What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them? ... then you put listView. In Common Navigation Paradigms cliffnotes, we discuss the various navigational structures available within Android apps. Android, GridView, Custom GridView, Custom Grid View Example in Android , Image and Text in GridView in Android , Gridview demo in Android,Android Pull requests 1. In the previous article we began hooking our navigation drawer up to the ActionBar by connecting up the Up/Home button. Source: Amazon iOS App (Amazon.com) One of the most common navigation design patterns for applications and websites is none other than the hamburger menu.