This sample demonstrates how to use the Downloadable Fonts feature introduced in Android O. Downloadable Fonts is a feature that allows apps to request a certain font from a provider instead of bundling it or downloading it themselves. This means, there is no need to bundle the font as an asset. The parameters ProviderAuthority, ProviderPackage are given by a font provider, in the case above uses Google Play Services as a font provider. The third parameter is a query string about the requested font. The syntax of the query is defined by the font provider.