Setting custom key when pushing new data to firebase database

Question

Well, I am new to Firebase and I want to have my own keys while pushing new data to database.

Problem:

FireBase.push().setValue(mapped_values);


        

Answer 1

Simple and Fast

 Map<String,Object> taskMap = new HashMap<>();
       taskMap.put("Name", name.getText().toString());
       taskMap.put("km", km.getText().toString());
      // taskMap.put("age", "45");
       taskMap.put("Day", day.getText().toString());
       mDatabaseReference.push().setValue(taskMap);

Answer 2

        String key="1234567sdfsf8";
        //custom object
        User user=new User();
        DatabaseReference mDatabase;
        mDatabase = FirebaseDatabase.getInstance().getReference();
        mDatabase.child("Users").child(key).setValue(user);

Answer 3

You can create a custom key using setValue() even if the root contains many children for example if 'Users' is the root and you want to add users with email as a key it will be like this

firebase.child("firebase url").child("Users").child("user_1 email").setValue(...)

firebase.child("firebase url").child("Users").child("user_2 email").setValue(...)

etc

Hope this helps.

Answer 4

Calling push() will generate a key for you.

If instead you use child(), you can determine they key/path yourself.

ref.child("Victor").setValue("setting custom key when pushing new data to firebase database");

Answer 5

If you are using FirebaseUI :

private static final CollectionReference usersCollection = FirebaseFirestore.getInstance().collection("users");

User user = new User("MyUsername", "MyPictureUrl");
String userKey = "1234567sdfsf8";

usersCollection.document(userKey).set(user); //MAGIC LINE

Answer 6

As an update to the top answer, the Firebase API has been changed and setValue() does not work anymore. Now you must use the set() function instead:

ref.child("Victor").set("setting custom key when pushing new data to firebase database");