microg/GmsCore · error · UnsupportedOperationException

onInflate not allowed on MapViewDelegate

Error message

onInflate not allowed on MapViewDelegate

What it means

MapViewDelegate.onInflate(Activity, Bundle, Bundle) is intentionally unsupported: XML-attribute inflation is handled when the MapView is constructed or by MapFragment itself. The delegate throws UnsupportedOperationException unconditionally for this method.

Source

Thrown at play-services-maps/src/main/java/org/microg/gms/maps/MapViewDelegate.java:89

            MapsBundleHelper.transfer(bundle, temp);
            delegate.onEnterAmbient(temp);
            MapsBundleHelper.transfer(temp, bundle);
        } catch (RemoteException e) {
            throw new RuntimeRemoteException(e);
        }
    }

    public void onExitAmbient() {
        try {
            delegate.onExitAmbient();
        } catch (RemoteException e) {
            throw new RuntimeRemoteException(e);
        }
    }

    @Override
    public void onInflate(@NonNull Activity activity, @NonNull Bundle options, @Nullable Bundle onInflate) {
        throw new UnsupportedOperationException("onInflate not allowed on MapViewDelegate");
    }

    @Override
    public void onLowMemory() {
        try {
            delegate.onLowMemory();
        } catch (RemoteException e) {
            throw new RuntimeRemoteException(e);
        }
    }

    @Override
    public void onPause() {
        try {
            delegate.onPause();
        } catch (RemoteException e) {
            throw new RuntimeRemoteException(e);
        }

View on GitHub (pinned to 157c9d86ac)

Solutions

1. Do not call onInflate on the delegate; pass XML attributes to the MapView constructor (MapView(Context, AttributeSet)) instead.
2. Use MapFragment/SupportMapFragment for XML-based embedding so inflation is handled for you.
3. Strip onInflate forwarding from custom Fragments wrapping MapView.
4. If you need options, build TileOverlayOptions/GoogleMapOptions programmatically and pass them to the MapView constructor.

Example fix

// before
@Override
public void onInflate(Activity a, Bundle opts, Bundle s) {
    delegate.onInflate(a, opts, s); // always throws
}
// after
@Override
public void onInflate(Activity a, Bundle opts, Bundle s) {
    googleMapOptions = GoogleMapOptions.createFromAttributes(context, attrs);
}

public static boolean supportsInflate(LifecycleDelegate d) {
    return !(d instanceof MapViewDelegate);
}

try {
    delegate.onInflate(activity, options, savedInstanceState);
} catch (UnsupportedOperationException e) {
    // parse XML attributes yourself or use MapView(Context, AttributeSet)
}

When it happens

Trigger: Calling delegate.onInflate(activity, options, savedInstanceState), or a Fragment whose onInflate forwards attributes to the delegate, or inflating the map from XML while manually driving the delegate lifecycle.

Common situations: Developers replicating MapFragment's internal inflation path, XML custom-view setups that forward onInflate, and code ported from other Google Play services delegate implementations.

Understand the failure class

Background: UnsupportedOperationException and "is not supported" errors: when a library deliberately refuses a call — this error's family across 30 libraries.

Related errors

• onCreateView not allowed on MapViewDelegate
• onDestroyView not allowed on MapViewDelegate
• onCreateView not allowed on StreetViewPanoramaViewDelegate
• onDestroyView not allowed on StreetViewPanoramaViewDelegate
• onInflate not allowed on StreetViewPanoramaViewDelegate

AI-assisted analysis of microg/GmsCore@157c9d86ac (2026-09-06). Data as JSON: /api/errors/32a29991b74d52fa. Report an issue: GitHub.