Android AVIMConversation get()方法获取不到值

AVIMClient avimClient = AVIMClient.getInstance(MainApp.user.getId());
        AVIMConversationQuery query = avimClient.getQuery();
        query.setQueryPolicy(AVQuery.CachePolicy.CACHE_ELSE_NETWORK);
        query.whereEqualTo("objectId", convsId);
        query.findInBackground(new AVIMConversationQueryCallback() {
            @Override
            public void done(final List<AVIMConversation> list, AVIMException e) {
                if (e == null) {
                    if (list != null && !list.isEmpty()) {
                        list.get(0).fetchInfoInBackground(new AVIMConversationCallback() {
                            @Override
                            public void done(AVIMException e) {
                               list.get(0.get("name"));(这里没有网络的时候没有数据为null)
                               
                            }
                        });

                    }
                }
            }
        });