Libgdx clickable object? - libgdx

Question

Can someone explain me how to detect a click on an object? I have already seen an answer to this question but it does not work.
public class TiledMapActor extends Actor {
private TiledMap tiledMap;
private TiledMapTileLayer tiledLayer;
private TiledMapTileLayer.Cell cell;
public TiledMapActor(TiledMap tiledMap, TiledMapTileLayer tiledLayer, TiledMapTileLayer.Cell cell) {
this.tiledMap = tiledMap;
this.tiledLayer = tiledLayer;
this.cell = cell;
}
}
public class TiledMapClickListener extends ClickListener {
private TiledMapActor actor;
public TiledMapClickListener(TiledMapActor actor) {
this.actor = actor;
}
#Override
public void clicked(InputEvent event, float x, float y) {
System.out.println(actor.cell + " has been clicked.");
}
}
public class TiledMapStage extends Stage {
private TiledMap tiledMap;
public TiledMapStage(TiledMap tiledMap) {
this.tiledMap = tiledMap;
for (MapLayer layer : tiledMap.getLayers()) {
TiledMapTileLayer tiledLayer = (TiledMapTileLayer)layer; //THE ERROR IS IN THIS LINE
createActorsForLayer(tiledLayer);
}
}
private void createActorsForLayer(TiledMapTileLayer tiledLayer) {
for (int x = 0; x < tiledLayer.getWidth(); x++) {
for (int y = 0; y < tiledLayer.getHeight(); y++) {
TiledMapTileLayer.Cell cell = tiledLayer.getCell(x, y);
TiledMapActor actor = new TiledMapActor(tiledMap, tiledLayer, cell);
actor.setBounds(x * tiledLayer.getTileWidth(), y * tiledLayer.getTileHeight(), tiledLayer.getTileWidth(),
tiledLayer.getTileHeight());
addActor(actor);
EventListener eventListener = new TiledMapClickListener(actor);
actor.addListener(eventListener);
}
}
}
}
Stage stage = new TiledMapStage(tiledMap);
Gdx.input.setInputProcessor(stage);
I have tried it with this code but I get this error message:
com.badlogic.gdx.maps.MapLayer cannot be cast to com.badlogic.gdx.maps.tiled.TiledMapTileLayer
I do not understand how select which object is clickable

Answer 1

As you already found out, the problem is your casting here:
for (MapLayer layer : tiledMap.getLayers()) {
TiledMapTileLayer tiledLayer = (TiledMapTileLayer)layer;
Looks like the layers are not of type TiledMapTileLayer - or at least not all of them. (Afaik there are also ObjectLayers in a TiledMap) The simplest thing to get your code running again would ab an instanceof check:
for (MapLayer layer : tiledMap.getLayers()) {
if (layer instanceof TiledMapTileLayer) {
TiledMapTileLayer tiledLayer = (TiledMapTileLayer)layer;
createActorsForLayer(tiledLayer);
}