SwipeRefreshLayout 配置

Question

我正在做一个网络项目并动态更新信息。我有几个关于 SwipeRefreshLayout.

的问题

onRefresh()启动后图标不会停止旋转，即使更新所有数据也不会消失。
当我启动我的应用程序时出现白屏（正在加载信息）。如果我尝试进行刷新，它会起作用，但会加载我的数据的 2 个副本。有没有办法强制 onRefresh() 方法或禁用它直到我的数据加载？
如何在加载数据之前阻止所有操作？

这是我的代码，以便大家理解我在说什么：

主线程：

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_news_page);

    final SwipeRefreshLayout mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.refresh);
    mSwipeRefreshLayout.setOnRefreshListener((SwipeRefreshLayout.OnRefreshListener) new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            na.eraseList();
            new NewsParser().execute();

        }
    });


    mSwipeRefreshLayout.setColorScheme(R.color.red);

    recList = (RecyclerView) findViewById(R.id.cardList);
    recList.setHasFixedSize(true);


     na = new NewsAdapter();
     recList.setAdapter(na);
    new NewsParser().execute();



    LinearLayoutManager llm = new LinearLayoutManager(this);
    llm.setOrientation(LinearLayoutManager.VERTICAL);
    recList.setLayoutManager(llm);

AsyncTask:

    protected Void doInBackground(Void... params) {
            try {
                doc = Jsoup.connect("http://www.gamedev.net/page/index.html").get();
                Element e = doc.getElementById("featured");
                Elements es = e.getElementsByClass("article_content_inner");



                for (Element el : es) {

                    Element forHeader = el.getElementsByTag("strong").first().getElementsByTag("a").first();

                    String URLforImg = el.getElementsByTag("img").first().attr("src");
                    String forDesc = el.getElementsByClass("article_desc").first().html();
                    forDesc = new String(forDesc.substring(forDesc.indexOf("</a>") + 7,forDesc.length()));
                    na.changeList(new NewCard(forHeader.html(), forDesc, URLforImg, forHeader.attr("href")));
                    runOnUiThread(new Runnable()
                    {
                                      @Override
                                      public void run() {
                                          na.notifyDataSetChanged();
                                      }
                                  }
                    );

                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

        protected void onPostExecute(Void params) {

        }
    }

Answer 1

您不得在 asynctask 中使用新线程。先摆脱那个。其次，您应该在您的 onPostExecute 方法中更新您的 UI，这是您需要调用 na.notifyDataSetChanged(); 的地方您还需要调用 swipeLayout.setRefreshing(false); 当您 update/finish 禁用异步任务时loading/refreshing 动画。

关于白屏 - 为什么不在填充列表之前放置一个加载微调器？或者使用旧数据（您在 SharedPreferences 等中保存或预设的数据）填充列表

Answer 2

After the onRefresh() starts the icon won't stop spinning and will not disappear even when all the data is updated.

使用SwipeRefreshLayout.setRefreshing(false)

When I launch my app there is a white screen (while information is loading). If I try to make the refresh it will work but will load 2 copies of my data. Is there a way to force the onRefresh() method OR to disable it until my data is loaded?

How do I block all actions before the data is loaded?

SwipeRefreshLayout.setEnabled(false)

SwipeRefreshLayout 配置

SwipeRefreshLayout configuration

android

android-recyclerview

swiperefreshlayout