Android应用程序意外停止

Question

我正在开发一个使用谷歌地图版本2的andorid应用程序。我使用DOM读取了一个xml文件以获取我需要的数据。一切都很好用XML解析（我看到从logcat）。读入的数据放入Hotel类型的ArrayList（我的一个类）。当我尝试使用lat和lng信息来放置标记时，我读取了我的应用程序停止。但是，只有当我读入循环时才会停止，而不是当我只读取一个（例如最后一个添加到列表中）。我试图将名单缩短为一半，但它不工作。

下面是代码： Hoteli.java：

public class Hoteli extends FragmentActivity { 
GoogleMap map; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_hoteli); 
    setTitle("Хотели"); 

    ArrayList<Hotel> hoteli= new ArrayList<Hotel>(); 
    Hotel h=null; 

    Log.d("", "pred try delot"); 
    try { 
     InputStream in = this.getResources().openRawResource(R.raw.hoteli); 
     StringBuffer str = new StringBuffer(); 
     DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
     DocumentBuilder db = dbf.newDocumentBuilder(); 
     Document document = db.parse(in, null); 
     document.getDocumentElement().normalize(); 

     Log.d("", "Root element :" 
       + document.getDocumentElement().getNodeName()); 

     NodeList nList = document.getElementsByTagName("hotel"); 

     Log.d("", "----------------------------"); 
     Log.d("",Integer.toString(nList.getLength())); 
     for (int temp = 0; temp < nList.getLength(); temp++) { 

      h= new Hotel(); 
      Node nNode = nList.item(temp); 

      Log.d("", "\nCurrent Element :" + nNode.getNodeName()); 

      if (nNode.getNodeType() == Node.ELEMENT_NODE) { 

       Element eElement = (Element) nNode; 

       Log.d("", "Staff hotel : " + eElement.getAttribute("hotel")); 
       h= new Hotel(); 
       Log.d("", "Name: " 
         + eElement.getElementsByTagName("name").item(0) 
           .getTextContent()); 
       h.setName(eElement.getElementsByTagName("name").item(0) 
           .getTextContent()); 
       Log.d("", "City : " 
         + eElement.getElementsByTagName("city").item(0) 
           .getTextContent()); 
       h.setCity(eElement.getElementsByTagName("city").item(0) 
           .getTextContent()); 
       Log.d("", "Lat : " 
         + eElement.getElementsByTagName("lat").item(0) 
           .getTextContent()); 
       h.setLat(eElement.getElementsByTagName("lat").item(0) 
           .getTextContent()); 
       Log.d("", "Lng : " 
         + eElement.getElementsByTagName("lng").item(0) 
           .getTextContent()); 
       h.setLng(eElement.getElementsByTagName("lng").item(0) 
           .getTextContent()); 
       Log.d("", 
         "Stars : " 
           + eElement.getElementsByTagName("stars") 
             .item(0).getTextContent()); 
       h.setStars(eElement.getElementsByTagName("stars") 
             .item(0).getTextContent()); 
       Log.d("", 
         "Description : " 
           + eElement 
             .getElementsByTagName("desciption") 
             .item(0).getTextContent()); 
       h.setDescription(eElement 
             .getElementsByTagName("desciption") 
             .item(0).getTextContent()); 
       hoteli.add(h); 

      } 
     } 

    } catch (Exception err) { 
     err.printStackTrace(); 
    } 

    map = ((SupportMapFragment) getSupportFragmentManager() 
      .findFragmentById(R.id.mapaHoteli)).getMap(); 
int halfLength= hoteli.size()/2; 
    for(int i=0;i<halfLength;i++) 
    { 
    final LatLng currentPositionLatLng=new LatLng(Double.parseDouble(hoteli.get(i).getLat()), Double.parseDouble(hoteli.get(i).getLng())); 
    Marker currentPosition = map.addMarker(new MarkerOptions() 
       .position(currentPositionLatLng) 
       .title("\"" +hoteli.get(i).getName()+"\""+ " "+ hoteli.get(i).getStars()+ " ѕвезди") 
       .snippet(hoteli.get(i).getCity() + hoteli.get(i).getDescription()) 
       .icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher))); 

}} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.hoteli, menu); 
    return true; 
} 
} 

Hotel.java：

05-25 22:17:56.937: E/AndroidRuntime(18639): FATAL EXCEPTION: main 
05-25 22:17:56.937: E/AndroidRuntime(18639): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.probna/com.example.probna.Hoteli}: java.lang.NumberFormatException 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1670) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1686) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.app.ActivityThread.access$1500(ActivityThread.java:118) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:932) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.os.Handler.dispatchMessage(Handler.java:99) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.os.Looper.loop(Looper.java:130) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.app.ActivityThread.main(ActivityThread.java:3706) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at java.lang.reflect.Method.invokeNative(Native Method) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at java.lang.reflect.Method.invoke(Method.java:507) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at dalvik.system.NativeStart.main(Native Method) 
05-25 22:17:56.937: E/AndroidRuntime(18639): Caused by: java.lang.NumberFormatException 
05-25 22:17:56.937: E/AndroidRuntime(18639): at org.apache.harmony.luni.util.FloatingPointParser.parseDblImpl(Native Method) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at org.apache.harmony.luni.util.FloatingPointParser.parseDouble(FloatingPointParser.java:283) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at java.lang.Double.parseDouble(Double.java:318) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at com.example.probna.Hoteli.onCreate(Hoteli.java:131) 
    05-25 22:17:56.937: E/AndroidRuntime(18639):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
05-25 22:17:56.937: E/AndroidRuntime(18639): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1634) 
05-25 22:17:56.937: E/AndroidRuntime(18639): ... 11 more 

Answer 1

您有一个错误在解析hoteli.get(i).getLat()：从logcat的

public class Hotel { 
String name; 
String city; 
String lat; 
String lng; 
String stars; 
String description; 

public Hotel() 
{} 

public String getName() { 
    return name; 
} 
public void setName(String name) { 
    this.name = name; 
} 
public String getCity() { 
    return city; 
} 
public void setCity(String city) { 
    this.city = city; 
} 
public String getLat() { 
    return lat; 
} 
public void setLat(String lat) { 
    this.lat = lat; 
} 
public String getLng() { 
    return lng; 
} 
public void setLng(String lng) { 
    this.lng = lng; 
} 
public String getStars() { 
    return stars; 
} 
public void setStars(String stars) { 
    this.stars = stars; 
} 
public String getDescription() { 
    return description; 
} 
public void setDescription(String description) { 
    this.description = description; 
} 
} 

错误和hoteli.get(i).getLng()

也许你在这个方法中有空的字符串编号，或者“，”不是“。”作为数字分隔符。