Pros of GmsCore

• Provides Google Play Services functionality without full Google ecosystem
• Smaller footprint and reduced resource usage
• Enhanced privacy and control over data collection

Cons of GmsCore

• May have compatibility issues with some apps requiring full Google Services
• Requires more manual setup and configuration
• Potentially slower updates compared to official Google Play Services

Code Comparison

GmsCore (simplified location services implementation):

public class LocationClientImpl extends ILocationClient.Stub {
    @Override
    public void getLastLocation(ILocationCallback callback) {
        Location location = getLastKnownLocation();
        try {
            callback.onLocationResult(location);
        } catch (RemoteException e) {
            Log.w(TAG, e);
        }
    }
}

LineageOS (part of location services in framework):

public class LocationManagerService extends ILocationManager.Stub {
    @Override
    public Location getLastLocation(String packageName, String featureId) {
        if (!checkLocationAccess(packageName, featureId, Binder.getCallingUid(),
                Binder.getCallingPid(), false)) {
            return null;
        }
        return mLocationHandler.getLastLocation();
    }
}

Both implementations provide location services, but GmsCore's approach is more lightweight and focused on replicating essential Google Play Services functionality.