Android 8.0 (API level 26) and Android Support Library 26 introduce supportfor APIs to request fonts from a provider application instead of bundlingfiles into the APK or letting the APK download fonts. The feature isavailable on devices running Android API versions 14 and higher through theSupport Library 26.The Downloadable Fonts feature offers the following benefits:. Reduces the APK size. Increases the app installation success rate. Improves the overall system health as multiple APKs can share the samefont through a provider. This saves users cellular data, phone memory,and disk space. In this model, the font is fetched over the network whenneeded.Refer to the following related resources:.Downloadable Fonts sample app How does Downloadable Fonts work?A font provider is an application that retrieves fonts and caches themlocally so other apps can request and share fonts.

Figure 1 illustrates theprocess.Figure 1. Downloadable Fonts process The basicsYou can use the Downloadable Fonts feature in the following ways:.Using Downloadable Fonts via Android Studio and Google Play servicesYou can set your application to download fonts by using Android Studio 3.0 or higher.To help you get started with the Downloadable Fonts features, you can usethe font provider from Google Play services.Note: A device must have Google Play services version11 or higher to use the Google Fonts provider. In the Layout Editor, select a TextView, and then underProperties, select fontFamily  More Fonts.Figure 2. Using Layout editorThe Resources window appears. In the Source drop-down list, select Google Fonts.

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In the Fonts box, select a font. Select Create downloadable font and click OK.Note: To bundle the font in your app, selectAdd font to project.

Figure 3.Selecting font from the Resources windowAndroid Studio automatically generates the relevant XML files that areneeded to render the font correctly in your app. Previewing font file Using Downloadable Fonts programmaticallyPrior to Android 8.0 (API level 26), the Support Library 26.0 providesfull support for Downloadable Fonts. For more information about using thesupport library, go to the Downloadable Fonts support library section.To use the Downloadable Fonts feature programmatically, you need to interactwith two key classes:. android.graphics.fonts.FontRequest: This class lets youcreate a font request.: This class lets youcreate a new object based on the fontrequest.Your app retrieves fonts from the font provider by using theAPI. Each provider has its own set ofrestrictions on the Android versions and query language it supports.

Formore information on the Android versions and query format, refer to yourprovider’s documentation.To download a font, perform the following steps:. Create an instance of the android.graphics.fonts.FontRequestclass to request the font from the provider.

To create a request, pass thefollowing parameters:. English accents and dialects hughes trudgill pdf writer. The font provider authority. The font provider package to verify the identity of the provider. The string query of the font. For more information about queryformats, see your font provider's documentation, such as. A list of sets of hashes for the certificates to verify the identityof the provider.Note: There is no need to add a certificate ifyou request fonts from pre-installed providers.

However, you mustalways provide a certificate if you request fonts through thesupport library. Kotlinval request = FontRequest('com.example.fontprovider.authority','com.example.fontprovider','my font',certs)JavaFontRequest request = new FontRequest('com.example.fontprovider','com.example.fontprovider', 'my font', certs);Note: You can receive the parameter values fromyour font provider. Android Studio automatically populates these valuesfor the providers it supports in its UI. Create an instance of theclass. Override themethod to indicate the font request is complete. Provide the retrievedfont as the parameter.

You can use this method to set the font, as needed.For example, you can set the font on a. Override themethod to receive information about errors in the font request process.For more information about error codes, refer to the. Call the FontsContract.requestFontmethod to retrieve the font from the font provider.

The method initiates acheck to determine if the font exists in the cache. If the font is notavailable locally, it calls the font provider, retrieves the fontasynchronously, and passes the result to the callback. Pass the followingparameters:. an instance of the class. an instance of the android.graphics.fonts.FontRequest class. a callback to receive the results of the font request. a handler to fetch fonts on a threadNote: Ensure this handler is not the UserInterface thread handler.The following sample code illustrates the overall Downloadable Fontsprocess.