Could Not Fetch Http Schemas.android.com Apk: Res-auto

When you open an XML layout, Android Studio’s layout editor and XML parser attempt to validate the attributes. To do this, it needs to resolve the res-auto schema. It does actually download a file from the internet. Instead, it uses internal SDK resources. However, due to networking layers, proxies, caches, or misconfigurations, the IDE sometimes treats the URI as a remote resource and attempts an HTTP fetch.

The URL is actually a . In XML, namespaces are used to avoid element name conflicts. When you see xmlns:app="http://schemas.android.com/apk/res-auto" in your root layout element, you are telling the XML parser: "Any attribute starting with app: belongs to the Android resource namespace." could not fetch http schemas.android.com apk res-auto