How to set a custom font to the title in toolbar android

Since android.support.v7.appcompat 24.2 Toolbar has method setTitleTextAppearance and you can set its font without external textview.

create new style in styles.xml

<style name="RobotoBoldTextAppearance">        <item name="android:fontFamily">@font/roboto_condensed_bold</item></style>

and use it

mToolbar.setTitleTextAppearance(this, R.style.RobotoBoldTextAppearance);

Update 2018 (kotlin version)

fun Toolbar.changeToolbarFont(){    for (i in 0 until childCount) {        val view = getChildAt(i)        if (view is TextView && view.text == title) {            view.typeface = Typeface.createFromAsset(view.context.assets, "fonts/customFont")            break        }    }}

and use it like that toolBar.changeToolbarFont()

old-post

To use a custom title in your Toolbar all you need to do is remember is that Toolbar is just a fancy ViewGroup so you can add a custom title like so:

<android.support.v7.widget.Toolbar    android:id="@+id/toolbar_top"    android:layout_height="wrap_content"    android:layout_width="match_parent"    android:minHeight="?attr/actionBarSize"    android:background="@color/action_bar_bkgnd"    app:theme="@style/ToolBarTheme" >     <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Toolbar Title"        android:layout_gravity="center"        android:id="@+id/toolbar_title" />    </android.support.v7.widget.Toolbar>

This means that you can style the TextView however you would like because it's just a regular TextView. So in your activity you can access the title like so:

Toolbar toolbarTop = (Toolbar) findViewById(R.id.toolbar_top);TextView mTitle = (TextView) toolbarTop.findViewById(R.id.toolbar_title);

And then:

Typeface khandBold = Typeface.createFromAsset(BalrogApplication.getApplication().getAssets(), "fonts/Khand-bold.ttf");mTitle.setTypeface(khandBold);

UPDATE dynamically version

public static void changeToolbarFont(Toolbar toolbar, Activity context) {    for (int i = 0; i < toolbar.getChildCount(); i++) {        View view = toolbar.getChildAt(i);        if (view instanceof TextView) {            TextView tv = (TextView) view;            if (tv.getText().equals(toolbar.getTitle())) {                applyFont(tv, context);                break;            }        }    }}public static void applyFont(TextView tv, Activity context) {    tv.setTypeface(Typeface.createFromAsset(context.getAssets(), "fonts/customFont"));}

and use it like that

changeToolbarFont(findViewById(R.id.app_bar), this);

I still wanted to use the Toolbars title methods (nor did I want to have a custom Toolbar class), so adding in the custom TextView inside of the Toolbar xml element didn't work for me. Instead, I used the following method to find the TextView:

public static void applyFontForToolbarTitle(Activity context){    Toolbar toolbar = (Toolbar) context.findViewById(R.id.app_bar);    for(int i = 0; i < toolbar.getChildCount(); i++){        View view = toolbar.getChildAt(i);        if(view instanceof TextView){            TextView tv = (TextView) view;            Typeface titleFont = Typeface.               createFromAsset(context.getAssets(), "fonts/customFont");            if(tv.getText().equals(toolbar.getTitle())){                tv.setTypeface(titleFont);                break;            }        }    }}