Libgdx Actor Scened2d Draw method does not draw nothing - libgdx

Question

I've started a very small Libgdx project based in Scene2d. I downloaed last version of LGDX. I have tried to find some imformation but nothing clear.
The problem is that I only get a Black Screen of the Death. Nothing happens
I have followed the code, with logs and I'm sure I arrive to Draw method in my Actor with no results:
Thank you in advance.
public class ActorBall extends Actor implements Disposable {
private Texture ballTexture;
private TextureRegion ballTextureRegion;
public ActorBall() {
bolaTexture = new Texture("redball.png");
ballTextureRegion = new TextureRegion(ballTexture, 300,300);
setSize(300,300);
}
#Override
public void dispose(){
bolaTexture.dispose();
}
#Override
public void draw(Batch batch, float parentAlpha) {
Color col = getColor();
batch.setColor(col.r,col.g, col.b,col.a * parentAlpha);
Gdx.app.log("App","where are you");
batch.draw(ballTextureRegion,getX(),getY(),getOriginX(),
getOriginY(),getWidth(), getHeight(), getScaleX(), getScaleY(),getRotation());
}
#Override
public void act(float delta) {
super.act(delta);
}
}
My screen class extended from Screen:
public class scene extends scenebase {
private final OrthographicCamera camera;
private MyGdxGame game ;
private Stage stage; // los Stages son inputprocessors
private ActorBall ball;
public scene(MyGdxGame game) {
super(game);
this.game = game;
camera = new OrthographicCamera();
camera.setToOrtho(false, 800, 480);
stage = new Stage(new ScreenViewport());
ball = new ActorBall();
ball.setPosition(0,0);
stage.addActor(ball);
}
#Override
public void render(float delta) {
// super.render(delta);
Gdx.gl.glClearColor(0,0,0.0f,1);
Gdx.gl.glClear (GL20.GL_COLOR_BUFFER_BIT);
camera.update();
// game.batch.setProjectionMatrix(camera.combined);
stage.draw();
stage.act();
}
#Override
public void resize(int width, int height) {
stage.getViewport().update (width,height);
}
}
And last my main game:
public class MyGdxGame extends Game {
private AssetManager manager;
private scene screenscene;
#Override
public void create() {
manager = new AssetManager();
manager.load("redball.png", Texture.class);
manager.finishLoading();
// Enter the loading screen to load the assets.
screenscene = new scene(this);
setScreen(screenscene);
}
#Override
public void render () {
super.render(); // This is very important!!!!!!!!
Gdx.gl.glClearColor(0, 0, 0.1f, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
}
public AssetManager getManager() {
return this.manager;
}
}

Answer 1

#Override
public void render () {
super.render(); // This is very important!!!!!!!!
Gdx.gl.glClearColor(0, 0, 0.1f, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
}
What this does is first render everything and then clear the screen. You need to first clear it and then render.