Box2D draw Animations

// in show method:
Sprite sprite = new Sprite(animation.getKeyFrame(0)); // creates it with the first frame, not important
sprite.setSize(shape.getRadius() * 2, shape.getRadius() * 2); // set the size to the shape size (it's a CircleShape, don't just use the radius for other shapes!)
sprite.setOrigin(sprite.getWidth() / 2, sprite.getHeight() / 2); // recalculate the origin

ballBody.setUserData(new Object[] {sprite, animation}); // not really the best way to store the things. better make a class for them

// in render method:
animationTime += delta; // accumulate animation state time

batch.begin();
for(Body body : tmpBodies)
    if(body.getUserData() instanceof Object[]) {
        // get the Sprite and Animation from the Object array
        Sprite sprite = (Sprite) ((Object[]) body.getUserData())[0];
        Animation animation = (Animation) ((Object[]) body.getUserData())[1];

        sprite.setPosition(body.getPosition().x - sprite.getWidth() / 2, body.getPosition().y - sprite.getHeight() / 2);
        sprite.setRotation(body.getAngle() * MathUtils.radDeg);

        sprite.setRegion(animation.getKeyFrame(animationTime)); // update the sprite's region with the frame from the animation (does not influence position or size)

        sprite.draw(batch);
    }
batch.end();