Cause for NullPointerException android.support.v7.widget.RecyclerView.onMeasure

Question

I am getting following Exception

01-27 11:15:15.756  18348-18348/com.example.pnimje.newswipelistview E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.Nu         


        

Answer 1

These kinds of errors usually originate in not setting the RecyclerView's layout manager. Bein' in a hurry myself I forgot to set one which ended in the following error:

java.lang.NullPointerException
        at android.support.v7.widget.RecyclerView.onInterceptTouchEvent(RecyclerView.java:1636)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1820)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2177)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1878)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2177)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1878)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2177)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1878)

The following line should resolve it:

mRecyclerView.setLayoutManager(new LinearLayoutManager((Activity)this));