How To Get All Child Node List Values From Firebase Database?

So this is how my database looks like. Each user can add his 3 best players that are stored in userId/My Players/ path as a Map<'Best Players', Player> as it is shown here:

Solution 1:

In order to display those lists, please use this code:

ListView listView = (ListView) findViewById(R.id.list_view);
ArrayList arrayList = new ArrayList<>();

DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("Users").child(userId).child("My Players").child("Best Players").child("list");
ValueEventListener eventListener = new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
    @SuppressWarnings("unchecked")
    Map<String, Object> map = (Map<String, Object>) dataSnapshot.getValue();
    String firstList = (String) map.get("0");
    String secondList = (String) map.get("1");
    String thirdList = (String) map.get("2");
    arrayList.add(firstList + ", " + secondList + ", " + thirdList);

    arrayAdapter = new ArrayAdapter<>(this, R.layout.list, arrayList);
    listView.setAdapter(arrayAdapter);
}

@Override
public void onCancelled(DatabaseError databaseError) {}
};
ref.addListenerForSingleValueEvent(eventListener);

Solution 2:

you can use code given below: change parameters as per your database

databaseReference.child(Table_Dashboard).orderByChild("title").addValueEventListener(new ValueEventListener() {

        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            spin = new ArrayList<String>();
           // spin.add("Dashboard");


            for (DataSnapshot spinnerSnapshot : dataSnapshot.getChildren()) {
                String areaName = spinnerSnapshot.child("title").getValue(String.class);
                spin.add(areaName);


            }

           // spin.remove("Family Details");

            ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(Dashboard.this, android.R.layout.simple_spinner_item,
                    spin);
            spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

            spinner.setAdapter(spinnerAdapter);
            dismissprogress();
        }


        @Override
        public void onCancelled(DatabaseError databaseError) {
            dismissprogress();
        }
    });