At the game I choose StopScreen. At this screen displays button. But if I click it - it doesn't work.

What I expect - when I press button it must restart game. At this stage must display at least a message that the button is pressed.

I tried to create new and clear project. Main class implement ApplicationListener. I put the same code in the appropriate methods. And it's works!

But if i create this button in my game - it doesn't work. When i play and go to the StopScreen, i saw button. But if i click, or touch, nothing happens.

I think that the proplem at the InputListener, although i set the stage as InputProcessor.

    Gdx.input.setInputProcessor(stage); 

I also try to addListener for Button as ClickListener. But it gave no results.

Or it maybe problem that i implements Screen method - not ApplicationListener or Game. But if StopScreen implement ApplicationListener, at the mainGame I can't to setScreen.

Just interests question: why button displays but nothing happens to it?

Here is the code of StopScreen if it helps find my mistake:

public class StopScreen implements Screen{

private OrthographicCamera camera;
private SpriteBatch batch;
public Stage stage; //** stage holds the Button **//
private BitmapFont font; //** same as that used in Tut 7 **//
private TextureAtlas buttonsAtlas; //** image of buttons **//
private Skin buttonSkin; //** images are used as skins of the button **//
public TextButton button; //** the button - the only actor in program **//



public StopScreen(CurrusGame currusGame) {
    camera = new OrthographicCamera();
    camera.setToOrtho(false, 800, 480);

    batch = new SpriteBatch();

    buttonsAtlas = new TextureAtlas("button.pack"); //** button atlas image **//
    buttonSkin = new Skin();
    buttonSkin.addRegions(buttonsAtlas); //** skins for on and off **//
    font = AssetLoader.font; //** font **//

    stage = new Stage();       
    stage.clear();
    Gdx.input.setInputProcessor(stage); 

    TextButton.TextButtonStyle style = new TextButton.TextButtonStyle(); 
    style.up = buttonSkin.getDrawable("ButtonOff");
    style.down = buttonSkin.getDrawable("ButtonOn");
    style.font = font;

    button = new TextButton("PRESS ME", style); //** Button text and style **//
    button.setPosition(100, 100); //** Button location **//
    button.setHeight(100); //** Button Height **//
    button.setWidth(100); //** Button Width **//


    button.addListener(new InputListener() {
        public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
            Gdx.app.log("my app", "Pressed"); 
            return true;
        }

        public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
            Gdx.app.log("my app", "Released");
        }
    });
    stage.addActor(button);
}




@Override
public void render(float delta) {
    Gdx.gl.glClearColor(0, 1, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    stage.act();

    batch.setProjectionMatrix(camera.combined);
    batch.begin();
    stage.draw();
    batch.end();

}