private String[] m1Array = new String[]{"Название"};

    private String[] m2Array = new String[]{"текст"};

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main2);
        setTitle("Locale Date");

        Map<String, String> map;
        ArrayList<Map<String, String>> groupDataList = new ArrayList<>();
        for (String name : m1Array) {
            map = new HashMap<>();
            map.put("nameName", name);
            groupDataList.add(map);
        }

        String groupFrom[] = new String[]{"nameName"};
        int groupTo[] = new int[]{android.R.id.text1};

        ArrayList<ArrayList<Map<String, String>>> сhildDataList = new ArrayList<>();

        ArrayList<Map<String, String>> сhildDataItemList = new ArrayList<>();


        сhildDataItemList = new ArrayList<>();
        for (String resource : m2Array) {
            map = new HashMap<>();
            map.put("resourceName", resource);
            сhildDataItemList.add(map);
        }
        сhildDataList.add(сhildDataItemList);


        String childFrom[] = new String[]{"resourceName"};
        int childTo[] = new int[]{android.R.id.text1};

        SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter(
                this, groupDataList,
                android.R.layout.simple_expandable_list_item_1, groupFrom,
                groupTo, сhildDataList, android.R.layout.simple_list_item_1,
                childFrom, childTo);

        ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.expListView);
        expandableListView.setAdapter(adapter);
    }
}`