@Override public void onActivityCreated(Bundle savedInstanceState) { if (savedInstanceState != null) { userBean = (UserBean) savedInstanceState.getSerializable("userBean"); accountBean = (AccountBean) savedInstanceState.getSerializable("account"); token = savedInstanceState.getString("token"); hashMap = (HashMap) savedInstanceState.getSerializable("hashmap"); selectedId = savedInstanceState.getString("selectedId"); clearAndReplaceValue((MessageListBean) savedInstanceState.getSerializable("bean")); timeLineAdapter.notifyDataSetChanged(); refreshLayout(bean); } else { if (dbTask == null || dbTask.getStatus() == MyAsyncTask.Status.FINISHED) { dbTask = new DBCacheTask(); dbTask.executeOnExecutor(MyAsyncTask.THREAD_POOL_EXECUTOR); } hashMap.put("0", new MessageListBean()); hashMap.put("1", new MessageListBean()); } super.onActivityCreated(savedInstanceState); groupTask = new GroupTask(); groupTask.executeOnExecutor(MyAsyncTask.THREAD_POOL_EXECUTOR); }