java - 将对象保存到 firebase db 时出现意外错误？ (mClassMapper.access$200(com.google.firebase :firebase-database@@16. 0.5:47))

Question

我得到的错误日志(部分):

mClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)`2019-01-03 11:48:45.070 28064-28064/com.example.xandi.whib E/AndroidRuntime:     at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.serialize(com.google.firebase:firebase-database@@16.0.5:167)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$200(com.google.firebase:firebase-database@@16.0.5:47)
    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.serialize(com.google.firebase:firebase-database@@16.0.5:663)

read: unexpected EOF!

`

这是我正在尝试做的代码:

private void createNewGroup(int i) {
    List<String> userUIDList = new ArrayList<String>();
    userUIDList.add(Util.getUser().getUserUID());
    List<User> users = new ArrayList<>();
    users.add(Util.getUser());
    GroupTempInfo groupTempInfo = new GroupTempInfo(users, false);
    Group group = new Group(UUID.randomUUID().toString(), comment.getSubject().getSubjectUID(), i, Util.getServer().getTempInfo().getNumber(),
            groupTempInfo, "text", new ArrayList<Question>(), userUIDList,
            new ArrayList<Participation>(), false, comment);
    comment.setCommentGroup(group);
    Util.mServerDatabaseRef.child(Util.getServer().getType()).child(Util.getServer().getServerUID()).child("timeline").child("commentList").child(comment.getCommentUID()).child("commentGroup").setValue(group);
    sendNotification();
}

这是我在 db firebase 上的结构。我只是想将一个对象添加到“commmentList” db structure

我在编译时没有收到任何错误，只是在 logcat 上任何人都知道问题出在哪里？

Answer 1

当我试图将 Uri 对象放入我的数据库时，这个错误发生在我身上。我通过放置 Uri 的 String 表示来解决它。