Software⏱️ 2 min read📅 2026-05-31

How to Fix: Failed to resolve variable '${animal.sniffer.version}' when migrate to AndroidX

Learn how to fix: Failed to resolve variable '${animal.sniffer.version}' when migrate to AndroidX.

Quick Answer: Try checking your system settings or restarting.

📋 Table of Contents

  1. 🔧 Proven Troubleshooting Steps
  2. ✨ Wrapping Up

The issue you're experiencing is due to the fact that AndroidX uses a different versioning system than the old Android Support Library. When you migrate your project, the compiler is unable to resolve the variable '${animal.sniffer.version}' because it's looking for an older version of the library.

🔧 Proven Troubleshooting Steps

Method 1: Update Android Gradle Plugin

  1. Step 1: Open your build.gradle file and update the compileSdkVersion to the latest version available.

Method 2: Update Dependency Versions

  1. Step 1: Open your build.gradle file and update the versions of the AndroidX dependencies to their latest versions.

Method 3: Use the Jetifier Plugin

  1. Step 1: Add the following configuration to your build.gradle file:
apply plugin: 'com.android.application'android.useAndroidX = trueandroid.enableJetifier = true

✨ Wrapping Up

By following these steps, you should be able to resolve the variable '${animal.sniffer.version}' and successfully migrate your project to AndroidX.

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