Fixed some null pointer exceptions in tag view activity callbacks

astrid/plugin-src/com/todoroo/astrid/actfm/TagViewActivity.java

@@ -271,14 +271,17 @@ public class TagViewActivity extends TaskListActivity {
                     String oldName = tagData.getValue(TagData.NAME);
                     actFmSyncService.fetchTag(tagData);
 
-                    DialogUtilities.dismissDialog(getActivity(), progressDialog);
+                    Activity activity = getActivity();
-                    getActivity().runOnUiThread(new Runnable() {
+                    if (activity != null) {
+                        DialogUtilities.dismissDialog(activity, progressDialog);
+                        activity.runOnUiThread(new Runnable() {
                             @Override
                             public void run() {
                                 if(noRemoteId && tagData.getValue(TagData.REMOTE_ID) > 0)
                                     refreshData(manual, true);
                             }
                         });
+                    }
 
                     if(!oldName.equals(tagData.getValue(TagData.NAME))) {
                         TagService.getInstance().rename(oldName,
@@ -304,28 +307,34 @@ public class TagViewActivity extends TaskListActivity {
         actFmSyncService.fetchTasksForTag(tagData, manual, new Runnable() {
             @Override
             public void run() {
-                getActivity().runOnUiThread(new Runnable() {
+                final Activity activity = getActivity();
+                if (activity != null) {
+                    activity.runOnUiThread(new Runnable() {
                         @Override
                         public void run() {
                             loadTaskListContent(true);
                             ((TextView)taskListView.findViewById(android.R.id.empty)).setText(R.string.TLA_no_items);
-                        DialogUtilities.dismissDialog(getActivity(), progressDialog);
+                            DialogUtilities.dismissDialog(activity, progressDialog);
                         }
                     });
                 }
+            }
         });
 
         actFmSyncService.fetchUpdatesForTag(tagData, manual, new Runnable() {
             @Override
             public void run() {
+                final Activity activity = getActivity();
+                if (activity != null) {
                     getActivity().runOnUiThread(new Runnable() {
                         @Override
                         public void run() {
                             //refreshUpdatesList();
-                        DialogUtilities.dismissDialog(getActivity(), progressDialog);
+                            DialogUtilities.dismissDialog(activity, progressDialog);
                         }
                     });
                 }
+            }
         });
 
     }