IssueTracker

There is an endless loop error in the Android Lint plugin (tested with AGP 4.0.1 and AGP 4.1.2) that prevents Lint from parsing the following databinding expression e.g. for the UnusedResources rule:

@{SomeEnum.NOMER.isEditable(viewmodel.fieldIsEditable)}

The culprit is that in the NOMER. part the Lint plugin recognizes an R. expression at first and figures that it's not actually a valid one:

https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-master-dev:sdk-common/src/main/java/com/android/ide/common/resources/usage/ResourceUsageModel.java;l=827;bpv=0

The while returns again in value.indexOf("R.", resourceStartIndex), but resourceStartIndex isn't incremented, so it finds the same instance again.

A proper fix could be to increment that index here:

if (Character.isJavaIdentifierPart(
        value.charAt(resourceStartIndex - 1))) {
    resourceStartIndex += 2;
    continue;
}