Argument 'getContext()' might be null

 https://developer.android.com/guide/components/fragments.html?hl=ko#java

 

프래그먼트  |  Android 개발자  |  Android Developers

A Fragment represents a behavior or a portion of user interface in an Activity. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities. You can think of a fragment as a modular section…

developer.android.com

Fragment 생명주기에 보면, 다음과 같이 주의사항이 표시.

따라서 안전하게 

다음과 같이 onAttach에서 context 와 activity를 복사해두자.

    @Override
    public void onAttach(Context context) {
        mContext = context;
        if (context instanceof Activity) {
            mActivity = (Activity)context;
        }
        super.onAttach(context);
    }
    
    
    // detach에서는 변수 clearing 해주기 leak방지
    @Override
    public void onDetach() {
        mActivity = null;
        mContext = null;
        super.onDetach();
    }

 

출처: https://ciwhiz.tistory.com/282 [ciwhiz's garret]