Data not getting saved in Firebase database from android

Question

I am using the new Firebase console. I am trying to save an object to the database but its not getting saved. Following is the code.

DatabaseReference mFirebaseRef = FirebaseDatabase.getInstance().getReference();
mFirebaseRef.push().setValue(object, new DatabaseReference.CompletionListener() {
            @Override
            public void onComplete(DatabaseError databaseError, DatabaseReference reference) {
                if (databaseError != null) {
                    Log.e(TAG, "Failed to write message", databaseError.toException());
                }
            }
        });

the 'object' is created properly. There is no error I am getting and I have checked in debugging that the onComplete method is not getting triggered. Security Rule is also true for write.

Can you show how you create object? Or at least the minimal object with which you can reproduce the problem? — Frank van Puffelen
– Frank van Puffelen, Commented May 26, 2016 at 20:32
object is a java class reference. Object object = new Object(params). The code is not working with Hash Map also. — Tapas Mukherjee
– Tapas Mukherjee, Commented May 27, 2016 at 7:41

Bob Snyder · Accepted Answer · 2016-05-28 23:32:31Z

3

Note that DatabaseReference.CompletionListener fires "when an operation has been acknowledged by the Database servers". Is it possible you did not have a network connection at the time you ran your test? I copied your code and ran it successfully on a phone with object defined like this:

Object object = new String("Test");

I then enabled airplane mode, re-ran the code and observed the behavior you describe. The completion listener did not fire until I disabled airplane mode and a network connection was established.

Example code for checking the status of your network connection is provided in this documentation.

answered May 28, 2016 at 23:32

Bob Snyder

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1 Comment

Tapas Mukherjee Over a year ago

I did not have the Internet permission in manifest. Thanks, It was a silly mistake.

Shaifali Rajput · Accepted Answer · 2017-04-05 11:27:38Z

0

use the below code:

mFirebaseRef.push().setValue(object).addOnCompleteListener(new OnCompleteListener<Void>() 
{
                            @Override
                            public void onComplete(@NonNull Task<Void> task) {
                           if(task.isSuccessful()){
                               // write code for successfull operation
                           }
                            }
                        });
                    }

.push will generate a random key on which your data will stored if you do not use .push it will overwrite on previous stored data.

edited Apr 5, 2017 at 11:27

Shaifali Rajput

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answered Apr 5, 2017 at 9:24

Shashwat Gupta

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