1) add the folder "fonts" inside the folder "assets" and insert the font inside the folder fonts
2) in the layout file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/custom_font"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="मैं छात्र हूँ"
/>
3) In the operation where you want to set the text, use the following code:
TextView txt = (TextView) findViewById(R.id.custom_font);
Typeface font = Typeface.createFromAsset(getAssets(), "hindifont.ttf");
txt.setTypeface(font);
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