IconUtil.java

import android.content.Context;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.CharacterStyle;
import android.text.style.ImageSpan;
import android.widget.TextView;

import com.mikepenz.iconics.IconicsDrawable;
import com.mikepenz.iconics.typeface.IIcon;

public class IconUtil {

    public static Spanned getIconSpanned(final IIcon icon, final TextView targetTextView) {
        return getIconSpanned(
                icon, (int) targetTextView.getTextSize(), targetTextView.getContext());
    }

    public static Spanned getIconSpanned(final IIcon icon, final int absoluteSize, final Context context) {

        final IconicsDrawable iconDrawable =
                new IconicsDrawable(context, icon).sizePx(absoluteSize);

        final CharacterStyle s = new ImageSpan(iconDrawable);
        final SpannableString ss = new SpannableString("{icon}");
        ss.setSpan(s, 0, ss.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        return ss;
    }
}