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ANDROID FirebaseDatabase: cannot save object

I Failed to add the object to the firebase database database. I tried the following code. But when this code executes

db.child("Users").setValue(person);

my application crashes

 public class Person{ String fname; String lname; Person() {} Person(String fname,String lname) { this.fname = fname; this.lname = lname; } public String getFname() { return fname; } public String getLname() { return lname; } }

Here is ERROR.

11-20 15: 34: 57.762 2752-2752 / shazdroid.com.surveyapp E / AndroidRuntime: FATAL EXCEPTION: main Process: shazdroid.com.surveyapp, PID: 2752 com.google.firebase.database.DatabaseException: conflicting getters found for Name: isChangingConfigurations at com.google.android.gms.internal.zzamy $ zza. (Unknown source) at com.google.android.gms.internal.zzamy.zzj (Unknown source) at com.google.android.gms.internal.zzamy.zzca (Unknown source) at com.google.android.gms.internal .zzamy.zzch (Unknown source) at com.google.android.gms.internal.zzamy $ zza.zzci (Unknown source) at com.google.android.gms.internal.zzamy.zzca (Unknown source at com.google .android.gms.internal.zzamy.zzbz (Unknown source) at com.google.firebase.database.DatabaseReference.zza (Unknown source) at com.google.firebase.database.DatabaseReference.setValue (Unknown Source) at shazdroid.com.surveyapp.AddMember.savePerson (AddMember.java:207 ) at shazdroid.com.surveyapp.AddMember.access $ 000 (AddMember.java:37) at shazdroid.com.surveyapp.AddMember $ 6.onClick (AddMember.java:193) at android.view.View.performClick (View.java: 5610) on android.view.View $ PerformClick.run (View.java:22260) on android.os.Handler.handleCallback (Handler.java:751) on android.os.Handler.dispatchMessage (Handler.java:95) on android.os .Looper.loop (Looper.java:154) at android.app.ActivityThread.main (ActivityThread.java:6077) in java.lang.reflect.Method.invoke (native method) in com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main (Zygot eInit.java:755)

This is how I save the object.

  private void savePerson() { suc.show(); Person person = new Person("shahbaz","ansari"); db.child("User").setValue(person) .addOnCompleteListener(AddMember.this, new OnCompleteListener<Void>() { @Override public void onComplete(@NonNull Task<Void> task) { if(task.isSuccessful()) { suc.dismissWithAnimation(); suc = new SweetAlertDialog(AddMember.this,SweetAlertDialog.SUCCESS_TYPE); suc.setTitleText("Successful"); suc.setContentText("Saving data successful"); suc.setConfirmText("OK"); suc.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() { @Override public void onClick(SweetAlertDialog sweetAlertDialog) { sweetAlertDialog.dismissWithAnimation(); } }).show(); }else{ suc.dismissWithAnimation(); suc = new SweetAlertDialog(AddMember.this,SweetAlertDialog.ERROR_TYPE); suc.setTitleText("Failed"); suc.setContentText("Failed to save data"); suc.setConfirmText("Try Again"); suc.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() { @Override public void onClick(SweetAlertDialog sweetAlertDialog) { savePerson(); } }); suc.setCancelText("cancle"); suc.setCancelClickListener(new SweetAlertDialog.OnSweetClickListener() { @Override public void onClick(SweetAlertDialog sweetAlertDialog) { sweetAlertDialog.dismissWithAnimation(); } }).show(); } } });
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1 answer

The stack trace refers to isChangingConfigurations , which is the name of the Activity method. This probably means that you declared the Person class to be an inner activity class. When Firebase serializes Person , it also tries to serialize the private Activity class and does not work.

Move the Person declaration to the package level or modify the declaration to make it a static inner class: public static class Person .

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Source: https://habr.com/ru/post/1012500/

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