Question

我有这样的用户类

public class User{
int id;
String description;
String shortDescription;
String photo;

public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

public String getShortDescription() {
    return shortDescription;
}

public void setShortDescription(String shortDescription) {
    this.shortDescription = shortDescription;
}

public String getPhoto() {
    return photo;
}

public void setPhoto(String photo) {
    this.photo = photo;
}
}

我使用FirebaseRecyclerAdapter获取存储在我的firebase上的用户，如下所示

 FirebaseRecyclerAdapter<User, UserHolder> adapter =
            new FirebaseRecyclerAdapter<User, UserHolder>(
                    User.class,
                    android.R.layout.two_line_list_item,
                    UserHolder.class,
                    mRef) {
                @Override
                protected void populateViewHolder(UserHolder userHolder, User u, int i) {
                    userHolder.mText.setText(u.getDescription());
                }
            };

但问题是用户对象的firebase密钥是什么时

 > -KDY9Pna7XqgFkyCHKFJ

然后正常工作但是如果 firebase密钥就像

 > c5755a68-69a7-4464-956e-c2f94d9b387d

这个唯一身份然后是错误

> com.firebase.client.FirebaseException: Failed to bounce to type

致命的例外：主要处理：in.rofr，PID：12399 com.firebase.client.FirebaseException：无法跳转到键入在com.firebase.client.DataSnapshot.getValue（DataSnapshot.java:183）在com.firebase.ui.FirebaseRecyclerAdapter.parseSnapshot（FirebaseRecyclerAdapter.java:161）在com.firebase.ui.FirebaseRecyclerAdapter.getItem（FirebaseRecyclerAdapter.java:150）在com.firebase.ui.FirebaseRecyclerAdapter.onBindViewHolder（FirebaseRecyclerAdapter.java:190）在android.support.v7.widget.RecyclerView $ Adapter.onBindViewHolder（RecyclerView.java:5465）在android.support.v7.widget.RecyclerView $ Adapter.bindViewHolder（RecyclerView.java:5498）在android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4735）在android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4611）在android.support.v7.widget.LinearLayoutManager $ LayoutState.next（LinearLayoutManager.java:1988）在android.support.v7.widget.LinearLayoutManager.layoutChunk（LinearLayoutManager.java:1384）在android.support.v7.widget.LinearLayoutManager.fill（LinearLayoutManager.java:1347）在android.support.v7.widget.LinearLayoutManager.onLayoutChildren（LinearLayoutManager.java:574）在android.support.v7.widget.RecyclerView.dispatchLayoutStep2（RecyclerView.java:3026）在android.support.v7.widget.RecyclerView.dispatchLayout（RecyclerView.java:2903）在android.support.v7.widget.RecyclerView.onLayout（RecyclerView.java:3277）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:579）在android.widget.FrameLayout.onLayout（FrameLayout.java:514）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1703）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1557）在android.widget.LinearLayout.onLayout（LinearLayout.java:1466）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.support.v4.widget.DrawerLayout.onLayout（DrawerLayout.java:1183）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:579）在android.widget.FrameLayout.onLayout（FrameLayout.java:514）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1703）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1557）在android.widget.LinearLayout.onLayout（LinearLayout.java:1466）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:579）在android.widget.FrameLayout.onLayout（FrameLayout.java:514）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1703）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1557）在android.widget.LinearLayout.onLayout（LinearLayout.java:1466）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:579）在android.widget.FrameLayout.onLayout（FrameLayout.java:514）在android.view.View.layout（View.java:15689）在android.view.ViewGroup.layout（ViewGroup.java:5040）在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2116）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1873）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1084）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:5990）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:767）在android.view.Choreographer.doCallbacks（Choreographer.java:580）在android.view.Choreographer.doFrame（Choreographer.java:550）

什么是确切问题，我没有得到任何人可以帮助我吗？

提前致谢!!!

Answer 1

尝试将@JsonIgnoreProperties（ignoreUnknown = true）置于类之上

@JsonIgnoreProperties(ignoreUnknown = true)
public class UserModel {

}

这可能有效，因为Firebase使用Jackson库来序列化/反序列化JSON，并且@JsonIgnoreProperties（ignoreUnknown = true）的使用是忽略新属性（未在类中声明的属性），如此处所述https://stackoverflow.com/a/5455563/2331705

如何从android中的firebase获取对象？

1 个答案: