Creating "coin":

Mostly in every kind of game, player have to collect some kind of treasure or something similar. In this short article, I will show how to handle "coin" in a easy way.

We don't have to create any extension of the Sprite class, Sprite or AnimatedSprite will be enough, obviously depends on your needs. In this example, I will use only AndEngine effects, that's why I will use Sprite as a my basic coin class, so lets follow this example, below you will find description.

• First step, is to create HUD - follow this article for more info.
• Create new Text, to display our score

Text scoreText = new Text(0, 0, yourFont, "Score:0123456789",
this.getVertexBufferObjectManager());

• Add this new text to the HUD - hud.attach(scoreText);
• Crete new void, to easily change score text:

private void addToScore(int i)
{
    scoredPoints += i;
    scoreText.setText("Score: " + scoredPoints);
}

final Sprite coin = new Sprite(x, y, width, height, coinTextureRegion)
{
      @Override
      protected void onManagedUpdate(final float pSecondsElapsed)
      {
            if (player.collidesWith(this))
            {
                setVisible(false);
                //Play pick up sound here
                addToScore(10);
                setIgnoreUpdate(true);
            }
           super.onManagedUpdate(pSecondsElapsed);
       }
};
 
coin.setCullingEnabled(true);
scene.attachChild(coin);

And that's basically everything, we are simply checking if this coins sprite is colliding with player (our different Entity) if yes, we are setting Sprite invisible, we are changing score, playing sound and setting to ignore further updates. You may also register some ENTITY MODIFIERS to add some visual effects, such as rotation, maybe alpha etc.