SettingsScreen.java

package io.github.some_example_name;

import com.badlogic.gdx.Gdx;

import com.badlogic.gdx.Screen;

import com.badlogic.gdx.graphics.g2d.SpriteBatch;

import com.badlogic.gdx.scenes.scene2d.Actor;

import com.badlogic.gdx.scenes.scene2d.InputEvent;

import com.badlogic.gdx.scenes.scene2d.Stage;

import com.badlogic.gdx.scenes.scene2d.ui.*;

import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener;

import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;

import com.badlogic.gdx.utils.ScreenUtils;

import com.badlogic.gdx.utils.viewport.ScreenViewport;

/**

 * Settings screen allowing the player to adjust game volume.

 */

public class SettingsScreen implements Screen {

    private static float volume = 0.5f; // shared game volume

    private Stage stage;

    private Skin skin;

    private SpriteBatch batch;

    private final MyGame game;

    public SettingsScreen(MyGame game) {

        this.game = game;

    }

    /**

     * Global access to volume level.

     */

    public static float getNoise() {

        return volume;

    }

    /**

     * Sets the global volume level.

     */

    public static void setNoise(float value) {

        volume = value;

    }

    @Override

    public void show() {

        batch = new SpriteBatch();

        stage = new Stage(new ScreenViewport());

        Gdx.input.setInputProcessor(stage);

        skin = new Skin(Gdx.files.internal("uiskin.json"));

        Label titleLabel = new Label("Settings", skin);

        titleLabel.setFontScale(1.5f);

        Label volumeLabel = new Label("Volume", skin);

        Slider volumeSlider = new Slider(0.01f, 1f, 0.01f, false, skin);

        volumeSlider.setValue(volume);

            @Override

            public void changed(ChangeEvent event, Actor actor) {

        });

        TextButton backButton = new TextButton("Back to Menu", skin);

            @Override

            public void clicked(InputEvent event, float x, float y) {

        });

        Table table = new Table();

        table.setFillParent(true);

        table.center();

        table.add(titleLabel).padBottom(40).row();

        table.add(volumeLabel).padBottom(10).row();

        table.add(volumeSlider).width(300).padBottom(30).row();

        table.add(backButton).width(200);

        stage.addActor(table);

    }

    @Override

    public void render(float delta) {

        ScreenUtils.clear(0, 0, 0, 1);

        stage.act(delta);

        stage.draw();

    }

    @Override public void resize(int width, int height) {

        stage.getViewport().update(width, height, true);

    }

    @Override public void pause() {}

    @Override public void resume() {}

    @Override public void hide() {}

    @Override

    public void dispose() {

        stage.dispose();

        skin.dispose();

        batch.dispose();

    }

}

Mutations