How to display records from a Firebase database using HashMap with Android?

I am developing an app in which the users can have multiple lists. My Firebase database looks like this:

The model that i use is this:

public class UserModel {
    private String userId;
    private String userName;
    private String userEmail;
    private HashMap lists;

    public UserModel() {}

    public void setUserId(String userId) {this.userId = userId;}
    public String getUserId() {return userId;}

    public void setUserName(String userName) {this.userName = userName;}
    public String getUserName() {return userName;}

    public void setUserEmail(String userEmail) {this.userEmail = userEmail;}
    public String getUserEmail() {return userEmail;}

    public void setLists(HashMap lists) {this.lists = lists;}
    public HashMap getLists() {return lists;}
}
,>,>,>

For displaying the lists, i use a FirebaseListAdapter and a ListView. If i use the code like this:

DatabaseReference listsRef = usersRef.child(userId).child("lists");
adapter = new FirebaseListAdapter>(MainActivity.this, Map.class, android.R.layout.simple_list_item_1, listsRef) {
    @Override
    protected void populateView(View v, Map map, int position) {
        for (Map.Entry entry : map.entrySet()) {
            Log.d(TAG, entry.getKey() + "/" + entry.getValue());
        }
    }                
    ListView listView = (ListView) findViewById(R.id.list_view);
    listView.setAdapter(adapter);
}    
,>,>

I get this error: Error:(221, 31) error: no suitable constructor found for FirebaseListAdapter

All i want to do, is to display the key and the value using HashMap. Where am i wrong?

Thanks in advance!

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How to display records from a Firebase database using HashMap with Android?

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