PdfKmpViewerFileProvider

Dedicated FileProvider subclass declared in the viewer's manifest.

The only reason this class exists is to give the provider a unique android:name so the Android manifest merger does not collapse it into the consumer app's own androidx.core.content.FileProvider declaration. Manifest merger uses android:name as the merge key for <provider> elements, so when both the library and the host app declare a provider named androidx.core.content.FileProvider, the higher-priority host wins and the library's authority + path meta-data are dropped — which then makes FileProvider.getUriForFile(...) throw IllegalArgumentException: Couldn't find meta-data for provider with authority … from the share sheet at runtime.

Subclassing sidesteps the collision entirely: the merge key is now this class's fully qualified name, which no consumer app will ever declare.