Gradle mixing versions 27.1.1 and 26.1.0

Question

I'm getting an error in my app-level build.gradle where on the first support library I am using, it tells me that all com.android.support libraries must use the exact same version specification and that it's found versions 27.1.1 and 26.0.2. In my app-level build.gradle, there is no line using 26.1.0. Also, all compile statements have been changed to implementation, the compileSdkVersion is 27 and the targetSdkVersion is 27. To attempt to find the culprit, I ran:

./gradlew -q dependencies app:dependencies --configuration debugAndroidTestCompileClasspath

And got the following output:

registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)
registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)

------------------------------------------------------------
Root project
------------------------------------------------------------

No configurations

------------------------------------------------------------
Project :app
------------------------------------------------------------

debugAndroidTestCompileClasspath - Resolved configuration for compilation for variant: debugAndroidTest
+--- com.android.support.test:runner:1.0.1
|    +--- com.android.support:support-annotations:25.4.0 -> 27.1.1
|    +--- junit:junit:4.12
|    |    \--- org.hamcrest:hamcrest-core:1.3
|    \--- net.sf.kxml:kxml2:2.3.0
+--- com.android.support.test.espresso:espresso-core:3.0.1
|    +--- com.android.support.test:runner:1.0.1 (*)
|    +--- com.android.support.test:rules:1.0.1
|    |    \--- com.android.support.test:runner:1.0.1 (*)
|    +--- com.android.support.test.espresso:espresso-idling-resource:3.0.1
|    +--- com.squareup:javawriter:2.1.1
|    +--- javax.inject:javax.inject:1
|    +--- org.hamcrest:hamcrest-library:1.3
|    |    \--- org.hamcrest:hamcrest-core:1.3
|    +--- org.hamcrest:hamcrest-integration:1.3
|    |    \--- org.hamcrest:hamcrest-library:1.3 (*)
|    \--- com.google.code.findbugs:jsr305:2.0.1
+--- com.android.support:appcompat-v7:27.1.1
|    +--- com.android.support:support-annotations:27.1.1
|    +--- com.android.support:support-core-utils:27.1.1
|    |    +--- com.android.support:support-annotations:27.1.1
|    |    \--- com.android.support:support-compat:27.1.1
|    |         +--- com.android.support:support-annotations:27.1.1
|    |         \--- android.arch.lifecycle:runtime:1.1.0
|    |              +--- android.arch.lifecycle:common:1.1.0
|    |              \--- android.arch.core:common:1.1.0
|    +--- com.android.support:support-fragment:27.1.1
|    |    +--- com.android.support:support-compat:27.1.1 (*)
|    |    +--- com.android.support:support-core-ui:27.1.1
|    |    |    +--- com.android.support:support-annotations:27.1.1
|    |    |    +--- com.android.support:support-compat:27.1.1 (*)
|    |    |    \--- com.android.support:support-core-utils:27.1.1 (*)
|    |    +--- com.android.support:support-core-utils:27.1.1 (*)
|    |    +--- com.android.support:support-annotations:27.1.1
|    |    +--- android.arch.lifecycle:livedata-core:1.1.0
|    |    |    +--- android.arch.lifecycle:common:1.1.0
|    |    |    +--- android.arch.core:common:1.1.0
|    |    |    \--- android.arch.core:runtime:1.1.0
|    |    |         \--- android.arch.core:common:1.1.0
|    |    \--- android.arch.lifecycle:viewmodel:1.1.0
|    +--- com.android.support:support-vector-drawable:27.1.1
|    |    +--- com.android.support:support-annotations:27.1.1
|    |    \--- com.android.support:support-compat:27.1.1 (*)
|    \--- com.android.support:animated-vector-drawable:27.1.1
|         +--- com.android.support:support-vector-drawable:27.1.1 (*)
|         \--- com.android.support:support-core-ui:27.1.1 (*)
+--- com.android.support:design:27.1.1
|    +--- com.android.support:support-v4:27.1.1
|    |    +--- com.android.support:support-compat:27.1.1 (*)
|    |    +--- com.android.support:support-media-compat:27.1.1
|    |    |    +--- com.android.support:support-annotations:27.1.1
|    |    |    \--- com.android.support:support-compat:27.1.1 (*)
|    |    +--- com.android.support:support-core-utils:27.1.1 (*)
|    |    +--- com.android.support:support-core-ui:27.1.1 (*)
|    |    \--- com.android.support:support-fragment:27.1.1 (*)
|    +--- com.android.support:appcompat-v7:27.1.1 (*)
|    +--- com.android.support:recyclerview-v7:27.1.1
|    |    +--- com.android.support:support-annotations:27.1.1
|    |    +--- com.android.support:support-compat:27.1.1 (*)
|    |    \--- com.android.support:support-core-ui:27.1.1 (*)
|    \--- com.android.support:transition:27.1.1
|         +--- com.android.support:support-annotations:27.1.1
|         \--- com.android.support:support-compat:27.1.1 (*)
+--- com.android.support.constraint:constraint-layout:1.1.0
|    \--- com.android.support.constraint:constraint-layout-solver:1.1.0
+--- com.android.support:support-vector-drawable:27.1.1 (*)
+--- com.android.support:support-v4:27.1.1 (*)
+--- com.android.support:cardview-v7:27.1.1
|    \--- com.android.support:support-annotations:27.1.1
+--- com.android.support:recyclerview-v7:27.1.1 (*)
+--- com.google.android.gms:play-services-ads:15.0.0
|    +--- com.android.support:customtabs:26.1.0
|    |    +--- com.android.support:support-compat:26.1.0 -> 27.1.1 (*)
|    |    \--- com.android.support:support-annotations:26.1.0 -> 27.1.1
|    +--- com.google.android.gms:play-services-ads-base:[15.0.0] -> 15.0.0
|    +--- com.google.android.gms:play-services-ads-identifier:[15.0.0,16.0.0) -> 15.0.0
|    |    \--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0
|    |         \--- com.android.support:support-v4:26.1.0 -> 27.1.1 (*)
|    +--- com.google.android.gms:play-services-ads-lite:[15.0.0] -> 15.0.0
|    |    +--- com.google.android.gms:play-services-ads-base:[15.0.0] -> 15.0.0
|    |    \--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|    \--- com.google.android.gms:play-services-gass:[15.0.0] -> 15.0.0
|         +--- com.google.android.gms:play-services-ads-base:[15.0.0] -> 15.0.0
|         \--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
+--- com.google.firebase:firebase-core:15.0.0
|    \--- com.google.firebase:firebase-analytics:[15.0.0,16.0.0) -> 15.0.0
|         +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|         +--- com.google.android.gms:play-services-measurement-base:[15.0.0] -> 15.0.0
|         +--- com.google.android.gms:play-services-stats:[15.0.0,16.0.0) -> 15.0.0
|         |    \--- com.google.android.gms:play-services-basement:[15.0.0] -> 15.0.0 (*)
|         +--- com.google.firebase:firebase-analytics-impl:[15.0.0] -> 15.0.0
|         |    +--- com.google.android.gms:play-services-ads-identifier:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |    +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |    +--- com.google.android.gms:play-services-measurement-base:[15.0.0] -> 15.0.0
|         |    +--- com.google.android.gms:play-services-stats:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |    +--- com.google.android.gms:play-services-tasks:[15.0.0,16.0.0) -> 15.0.0
|         |    |    \--- com.google.android.gms:play-services-basement:[15.0.0] -> 15.0.0 (*)
|         |    +--- com.google.firebase:firebase-common:[15.0.0,16.0.0) -> 15.0.0
|         |    |    +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |    |    \--- com.google.android.gms:play-services-tasks:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |    \--- com.google.firebase:firebase-iid:[15.0.0] -> 15.0.0
|         |         +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |         +--- com.google.android.gms:play-services-measurement-base:[15.0.0] -> 15.0.0
|         |         +--- com.google.android.gms:play-services-stats:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |         +--- com.google.android.gms:play-services-tasks:[15.0.0,16.0.0) -> 15.0.0 (*)
|         |         \--- com.google.firebase:firebase-common:[15.0.0,16.0.0) -> 15.0.0 (*)
|         \--- com.google.firebase:firebase-common:[15.0.0,16.0.0) -> 15.0.0 (*)
+--- com.google.firebase:firebase-database:15.0.0
|    +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.android.gms:play-services-tasks:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.firebase:firebase-common:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.firebase:firebase-database-collection:[15.0.0,16.0.0) -> 15.0.0
|    |    \--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|    \--- com.google.firebase:firebase-database-connection:[15.0.0] -> 15.0.0
|         +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|         +--- com.google.firebase:firebase-analytics:[15.0.0,16.0.0) -> 15.0.0 (*)
|         \--- com.google.firebase:firebase-common:[15.0.0,16.0.0) -> 15.0.0 (*)
+--- com.google.firebase:firebase-firestore:15.0.0
|    +--- com.google.android.gms:play-services-basement:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.android.gms:play-services-tasks:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.firebase:firebase-analytics:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.firebase:firebase-common:[15.0.0,16.0.0) -> 15.0.0 (*)
|    +--- com.google.firebase:firebase-database-collection:[15.0.0,16.0.0) -> 15.0.0 (*)
|    \--- com.squareup.okhttp:okhttp:2.7.2
|         \--- com.squareup.okio:okio:1.6.0
+--- com.aurelhubert:ahbottomnavigation:2.1.0
|    \--- com.android.support:design:25.3.1 -> 27.1.1 (*)
+--- com.github.bumptech.glide:glide:4.5.0
|    +--- com.github.bumptech.glide:gifdecoder:4.5.0
|    |    \--- com.android.support:support-annotations:27.0.2 -> 27.1.1
|    +--- com.github.bumptech.glide:disklrucache:4.5.0
|    +--- com.github.bumptech.glide:annotations:4.5.0
|    \--- com.android.support:support-fragment:27.0.2 -> 27.1.1 (*)
+--- de.hdodenhof:circleimageview:2.2.0
+--- me.tankery.lib:circularSeekBar:1.1.4
+--- com.github.fiskurgit:ChipCloud:3.0.5
|    \--- com.android.support:appcompat-v7:25.1.1 -> 27.1.1 (*)
\--- com.google.android:flexbox:0.3.2

(*) - dependencies omitted (listed previously)

Here it shows that com.android.support:customtabs:26.1.0 in com.google.android.gms:play-services-ads:15.0.0 is using 26.1.0 but in the drilldown it has -> 27.1.1 (*) which I'm assuming means that it's using 27.1.1 instead? I'm getting the same thing from com.android.support:support-v4:26.1.0 in play-services. What could be causing this error?

Answer 1

The line

+--- com.android.support:customtabs:26.1.0

does not have a -> 27.1.1 at the end of it, which means it is not getting automatically upgraded to 27.1.1 (it shows up under the transitive dependencies because those transitive dependencies are being automatically upgraded).

You can force it to use the 27.1.1 version by manually adding that dependency to your build.gradle file:

implementation 'com.android.support:customtabs:27.1.1'

Answer 2

You can search for the mismatching version number (26.1.0) in app.iml file and can add those dependencies in app level build.gradle, forcing to use latest version (27.1.1 in this case)