update asserts

examples/widgets/dropdown/lv_example_dropdown_1.c

@@ -0,0 +1,35 @@
+#include "../../../lvgl.h"
+#include <stdio.h>
+#if LV_USE_DROPDOWN
+
+
+static void event_handler(lv_obj_t * obj, lv_event_t event)
+{
+    if(event == LV_EVENT_VALUE_CHANGED) {
+        char buf[32];
+        lv_dropdown_get_selected_str(obj, buf, sizeof(buf));
+        printf("Option: %s\n", buf);
+    }
+}
+
+void lv_example_dropdown_1(void)
+{
+
+    /*Create a normal drop down list*/
+    lv_obj_t * dd = lv_dropdown_create(lv_scr_act(), NULL);
+    lv_dropdown_set_options(dd, "Apple\n"
+                                "Banana\n"
+                                "Orange\n"
+                                "Cherry\n"
+                                "Grape\n"
+                                "Raspberry\n"
+                                "Melon\n"
+                                "Orange\n"
+                                "Lemon\n"
+                                "Nuts");
+
+    lv_obj_align(dd, NULL, LV_ALIGN_IN_TOP_MID, 0, 20);
+    lv_obj_add_event_cb(dd, event_handler, NULL);
+}
+
+#endif