Fixed potential null pointer when constructing certain help info popovers

astrid/plugin-src/com/todoroo/astrid/taskrabbit/TaskRabbitActivity.java

@@ -163,7 +163,6 @@ public class TaskRabbitActivity extends FragmentActivity implements LocationList
 
 
     public void showAddListPopover() {
-
         ActionBar actionBar = getSupportActionBar();
         HelpInfoPopover.showPopover(this, actionBar.getCustomView().findViewById(R.id.menu_nav), R.string.help_popover_add_lists, null);
     }

astrid/src/com/todoroo/astrid/activity/TaskListFragment.java

@@ -931,10 +931,13 @@ public class TaskListFragment extends ListFragment implements OnScrollListener,
             quickAddBox.postDelayed(new Runnable() {
                 @Override
                 public void run() {
+                    Activity activity = getActivity();
+                    if (activity != null) {
                         HelpInfoPopover.showPopover(getActivity(), quickAddBox,
                                 R.string.help_popover_add_task, null);
                         Preferences.setBoolean(R.string.p_showed_add_task_help, true);
                     }
+                }
             }, 1000);
         }
     }
@@ -1100,11 +1103,14 @@ public class TaskListFragment extends ListFragment implements OnScrollListener,
                             final View view = getListView().getChildAt(
                                     getListView().getChildCount() - 1);
                             if (view != null) {
+                                Activity activity = getActivity();
+                                if (activity != null) {
                                     HelpInfoPopover.showPopover(getActivity(), view,
                                             R.string.help_popover_tap_task, null);
                                     Preferences.setBoolean(R.string.p_showed_tap_task_help, true);
                                 }
                             }
+                        }
                     } catch (IllegalStateException e) {
                         // Whoops, view is gone. Try again later
                     }