Android - DialogFragment response to Activity

Example.java

public class MyActivity implements MyDialogFragment.Listener {
	
	// ...

	@Override
    public void onMyEvent() {
        // do something here
    }
}

public class MyDialogFragment extends DialogFragment {

    private Listener mCallback;
    public interface Listener {
        void onMyEvent();
    }

    @SuppressLint("RestrictedApi")
    @Override
    public void setupDialog(final Dialog dialog, int style) {
        super.setupDialog(dialog, style);
        View contentView = View.inflate(getContext(), R.layout.dialog_fragment_custom, null);
        dialog.setContentView(contentView);

        mCallback = (Listener) getActivity();

        Button myBtn = (Button) dialog.findViewById(R.id.btn_custom);
        myBtn.setOnClickListener(v -> {
            mCallback.onDeletedEmoji();
            dismiss();
        });
    }
}