Java – How to get an array of strings from the firebase live database

databaseReference = FirebaseDatabase.getInstance().getReference("/sample");

databaseReference.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
        Log.d(TAG, "onDataChange: dataSnapshot "+dataSnapshot.getValue());
    }

@Override
    public void onCancelled(@NonNull DatabaseError databaseError) {

}
});

I’m also new to Android app development and Firebase. I’m getting data from the sample node and getting the DataSnapshot value as shown below.

{size=[Small, Large, Ex-Large], type=[Type 1, Type 2], color=[Red, Green, Blue], category=[T-Shirt, Jeans, Sweater]}

Need some expected help and any suggestions would be appreciated.

Thanks

To retrieve the values individually, you can use code like this:

databaseReference.child("category").addValueEventListener(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                   for (int i=0; i<3; i++) {
                      category is an ArrayList you can declare above
                        category.add(dataSnapshot.child(String.valueOf(i)).getValue(String.class));

}

@Override
                public void onCancelled(@NonNull DatabaseError databaseError) { // Do something for this

}
            });

Similarly, you can add values for other nodes in other ArrayLists by changing the value of Childs in this code.