creating a map fragment along with other fragments in an app

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http://stackoverflow.com – Am trying to create and app with one activity but multiple fragment. to achieve this i have created the Main Activity and set a View-pager in its layout file. The main Activity connect to the internet via its Ascyn Task download the required information stores it in an Array-list which will be used to fill out data on the Three Main fragments(Map Fragment, List-fragment,Augmented Reality-Fragment) the issue am having is that for some reason the map will not display it gives me a null pointer before I even load the data. Please what am I doing Wrong: public class MapDispalyFragment extends S (HowTos)