java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.ContentResolver android.content.Context.getContentResolver()' on a null object reference

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Attempt to invoke virtual method 'android.content.ContentResolver android.content.Context.getContentResolver()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.ContentResolver android.content.Context.getContentResolver()' on a null object reference	at org.onebusaway.android.provider.ObaContract$Stops.insertOrUpdate(ObaContract.java:533)	at org.onebusaway.android.ui.ArrivalsListFragment.addToDB(ArrivalsListFragment.java:1507)	at org.onebusaway.android.ui.ArrivalsListFragment.onLoadFinished(ArrivalsListFragment.java:435)	at org.onebusaway.android.ui.ArrivalsListFragment.onLoadFinished(ArrivalsListFragment.java:89)	at android.support.v4.app.LoaderManagerImpl$LoaderInfo.callOnLoadFinished(LoaderManager.java:476)	at android.support.v4.app.LoaderManagerImpl$LoaderInfo.reportStart(LoaderManager.java:315)	at android.support.v4.app.LoaderManagerImpl.doReportStart(LoaderManager.java:819)	at android.support.v4.app.Fragment.performStart(Fragment.java:2009)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1102)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)	at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:742)	at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)	at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:158)	at android.app.ActivityThread.main(ActivityThread.java:7230)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)