无法获取纺纱进度条工作 [英] Can't get spinning Progress Bar to work

问题描述

不管是什么我尝试，我不能让我的进度条来工作。这里是code：

No matter what I try I can't get my progress bar to work. Here is the code:

public void setDayView(final int _day, final int _month, final int _year) {
    ProgressBar progressBar = (ProgressBar)findViewById(R.id.progressBar);
    progressBar.setVisibility(ProgressBar.VISIBLE);
    comm = new Thread() {

        public void run() {
            final postRequest req = new postRequest(username, password);
            doc = (Document) req.GetDayEvents(_day, _month, _year);
        }
    };
    comm.start();
    while (comm.isAlive()) { // waiting for network to finish

    }
    progressBar.setVisibility(ProgressBar.GONE);
    NodeList eventsTitles = doc.getElementsByTagName("Title");
    NodeList eventsClasses = doc.getElementsByTagName("Class");
    NodeList eventsTypes = doc.getElementsByTagName("Type");
    NodeList eventsComments = doc.getElementsByTagName("Comment");
    NodeList eventsAmounts = doc.getElementsByTagName("Amount");
    NodeList eventsHashes = doc.getElementsByTagName("Hash");
    NodeList refCurrency = doc.getElementsByTagName("RefCurrency");
    NodeList dateStamp = doc.getElementsByTagName("DateStamp");

    final int nrOfEvents = eventsTitles.getLength();
    LinearLayout dayEventsArea = (LinearLayout) findViewById(R.id.DayEventsArea);

    // set SelectedDayLabel
    TextView selDayLabel = (TextView) findViewById(R.id.selectedDayLabel);
    selDayLabel.setText(dateStamp.item(0).getTextContent());
    //

    // set day totals labels
    TextView dayDebit = (TextView) findViewById(R.id.dayDebitLabel);
    TextView dayOutgo = (TextView) findViewById(R.id.dayOutgoLabel);
    TextView dayIncome = (TextView) findViewById(R.id.dayIncomeLabel);
    dayDebit.setText("Debit: "
            + doc.getElementsByTagName("DayDebit").item(0).getTextContent()
            + " " + refCurrency.item(0).getTextContent());
    dayOutgo.setText("Outgo: "
            + doc.getElementsByTagName("DayOutgo").item(0).getTextContent()
            + " " + refCurrency.item(0).getTextContent());
    dayIncome.setText("Income: "
            + doc.getElementsByTagName("DayIncome").item(0)
                    .getTextContent() + " "
            + refCurrency.item(0).getTextContent());
    //
    dayEventsArea.removeAllViews();

    // clearing all local caches
    _eventsTitlesLocalCopy.clear();
    _eventsClassesLocalCopy.clear();
    _eventsAmountsLocalCopy.clear();
    _eventsCommentsLocalCopy.clear();
    _eventsTypesLocalCopy.clear();
    _eventsHashesLocalCopy.clear();
    //
    for (int i = 0; i < eventsTitles.getLength(); i++) {
        // creating a local cache of the day events, as they can be edited
        // and sent back
        _eventsTitlesLocalCopy.add(eventsTitles.item(i).getTextContent());
        _eventsClassesLocalCopy.add(eventsClasses.item(i).getTextContent());
        _eventsAmountsLocalCopy.add(eventsAmounts.item(i).getTextContent());
        _eventsCommentsLocalCopy.add(eventsComments.item(i)
                .getTextContent());
        _eventsTypesLocalCopy.add(eventsTypes.item(i).getTextContent());
        _eventsHashesLocalCopy.add(eventsHashes.item(i).getTextContent());
        //

和从layout.xml code

and code from layout.xml

<ProgressBar
    android:id="@+id/progressBar"
    style="?android:attr/progressBarStyleLarge"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:indeterminate="true"
    android:layout_gravity="center" />

如果我关掉code线progressBar.setVisibility（ProgressBar.GONE）;那么我的进度条显示所有的时间，所以它的实际工作。

If I turn off code line progressBar.setVisibility(ProgressBar.GONE); then my progress bar is shown all the time, so it actually works.

推荐答案

我会建议使用的这不是你的线程执行的AsyncTask （点击文档中的链接，一个明显的例子上）。你可以开始当进度条可见，并在 onPostExecute 方法再次将其隐藏。我期待一些问题与您while循环，这将是干净多了。

I would suggest using an AsyncTask for this instead of your Thread-implementation (click on the link for a clear example in the documentation). You can make the progress bar visible when initiating and hide it again in the onPostExecute method. I expect some problem with your while-loop, this would be much cleaner.

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