Java Android异步任务边界外异常

我的股票报价申请有错误。我有一个应用程序，你可以输入你的a股代码（如股票市场代码），然后用两个按钮列出。一个按钮用于显示报价，另一个按钮用于查看来自web的更多信息。web功能很好，但当我点击quote按钮时，应用程序崩溃了

我认为这就是所讨论的方法

@Override
protected String doInBackground(String... args) {

        try {

            URL url = new URL(args[0]);

            URLConnection connection;
            connection = url.openConnection();

            HttpURLConnection httpConnection = (HttpURLConnection) connection;

            int responseCode = httpConnection.getResponseCode();

            if(responseCode == HttpURLConnection.HTTP_OK) {

                InputStream in = httpConnection.getInputStream();

                DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

                DocumentBuilder db = dbf.newDocumentBuilder();

                Document dom = db.parse(in);

                Element docEle = dom.getDocumentElement();

                NodeList nl = docEle.getElementsByTagName("quote");

                if(nl != null &&  nl.getLength() > 0) {

                    for(int i=0; i < nl.getLength(); i++){

                        StockInfo theStock = getStockInformation(docEle);

                        name = theStock.getName();
                        yearLow = theStock.getYearLow();
                        yearHigh = theStock.getYearHigh();
                        daysLow = theStock.getDaysLow();
                        daysHigh = theStock.getDaysHigh();
                        lastTradePriceOnly = theStock.getLastTradePriceonly();
                        change = theStock.getChange();
                        daysRange = theStock.getDaysRange();

                    }

                }

            }

        }

        catch (MalformedURLException e) {
                Log.d(TAG, "MalformedURLException", e);
            } catch (IOException e) {
                Log.d(TAG, "IOException", e);
            } catch (ParserConfigurationException e) {
                Log.d(TAG, "Parser Configuration Exception", e);
            } catch (SAXException e) {
                Log.d(TAG, "SAX Exception", e);
            }

        finally { }

        return null;
    }

---

很抱歉，我在隔离问题时遇到了困难。

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原因：java.lang.ArrayIndexOutOfBoundsException:length=0；index=0 10-02 02:59:52.738:E/AndroidRuntime（26553）：在com.example.stockquote.StockInfoActivity$MyAsyncTask.doInBackground（StockInfoActivity.java:93）

哪一个是第93行？然后

args

为空。无法获取空数组的第一个元素（

args[0]

）！我怀疑当您调用

doInBackground

时，您没有传递URL数组。

10-02 02:59:52.738: E/AndroidRuntime(26553): FATAL EXCEPTION: AsyncTask #4
10-02 02:59:52.738: E/AndroidRuntime(26553): java.lang.RuntimeException: An error occured while executing doInBackground()
10-02 02:59:52.738: E/AndroidRuntime(26553):    at android.os.AsyncTask$3.done(AsyncTask.java:299)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at java.util.concurrent.FutureTask.run(FutureTask.java:239)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at java.lang.Thread.run(Thread.java:841)
10-02 02:59:52.738: E/AndroidRuntime(26553): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
10-02 02:59:52.738: E/AndroidRuntime(26553):    at com.example.stockquote.StockInfoActivity$MyAsyncTask.doInBackground(StockInfoActivity.java:93)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at com.example.stockquote.StockInfoActivity$MyAsyncTask.doInBackground(StockInfoActivity.java:1)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
10-02 02:59:52.738: E/AndroidRuntime(26553):    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
10-02 02:59:52.738: E/AndroidRuntime(26553):    ... 4 more