If a resource is only defined in folders with qualifiers like
-en, and there is no default declaration in the base folder (
values etc), then the app will crash if that resource is accessed on a device where the device is in a configuration missing the given qualifier.
As a special case, drawables do not have to be specified in the base folder; if there is a match in a density folder (such as
drawable-mdpi) that image will be used and scaled. Note however that if you only specify a drawable in a folder like
drawable-en-hdpi, the app will crash in non-English locales.
There may be scenarios where you have a resource, such as a
-fr drawable, which is only referenced from some other resource with the same qualifiers (such as a
-fr style), which itself has safe fallbacks. However, this still makes it possible for somebody to accidentally reference the drawable and crash, so it is safer to create a default fallback in the base folder. Alternatively, you can suppress the issue by adding
tools:ignore="MissingDefaultResource" on the element.
(This scenario frequently happens with string translations, where you might delete code and the corresponding resources, but forget to delete a translation. There is a dedicated issue id for that scenario, with the id
Issue id: MissingDefaultResource
IntelliJ IDEA 2023.3, Qodana for Android 2023.3, Qodana for JVM 2023.3
Android, 2022.3.1 Beta 2