android:attr/lStar not found 🤖 Android

AAPT: error: resource android:attr/lStar not found

A dependency (androidx.core 1.7+) uses an attribute from Android 12 (API 31), but your module compiles against an older compileSdk.

Seen on: Android

Meaning

Usually a transitive dependency upgraded androidx.core. Raising compileSdk to 31+ fixes it; forcing an older androidx.core is a workaround.

Common causes

  • compileSdk below 31 with androidx.core 1.7+
  • Plugin/library module compiled with old compileSdk (Flutter/RN plugins)

⚡ Quick fix

  1. Set compileSdk 31+ in all modules
  2. Force compileSdk for subprojects in the root build file
  3. Pin androidx.core to an older version as a last resort

Detailed fix by platform

Gradle

  1. kotlin
    subprojects {
  afterEvaluate {
    extensions.findByName("android")?.let { (it as com.android.build.gradle.BaseExtension).compileSdkVersion(34) }
  }
}

How to diagnose

  1. compileSdk — Of the failing module
  2. Dependency — Which pulls androidx.core?

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