현재 class에서 다른 Layout 파일에 있는 textview 같은 뷰에 접근할 수 있나요?

Question

안녕하세요.

 

옵션으로 라디오 버튼을 만드는데 선택한 라디오 버튼의 이름을 이전 화면의 textview에 입력하려고 합니다.

그러니까 Framelayout 을 사용하는 A 클래스에서 Addview 로 B라는 클래스를 띄워서 B에 있는 radiobutton 을 클릭하고 돌아갔을때 A의 특정 textview에 B의 해당 라디오버튼의 이름이 입력되게하고 싶은데요

문제는 A와 B가 사용하는 layout이 다르니

B에서

textview = (TextView)findViewById(R.id.radioText);

tx.setText("test");

라고 해봐도 tx.setText("test"); 에서 Nullpointerexception 이 납니다. textview가 다른 layout에 있는 뷰이다보기가 findviewbyid 로 못받아와서 널이 되네요.

이럴때 다른 레이아웃에 있는 뷰를 어떻게 가져올 수 있는지요?

Comments

b의 view.findViewById 로 구해오세요

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같은 액티비티를 쓰는건가요?
다른 액티비티를 쓴다면 startActivityForResult 로 해결할수 있을거 같은데요...

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Answer 1

startActivity로 B로 화면을 넘겼다면 startActivityForResult로 해결하시면 되고,

그게 아니라면 A.this 액티비티 자체를 변수로 가지고 있다가 변수.findViewById 하시면 되죠

혹은 viewHolder 에다가 텍스트뷰를 홀드하세요