Font resources for different Languages

Question

I'm trying to use font resource directory and use different fonts in xml files in order to use them in preference. I read this thread but I couldn't solve the problem. I'm using support library v27 and I know it supports font in res instead of asset folder. Whenever I change the language of app it only uses just the font which is located in font-fa-rIR folder. I want application uses different fonts for different type of languages respectively. I have attached an image from res directory of application. Where is my problem? How can I solve it? Thank in advance.

preference_button.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="8dp">

    <TextView
        android:id="@android:id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="@font/font_1" />

    <TextView
        android:id="@+id/summary"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="@font/font_1" />

</LinearLayout>

Answer 1

May be This Que Helps You

Ref: Chnaging Locale It self

Locale locale2 = new Locale("fr"); 
Locale.setDefault(locale2);
Configuration config2 = new Configuration();
config2.locale = locale2;
getBaseContext().getResources().updateConfiguration(
    config2, getBaseContext().getResources().getDisplayMetrics());

Font From Res

TextView tv_the = (TextView) findViewById(R.id.the);
Typeface face = Typeface.createFromAsset(getAssets(), "font.ttf");
tv_the.setTypeface(face);

For More Info : How to set custom font in .xml file instead of .java file?