Android Question Firebase Realtimedatabase

[Alan dos Santos]

I'm following this tutorial here, but I have a little difficulty.

Whenever I click the button to send the message it returns me that error.

java.lang.ClassCastException: de.donmanfred.QueryWrapper cannot be cast to de.donmanfred.DatabaseReferenceWrapper

Sorry my google translate s2

Sub btn_sendMessage_Click

    messageref.Initialize("messages", roomref.Child(childOftheOnlyRoom & "/messages") ,"message")
  
    Dim messagesitems As Map = CreateMap("senderId": auth.CurrentUser.Uid, "text": "Test Message 1")
  
   messageref.push.setValue(messagesitems,"rooms","messages")
  
End Sub

 

[Alexander Stolte]

try this, because since the last Update of the lib. the child does not work as before. For every new reference initialize without .child.

messagesref.Initialize("room",realtime.getReference2("/rooms/roomid/messages"),"room")

 

[Alexander Stolte]

I Update tomorrow the Tutorial.

 

[Alan dos Santos]

Its worked, now I will work on a way to display the messages, thank you very much for the patience man, I will wait for the update

 

[Alexander Stolte]

no Problem, in the two other Tutorials i had Change it, but this i had forgot.

 

[DonManfred]

Please nmote that some of the methods does NOT retrurn a new reference but return a QUERY.
If you want to use the query as object then you need to use a Query type....

java.lang.ClassCastException: de.donmanfred.QueryWrapper cannot be cast to de.donmanfred.DatabaseReferenceWrapper

The result of the method you are using is a Query, not a DatabaseReference.

 

[Alexander Stolte]

yeah, but my code did worked before the update, but now is it cleaner.

I updated my Tutorial.