Нужно изменить цвет значка SearchIcon , и убрать нижнюю линию у SearchView

 private SearchView search;
    private MyListAdapter listAdapter;
    private ExpandableListView myList;
    private ArrayList<Continent> continentList = new ArrayList<Continent>();
    private SlidrInterface slidr;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_2);
        slidr = Slidr.attach(this);//sliding
        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        search = (SearchView) findViewById(R.id.search);
        search.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
        search.setIconifiedByDefault(true);
        search.setOnQueryTextListener(this);
        search.setOnCloseListener(this);
        //display the list
        displayList();
        //expand all Groups
        expandAll();}
  @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }