在Android上,simple-xml serial.read()抛出StackOverflowError

时间:2011-05-02 15:05:36

标签: java android simple-framework

我正在尝试学习在Java中使用xml(Android平台,使用Eclipse和simple-xml-2.5.2)。 我一直在“Training.java”的“serial.read”行中得到一个奇怪的java.lang.StackOverflowError。 你能帮忙解决问题吗?它是一个xml定义错误吗?

我包含以下来源:

文件beacons.java:

package com.marcos.training;

import java.util.List;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;

@Element
public class Beacons {
    @ElementList(inline=true)
    private List<Beacon> list;

    @Element
    private String id;

    public String getId() {
       return id;
    }

    public Integer getSize() {
        return list.size();
    }

    public List<Beacon> getList() {
       return list;
    }
}

文件Beacon.java:

package com.marcos.training;

import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class Beacon {

    @Attribute
    protected String ssid;

    @Element
    protected String bssid;

    public String getSsid() {
       return ssid;
    }

    public String getBssid() {
      return bssid;
   }
}

File Training.java:

package com.marcos.training;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.content.res.Resources.NotFoundException;

public class Training extends Activity {
private final static String TAG = Training.class.getCanonicalName();
TextView textStatus;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        textStatus = (TextView) findViewById(R.id.textStatus);

        Serializer serial = new Persister();

        try {
            Beacons myBeacons;
            try {
                myBeacons = serial.read(Beacons.class, getResources().openRawResource(R.xml.beacons));
            Log.i(TAG, "Number of Beacons: " + myBeacons.getSize());
        } catch (NotFoundException e) {
                Log.d(TAG, "Uncaught exception", e);
            return;
        } catch (Exception e) {
                Log.d(TAG, "Uncaught exception", e);
            return;
        }

        int len = myBeacons.getSize();
            for (int i = 0; i < len; i++) {
                Beacon b = myBeacons.getList().get(i);
                textStatus.append("Beacon " + (i+1) + "\n");
                textStatus.append(" SSID   : " + b.getSsid() + "\n");
                textStatus.append(" BSSID  : " + b.getBssid() + "\n");
                textStatus.append("\n");;
            }
        } catch (Exception e) {
            Log.d(TAG, "Uncaught exception", e);
        }
    }
}

文件beacons.xml:

<?xml version="1.0" encoding="utf-8"?>
<beacons id="1">
 <beacon ssid="north">
  <bssid>01:02:03:04:05:06</bssid>
 </beacon>
 <beacon ssid="east">
  <bssid>02:03:04:05:06:07</bssid>
 </beacon>
 <beacon ssid="south">
  <bssid>03:04:05:06:07:08</bssid>
 </beacon>
 <beacon ssid="west">
  <bssid>04:05:06:07:08:09</bssid>
 </beacon>
</beacons>

1 个答案:

答案 0 :(得分:2)

通过将您的XML文件放入资源的XML目录中,Android构建系统假设您希望将其编译成二进制格式并且它需要您。因此,当您访问该输入流,然后尝试将其视为文本XML表示时,它就不起作用。你有两个选择。

  1. 将您的XML文件移至res\raw目录。
  2. 将其保留原样并使用getResources().getXml(R.xml.beacons) API并为您的特定XML创建拉解析器。
  3. 有关详细信息,请参阅this link