How to add new child in Firebase database Android

Question

I\'m trying to add a new child using the DatabaseReference in my Firebase Android app. I\'m doing:

DatabaseReference mDatabase = F         


        

Answer 1

You'll need to call push() to generate a unique key for the new data:

DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference() 
mDatabase.push().setValue(1);

This will append the new value at the end of the list.

By combining the push() and child() methods, you can create multiple lists of children in the database:

mDatabase.child("numbers").push().setValue(1);
mDatabase.child("numbers").push().setValue(53);
mDatabase.child("numbers").push().setValue(42);

mDatabase.child("letters").push().setValue("a");
mDatabase.child("letters").push().setValue("z");
mDatabase.child("letters").push().setValue("c");

See the section append to a list of data in the Firebase documentation.