Simple and Custom Fonts

A set of presentable(Displayable and Printable) text characters in a specific size and style is known as Font. Typeface is the type design for a set of fonts, whereas Font Family formed from varieties of that design.
So Helvetica is Typeface Family, Helvetica Italic is a Typeface and Helvetica Oblique Regular or Helvetica Neue 10 is Font. 

Simple Fonts

Android Studio have a default standard fonts, that are utilize by using it XML design as.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:padding="10dp"    android:scrollbars="none">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_margin="10dp"        android:orientation="vertical">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="sans-serif"            android:text="sans-serif"            android:textSize="28sp"            android:textStyle="normal" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="sans-serif"            android:text="sans-serif"            android:textSize="28sp"            android:textStyle="italic" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="sans-serif"            android:text="sans-serif"            android:textSize="28sp"            android:textStyle="bold" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="sans-serif-condensed"            android:text="sans-serif-condensed"            android:textSize="28sp"            android:textStyle="normal" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="sans-serif-condensed"            android:text="sans-serif-condensed"            android:textSize="28sp"            android:textStyle="italic" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="sans-serif-condensed"            android:text="sans-serif-condensed"            android:textSize="28sp"            android:textStyle="bold" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="casual"            android:text="casual"            android:textSize="28sp"            android:textStyle="normal" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="casual"            android:text="casual"            android:textSize="28sp"            android:textStyle="italic" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="casual"            android:text="casual"            android:textSize="28sp"            android:textStyle="bold" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="cursive"            android:text="cursive"            android:textSize="28sp"            android:textStyle="normal" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="cursive"            android:text="cursive"            android:textSize="28sp"            android:textStyle="italic" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="cursive"            android:text="cursive"            android:textSize="28sp"            android:textStyle="bold" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="monospace"            android:text="monospace"            android:textSize="28sp"            android:textStyle="normal" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="monospace"            android:text="monospace"            android:textSize="28sp"            android:textStyle="italic" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="monospace"            android:text="monospace"            android:textSize="28sp"            android:textStyle="bold" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="serif-monospace"            android:text="serif-monospace"            android:textSize="28sp"            android:textStyle="normal" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="serif-monospace"            android:text="serif-monospace"            android:textSize="28sp"            android:textStyle="italic" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:fontFamily="serif-monospace"            android:text="serif-monospace"            android:textSize="28sp"            android:textStyle="bold" />    </LinearLayout> </ScrollView>

Custom Fonts

To use third party Fonts in our application, we need to download it from their site and place it in Asset folder. First you need to create a folder with the names "Asset", and copy the downloaded font to that folder as

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:id="@+id/activity_main"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:orientation="vertical"   android:padding="10dp">   <TextView       android:id="@+id/vibes"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="GreatVibes Regular"       android:textSize="28sp" />   <TextView       android:id="@+id/lobster"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="Lobster"       android:textSize="28sp" />   <TextView       android:id="@+id/lobster_two"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="Lobster Two Regular"       android:textSize="28sp" />   <TextView       android:id="@+id/open_sans"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="Open Snasd Light"       android:textSize="28sp" />   <TextView       android:id="@+id/pacifico"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="Pacifico"       android:textSize="28sp" />   <TextView       android:id="@+id/roboto"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="Roboto Black"       android:textSize="28sp" /> </LinearLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {   TextView greatVibes, lobster, lobsterTwoRegular, openSansLight, pacifico, robotoBlack;   private String GREATEVIBES_REGULAR = "GreatVibes-Regular.otf";   private String LOBSTER = "Lobster_1.3.otf";   private String LOBSTER_REGULAR = "LobsterTwo-Regular.otf";   private String OPENSANS_LIGHT = "OpenSans-Light.ttf";   private String PACIFICO = "Pacifico.ttf";   private String ROBOTO_BLACK = "Roboto-Black.ttf";   @Override   protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       greatVibes = (TextView) findViewById(R.id.vibes);       lobster = (TextView) findViewById(R.id.lobster);       lobsterTwoRegular = (TextView) findViewById(R.id.lobster_two);       openSansLight = (TextView) findViewById(R.id.open_sans);       pacifico = (TextView) findViewById(R.id.pacifico);       robotoBlack = (TextView) findViewById(R.id.roboto);       greatVibes.setTypeface(Typeface.createFromAsset(getAssets(), GREATEVIBES_REGULAR));       lobster.setTypeface(Typeface.createFromAsset(getAssets(), LOBSTER));       lobsterTwoRegular.setTypeface(Typeface.createFromAsset(getAssets(), LOBSTER_REGULAR));       openSansLight.setTypeface(Typeface.createFromAsset(getAssets(), OPENSANS_LIGHT));       pacifico.setTypeface(Typeface.createFromAsset(getAssets(), PACIFICO));       robotoBlack.setTypeface(Typeface.createFromAsset(getAssets(), ROBOTO_BLACK));   } }