BitmapFont animation in Libgdx scene2d Actor - libgdx

Question

I am trying to animate an actor which contain a simple message written with bitmapfont using fadeIn action but it doesn't work.
Here is my code.
public class Message extends Actor{
BitmapFont font;
String message;
float x, y;
public Message(BitmapFont font, String message, float x, float y) {
this.font = font;
this.message = message;
this.x = x;
this.y = y;
}
#Override
public void draw(Batch batch, float parentAlpha) {
Color color = getColor();
batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
font.setColor(color.r, color.g, color.b, color.a * parentAlpha);
font.draw(batch, message, x, y);
}
}
Then when clicking a button the message should appear but it is only appear without animation.
button.addListener(new ClickListener() {
#Override
public void clicked(InputEvent event, float x, float y) {
BitmapFont font = new BitmapFont(Gdx.files.internal("myfont.font"));
Message message = new Message(font, "Tap Here", 100, 20);
stage.addActor(message);
message.addAction(Actions.fadeIn(5));
}});
Other actors animations on the same stage work fine as I'm calling:
stage.act(delta);
stage.draw();

Answer 1

You should set message actor's alpha to zero before adding the fadeIn action:
button.addListener(new ClickListener() {
#Override
public void clicked(InputEvent event, float x, float y) {
BitmapFont font = new
BitmapFont(Gdx.files.internal("myfont.font"));
Message message = new Message(font, "Tap Here", 100, 20);
message.getColor().a = 0f; // add this line
stage.addActor(message);
message.addAction(Actions.fadeIn(5));
}});