Firebase core still relies on android support instead of AndroidX

[kroikie]

Very easy to reproduce. Repro steps:

1. Create a new flutter app flutter create firebase_bug
2. Add firebase_core: ^0.4.0+1 and flutter_webview_plugin: ^0.3.8 to pubspec.yaml
3. Run flutter run for an Android device.

Output from ./gradlew app:dependecies:

+--- org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.71
|    \--- org.jetbrains.kotlin:kotlin-stdlib:1.2.71
|         +--- org.jetbrains.kotlin:kotlin-stdlib-common:1.2.71
|         \--- org.jetbrains:annotations:13.0
+--- project :firebase_core
|    +--- com.google.firebase:firebase-core:16.0.9
|    |    \--- com.google.firebase:firebase-analytics:16.5.0
|    |         +--- com.google.android.gms:play-services-measurement:16.5.0
|    |         |    +--- com.google.android.gms:play-services-basement:16.2.0
|    |         |    |    \--- com.android.support:support-v4:26.1.0
|    |         |    |         +--- com.android.support:support-compat:26.1.0
|    |         |    |         |    +--- com.android.support:support-annotations:26.1.0
|    |         |    |         |    \--- android.arch.lifecycle:runtime:1.0.0
|    |         |    |         |         +--- android.arch.lifecycle:common:1.0.0
|    |         |    |         |         \--- android.arch.core:common:1.0.0
|    |         |    |         +--- com.android.support:support-media-compat:26.1.0
|    |         |    |         |    +--- com.android.support:support-annotations:26.1.0
|    |         |    |         |    \--- com.android.support:support-compat:26.1.0 (*)
|    |         |    |         +--- com.android.support:support-core-utils:26.1.0
|    |         |    |         |    +--- com.android.support:support-annotations:26.1.0
|    |         |    |         |    \--- com.android.support:support-compat:26.1.0 (*)
|    |         |    |         +--- com.android.support:support-core-ui:26.1.0
|    |         |    |         |    +--- com.android.support:support-annotations:26.1.0
|    |         |    |         |    \--- com.android.support:support-compat:26.1.0 (*)
|    |         |    |         \--- com.android.support:support-fragment:26.1.0
|    |         |    |              +--- com.android.support:support-compat:26.1.0 (*)
|    |         |    |              +--- com.android.support:support-core-ui:26.1.0 (*)
|    |         |    |              \--- com.android.support:support-core-utils:26.1.0 (*)
|    |         |    +--- com.google.android.gms:play-services-measurement-base:[16.5.0] -> 16.5.0
|    |         |    |    \--- com.google.android.gms:play-services-basement:16.2.0 (*)
|    |         |    +--- com.google.android.gms:play-services-measurement-impl:[16.5.0] -> 16.5.0
|    |         |    |    +--- com.google.android.gms:play-services-ads-identifier:16.0.0
|    |         |    |    |    \--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         |    |    +--- com.google.android.gms:play-services-basement:16.2.0 (*)
|    |         |    |    +--- com.google.android.gms:play-services-measurement-base:[16.5.0] -> 16.5.0 (*)
|    |         |    |    \--- com.google.android.gms:play-services-stats:16.0.1
|    |         |    |         \--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         |    \--- com.google.android.gms:play-services-stats:16.0.1 (*)
|    |         +--- com.google.android.gms:play-services-measurement-api:16.5.0
|    |         |    +--- com.google.android.gms:play-services-basement:16.2.0 (*)
|    |         |    +--- com.google.android.gms:play-services-measurement-base:[16.5.0] -> 16.5.0 (*)
|    |         |    +--- com.google.android.gms:play-services-measurement-impl:[16.5.0] -> 16.5.0 (*)
|    |         |    +--- com.google.android.gms:play-services-measurement-sdk-api:[16.5.0] -> 16.5.0
|    |         |    |    +--- com.google.android.gms:play-services-basement:16.2.0 (*)
|    |         |    |    \--- com.google.android.gms:play-services-measurement-base:[16.5.0] -> 16.5.0 (*)
|    |         |    +--- com.google.android.gms:play-services-tasks:16.0.1
|    |         |    |    \--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         |    +--- com.google.firebase:firebase-common:16.0.3 -> 16.1.0
|    |         |    |    +--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         |    |    +--- com.google.android.gms:play-services-tasks:16.0.1 (*)
|    |         |    |    \--- com.google.auto.value:auto-value-annotations:1.6
|    |         |    +--- com.google.firebase:firebase-iid:17.1.2
|    |         |    |    +--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         |    |    +--- com.google.android.gms:play-services-stats:16.0.1 (*)
|    |         |    |    +--- com.google.android.gms:play-services-tasks:16.0.1 (*)
|    |         |    |    +--- com.google.firebase:firebase-common:16.1.0 (*)
|    |         |    |    \--- com.google.firebase:firebase-iid-interop:16.0.1
|    |         |    |         +--- com.google.android.gms:play-services-base:16.0.1
|    |         |    |         |    +--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         |    |         |    \--- com.google.android.gms:play-services-tasks:16.0.1 (*)
|    |         |    |         \--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         |    \--- com.google.firebase:firebase-measurement-connector:17.0.1
|    |         |         \--- com.google.android.gms:play-services-basement:16.0.1 -> 16.2.0 (*)
|    |         \--- com.google.android.gms:play-services-measurement-sdk:16.5.0
|    |              +--- com.google.android.gms:play-services-basement:16.2.0 (*)
|    |              +--- com.google.android.gms:play-services-measurement-base:[16.5.0] -> 16.5.0 (*)
|    |              +--- com.google.android.gms:play-services-measurement-impl:[16.5.0] -> 16.5.0 (*)
|    |              \--- com.google.android.gms:play-services-measurement-sdk-api:[16.5.0] -> 16.5.0 (*)
|    \--- com.google.firebase:firebase-common:16.1.0 (*)
+--- project :flutter_webview_plugin
|    \--- androidx.appcompat:appcompat:1.0.0
|         +--- androidx.annotation:annotation:1.0.0
|         +--- androidx.core:core:1.0.0
|         |    +--- androidx.annotation:annotation:1.0.0
|         |    +--- androidx.collection:collection:1.0.0
|         |    |    \--- androidx.annotation:annotation:1.0.0
|         |    +--- androidx.lifecycle:lifecycle-runtime:2.0.0
|         |    |    +--- androidx.lifecycle:lifecycle-common:2.0.0
|         |    |    |    \--- androidx.annotation:annotation:1.0.0
|         |    |    +--- androidx.arch.core:core-common:2.0.0
|         |    |    |    \--- androidx.annotation:annotation:1.0.0
|         |    |    \--- androidx.annotation:annotation:1.0.0
|         |    \--- androidx.versionedparcelable:versionedparcelable:1.0.0
|         |         +--- androidx.annotation:annotation:1.0.0
|         |         \--- androidx.collection:collection:1.0.0 (*)
|         +--- androidx.collection:collection:1.0.0 (*)
|         +--- androidx.cursoradapter:cursoradapter:1.0.0
|         |    \--- androidx.annotation:annotation:1.0.0
|         +--- androidx.legacy:legacy-support-core-utils:1.0.0
|         |    +--- androidx.annotation:annotation:1.0.0
|         |    +--- androidx.core:core:1.0.0 (*)
|         |    +--- androidx.documentfile:documentfile:1.0.0
|         |    |    \--- androidx.annotation:annotation:1.0.0
|         |    +--- androidx.loader:loader:1.0.0
|         |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    +--- androidx.core:core:1.0.0 (*)
|         |    |    +--- androidx.lifecycle:lifecycle-livedata:2.0.0
|         |    |    |    +--- androidx.arch.core:core-runtime:2.0.0
|         |    |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    |    \--- androidx.arch.core:core-common:2.0.0 (*)
|         |    |    |    +--- androidx.lifecycle:lifecycle-livedata-core:2.0.0
|         |    |    |    |    +--- androidx.lifecycle:lifecycle-common:2.0.0 (*)
|         |    |    |    |    +--- androidx.arch.core:core-common:2.0.0 (*)
|         |    |    |    |    \--- androidx.arch.core:core-runtime:2.0.0 (*)
|         |    |    |    \--- androidx.arch.core:core-common:2.0.0 (*)
|         |    |    \--- androidx.lifecycle:lifecycle-viewmodel:2.0.0
|         |    |         \--- androidx.annotation:annotation:1.0.0
|         |    +--- androidx.localbroadcastmanager:localbroadcastmanager:1.0.0
|         |    |    \--- androidx.annotation:annotation:1.0.0
|         |    \--- androidx.print:print:1.0.0
|         |         \--- androidx.annotation:annotation:1.0.0
|         +--- androidx.fragment:fragment:1.0.0
|         |    +--- androidx.core:core:1.0.0 (*)
|         |    +--- androidx.legacy:legacy-support-core-ui:1.0.0
|         |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    +--- androidx.core:core:1.0.0 (*)
|         |    |    +--- androidx.legacy:legacy-support-core-utils:1.0.0 (*)
|         |    |    +--- androidx.customview:customview:1.0.0
|         |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    \--- androidx.core:core:1.0.0 (*)
|         |    |    +--- androidx.viewpager:viewpager:1.0.0
|         |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    +--- androidx.core:core:1.0.0 (*)
|         |    |    |    \--- androidx.customview:customview:1.0.0 (*)
|         |    |    +--- androidx.coordinatorlayout:coordinatorlayout:1.0.0
|         |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    +--- androidx.core:core:1.0.0 (*)
|         |    |    |    \--- androidx.customview:customview:1.0.0 (*)
|         |    |    +--- androidx.drawerlayout:drawerlayout:1.0.0
|         |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    +--- androidx.core:core:1.0.0 (*)
|         |    |    |    \--- androidx.customview:customview:1.0.0 (*)
|         |    |    +--- androidx.slidingpanelayout:slidingpanelayout:1.0.0
|         |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    +--- androidx.core:core:1.0.0 (*)
|         |    |    |    \--- androidx.customview:customview:1.0.0 (*)
|         |    |    +--- androidx.interpolator:interpolator:1.0.0
|         |    |    |    \--- androidx.annotation:annotation:1.0.0
|         |    |    +--- androidx.swiperefreshlayout:swiperefreshlayout:1.0.0
|         |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    +--- androidx.core:core:1.0.0 (*)
|         |    |    |    \--- androidx.interpolator:interpolator:1.0.0 (*)
|         |    |    +--- androidx.asynclayoutinflater:asynclayoutinflater:1.0.0
|         |    |    |    +--- androidx.annotation:annotation:1.0.0
|         |    |    |    \--- androidx.core:core:1.0.0 (*)
|         |    |    \--- androidx.cursoradapter:cursoradapter:1.0.0 (*)
|         |    +--- androidx.legacy:legacy-support-core-utils:1.0.0 (*)
|         |    +--- androidx.annotation:annotation:1.0.0
|         |    +--- androidx.loader:loader:1.0.0 (*)
|         |    \--- androidx.lifecycle:lifecycle-viewmodel:2.0.0 (*)
|         +--- androidx.vectordrawable:vectordrawable:1.0.0
|         |    +--- androidx.annotation:annotation:1.0.0
|         |    \--- androidx.core:core:1.0.0 (*)
|         \--- androidx.vectordrawable:vectordrawable-animated:1.0.0
|              +--- androidx.vectordrawable:vectordrawable:1.0.0 (*)
|              \--- androidx.legacy:legacy-support-core-ui:1.0.0 (*)
\--- junit:junit:4.12
     \--- org.hamcrest:hamcrest-core:1.3

[kroikie]

@calderwoodra

The issue at flutter/flutter#40540 has been closed and moved here. Future collaboration on this issue will be done here.

[Ehesp]

This issue is now resolved - core supports androidx