db4o中的蜂窝Db4oException：文件格式不兼容 [英] db4o on Honeycomb Db4oException: File format incompatible

问题描述

我使用了db4o在一个小项目，在Android 2.2，2.3，等的伟大工程在蜂窝，然而，数据库初始化会导致以下错误：

I'm using db4o in a small project that works great on Android 2.2, 2.3, etc. On Honeycomb, however, database initialization results in the following error:

com.db4o.ext.Db4oException: File format incompatible: '/data/data/com.myapp/app_data/my_app.db4o'

这强制关闭和错误发生在既有的Xoom运行的蜂窝和Galaxy Tab的运行蜂窝。

This force close and the error occur on both a Xoom running Honeycomb and a Galaxy Tab running Honeycomb.

相关code是：

public ObjectContainer db() {
    // Create, open, and close the database
    try {
        if (oc == null || oc.ext().isClosed()) {
            oc = Db4oEmbedded
                    .openFile(dbConfig(), db4oDBFullPath(mContext));
        }
        return oc;
    } catch (Exception e) {
        Log.e(CFAApplication.TAG, e.toString());
        return null;
    }
}

private String db4oDBFullPath(Context ctx) {
    // Returns the path for the database location
    return ctx.getDir("data", 2) + "/" + "myapp.db4o";
}

public List<MyItem> getListItem(final String passedItemTitle) {
    List<MyItem> result = db().query(new Predicate<MyItem>() { // Error occurs here
        public boolean match(MyItem listItem) {
            if (passedItemTitle.equals(listItem.getTitle())) {
                return true;
            }
            return false;
        }
    });
    return result;
}

是否有蜂窝处理其外部文件系统的方式有些区别？有什么我可以在db4oDBFullPath（）方法来更改，这将使这两个兼容？我真的很茫然，什么发生的事情那是不同的。也许有，我需要启用一些蜂窝特定的权限？

Is there some difference in the way Honeycomb handles its external file system? Is there anything I can change in the db4oDBFullPath() method that would make the two compatible? I'm really at a loss as to what's happening that's different. Maybe there are some Honeycomb-specific permissions that I need to enable?

推荐答案

它被固定在最新发布的：

It's been fixed in the latest release:

http://community.versant.com/博客/ db4o的/ tabid / 197 /的EntryID / 1057 / Default.aspx的

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