如何从另一个 Fragment 调用一个 Fragment 的方法？

Question

How can I call a method of a Fragment from a DialogFragment, knowing that TargetFragment is now deprecated ?

In the past, I could do it this way:

ParentFragment

DialogFragment dialog = new DialogFragment();
dialog.setTargetFragment(this, 0);
dialog.show(this.getSupportFragmentManager(), "tag");

DialogFragment

((ParentFragment) this.getTargetFragment()).myMethod();

This is no longer possible, because TargetFragment is now deprecated.

I read that I can use setFragmentResultListener() to pass variables, but how can I call the ParentFragment.myMethod() method from the DialogFragment?

Answer 1

Here is the solution I found.

ParentFragment

public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.getParentFragmentManager().setFragmentResultListener("result", this, new FragmentResultListener() {
        public void onFragmentResult(@NonNull String requestKey, @NonNull Bundle bundle) {
            String action = bundle.getString("action");
            if (action != null)
                if (action.equals("myMethod"))
                    ParentFragment.this.myMethod();
        }
    });
}

DialogFragment

Bundle result = new Bundle();
result.putString("action", "myMethod");
this.getParentFragmentManager().setFragmentResult("result", result);