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 = newArrayList<>();

DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("Users").child(userId).child("My Players").child("Best Players").child("list");
ValueEventListener eventListener = newValueEventListener() {
@OverridepublicvoidonDataChange(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 = newArrayAdapter<>(this, R.layout.list, arrayList);
    listView.setAdapter(arrayAdapter);
}

@OverridepublicvoidonCancelled(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(newValueEventListener() {

        @OverridepublicvoidonDataChange(DataSnapshot dataSnapshot) {
            spin = newArrayList<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 = newArrayAdapter<String>(Dashboard.this, android.R.layout.simple_spinner_item,
                    spin);
            spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

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


        @OverridepublicvoidonCancelled(DatabaseError databaseError) {
            dismissprogress();
        }
    });