Here´s an example using this Technic. In this specifik example the code is making a call to Firebase using a mock MyCompletionListener that is an interface masked as an abstract class, an interface with a constructor
private interface Listener {
void onComplete(databaseError, databaseReference);
}
public abstract class MyCompletionListener implements Listener{
String id;
String name;
public MyCompletionListener(String id, String name) {
this.id = id;
this.name = name;
}
}
private void removeUserPresenceOnCurrentItem() {
mFirebase.removeValue(child("some_key"), new MyCompletionListener(UUID.randomUUID().toString(), "removeUserPresenceOnCurrentItem") {
@Override
public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
}
});
}
}
@Override
public void removeValue(DatabaseReference ref, final MyCompletionListener var1) {
CompletionListener cListener = new CompletionListener() {
@Override
public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
if (var1 != null){
System.out.println("Im back and my id is: " var1.is + " and my name is: " var1.name);
var1.onComplete(databaseError, databaseReference);
}
}
};
ref.removeValue(cListener);
}