tabview for little vGL

void tabview_demo(void)
{
    /*Create a Tab view object*/
    lv_obj_t* tabview;
    tabview = lv_tabview_create(lv_scr_act(), NULL);

    /*Add 3 tabs (the tabs are page (lv_page) and can be scrolled*/
    lv_obj_t* tab1 = lv_tabview_add_tab(tabview, "Tab 1");
    lv_obj_t* tab2 = lv_tabview_add_tab(tabview, "Tab 2");
    lv_obj_t* tab3 = lv_tabview_add_tab(tabview, "Tab 3");

    lv_tabview_set_btns_hidden(tabview, true);  //隐藏tabview按钮
    /*Add content to the tabs*/
    lv_obj_t* label = lv_label_create(tab1, NULL);
    lv_label_set_text(label, "This the first tab\n\n"
        "If the content\n"
        "of a tab\n"
        "become too long\n"
        "the it \n"
        "automatically\n"
        "become\n"
        "scrollable.");
    label = lv_label_create(tab2, NULL);
    lv_label_set_text(label, "second Tab");

    label = lv_label_create(tab3, NULL);
    lv_label_set_text(label, "Third tab");

}