Flutter/Dart - FlutterFirebaseMessagingPlugin.java - Build fails with Exception "error: cannot find symbol"

Question

After upgrading to Null Safety sdk: ">=2.12.0 <3.0.0" I'm getting errors when I try to build my Flutter app in Android Studio.

C:\flutter\.pub-cache\hosted\pub.dartlang.org\firebase_messaging-9.1.4\android\src\main\java\io\flutter\plugins\firebase\messaging\FlutterFirebaseMessagingPlugin.java:20: error: cannot find symbol
    import com.google.firebase.iid.FirebaseInstanceId;
                                  ^
      symbol:   class FirebaseInstanceId
      location: package com.google.firebase.iid
    C:\flutter\.pub-cache\hosted\pub.dartlang.org\firebase_messaging-9.1.4\android\src\main\java\io\flutter\plugins\firebase\messaging\FlutterFirebaseMessagingPlugin.java:21: error: cannot find symbol
    import com.google.firebase.iid.Metadata;
                                  ^
      symbol:   class Metadata
      location: package com.google.firebase.iid
    C:\flutter\.pub-cache\hosted\pub.dartlang.org\firebase_messaging-9.1.4\android\src\main\java\io\flutter\plugins\firebase\messaging\FlutterFirebaseMessagingPlugin.java:152: error: cannot find symbol
                      : Metadata.getDefaultSenderId(FirebaseApp.getInstance());
                        ^
      symbol:   variable Metadata
      location: class FlutterFirebaseMessagingPlugin
    C:\flutter\.pub-cache\hosted\pub.dartlang.org\firebase_messaging-9.1.4\android\src\main\java\io\flutter\plugins\firebase\messaging\FlutterFirebaseMessagingPlugin.java:153: error: cannot find symbol
              FirebaseInstanceId.getInstance().deleteToken(senderId, "*");
              ^
      symbol:   variable FirebaseInstanceId
      location: class FlutterFirebaseMessagingPlugin
    C:\flutter\.pub-cache\hosted\pub.dartlang.org\firebase_messaging-9.1.4\android\src\main\java\io\flutter\plugins\firebase\messaging\FlutterFirebaseMessagingPlugin.java:165: error: cannot find symbol
                      : Metadata.getDefaultSenderId(FirebaseApp.getInstance());
                        ^
      symbol:   variable Metadata
      location: class FlutterFirebaseMessagingPlugin
    C:\flutter\.pub-cache\hosted\pub.dartlang.org\firebase_messaging-9.1.4\android\src\main\java\io\flutter\plugins\firebase\messaging\FlutterFirebaseMessagingPlugin.java:166: error: cannot find symbol
              String token = FirebaseInstanceId.getInstance().getToken(senderId, "*");
                             ^
      symbol:   variable FirebaseInstanceId
      location: class FlutterFirebaseMessagingPlugin

Android Studio tells me FlutterFirebaseMessagingPlugin.java "cannot find symbol". So what does this mean and how do I fix it

I tried to fork & clone the project in order to change the outdated dependencies in pubspec.yaml. But this is my first time and I don't understand why "pub get" is not downloading the plugin into my external libraries folder in my Flutter app. — Meggy
– Meggy, Commented May 21, 2021 at 11:01
The plugin creator/maintainer has just updated the plugin to veriosn 3.05. — Meggy
– Meggy, Commented May 24, 2021 at 7:22

Sn1cKa · Accepted Answer · 2021-05-20 07:52:21Z

41

Update your firebase_messaging in pusbpec.yaml to version that supports null-safety (for example: firebase_messaging: ^10.0.0, and call flutter pub get from terminal

answered May 20, 2021 at 7:52

Sn1cKa

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9 Comments

Meggy Over a year ago

I've using the latest fcm_config: 3.0.4 in pubspec.yaml which must have firebase_messaging-9.1.4 bundled in it. But I have no idea how to upgrade it.

Meggy Over a year ago

When I do a pub outdated I get this as outdated transitive dependencies. But as I said I have no idea how to upgrade it; firebase_messaging *9.1.4 *9.1.4 *9.1.4 10.0.0 firebase_messaging_platform_interface *2.1.4 *2.1.4 *2.1.4 3.0.0 firebase_messaging_web *1.0.7 *1.0.7 *1.0.7 2.0.0

Meggy Over a year ago

I tried forking the original repository and updating the pubspec.yaml to include the new updated firebase but a "pub get" tells me there's no pubspec.yaml

Meggy Over a year ago

Seems cloning the repository leaves me one level up from where the pubspec.yaml exists. Any idea how I can point the entry one level up? Here's the entry; fcm_config: git: url: "github.com/meghead/fcm_config.git"

Sn1cKa Over a year ago

Did you try to override dependency in your project pubspec.yaml?

|

Harshvardhan R · Accepted Answer · 2021-05-23 16:09:30Z

2

First, get the latest versions of your firebase dependencies from pub.dev

Run the commands:

flutter pub upgrade
flutter pub get
flutter clean

Invalidate caches and restart

and then try running the app

answered May 23, 2021 at 16:09

Harshvardhan R

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Bugs Happen · Accepted Answer · 2021-09-07 09:55:50Z

1

For me, the problem was that I updated androidx core version from 1.0.1 to 1.5.0 in my app/gradle file but I didn't update it in project level gradle file in resolutionStrategy

They both should be the same.

answered Sep 7, 2021 at 9:55

Bugs Happen

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