每个控制器在方向更改时调用onSavedInstance（）吗？

Question

I have used conductor library to control my views. It was designed in only one orientation now I trying to make it in both.

I have used onSaveInstanceState() to save the state of my views. I found out that every time I change the controller and rotate the screen then onSavedInstance() on both controllers is called which crash my application. How can I save instance of the current controller shown on the screen.

Application Flow A -> B -> C BaseController First Screen A-Controller- Screen Rotated(onSavedInstance() on controller A is called )

Second Screen (Navigate from A) B- Contoller- Screen Rotated(onSavedInstance() on controller A and B is called )

Third Screen (Navigate from B) C- Controller - Screen Rotated(onSavedInstance() on controller A, B and C is called )

I have tried isAttached() to let only the shown controller save the instance but it is somehow only returning false

    protected void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
        if (isAttached()) {}

Answer 1

I found a solution to my problem. I do not know if it is the correct one but it might help. addChangeListner listen the change of controller change events. I created an abstract function in my BaseController which is called when addChange listener is called. I have a boolean which is always true in every controller. But when the controller is changed this abstract function I created is called and change the boolean value to false. Thus only the controller whose screen is attached saves the instance state.

`@Override
    protected void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
        if (isAttached) {
            // State that I want to save 
        }
    }`