How to Fix \'Failed to resolve com.google.android.gms:play-services-auth:11.4.0\' Error in Android FirebaseUI Auth?

Resolving "Failed to resolve com.google.android.gms:play-services-auth:11.4.0" Error

Issue:

When attempting to utilize FirebaseUI for Android Auth, developers may encounter the error message "Failed to resolve com.google.android.gms:play-services-auth:11.4.0". This error occurs due to challenges in resolving the dependency.

Resolution:

To resolve this issue, the following steps should be taken:

• Add maven Repository:

  Append the following block to the root level build.gradle file:

  allprojects {
      repositories {
          jcenter()
          maven {
              url "https://maven.google.com"
          }
      }
  }

• Ensure Compatibility:

  Verify that the version numbers of the Firebase and Google Play Services libraries are consistent. For example:

  compile 'com.google.firebase:firebase-database:11.0.4'
  compile 'com.google.firebase:firebase-auth:11.0.4'
  compile 'com.google.android.gms:play-services-auth:11.4.0'

• Upgrade Gradle Plugin (Optional):

  Update the Google Play Services Gradle plugin to the latest version (minimum version: 3.3.1):

  classpath 'com.google.gms:google-services:4.0.1'

• Update Library Versions:

  Upgrade the Firebase and Google Play Services libraries to the most recent versions available.

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