Don't reset scroll position when updating device/folder list (fixes #579).

src/main/java/com/nutomic/syncthingandroid/fragments/DeviceListFragment.java

@@ -104,11 +104,14 @@ public class DeviceListFragment extends ListFragment implements SyncthingService
             setListAdapter(mAdapter);
         }
 
+        // Prevent scroll position reset due to list update from clear().
+        mAdapter.setNotifyOnChange(false);
         mAdapter.clear();
         List<RestApi.Device> devices = activity.getApi().getDevices(false);
         Collections.sort(devices, DEVICES_COMPARATOR);
         mAdapter.addAll(devices);
         mAdapter.updateConnections(activity.getApi());
+        mAdapter.notifyDataSetChanged();
         setListShown(true);
     }
 

src/main/java/com/nutomic/syncthingandroid/fragments/FolderListFragment.java

@@ -105,11 +105,14 @@ public class FolderListFragment extends ListFragment implements SyncthingService
             setListAdapter(mAdapter);
         }
 
+        // Prevent scroll position reset due to list update from clear().
+        mAdapter.setNotifyOnChange(false);
         mAdapter.clear();
         List<RestApi.Folder> folders = activity.getApi().getFolders();
         Collections.sort(folders, FOLDERS_COMPARATOR);
         mAdapter.addAll(folders);
         mAdapter.updateModel(activity.getApi());
+        mAdapter.notifyDataSetChanged();
         setListShown(true);
     }
 

src/main/java/com/nutomic/syncthingandroid/util/DevicesAdapter.java

@@ -79,6 +79,6 @@ public class DevicesAdapter extends ArrayAdapter<RestApi.Device>
     @Override
     public void onReceiveConnections(Map<String, RestApi.Connection> connections) {
         mConnections = connections;
-        notifyDataSetInvalidated();
+        notifyDataSetChanged();
     }
 }