Accessing a font under assets folder from XML file in Android

Question

I am trying to do a application-wide font change and creating a style file to do so. In this file (below) I just want to change typeface value of TextAppearance style of And

Answer 1

Instead of assets folder, you can put the .ttf file on fonts folder. To use fonts support in XML feature on devices running Android 4.1 (API level 16) and higher, use the Support Library 26+. Right click res folder, new -> Android resource directory-> select font -> Ok. put your "myfont.ttf" file in newly created font folder.

On res/values/styles.xml add,

<style name="customfontstyle" parent="@android:style/TextAppearance.Small">
<item name="android:fontFamily">@font/myfont</item>
</style>

On layout file add android:textAppearance="@style/customfontstyle",

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="@style/customfontstyle"/>

Refer : https://developer.android.com/guide/topics/ui/look-and-feel/fonts-in-xml

Answer 2

Uses this function if you are using single font.

public static void applyFont(final Context context, final View root, final String fontName) {
        try {
            if (root instanceof ViewGroup) {
                ViewGroup viewGroup = (ViewGroup) root;
                for (int i = 0; i < viewGroup.getChildCount(); i++)
                    applyFont(context, viewGroup.getChildAt(i), fontName);
            } else if (root instanceof TextView)
                ((TextView) root).setTypeface(Typeface.createFromAsset(context.getAssets(), fontName));
        } catch (Exception e) {
            Log.e("ProjectName", String.format("Error occured when trying to apply %s font for %s view", fontName, root));
            e.printStackTrace();
        }
    }