Add nullity checks

app/src/main/java/chat/rocket/android/fragment/chatroom/RoomFragment.java

@@ -340,6 +340,7 @@ public class RoomFragment extends AbstractChatRoomFragment implements
         SlidingPaneLayout subPane = getActivity().findViewById(R.id.sub_sliding_pane);
         sidebarFragment = (SidebarMainFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.sidebar_fragment_container);
 
+        if (pane != null) {
             pane.setPanelSlideListener(new SlidingPaneLayout.PanelSlideListener() {
                 @Override
                 public void onPanelSlide(View view, float v) {
@@ -363,6 +364,7 @@ public class RoomFragment extends AbstractChatRoomFragment implements
                 }
             });
         }
+    }
 
     public void closeUserActionContainer() {
         sidebarFragment.closeUserActionContainer();
@@ -657,6 +659,9 @@ public class RoomFragment extends AbstractChatRoomFragment implements
     }
 
     private void showRoomListFragment(int actionId) {
+        //TODO: oddly sometimes getActivity() yields null. Investigate the situations this might happen
+        //and fix it, removing this null-check
+        if (getActivity() != null) {
             Intent intent = new Intent(getActivity(), RoomActivity.class).putExtra("actionId", actionId)
                     .putExtra("roomId", roomId)
                     .putExtra("roomType", roomType)
@@ -665,4 +670,5 @@ public class RoomFragment extends AbstractChatRoomFragment implements
                     .putExtra("userId", userId);
             startActivity(intent);
         }
+    }
 }
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