Just do one thing you can change the method which your following now. you can use the "hiero" tool for the font creation . Just download "hiero" jar file from the following link
https://libgdx.badlogicgames.com/tools.html
by using hiero you will be able to access almost all the fonts . after creating the fonts save it on your android project files "asset" folder and add the folowing code.
private BitmapFont font;
font1font = new BitmapFont(Gdx.files.internal("myNewFontCreatedByHiero.fnt"));
just try this method. it will work.