<?xml version="1.0" encoding="utf-8"?><!--
the clickable here should fix the hanging which occurs sometimes
http://stackoverflow.com/questions/18044277/android-navigation-drawer-bug-using-the-sample
-->
<com.mikepenz.materialize.view.ScrimInsetsFrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/content_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true"
    android:fitsSystemWindows="true" />