Using Roboto font in simple steps:
1. Download all roboto fonts in /assets/fonts folder
like /assets/fonts/Roboto-Black.ttf
2. Create fonts.xml file in /res/xml folder with content
<?xml version="1.0" encoding="utf-8"?>
<familyset>
<!-- Font with all four styles defined -->
<family>
<nameset>
<name>roboto</name>
</nameset>
<fileset>
<file>Roboto-Black.ttf</file>
<file>Roboto-BlackItalic.ttf</file>
<file>Roboto-Bold.ttf</file>
<file>Roboto-BoldItalic.ttf</file>
<file>Roboto-Italic.ttf</file>
<file>Roboto-Light.ttf</file>
<file>Roboto-LightItalic.ttf</file>
<file>Roboto-Medium.ttf</file>
<file>Roboto-MediumItalic.ttf</file>
<file>Roboto-Regular.ttf</file>
<file>Roboto-Thin.ttf</file>
<file>Roboto-ThinItalic.ttf</file>
</fileset>
</family>
</familyset>
3. Create attrs.xml file in /res/values with content
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="Fonts">
<attr name="font" format="string" />
<attr name="android:textStyle" />
</declare-styleable>
</resources>
4. Create theme for app in /res/values/styles.xml
<style name="AppBaseTheme" parent="android:Theme.Light">
<!--
Theme customizations available in newer API levels can go in
res/values-vXX/styles.xml, while customizations related to
backward-compatibility can go here.
-->
<item name="font">roboto</item>
</style>
<style name="robotoTextAppearance" parent="@android:style/TextAppearance.Holo">
<item name="font">aspergit</item>
</style>
5. Use
//For whole app
<application
android:name=".KApp"
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppBaseTheme" >
//For individual control
<TextView ... android:textAppearance="@style/robotoTextAppearance"/>
<
Enjoy!!!
