How to set custom typeface to items in NavigationView?

just add following class file to your project.

import android.graphics.Paint;import android.graphics.Typeface;import android.text.TextPaint;import android.text.style.TypefaceSpan;public class CustomTypefaceSpan extends TypefaceSpan {    private final Typeface newType;    public CustomTypefaceSpan(String family, Typeface type) {        super(family);        newType = type;    }    @Override    public void updateDrawState(TextPaint ds) {        applyCustomTypeFace(ds, newType);    }    @Override    public void updateMeasureState(TextPaint paint) {        applyCustomTypeFace(paint, newType);    }    private static void applyCustomTypeFace(Paint paint, Typeface tf) {        int oldStyle;        Typeface old = paint.getTypeface();        if (old == null) {            oldStyle = 0;        } else {            oldStyle = old.getStyle();        }        int fake = oldStyle & ~tf.getStyle();        if ((fake & Typeface.BOLD) != 0) {            paint.setFakeBoldText(true);        }        if ((fake & Typeface.ITALIC) != 0) {            paint.setTextSkewX(-0.25f);        }        paint.setTypeface(tf);    }}

then create following method to your activity

private void applyFontToMenuItem(MenuItem mi) {        Typeface font = Typeface.createFromAsset(getAssets(), "ds_digi_b.TTF");        SpannableString mNewTitle = new SpannableString(mi.getTitle());        mNewTitle.setSpan(new CustomTypefaceSpan("" , font), 0 , mNewTitle.length(),  Spannable.SPAN_INCLUSIVE_INCLUSIVE);        mi.setTitle(mNewTitle);}

and call it from activity.

navView = (NavigationView) findViewById(R.id.navView);        Menu m = navView.getMenu();        for (int i=0;i<m.size();i++) {            MenuItem mi = m.getItem(i);            //for aapplying a font to subMenu ...            SubMenu subMenu = mi.getSubMenu();            if (subMenu!=null && subMenu.size() >0 ) {                for (int j=0; j <subMenu.size();j++) {                    MenuItem subMenuItem = subMenu.getItem(j);                    applyFontToMenuItem(subMenuItem);                }            }            //the method we have create in activity            applyFontToMenuItem(mi);        }

and here is my output

this one working for me

<android.support.design.widget.NavigationView       android:id="@+id/navigation_view"       android:layout_width="wrap_content"       android:layout_height="match_parent"       android:layout_gravity="start"       android:background="#4A4444"       android:clipToPadding="false"       android:paddingBottom="50dp"       app:itemIconTint="@color/white"       app:menu="@menu/drawer_home"       app1:itemTextAppearance="@style/NavigationDrawerStyle" ></android.support.design.widget.NavigationView>

res->values->styles

 <style name="NavigationDrawerStyle">    <item name="android:textSize">18sp</item>    <item name="android:typeface">monospace</item></style>

//to Set Custom Typeface MainApplication.java

public class MainApplication extends Application {    @Override    public void onCreate() {        super.onCreate();//set Custom Typeface        FontsOverride.setDefaultFont(this, "MONOSPACE", "OpenSans-Semibold.ttf");    }}

// FontsOverride.java

public final class FontsOverride {     public static void setDefaultFont(Context context,                String staticTypefaceFieldName, String fontAssetName) {            final Typeface regular = Typeface.createFromAsset(context.getAssets(),                    fontAssetName);            replaceFont(staticTypefaceFieldName, regular);        }        protected static void replaceFont(String staticTypefaceFieldName,                final Typeface newTypeface) {            try {                final Field staticField = Typeface.class                        .getDeclaredField(staticTypefaceFieldName);                staticField.setAccessible(true);                staticField.set(null, newTypeface);            } catch (NoSuchFieldException e) {                e.printStackTrace();            } catch (IllegalAccessException e) {                e.printStackTrace();            }        }}

Use the app:itemTextAppearance="" property.Hope this helps.

 <android.support.design.widget.NavigationView        android:id="@+id/nav_view"        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:layout_gravity="start"        android:fitsSystemWindows="true"        app:headerLayout="@layout/nav_header_main"        android:background="@drawable/nav_bg_gradient"        android:theme="@style/NavigationView"        app:itemIconTint="@color/colorWhite"        app:itemTextColor="@color/colorWhite"        app:itemTextAppearance="@style/NavigationText"        app:menu="@menu/main_drawer">

In styles.xml write

<style name="NavigationText" parent="@android:style/TextAppearance.Medium">        <item name="android:textColor">@color/colorWhite</item>        <item name="android:textSize">12sp</item>        <item name="android:fontFamily">sans-serif-thin</item>    </style>