Scheduling a task with intervals-LibGdx - libgdx

Question

I want to implement falling leaves in my game in particular intervals.
After 10 seconds of game starts,leaves has to fall.Then again leaves has to fall after 20 seconds and so on.
I have this method for the falling leaves of array;
private void updateFalls(float delta) {
for (Leaf l : leaves) {
l.moveLeavesDown(delta);
}
spawnleaves();
}
Is it possible to do with timer class?Is it possible to call this method inside timer with fixed intervals?
Any help would be appreciated.

Answer 1

You can use Timer in this way :
Timer timer=new Timer();
timer.scheduleTask(new Timer.Task() {
#Override
public void run() {
spawnLeaf();
}
},10,20); // --> 10 is your first delay and 20 is interval in sec.
I'm considering Leaf as a Sprite but it may be an Image or any other Entity.
Here is my spawnLeaf method :
Array<Sprite> leaves=new Array<Sprite>();
private void spawnLeaf(){
Sprite sprite=new Sprite(texture);
sprite.setPosition(MathUtils.random(Gdx.graphics.getWidth()),Gdx.graphics.getHeight());
leaves.add(sprite);
}
Draw and position update part of all leaves
spriteBatch.begin();
Iterator<Sprite> iter = leaves.iterator();
while (iter.hasNext()) {
Sprite spr = iter.next();
spr.draw(spriteBatch);
spr.setY(spr.getY()-50f*Gdx.graphics.getDeltaTime());
if (spr.getY()<0) {
iter.remove();
}
}
spriteBatch.end();
Timer has clear() and stop() method that help in removing all scheduled tasks and stops the timer respectively that may start again.