title: What is the Clear Purpose of SparseBooleanArray?? [ I referred official android site for this ]
body: <p>I referred the android doc site for "SparseBooleanArray" class but still not getting idea of that class about what is the purpose of that class?? For what purpose we need to use that class??</p>
  
  <p>Here is the Doc Link
  <a href="http://developer.android.com/reference/android/util/SparseBooleanArray.html">http://developer.android.com/reference/android/util/SparseBooleanArray.html</a></p>