RecyclerView 에서 널포인트가 발생합니다...

Question

02-25 01:42:02.786: E/AndroidRuntime(18948): java.lang.NullPointerException

02-25 01:42:02.786: E/AndroidRuntime(18948): at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:1764)

02-25 01:42:02.786: E/AndroidRuntime(18948): at android.view.View.measure(View.java:16538)

02-25 01:42:02.786: E/AndroidRuntime(18948): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)

02-25 01:42:02.786: E/AndroidRuntime(18948): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)

02-25 01:42:02.786: E/AndroidRuntime(18948): at android.view.View.measure(View.java:16538)

02-25 01:42:02.786: E/AndroidRuntime(18948): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5140)

02-25 01:42:02.786: E/AndroidRuntime(18948): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)

 

널포인트가 나서  rv = new RecyclerView(this); 로 처리했더니 위에처럼 에러가 뜨는데 무슨이유로 에러가 나는지 잘 모르겠습니다...ㅠ eclipse로 작업중인데 그래서 그런건가요...?

 

Answer 1

원문

 

http://stackoverflow.com/questions/24458538/using-cardview-and-recyclerview-in-my-layout-files-throws-an-exception

 

call recyclerView.setLayoutManager() to get over this.

 

Here is how i solved it..

 

RecyclerView.LayoutManager mLayoutManager;

 

recyclerView = (RecyclerView) view.findViewById(R.id.business_recycler_view);

recyclerView.setHasFixedSize(true);

 

mLayoutManager = new LinearLayoutManager(getActivity());

recyclerView.setLayoutManager(mLayoutManager);

 

This solved my NullPointerException.