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#CHANGE FONT ON ANDROID STUDIO APP HOW TO#
#CHANGE FONT ON ANDROID STUDIO APP APK#

To create a font family, first add all the fonts to the Resources/font folder. Each font family should have it's own XML file. The font family is defined by font elements in an XML file that is kept in the Resources/font directory. For example, there might be separate font files for bold or italic fonts. When there are many similar font files (for example, the same font with different weights or styles) it is possible to group them into a font family.Ī font family is a set of fonts that have different weights and styles. The build action should be automatically set by the IDE.

The fonts should have a Build Action of AndroidResource or they will not be packaged into the final APK. Fonts resources are kept in a font sub-directory of the Resources folder of the project. OTF file) is added to a Xamarin.Android application just like any other resource, by copying files to a subdirectory in the Resources folder of a Xamarin.Android project.

#CHANGE FONT ON ANDROID STUDIO APP APK#

Packaging a font into an Android APK ensures that it is always available to the application.

#CHANGE FONT ON ANDROID STUDIO APP HOW TO#

This guide will first discuss how to use fonts as an Android resource, and then move on to discuss how to download fonts at runtime. For example, the following snippet demonstrates how to display a font in a TextView: For example, this XML snippet declares a new font family resource that will work in API level 14 and higher: Īs long as fonts are provided to an Android application in a proper way, they can be applied to a UI widget by setting the fontFamily attribute. If only the android: namespace is used, then the fonts will not be displayed devices running API level 25 or less. When targeting the older API levels, it is necessary to declare the app XML namespace and to name the various font attributes using the android: namespace and the app: namespace. The Android Support Library v26 will backport support for fonts to API level 26. This allows developers to specify certain attributes of the font, such as it's weight, and Android will automatically select the appropriate font from the font family. Similar fonts (or a font that may have several different styles) may be grouped into font families. This font can be shared between multiple applications. If necessary, the font will be downloaded and cached on the device. The font provider checks if the font is already on the device.

Download the fonts – Android also supports downloading a font from a font provider.

Package the font as an Android resource – this ensures that the font is always available to the application, but will increase the size of the APK.

The Android Support Library 26 NuGet will backport the new font API's to those apps that target API level 14 or higher.Īfter targeting API 26 or installing the Android Support Library v26, there are two ways to use fonts in an Android application: Set text only once in onCreate() - this must be the first text that should be visible.Beginning with API level 26, the Android SDK allows fonts to be treated as resources, just like a layouts or drawables.

then you set another text - this one will be displayed as soon as your onCreate() method finishes and several other Activity lifecycle methods have been processed!.

you wait for 10 seconds within your onCreate method - this must never be done as it stops all UI activity and will definitely force an ANR (Application Not Responding, see link above!).

you set the text of t (but keep in mind: it will be displayed only after onCreate() finishes and the main event loop of your application runs!).

you pick your layout's TextView in the variable t later.

for no reason you create a new TextView object t!.

What your initialization of your Activity does is: Your onCreate() method has several huge flaws:ġ) onCreate prepares your Activity - so nothing that you do here will be made visible to the user until this method finishes! For example - you will never be able to alter a TextView's text here more than ONE time as only the last change will be drawn and thus visible to the user!Ģ) Keep in mind that an Android program will - by default - run in ONE thread only! Thus: never use Thread.sleep() or Thread.wait() in your main thread which is responsible for your UI! (read "Keep your App Responsive" for further information!)