ExpandableListView с уникальными кнопками

Не знаю как добавить уникальные кнопки в ExpandableListView. Нужно чтобы каждая кнопка имело свое название и переход. Например:

Horror:
Оно
Чужой
Астрал
Action: 
Мстители
Веном 
Дедпул

и так далее

Прошу помочь

public class DataProvider {
public static HashMap<String, List<String>> getInfo(){
    HashMap<String,List<String>> MoviesDetails = new HashMap<String, List<String>>();
    List<String> Action_Movies = new ArrayList<String>();
    Action_Movies.add("");
    Action_Movies.add("Robocop 2");
    Action_Movies.add("Inception");
    List<String> Romantic_Movies= new ArrayList<String>();
    Romantic_Movies.add("Mean Girls");
    Romantic_Movies.add("Feilure to Launch");
    List<String> Horror_Movies= new ArrayList<String>();
    Horror_Movies.add("The Conjuring");
    Horror_Movies.add("It");
    Horror_Movies.add("Sinister");
    List<String> Comedy_Movies= new ArrayList<String>();
    Comedy_Movies.add("Ride Along");
    Comedy_Movies.add("This is the End");
    MoviesDetails.put("Action Movies",Action_Movies);
    MoviesDetails.put("Romantic Movies", Romantic_Movies);
    MoviesDetails.put("Horror Movies",Horror_Movies);
    MoviesDetails.put("Comedy Movies",Comedy_Movies);
    return MoviesDetails;
}
}

Adapter Java

public class MoviesAdaptor extends BaseExpandableListAdapter {
private Context ctx;
private HashMap<String, List<String>> Movies_Category;
private List<String> Movies_List;
public MoviesAdaptor(Context ctx, HashMap<String, List<String>> Movies_Category, List<String> Movies_List) {
    this.ctx = ctx;
    this.Movies_Category = Movies_Category;
    this.Movies_List = Movies_List;
}
@Override
public int getGroupCount() {
    return Movies_List.size();
}
@Override
public int getChildrenCount(int arg0) {
    return Movies_Category.get(Movies_List.get(arg0)).size();
}
@Override
public Object getGroup(int arg0) {
    return Movies_List.get(arg0);
}
@Override
public Object getChild(int parent, int child) {
    return Movies_Category.get(Movies_List.get(parent)).get(child);
}
@Override
public long getGroupId(int arg0) {
    return arg0;
}
@Override
public long getChildId(int parent, int child) {
    return child;
}
@Override
public boolean hasStableIds() {
    return false;
}
@Override
public View getGroupView(int parent, boolean isExpanded, View convertView, ViewGroup parentView) {
    String group_title = (String) getGroup(parent);
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.parent_layout, parentView, false);
    }
    TextView parent_textview = convertView.findViewById(R.id.parent_txt);
    parent_textview.setTypeface(null, Typeface.BOLD);
    parent_textview.setText(group_title);
    return convertView;
}
@Override
public View getChildView(int parent, int child, boolean LastChild, View convertView, ViewGroup parentView) {
    String child_title = (String) getChild(parent, child);
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.child_layout, parentView, false);
    }
    TextView child_textview = convertView.findViewById(R.id.child_txt);
    child_textview.setText(child_title);
    return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}
}

MainActivity

public class MainActivity extends Activity {
HashMap<String, List<String>>Movies_category;
List<String>Movies_List;
ExpandableListView Exp_list;
MoviesAdaptor adaptor;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Exp_list = findViewById(R.id.exp_list);
    Movies_category = DataProvider.getInfo();
    Movies_List = new ArrayList<String>(Movies_category.keySet());
    adaptor = new MoviesAdaptor(this,Movies_category,Movies_List);
    Exp_list.setAdapter(adaptor);
}
}