Change text size of Textbutton in LibGDX

Question

I am new to Libgdx and I have been searching for 3 hours to find a way to change text size in text button but I couldn't find any method for this. What should I do to do this.

 Table rootTable = new Table();
 rootTable.setFillParent(true);
 rootTable.setDebug(true, true);
 Table menuTable = new Table();
 rootTable.add(menuTable).expand().center().right();
 Skin skin = new Skin(Gdx.files.internal("data/uiskin.json"));
 TextButton singlePlayer = new TextButton("Single Player",skin);
 TextButton multiPlayer = new TextButton("Multi Player", skin);
 TextButton options = new TextButton("Options", skin);
 TextButton exit = new TextButton("Exit", skin);
 int x = Gdx.graphics.getHeight();
 int unit = x / 6;
 float scale = unit / singlePlayer.getHeight();
 float width = singlePlayer.getWidth() * scale;
 menuTable.add( singlePlayer ).size( width,unit).right().row();
 menuTable.add( multiPlayer ).size( width,unit).right().row();
 menuTable.add( options ).size( width,unit).right().row();
 menuTable.add( exit ).size( width,unit).right().row();

Answer 1

Use textButton.getLabel().setFontScale(x, y).

• Arda Kara: It worked but it looks really bad and blurry :/ isn't there anyway to change size instead of scaling?
• Tenfour04: Size and scaling are effectively the same thing when it gets to the screen. You need to start with a higher resolution font texture. And make sure the texture is loaded with mip-mapping on (and use texture filters MipMapLinearLinear, Linear).
• David Saltares: You will need to use a bigger BitmapFont and update the skin JSON file accordingly.
• Mofe Ejegi: Use a bigger BitmapFont, then assume a high density device. Then work out a formula to scale down the font on lower density devices using Gdx.graphics.getDensity()

Answer 2

Use FreeTypeFontGenerator to set a font and then Update the button:

private void UpdateButton(float xf, float width, float height) {
 if (xf > grayButton.getX() + grayButton.getWidth() / 2) {
 width += 20;
 height += 20;
 } else {
 width -= 20;
 height -= 20;
 }
 params.size = (int) ((int) width / 4.0);
 fontB = generator.generateFont(params);
 grayButtonStyle.font = fontB;
 grayButton.remove();
 grayButton = new TextButton("abcABC", grayButtonStyle);
 grayButton.setSize(width, height);
 grayButton.setPosition((screenWidth - width) / 2, (screenHeight - height) / 2);
 grayButton.addListener(new ClickListener() {
 @Override
 public void clicked(InputEvent event, float x, float y) {
 UpdateButton(Gdx.input.getX(), grayButton.getWidth(), grayButton.getHeight());
 }
 });
 stage.addActor(grayButton);
}

• Arda Kara: Isn't it slow to generate fonts on the go? Also can you explain what does UpdateButton function do? So I can mark your answer as accepted.