how to get the object from firebase in android?
I have user class like this
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;
}
}
i am fetching the user stored on my firebase using the FirebaseRecyclerAdapter like as shown below
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());
}
};
But the issue is is when the firebase key of the user object is like
> -KDY9Pna7XqgFkyCHKFJ
this then its working fine but if the firebase key is like
> c5755a68-69a7-4464-956e-c2f94d9b387d
this unique id then it is giving an error
> com.firebase.client.FirebaseException: Failed to bounce to type
FATAL EXCEPTION: main Process: in.rofr, PID: 12399 com.firebase.client.FirebaseException: Failed to bounce to type at com.firebase.client.DataSnapshot.getValue(DataSnapshot.java:183) at com.firebase.ui.FirebaseRecyclerAdapter.parseSnapshot(FirebaseRecyclerAdapter.java:161) at com.firebase.ui.FirebaseRecyclerAdapter.getItem(FirebaseRecyclerAdapter.java:150) at com.firebase.ui.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:190) at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5465) at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5498) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4735) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4611) at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1988) at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.j ava:1384) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1347) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:574) at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3026) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2903) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3277) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) at android.view.View.layout(View.java: 15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1183) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at androi d.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15689) at android.view.ViewGroup.layout(ViewGroup.java:5040) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2116) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1873) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1084) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5990) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550)
What is the exact issue , i am not getting can anyone help me?
Thanks in advance !!!
Try putting @JsonIgnoreProperties(ignoreUnknown = true) on top of the class like this
@JsonIgnoreProperties(ignoreUnknown = true)
public class UserModel {
}
This might work because Firebase uses Jackson library to serialise/deserialise JSON and the use of @JsonIgnoreProperties(ignoreUnknown = true) is to ignore new properties (properties that are not declared in the class) as stated here https://stackoverflow.com/a/5455563/2331705
链接地址: http://www.djcxy.com/p/93150.html上一篇: Android DiagonalLayout java.lang.IllegalArgumentException：路径必须是凸的