android - ActiveAndroid模型套件附加功能异常

乡亲们！我写了一个Book类，其中包含Chapter对象（一对多关系）。如文档中所述，它实现方法public List章（）。这是Book.java

@Table(name = "Books")
public class Book extends Model implements Serializable {

private static final long serialVersionUID = 1L;

@Column(name = "Name", unique = true, onUniqueConflict = Column.ConflictAction.IGNORE)
public String name;

@Column(name = "Sort")
public int sort;

public Book() {
    super();
}

public Book(String name, int sort) {
    super();
    this.name = name;
    this.sort = sort;
}

public List<Chapter> chapters() {
    return getMany(Chapter.class, "Book");
}

@Override
public String toString() {
    return name;
}
}

在主要活动上，我可以成功获取Chapter对象。但是，我必须将书对象传递给另一个活动，该活动具有一个片段，尽管我获得了该对象的陈述属性（字符串名称和int sort），但在我调用Chapters（）时却引发了异常：

Bundle bundle = getIntent().getExtras();
Book book = (Book) bundle.getSerializable("BOOK");

// This line is executed successfully
Log.d("TAGGED", "Recovered book: " + book.name + " has " + book.sort + " as its sort");

// This is the line that throws an exception
ArrayList<Chapter> chapters = book.chapters();

引发的异常如下：

05-06 15:21:59.701: E/AndroidRuntime(9647): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.hanovit.libraria/com.hanovit.libraria.chapter.ChapterActivity}: java.lang.NullPointerException
05-06 15:21:59.701: E/AndroidRuntime(9647):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
05-06 15:21:59.701: E/AndroidRuntime(9647):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)

05-06 15:21:59.701: E/AndroidRuntime(9647): Caused by: java.lang.NullPointerException
05-06 15:21:59.701: E/AndroidRuntime(9647):     at     com.activeandroid.query.From.getArguments(From.java:207)
05-06 15:21:59.701: E/AndroidRuntime(9647):     at com.activeandroid.query.From.execute(From.java:183)
05-06 15:21:59.701: E/AndroidRuntime(9647):     at com.activeandroid.Model.getMany(Model.java:266)

任何想法有什么问题吗？谢谢！！！

最佳答案

在Github中提交了一个问题，现已修复（https://github.com/melvin7/ActiveAndroid）

另一方面，仅将列的ID放入Extras捆绑包中即可。然后我可以使用Model.load（Book.class，id）获得完整的对象

关于android - ActiveAndroid模型套件附加功能异常，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/16401975/