How to debug java source code when I implement a custom Detector for Lint?

Question

I am a Android developer. I have already design my own lint rules by implementing new XXXDetector and XXXIssueRegistry, here is my source code snip:

My XXXIssueRegistry

Answer 1

To debug a custom lint check you need to run a Gradle lint task with -Dorg.gradle.debug=true parameter, for example:

./gradlew --no-daemon -Dorg.gradle.debug=true lintDebug

The Gradle will stop execution until a debugger is attached.

Attach a debugger to a local process:

And select a corresponding Java process:

After debugger has been attached, the Gradle will continue execution and you will able to debug your custom lint rule: