Null Pointer Exception ud862-Scroll Events Demo

[FudgedDiceRoll]

Ran code demo verbatim:

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at io.paperplane.techpanda.surfacedesignpractice.MainActivity$1.onBindViewHolder(MainActivity.java:46)
at io.paperplane.techpanda.surfacedesignpractice.MainActivity$1.onBindViewHolder(MainActivity.java:38)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6673)