0

xmlデータを取得するためにsaxパーサーを使用しています。以下のコードにより、アプリがクラッシュします。

    try {
        url = new URL("The URL");
    } catch (MalformedURLException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
   // RssFeed feed = null;
    try {
        feed = RssReader.read(url);
    } catch (SAXException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

でクラッシュしfeed = RssReader.read(url);ているようです。エボでは正常に動作しますが、ヒーローにインストールすると、以下のエラーが発生します。

04-28 15:57:53.458: E/AndroidRuntime(2749): Uncaught handler: thread main exiting due to uncaught  exception
04-28 15:57:53.589: E/AndroidRuntime(2749): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mlgw.mlgwapp/com.mlgw.mlgwapp.TipsActivity}: java.lang.StringIndexOutOfBoundsException
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:2411)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:648)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.widget.TabHost.setCurrentTab(TabHost.java:320)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:379)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.View.performClick(View.java:2364)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.View.onTouchEvent(View.java:4179)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.View.dispatchTouchEvent(View.java:3709)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:874)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1695)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1116)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.Activity.dispatchTouchEvent(Activity.java:2068)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1679)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1697)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.os.Looper.loop(Looper.java:123)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.ActivityThread.main(ActivityThread.java:4595)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at java.lang.reflect.Method.invokeNative(Native Method)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at java.lang.reflect.Method.invoke(Method.java:521)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at dalvik.system.NativeStart.main(Native Method)
04-28 15:57:53.589: E/AndroidRuntime(2749): Caused by: java.lang.StringIndexOutOfBoundsException
04-28 15:57:53.589: E/AndroidRuntime(2749):     at java.lang.String.substring(String.java:1646)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at nl.matshofman.saxrssreader.RssHandler.endElement(RssHandler.java:67)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at org.apache.harmony.xml.ExpatParser.endElement(ExpatParser.java:159)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at org.apache.harmony.xml.ExpatParser.append(Native Method)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at org.apache.harmony.xml.ExpatParser.parseFragment(ExpatParser.java:506)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at org.apache.harmony.xml.ExpatParser.parseDocument(ExpatParser.java:467)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:329)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:286)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at nl.matshofman.saxrssreader.RssReader.read(RssReader.java:43)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at com.mlgw.mlgwapp.TipsActivity.onCreate(TipsActivity.java:57)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-28 15:57:53.589: E/AndroidRuntime(2749):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)

助けてください！！

これが私のRssHandlerクラスです

package nl.matshofman.saxrssreader;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;

public class RssHandler extends DefaultHandler {

private RssFeed rssFeed;
private RssItem rssItem;
private StringBuilder stringBuilder;

@Override
public void startDocument() {
    rssFeed = new RssFeed();
}

/**
 * Return the parsed RssFeed with it's RssItems
 * @return
 */
public RssFeed getResult() {
    return rssFeed;
}

@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) {
    stringBuilder = new StringBuilder();

    if(qName.equals("item") && rssFeed != null) {
        rssItem = new RssItem();
        rssItem.setFeed(rssFeed);
        rssFeed.addRssItem(rssItem);
    }
}

@Override
public void characters(char[] ch, int start, int length) {
    stringBuilder.append(ch, start, length);
}

@Override
public void endElement(String uri, String localName, String qName) {

    if(rssFeed != null && rssItem == null) {
        // Parse feed properties

        try {
            String methodName = "set" + qName.substring(0, 1).toUpperCase() + qName.substring(1);
            Method method = rssFeed.getClass().getMethod(methodName, String.class);
            method.invoke(rssFeed, stringBuilder.toString());
        } catch (SecurityException e) {
        } catch (NoSuchMethodException e) {
        } catch (IllegalArgumentException e) {
        } catch (IllegalAccessException e) {
        } catch (InvocationTargetException e) {
        }

    } else if (rssItem != null) {
        // Parse item properties

        try {
            if(qName.equals("content:encoded")) 
                qName = "content";
            String methodName = "set" + qName.substring(0, 1).toUpperCase() + qName.substring(1);
            Method method = rssItem.getClass().getMethod(methodName, String.class);
            method.invoke(rssItem, stringBuilder.toString());
        } catch (SecurityException e) {
        } catch (NoSuchMethodException e) {
        } catch (IllegalArgumentException e) {
        } catch (IllegalAccessException e) {
        } catch (InvocationTargetException e) {
        }
    }

}

}わかりました、今これがあると付け加えました

04-28 18:49:35.189: E/AndroidRuntime(3780): Uncaught handler: thread main exiting due to uncaught exception
04-28 18:49:35.328: E/AndroidRuntime(3780): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mlgw.mlgwapp/com.mlgw.mlgwapp.TipsActivity}: java.lang.IllegalArgumentException
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:2411)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:648)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.widget.TabHost.setCurrentTab(TabHost.java:320)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:379)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.View.performClick(View.java:2364)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.View.onTouchEvent(View.java:4179)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.View.dispatchTouchEvent(View.java:3709)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:874)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1695)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1116)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.Activity.dispatchTouchEvent(Activity.java:2068)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1679)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1697)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.os.Looper.loop(Looper.java:123)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.ActivityThread.main(ActivityThread.java:4595)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at java.lang.reflect.Method.invokeNative(Native Method)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at java.lang.reflect.Method.invoke(Method.java:521)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at dalvik.system.NativeStart.main(Native Method)
04-28 18:49:35.328: E/AndroidRuntime(3780): Caused by: java.lang.IllegalArgumentException
04-28 18:49:35.328: E/AndroidRuntime(3780):     at java.util.Random.nextInt(Random.java:221)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at com.mlgw.mlgwapp.TipsActivity.onCreate(TipsActivity.java:71)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-28 18:49:35.328: E/AndroidRuntime(3780):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)
04-28 18:49:35.328: E/AndroidRuntime(3780):     ... 30 more

今、私が使用しているラウンド関数と関係があるようです。

4

1 に答える 1

1

スタックトレースは、エラーの原因を示します。

Caused by: java.lang.StringIndexOutOfBoundsException
     at java.lang.String.substring(String.java:1646)
     at nl.matshofman.saxrssreader.RssHandler.endElement(RssHandler.java:67)

実際のエラーjava.lang.String.substring()はコードではないために発生するため、そこで何も修正できません。しかし、次の行はどこsubstringが呼び出されたかを示しています。RssHandler.java67行目、メソッド内endElement

それは次のようになります。

String methodName = "set" + qName.substring(0, 1).toUpperCase() + qName.substring(1)

文字列インデックスはそれらの文字であるため、qName空であり、最初の文字だけから、または最初の文字の後に始まる部分文字列を作成することはできませんが、アクセスできます。

クラッシュを防ぐためにあなたがすることができます

if (qName != null && qName.length() > 0) {
    String methodName = "set" + qName.substring(0, 1).toUpperCase() + qName.substring(1);
    Method method = rssFeed.getClass().getMethod(methodName, String.class);
    method.invoke(rssFeed, stringBuilder.toString());
}

XMLを見て、期待される形式に適合しないqNameがある理由を見つける必要があります。

またlocalName、の修飾名はで <xsl:template />あるのxsl:templateに対し、ローカル名はであるため、確認することをお勧めしtemplateます。

于 2012-04-28T21:40:55.940 に答える