Flutter Projects & Android X Migration Issues

I've made the migration successfully by using Sam's answer!

1. Open the Flutter project into Android Studio
2. Right click on the android directory and Flutter -> Open Android module in Android Studio. It asked me to upgrade my gradle plugin.
3. Then I installed Google Play Services. Tools -> SDK Manager -> SDK Tools and chek the Goolge Play Services.

As you are creating a new project, just follow @harsh 's answer and you're done.

However, as I recently upgraded my existing app to use new plugins, I had to migrate to AndroidX as well... and the default procedure in the official instructions didn't work, which is using Android Studio to migrate the project - it said "No usages found!".

So what I did was:

1. updated Android Studio to 3.3
2. tried menu Refactor > Migrate to AndroidX
3. got "No usages found" (if you manage to do it here instead, stop! you're done! ... actually, you can give this answer a try before continuing)
4. opened android/gradle.properties and added

android.useAndroidX=true
android.enableJetifier=true

5. opened android/build.gradle and changed

   • com.android.tools.build:gradle to version 3.3.0
   • com.google.gms:google-services to version 4.2.0

6. opened android/app/build.gradle and

   • changed compileSdkVersion to 28
   • replaced android.support.test.runner.AndroidJUnitRunner to androidx.test.runner.AndroidJUnitRunner
   • replaced com.android.support.test:runner to androidx.test:runner:1.1.0
   • replaced com.android.support.test.espresso:espresso-core to androidx.test.espresso:espresso-core:3.1.0
   • in my case that was it, but here's the complete list of required replacements

7. opened android/gradle/wrapper/gradle-wrapper.properties and changed distributionUrl to https\://services.gradle.org/distributions/gradle-4.10.2-all.zip (you might have to use 5.4.1, please see update below)

8. executed flutter clean

And contrary to what I expected, IT WORKED! :)

UPDATE (2019 October 27th)

When updating my app to flutter v1.9.1+hotfix.5, as I use app signing, I was stuck with the error SigningConfig "release" is missing required property "storePassword" and in the end it was the gradle version from step 7 above. So now I'm using 5.4.1 as suggested in this wiki.

[android/gradle/wrapper/gradle-wrapper.properties]

distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip