Custom Lint Rules for Android - Detector, Issue, Naming Checks (2026)

Creating custom lint rules in Android enables you to enforce project-specific code standards and patterns. Learn how to implement custom Detectors, define Issues, and perform naming checks. Setting Up a Custom Lint Detector Start by creating a custom Detector class that extends Detector from the lint API: class NamingConventionDetector : Detector () { companion object { val NAMING_ISSUE = Issue . create ( id = "NamingConvention" , briefDescription = "Class name should follow PascalCase" , explanation = "All public classes must follow PascalCase naming convention" , category = Category . CORRECTNESS , priority = 6 , severity = Severity . WARNING ) } override fun getApplicableUastTypes (): List < Class < out UElement >> { return listOf ( UClass :: class . java ) } override fun createUastHandler ( context : UastScannerContext ): UElementHandler { return object : UElementHandler () { override fun visitClass ( node : UClass ) { val className = node . name ?: return if (! className [ 0 ]. is