LVGL 8.2 List

Event callback handler

static lv_obj_t* list1;   
static void event_handler(lv_event_t* e)
{
    
    lv_event_code_t code = lv_event_get_code(e); //  Get the event code generated by the object 
    lv_obj_t* obj = lv_event_get_target(e);  //  Get the object that generated the event 
    if (code == LV_EVENT_CLICKED) {
     // LV_EVENT_CLICKED Event handling 
        LV_LOG_USER("Clicked: %s", lv_list_get_btn_text(list1, obj)); // Print list The text content corresponding to the click 
    }
}

establish List

static void lv_example_list_1(void)
{
    
    /*Create a list*/
    list1 = lv_list_create(lv_scr_act()); // establish List The control object 
    lv_obj_set_size(list1, 180, 220); //  Set size 
    lv_obj_center(list1);  //  centered 
    /*Add buttons to the list*/
    lv_obj_t* btn;
    lv_list_add_text(list1, "File"); //  add to File Text content 
    btn = lv_list_add_btn(list1, LV_SYMBOL_FILE, "New"); // Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_DIRECTORY, "Open");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_SAVE, "Save");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_CLOSE, "Delete");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_EDIT, "Edit");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    lv_list_add_text(list1, "Connectivity");//  Add text content 
    btn = lv_list_add_btn(list1, LV_SYMBOL_BLUETOOTH, "Bluetooth");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_GPS, "Navigation");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_USB, "USB");// Add keys New
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_BATTERY_FULL, "Battery");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    lv_list_add_text(list1, "Exit");//  Add text content 
    btn = lv_list_add_btn(list1, LV_SYMBOL_OK, "Apply");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
    btn = lv_list_add_btn(list1, LV_SYMBOL_CLOSE, "Close");// Add keys 
    lv_obj_add_event_cb(btn, event_handler, LV_EVENT_CLICKED, NULL);// register LV_EVENT_CLICKED event 
}

Running effect