SwipeRefreshLayout没有停止刷新

Question

在片段的onCreateView方法中：

swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            refresh();
        }
});

我的refresh()方法类似于：

public void {
    //some action

    swipeRefreshLayout.setRefreshing(false);
}

但有时swipeRefresLayout并没有停止提神。当我调试代码时，它甚至不会转到refresh()方法。

我怎么才能修好它？

编辑：更清晰的代码在这里：

public class VisaCardsFragment extends Fragment {

@Bind(R.id.swipe_refresh_layout)
SwipeRefreshLayout swipeRefreshLayout;

@Bind(R.id.recycler_view_visa_cards)
RecyclerView recyclerViewVisaCards;

@Bind(R.id.text_view_message)
TextView textViewMessage;

private List<Card> cards;
private List<VisaCard> visaCards;
private VisaCardsAdapter adapter;


public VisaCardsFragment() {
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_visa_cards, container, false);
    setHasOptionsMenu(true);
    ButterKnife.bind(this, view);

    visaCards = new ArrayList<>();
    adapter = new VisaCardsAdapter(visaCards);
    recyclerViewVisaCards.setAdapter(adapter);
    recyclerViewVisaCards.setHorizontalScrollBarEnabled(true);
    recyclerViewVisaCards.setLayoutManager(new LinearLayoutManager(VisaCardsFragment.this.getActivity(), LinearLayoutManager.VERTICAL, false));


    cards = Card.getActiveCards();
    if (cards.isEmpty()) {
        showMessage("Cards unavailable");
        return view;
    }

    swipeRefreshLayout.setRefreshing(true);
    getVisaResponse(); // method containing server request (RESTful) to get visa cards (VisaCard) using the data of cards (Card)


    swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            refresh();
        }
    });

    return view;
}

public void refresh() {
    hideMessage();
    cards = Card.getActiveCards();
    if (cards.isEmpty()) {
        clearList();
        swipeRefreshLayout.setRefreshing(false);
        showMessage("Visa cards not found");
        return;
    }
    getVisaResponse();// method containing server request (RESTful) to get visa cards (VisaCard) using the data of cards (Card)
}

public void showMessage(String message) {
    textViewMessage.setText(message);
    textViewMessage.setVisibility(View.VISIBLE);
}

public void hideMessage() {
    textViewMessage.setText("");
    textViewMessage.setVisibility(View.GONE);
}

}

Answer 1

我想回答我自己的问题，这样如果某人犯了同样的错误，他/她就会找到解决办法。

我的问题是，有时并没有停止刷新。当我调试代码时，它甚至不会转到refresh() 方法，正如您所看到的，并不总是这样。

好吧，什么时候发生的？它发生了，cards列表是空的。

...

cards = Card.getActiveCards();
if (cards.isEmpty()) {
    showMessage("Cards unavailable");
    return view;
}

//some code here

swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        refresh();
    }
});

...

由于它是在cards列表为空时编写的，因此它返回包含没有refreshListener的swipeRefreshLayout的view。因此，当您刷新时，不会发生任何事情，因为没有listener。

解决方案只是在返回listener之前设置view，如下所示：

...

swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        refresh();
    }
});

//some code here

cards = Card.getActiveCards();
if (cards.isEmpty()) {
    showMessage("Cards unavailable");
    return view;
}
...

Answer 2

  <?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/swipe_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ListView
        android:id="@+id/listaNoticias"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="6dp"
        android:layout_marginRight="6dp"
        android:layout_marginTop="5dp" >
    <ListView>

</android.support.v4.widget.SwipeRefreshLayout>

这里是java代码的实现；

     public class classname extends Fragment implements OnRefreshListener {
    SwipeRefreshLayout swipeLayout;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    // Inflate the layout for this fragment
    view = inflater.inflate(R.layout.classname, container, false);

    swipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_container);
    swipeLayout.setOnRefreshListener(this);


@Override
public void onRefresh() {
   //action
   //and set false to stop.
}

Answer 3

只有在检测到滑动手势时才会触发SwipeRefreshLayout.OnRefreshListener，请参阅文档。

当滑动手势触发刷新时调用。

但是在您的代码中，您可以通过调用：

swipeRefreshLayout.setRefreshing(true);

因此，刷新指示器从这里开始刷新，SwipeRefreshLayout.OnRefreshListener就不会被触发。如果您想在Fragment启动时开始刷新，只需在setRefreshing(true)之后立即调用refresh()

swipeRefreshLayout.setRefreshing(true);
refresh();

或者，如果您想刷新直到用户做出一个滑动手势，只需删除这一行。

swipeRefreshLayout.setRefreshing(true);

当检测到滑动手势时，您的SwipeRefreshLayout.OnRefreshListener将被触发。