0 - [Firebase/Analytics][I-ACS023024] No data to upload. Upload task will not be scheduled
2019-11-07 08:49:48.398344-0500 Runner[88829:6937644] 6.11.0 - [Firebase/Analytics][I-ACS002003] Measurement timer canceled

~/Documents/hello_firebase_sztm $ flutter analyze
Analyzing hello_firebase_sztm...                                        
No issues found! (ran in 4.2s)

suztomo@suztomonoMBP.verizon.net ~/Documents/hello_firebase_sztm
~/Documents/hello_firebase_sztm $ flutter doctor -v
[✓] Flutter (Channel stable, v1.9.1+hotfix.6, on Mac OS X 10.14.6 18G87, locale en-JP)
    • Flutter version 1.9.1+hotfix.6 at /Users/suztomo/local/flutter
    • Framework revision 68587a0916 (8 weeks ago), 2019-09-13 19:46:58 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0

[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from: https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK components.
      (or visit https://flutter.dev/setup/#android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
      You may also want to add it to your PATH environment variable.


[✓] Xcode - develop for iOS and macOS (Xcode 11.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.2, Build version 11B52
    • CocoaPods version 1.8.4

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/setup/#android-setup for detailed instructions).

[!] IntelliJ IDEA Community Edition (version 2019.1.4)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • For information about installing plugins, see
      https://flutter.dev/intellij-setup/#installing-the-plugins

[✓] VS Code (version 1.39.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.6.0

[✓] Connected device (1 available)
    • iPhone 11 Pro Max • 16B6A8C8-4CDC-4AB6-BBA7-88FAFC3562A3 • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-2 (simulator)

! Doctor found issues in 3 categories.

Other information

Cloud Firestore worked fine with my Flutter development environment. This means GoogleService-Info.plist has been added to XCode correctly. I'm feeling this is specific to Flutter Firebase Analytics.

[suztomo]

Today I tried the tutorial and now it works.

[Easycatchup]

It does not work for me, I tried on Android with emulator as well as on a physical Samsung S-9-XL and did not get the DebugView to show any connected devices. I followed all the guides that I could find online and also tried other flutter sample apps that were supposed to show working FB analytics on flutter but nothing.

[suztomo]

@Easycatchup Try the Firebase Analytics tutorial with Swift using the same Firebase account. In my case it didn’t work either. Therefore the problem was not in this Flutter library, but somewhere in the backend.

[Easycatchup]

@suztomo Were you able to fix it? Sounds like it is somehow linked to the Firebase account or to the Firebase settings?

[suztomo]

Did Swift work?

I just waited few months and the problem was gone. I didn’t fix anything.

[Easycatchup]

I don't have the developer environment for swift setup.
I checked on the Firebase slack channels though and it seems like there's multiple people having the issue in the last days of having nothing show up on the DebugView.

[suztomo]

Then the problem does not seem to related to this Flutter library.