Efficient way to do static animation with LibGDX?

Question

Doing simple platformer game with LibGDX and Android. For me not a problem to do an animation with sprite sheets but I'm wondering about efficient way to do "static animation for map elements"... for example:

1. stars on the sky

2. moving grass

3. moving trees

Such kind of elements may be a lot on the map and I can define such object layer in my tiled map and inject all those animated elements when game started but in that case when map builded and all elements inserted these animated elements will be animated simultaneously even if they are outside of Game Camera. What the efficient way of doing multiple 2D animations for static map objects?

Answer 1

int frameSize=2; 
TiledMap map;
String tileSetName="stars";
int firstTileId=3,secondTileId=4;

Array<StaticTiledMapTile> frameTiles=new Array<StaticTiledMapTile>(frameSize);
frameTiles.add((StaticTiledMapTile) map.getTileSets().getTileSet(tileSetName).getTile(firstTileId));
frameTiles.add((StaticTiledMapTile) map.getTileSets().getTileSet(tileSetName).getTile(secondTileId));

AnimatedTiledMapTile animatedTile=new AnimatedTiledMapTile(1/2f, frameTiles);

Now AnimatedTile is ready, but not in map. Check if particular cell is in inside screen or with some offset set to particular cell where you want to place your AnimatedTile and when goes offscreen you can remove that tile.

myLayer.getCell(x,y).setTile(animatedTile);