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public class RvList extends BaseFragment {

    private boolean isConnected;
    public RecyclerView mRecyclerView;
    private FloatingActionButton floatingActionButton;
    private SwipeRefreshLayout swipeRefreshWidget;
    private RvAdapter adapter;

    @Override
    protected View initView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view= inflater.inflate(R.layout.viewpager_rv, container, false);
        mRecyclerView = (RecyclerView) view.findViewById(R.id.rv);
        swipeRefreshWidget = (SwipeRefreshLayout) view.findViewById(R.id.swipe_refresh_widget);
        swipeRefreshWidget.setColorSchemeResources(R.color.colorPrimaryDark, R.color.colorAccent,R.color.colorPrimary);//setColorSchemeResources():設置進度條的顏色主題，最多設置四種
        floatingActionButton = (FloatingActionButton) view.findViewById(R.id.fab);//FloatingActionButton的Id
        floatingActionButton.setOnClickListener(new View.OnClickListener() {//FAB的點擊事件
            @Override
            public void onClick(View v) {
                mRecyclerView.smoothScrollToPosition(0);
            }
        });
        mRecyclerView.setLayoutManager(new LinearLayoutManager(mActivity,LinearLayoutManager.VERTICAL,false));
        return view;
    }

    @Override
    protected void initData() {
        isConnected = Utility.checkNetworkConnection(mActivity);
        adapter = new RvAdapter(mActivity);
        swipeRefreshWidget.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        if (isConnected) {
                            new LoadNewsTask(adapter).execute();
                            Toast.makeText(mActivity, "刷新完成", Toast.LENGTH_SHORT).show();
                            swipeRefreshWidget.setRefreshing(false);
                        } else {
                            Utility.noNetworkAlert(mActivity);
                            swipeRefreshWidget.setRefreshing(false);//設置SwipeRefreshLayout當前是否處于刷新狀態(tài)，一般是在請求數(shù)據(jù)的時候設置為true，在數(shù)據(jù)被加載到View中后，設置為false。
                        }
                    }
                },1000);
            }
        });
/*        if (isConnected) new LoadNewsTask(adapter).execute();
        else Utility.noNetworkAlert(mActivity);*/
        mRecyclerView.setAdapter(adapter);
    }
}

注：initView在onCreateView中 initData在onActivityCreated當中

注釋掉的那兩句話

if (isConnected) new LoadNewsTask(adapter).execute(); else Utility.noNetworkAlert(mActivity);

之前可以完美允許
但是想添加個SwipeRefreshLayout進行下拉刷新后的加載 但是 Toast打印出來了就是加載不出來數(shù)據(jù)
請問有人知道什么緣故嗎