Realtime database CRUD Error (android stuido / firebase)

Question

If I open my app at the instant he close and tell me on my test device and the app crash.

Here is my LOGCAT error codes:

      05-16 13:34:02.324 25606-25606/? E/Zygote: v2
      05-16 13:34:02.325 25606-25606/? E/Zygote: accessInfo : 0
      05-16 13:34:04.368 25606-25606/studenty.language.android 
      E/AndroidRuntime: FATAL EXCEPTION: main
      Process: studenty.language.android, PID: 25606
      com.google.firebase.database.DatabaseException: Class 
      studenty.language.android.User does not define a no-argument 
      constructor. If you are using ProGuard, make sure these constructors 
      are not stripped.
      at com.google.android.gms.internal.firebase_database.zzku.zza(Unknown 
      Source)
      at com.google.android.gms.internal.firebase_database.zzkt.zzb(Unknown 
      Source)
      at com.google.android.gms.internal.firebase_database.zzkt.zza(Unknown 
      Source)
      at com.google.firebase.database.DataSnapshot.getValue(Unknown Source)
      at studenty.language.android.MainActivity$2.onDataChange 
      (MainActivity.java:81)
      at com.google.android.gms.internal.firebase_database.zzfc.zza(Unknown 
      Source)
      at com.google.android.gms.internal.firebase_database.zzgx.zzdr(Unknown 
      Source)
      at com.google.android.gms.internal.firebase_database.zzhd.run(Unknown 
      Source)
      at android.os.Handler.handleCallback(Handler.java:751)
      at android.os.Handler.dispatchMessage(Handler.java:95)
      at android.os.Looper.loop(Looper.java:154)
      at android.app.ActivityThread.main(ActivityThread.java:6776)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run 
      (ZygoteInit.java:1518)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)

Class user code:

package studenty.language.android;


public class User {
private String id;
private String name;

public User(String id) {
    this.id = id;
}

public User(String id, String name) {
    this.id = id;
    this.name = name;
}

public String getId() {
    return id;
}

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

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

}

It´s because i need to add a default no-argument, but how i can create this default no-argument and how i can implement it on my class User code?

`Class studenty.language.android.User does not define a no-argument constructor. If you are using ProGuard, make sure these constructors are not stripped` Ring any bell? — ADM, May 16 '18 at 11:45
if I say you the true xD... not because im new in firebase and programming any tip? — Rene, May 16 '18 at 11:47
I think need to define arguments for the class User right? but how i do that? — Rene, May 16 '18 at 11:49
Just create a default constructor in `User` class. You can have multiple constructors in a class . — ADM, May 16 '18 at 11:50
simply update this`public User(String id) { this.id = id; }` to this `public User() { }` — , May 16 '18 at 12:53

Realtime database CRUD Error (android stuido / firebase)

0 Answers0