Android - How to set a custom font for whole app [duplicate]

Answer 1

You could do it like this. Create a custom textview and use that one everywhere

public class MyTextView extends android.widget.TextView
{

    public MyTextView(Context context)
    {
        this(context, null);
    }

    public MyTextView(Context context, AttributeSet attrs)
    {
        this(context, attrs, 0);
    }

    public MyTextView(Context context, AttributeSet attrs, int defStyle)
    {
        super(context, attrs);
        if (this.isInEditMode()) return ;

        final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SomeStyle);
        final String customFont = a.getString(R.styleable.SomeStyle_font);

        //Build a custom typeface-cache here!
        this.setTypeface(
            Typeface.createFromAsset(context.getAssets(), customFont)
        );  
    }
}

Add this to attrs.xml

Then in your theme, do this: This will make sure all the textviews will use the style MyTextView

@style/MyTextView

And now we can define your custom font using your custom attribute in this style.

So whenever you use MyTextView in the project, it will have your custom font.

IMPORTANT: Typefaces are not cached, so if you plan on using this code, you should also build a custom typeface-cache so you can re-use the custom typeface for all textviews. This will significantly speed-up the application!

UPDATE: As Amir was saying, this is almost the same as Custom fonts and XML layouts (Android) but i also use android styling to automatically use it on all textviews in the app.