Fixing the AndroidX Build Error After Adding Firebase to Unity

After importing Firebase into Unity, I encountered the following build error:

1
Could not determine the dependencies of task ':launcher:lintVitalRelease'.
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> This project uses AndroidX dependencies, but the 'android.useAndroidX' property is not enabled. Set this property to true in the gradle.properties file and retry.
3
  The following AndroidX dependencies are detected: androidx.fragment:fragment:1.0.0, androidx.slidingpanelayout:slidingpanelayout:1.0.0,

The project depended on AndroidX, but android.useAndroidX had not been enabled.

Enable the Gradle properties template#

Under Build Settings → Player → Publishing Settings, enable Custom Gradle Properties Template. Unity generates the template at Assets/Plugins/Android/gradleTemplate.properties.

Add these two lines:

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android.useAndroidX=true
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android.enableJetifier=true

My resulting properties file looked like this:

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org.gradle.jvmargs=-Xmx**JVM_HEAP_SIZE**M
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org.gradle.parallel=true
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android.enableR8=**MINIFY_WITH_R_EIGHT**
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unityStreamingAssets=**STREAMING_ASSETS**
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android.useAndroidX=true
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android.enableJetifier=true
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**ADDITIONAL_PROPERTIES**

That resolved the problem in this project.

Fixing the AndroidX Build Error After Adding Firebase to Unity

Enable the Gradle properties template#

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