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Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setAdapter(android.support.v7.widget.RecyclerView$Adapter)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setAdapter(android.support.v7.widget.RecyclerView$Adapter)' on a null object reference	at br.unisinos.mobicine.classes.WorkInBackground.(WorkInBackground.java:69)	at br.unisinos.mobicine.fragments.DrugstoreFragment.initDataset(DrugstoreFragment.java:114)	at br.unisinos.mobicine.fragments.DrugstoreFragment.onViewCreated(DrugstoreFragment.java:93)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086)	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.executePendingTransactions(FragmentManager.java:570)	at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)	at android.support.v4.view.ViewPager.populate(ViewPager.java:1177)	at android.support.v4.view.ViewPager.populate(ViewPager.java:1025)	at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1545)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)	at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)	at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)	at android.view.View.measure(View.java:18788)	at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)	at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:668)	at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:735)	at android.view.View.measure(View.java:18788)	at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1075)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)	at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)	at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)	at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)	at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)	at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)	at android.view.View.measure(View.java:18788)	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)	at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)	at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)	at android.view.View.measure(View.java:18788)	at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2100)	at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1216)