Param
Params can be used together with Event callbacks i.e. EventHandler. An argument in the event handler annotated with Param will add it in the generated Component. This will allow to pass relevant arguments to the event handler while dispatching events. This is especially useful when event handlers can be reused.
For Example:
@LayoutSpec
class FacePileComponentSpec {
@OnCreateLayout
static Component onCreateLayout(
ComponentContext c,
@Prop Uri[] faces) {
Component.Builder builder = Column.create(c);
for (Uri face : faces) {
builder.child(
FrescoVitoImage2.create(c)
.uri(face)
.clickHandler(FacePileComponent.onFaceClicked(c, face)));
}
return builder.build();
}
@OnEvent(ClickEvent.class)
static void onFaceClicked(
ComponentContext c,
@Param Uri face) {
// Use the param face here
Log.d("FacePileComponent", "Face clicked: " + face);
}
}Content copied to clipboard