How to set custom font in XML file?

In this post, We detail how to set custom font in Android O ( API level 26) and best way of do it.

Right click the res folder and go to New -> Android resource directory. The New Resource Directory window appears and select Font in Resource Type.

Add font files in the Font folder.The folder structure below generates

if we preview the fonts, double-click a font file. Next, we need to create a font family

Creating a font family

Right click the Font folder and go to New -> Font resource file. The New Resource File window appears and enter the File name.

Each font file, style, and weight attribute in the <font> element. The following XML illustrates adding font-related attributes in the font resource XML

	<?xml version="1.0" encoding="utf-8"?>
	<font-family xmlns:android="http://schemas.android.com/apk/res/android">
	<font
	android:fontStyle="normal"
	android:fontWeight="400"
	android:font="@font/proxima_nova" />
	<font
	android:fontStyle="normal"
	android:fontWeight="400"
	android:font="@font/proximanova_bold" />
	</font-family>

view raw

custom_font.xml

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Add Font in Xml file

	<TextView
	android:id="@+id/textfield2"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:fontFamily="@font/proxima_nova" />

view raw

activity_main.xml

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Adding Fonts Programatically
getFont(int) method is used to retrieve the font programatically and provide the resource identifier of the font to retrieve and returns typeface object.
[source language=java]
Typeface typeface = ResourcesCompat.getFont(MainActivity.this,R.font.proxima_nova);
textView.setTypeface(typeface);
[/source]