How to get the Child in Firebase Android?

Question

I'm trying to perform login operation in my app using firebase my Users node is something like:

mUserCompounds.orderByChild("email").equalTo("test@gmail.com").addValueEventListener(new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {
                        System.out.println(dataSnapshot.getChildrenCount());                        }

                    @Override
                    public void onCancelled(DatabaseError databaseError) {

                    }
                });

i want to get that complete object with which i have matched the name. so that

i can also compare password etc. Thanks for help.

https://stackoverflow.com/questions/38017765/retrieving-child-value-firebase refer this — Gowthaman M, Oct 01 '17 at 13:27
What is the problem with the code you shared? What does it do? What did you expect it to do? — Frank van Puffelen, Oct 01 '17 at 15:10
dear i want to get the test object so that i can use image, pointsTotal and other values. All i know about User is his email and password on the basic of email and password i want to fetch complete object. — Nouman Ch, Oct 01 '17 at 18:06
your question is not clear. Do you want to get the values of the node "test" in order to compare them with other values? — Lucem, Oct 02 '17 at 11:28
@Lucem dear i have two values email and password on the basis of this info i want to get the complete record that is "test" node and all its child values. — Nouman Ch, Oct 02 '17 at 12:56

score 2 · Accepted Answer · edited Oct 20 '17 at 11:11

2

Visit the Firebase documentation enter link description here

read firebase data Also always push data to firebase with Pushkey so you can get whole object.

edited Oct 20 '17 at 11:11

Nouman Ch

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answered Oct 01 '17 at 15:13

Jawad Hassan Soomro

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i have a key named as test under Users node. – Nouman Ch Oct 01 '17 at 17:59
No you have to push object using push key. – Jawad Hassan Soomro Oct 02 '17 at 18:54
code example : `DatabaseReference postsRef = ref.child("posts"); DatabaseReference newPostRef = postsRef.push(); newPostRef.setValue(new Post("gracehop", "Announcing COBOL, a New Programming Language")); // We can also chain the two calls together postsRef.push().setValue(new Post("alanisawesome", "The Turing Machine"));` – Jawad Hassan Soomro Oct 02 '17 at 19:00

score 1 · Answer 2 · answered Dec 05 '17 at 12:26

this is pretty simple

mUserCompounds.orderByChild("email").equalTo("test@gmail.com").addValueEventListener(new ValueEventListener() {
                        @Override
                        public void onDataChange(DataSnapshot dataSnapshot) {

                        Log.i("your tag",""+dataSnapshot.toString());
    }

                        @Override
                        public void onCancelled(DatabaseError databaseError) {

                        }
                    });

score 1 · Answer 3 · answered Dec 05 '17 at 12:40

First make a pojo class of User data .

Class User {
 String about;
 String email;
 String image;
 String name;
 String password;
 String pointsTotal;
 String totalTasksDone;
}

Make getter setters and define constructors.

mUserCompounds.orderByChild("email").equalTo("test@gmail.com").addValueEventListener(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {
                    if (dataSnapshot.exists()) {
                         //User already exists
                         User user1 = dataSnapshot.getValue(User.class); 
                         System.out.println(user1.getPassword());
                       }
                  }

                @Override
                public void onCancelled(DatabaseError databaseError) {

                }
            });

How to get the Child in Firebase Android?

3 Answers3