Start a new Flutter project and Connect it to Firebase

It can be tricky to get a new Flutter project to connect to Firebase and work. Version mismatches can be a real killer!

Some of the components have been migrated to a higher version of gradle than the default installation process provides.

Additionally, some of these components (firebase core) have been migrated to AndroidX which means your Android application also needs to use AndroidX.

1. Update Gradle

Update the classpath version in build.gradle

classpath 'com.android.tools.build:gradle:3.4.0'

update the zip gradle-wrapper.properties (it will suggest the latest if you run the project at this step)

gradle-5.1.1-all.zip

2. Convert to AndroidX

Add to gradle.properties

android.useAndroidX=true
android.enableJetifier=true