How to change data of Main Activity from Fragment [closed]

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I Have fragment 1, fragment 2, fragment 3 which are in the Main Activity. there is a TextView in the main Activity, how can the fragments change the text in the text view?

I already did the casting (Actvity).getActivity but i don't want my app to have error when changing Activities

回答1:

Write a setter method like setTextViewText(String str) in the activity and from fragment call the method like ((YourActivity)getActivity()).setTexrViewText(str)

来源：https://stackoverflow.com/questions/29405335/how-to-change-data-of-main-activity-from-fragment