text: <?xml version="1.0" encoding="utf-8"?>
  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/activity_normal_common_adapter"
      android:layout_width="match_parent"
      android:layout_height="match_parent">
  
      <android.support.v7.widget.RecyclerView
          android:id="@+id/recycler"
          android:layout_width="match_parent"
          android:layout_height="200dp"
          android:layout_centerInParent="true" />
  
  </RelativeLayout>
  