FlutterFirebaseCorePlugin.java uses or overrides a deprecated API

Question

Ok so I run my program without importing firebase core, firebase auth and cloud firestore, and my code runs just fine but I register my app with firebase and it still runs fine but as soon as I import Firebase_auth, Firebase_core and cloud_Firestore... I get the following error

Note: C:\appflutter\flutter\.pub-cache\hosted\pub.dartlang.org\firebase_core-0.7.0\android\src\main\java\io\flutter\plugins\firebase\core\FlutterFirebaseCorePlugin.java uses or overrides a deprecated API. Note: Recompile with -Xlint:deprecation for details. Note: C:\appflutter\flutter\.pub-cache\hosted\pub.dartlang.org\cloud_firestore-0.16.0\android\src\main\java\io\flutter\plugins\firebase\firestore\streamhandler\TransactionStreamHandler.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. D8: Cannot fit requested classes in a single dex file (# methods: 89543 > 65536) com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:  The number of method references in a .dex file cannot exceed 64K. 

Please help me.

Answer 1

I was having the same problem today and I found the solution here on Github

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

Current latest versions are these:

1. firebase_auth: ^0.20.0+1
2. firebase_core: ^0.7.0

Then run these 3 commands in the terminal:

$ flutter pub upgrade  $ flutter pub get  $ flutter clean 

And then run your project

$ flutter run 

This will hopefully help you.