Android 对象文件损坏

发布于 2024-11-04 02:56:08 字数 8770 浏览 4 评论 0原文

我是 Android 开发新手,一直在尝试创建一些基本的应用程序来适应该平台。我有一个基本的应用程序,允许用户输入带有定义的单词。主视图是一个由 ArrayAdapter 填充的列表视图,该 ArrayAdapter 由 ArrayList 提供。当用户选择添加单词时,他们可以输入名称和定义,如果该名称尚未在列表中,则会将其添加到列表中。然后将名称和定义放入 Word 对象(实现链接列表以引用已输入的所有单词的自定义对象)。程序的这一部分工作正常,我可以添加任意数量的单词,问题在于保存。我在一个名为 wordlist 的对象中引用了单词对象链接列表的根(该对象还包含 ArrayList)。我已经对所有对象实现了 Serializeable,我的计划是每次添加单词时保存整个单词列表对象。为此,我在 Add_Word 活动(当用户选择添加单词时调用的活动)中实现了以下内容:

try                     
{                       
    FileOutputStream fileOut = openFileOutput("words.obj", Context.MODE_PRIVATE);
    ObjectOutputStream objectOut = new ObjectOutputStream(fileOut);
    objectOut.writeObject(Activity_Main.wordlist);
    objectOut.close();
    fileOut.close();
} 
catch (IOException e) 
{
    Context context = getApplicationContext();
    CharSequence text = "File Error";
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(context, text, duration);
    toast.show();
}

现在,此代码似乎在大部分情况下都有效,我可以毫无问题地保存和加载我的单词,直到由于某种原因,我尝试添加强制的第 22 个词关闭了程序。然后,当我尝试再次打开它时,它会在弹出时立即强制关闭。这对我来说也很奇怪,因为我在启动活动的 onCreate 方法中有一个 try catch 语句,它应该捕获文件的任何问题并简单地重新创建对象:

try
{
            FileInputStream fileIn = this.openFileInput("words.obj");
            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
            wordlist = (Words) objectIn.readObject();
            objectIn.close();
            fileIn.close();
}
catch (Exception e)
{
    wordlist = new Words();
}

如果我进入手机上的应用程序并清除数据能够启动备份。我找不到任何有类似问题的人(据我所知)。我确实尝试注释掉文件输出部分,一切正常,只是无法保存。任何想法将不胜感激。 (如果不清楚我正在尝试本地保存到我的程序)。

我的开发环境:Windows 7 64位、Eclipse 64位、Java 64位(我知道有些人在64位Java和Eclipse上遇到了问题,但我已经能够在这个环境下开发其他Java和Android程序)。我使用了Android 2.1 update 1模拟器,它在模拟器中做了同样的事情。我还有一部 Android 2.1 update 1 手机,也有同样的问题,我已经更新到 2.2,但仍然有同样的问题。

更新: 感谢您的回复,我查看了日志,这是程序崩溃时得到的结果:

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): FATAL EXCEPTION: main

04-28 18:04:27.629:错误/AndroidRuntime(16570): java.lang.StackOverflowError

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.util.IdentityHashMap.findIndex(IdentityHashMap.java:419)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.util.IdentityHashMap.get(IdentityHashMap.java:371)

04-28 18:04:27.629: 错误/AndroidRuntime(16570): 在 java.io.ObjectOutputStream.dumpCycle(ObjectOutputStream.java:478)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1751)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java) :1701)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream .writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1859) 04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: 错误/AndroidRuntime(16570): 在 java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java) :1251)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream .writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: 错误/AndroidRuntime(16570): 在 java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java) :1251)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream .writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: 错误/AndroidRuntime(16570): 在 java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java) :1251)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream .writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: 错误/AndroidRuntime(16570): 在 java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java) :1251)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream .writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: 错误/AndroidRuntime(16570): 在 java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java) :1251)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream .writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: 错误/AndroidRuntime(16570): 在 java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18: 04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java) :1251)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629:错误/AndroidRuntime(16570):在java.io.ObjectOutputStream .writeObjectInternal(ObjectOut

因此,我假设有一个内存问题,但我仍然很困惑为什么这么少量的数据会发生这种情况。我将考虑使用数据库,但我希望有更多关于造成此问题的想法。

I am new to android development and have been trying to create some basic apps to get used to the platform. I have a basic app that allows a user to input words with definitions. The main view is a listview that is populated by an ArrayAdapter which is fed from an ArrayList. When the user chooses to add a word they can input a name and definition, and if that name is not already in the list it is added to the list. The name and definition are then put into a Word object (custom object that implements a linked list to reference all words that have been input). This part of the program works fine, I am able to add as many words as I want, the problem is with the saving. I have a reference to the root of my linked list of word objects in an object called wordlist (this object also holds the ArrayList). I have implemented Serializeable with all of my objects and my plan was to save the entire wordlist object each time a word is added. To do this I implemented the following in my Add_Word activity (the activity called when the user chooses to add a word):

try                     
{                       
    FileOutputStream fileOut = openFileOutput("words.obj", Context.MODE_PRIVATE);
    ObjectOutputStream objectOut = new ObjectOutputStream(fileOut);
    objectOut.writeObject(Activity_Main.wordlist);
    objectOut.close();
    fileOut.close();
} 
catch (IOException e) 
{
    Context context = getApplicationContext();
    CharSequence text = "File Error";
    int duration = Toast.LENGTH_SHORT;
    Toast toast = Toast.makeText(context, text, duration);
    toast.show();
}

Now this code does seem to work for the most part, I am able to save and load my words without any problems until for some reason the 22nd word I try to add force closes the program. Then when I try to open it again it will force close as soon as it pops up. This is also weird to me because I have a try catch statement in the onCreate method of the starting activity that should catch any problem with the file and simply recreate the object:

try
{
            FileInputStream fileIn = this.openFileInput("words.obj");
            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
            wordlist = (Words) objectIn.readObject();
            objectIn.close();
            fileIn.close();
}
catch (Exception e)
{
    wordlist = new Words();
}

If I go into my applications on my phone and clear the data it is able to start back up. I could not find anyone who had a similar problem (as far as I could tell). I did try commenting out the file output section and everything works fine, it just wont save. Any ideas would be greatly appreciated. (In case it is not clear I am trying to save locally to my program).

My development environment: Windows 7 64bit, Eclipse 64bit, Java 64bit (I know some people have had problems with 64bit Java and Eclipse, but I have been able to develop other Java and Android programs in this environment). I used the Android 2.1 update 1 emulator, and it does the same thing in the emulator. I also had an Android 2.1 update 1 phone which had the same problem, I have since updated to 2.2 and still the same problem.

UPDATE:
Thanks for the responses, I looked at the log and this is what I got when the program crashed:

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): FATAL EXCEPTION: main

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): java.lang.StackOverflowError

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.util.IdentityHashMap.findIndex(IdentityHashMap.java:419)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.util.IdentityHashMap.get(IdentityHashMap.java:371)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.dumpCycle(ObjectOutputStream.java:478)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1751)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1859)
04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1859)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1701)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1665)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)

04-28 18:04:27.629: ERROR/AndroidRuntime(16570): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOut

So by this I am assuming that there is a memory problem, but I am still confused as to why this is happening with such a small amount of data. I will look into using a DB but I would appreciate any more ideas of what is causing this.

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评论(3

岁吢 2024-11-11 02:56:08

您可能会因序列化对象而遇到内存问题。您尝试过使用数据库吗?

如果您包含从 LogCat 获得的任何错误,也会很有帮助。

You're probably running into memory problems by serializing your object. Have you tried it using a database?

It would also be helpful if you'd include any errors your getting from LogCat.

暖伴 2024-11-11 02:56:08

我认为这个问题可能会让您感兴趣:StackOverflowError when serializing an object in Java

最简单的解决方案:不要序列化数组列表。考虑使用数据库或简单的数据文件。

I think this question might interest you : StackOverflowError when serializing an object in Java

Simplest solution: don't serialize arraylists. Consider using a database or simple data files.

站稳脚跟 2024-11-11 02:56:08

就我而言,问题是我有时可能会异步读写。文件将在读取过程中被覆盖,导致 EOFException 或“readObject()”中的内部 IndexOutOfBounds。

将同步添加到我所有的读写方法对我来说很有效。

On my case the problem was I might sometimes read and write asynchronously. The file would be overwritten in the middle of a read, causing EOFException or an internal IndexOutOfBounds in "readObject()".

Adding synchronized to all my read and write methods worked for me.

~没有更多了~
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