Clearer Format Firebase Android retrieved data

Question

When I retrieve my data it contains brackets { and unique id such as - JSDHGJDGJJSKA ... I want to make it cleaner and get rid of the brackets for e.g. my output is:

{-JfFQQRYnhiKeuN5ERGX={msg=Monday},-JfFQAhQQWIFAUuV1nD4={msg=this is test}}

I want to get rid of the brackets and the word msg and retrieve just one of the message at random.

I want my output to be if I pick up a random message:

Monday

if I pick up another at random

this is test

Any ideas on how to achieve this will be greatly appreciated.

Please add two code fragments: one of how you add the data and one of how you retrieve it. — Frank van Puffelen, Jan 09 '15 at 22:53
You've posted this question twice now. In both cases, you failed to show how you are retrieving the data. You also need to read [the guide](https://www.firebase.com/docs/web/guide/) which is designed to teach these fundamentals, and to save you (and the people you are leaning on for help) a great deal of time thrashing. Additionally, pick a question. Do you want a random key from the object or an alternative to push ids? — Kato, Jan 12 '15 at 18:27

Kato · Accepted Answer · 2015-01-14T16:41:28.047

3

This will retrieve a random message from the object you've shown in your question.

function getRandomMessage(data) {
   if( !data ) { return null; }
   var keys = Object.keys(data);
   var randomKey = keys[ Math.floor(Math.random()*keys.length) ];
   return data[randomKey];
}

Keep in mind that this assumes you have a small number of records. If you start getting into the thousands, you'll need a more robust solution than just grabbing the entire data set.

edited Jan 14 '15 at 16:41

answered Jan 12 '15 at 18:32

Kato

40,352
6
119
149

this is a great answer but its not android? would the idea be the same? – nothingness Jan 15 '15 at 09:13
i figured out this solution in java using the iterator to move through the index counting i created. – nothingness Jan 29 '15 at 18:33

score 1 · Answer 2 · answered Jan 11 '15 at 22:31

When I used this I was able to retrieve my data for eg. I save as Book -> title: "The book of death" here is the code to retrieve the title:Retrieve data-

String title = (String) snapshot.child("title").getValue();

It worked after I used and I didnt used push since push creates its unique ID and its complex for my level to deal with it so I used:Saving data-

                Map<String, Object> title= new HashMap<String, Object>();
                title.put("title", "This is a working message");
                f.child("Book").updateChildren(title);

and everything worked out. I hope it helps everyone who has having these issues. With update children you can use auto increment for your id.

score 0 · Answer 3 · answered Jan 09 '15 at 21:26

0

are you getting data in string ? and If you are using string then it is easy , you can use the method of replace eg: yourString.replace("a","b")

answered Jan 09 '15 at 21:26

Black

21
6

ah i will try i thought you must use a function from firebase thanks for the advice. will let you know if it works the way i wanted. – nothingness Jan 09 '15 at 22:36
I did try it but it was very difficult to manipulate especially giving the unique id by push i had to replace every single one of the unique id so its a reasonable answer but in this situation i used a different method for simpler usage see my answer below, thanks for help though. – nothingness Jan 12 '15 at 11:31

Clearer Format Firebase Android retrieved data

3 Answers3