feat(example) add style examples

examples/styles/lv_example_style_12.c

@@ -0,0 +1,24 @@
+#include "../lv_examples.h"
+#if LV_BUILD_EXAMPLES && LV_USE_IMG
+
+/**
+ * Local styles
+ */
+void lv_example_style_12(void)
+{
+    static lv_style_t style;
+    lv_style_init(&style);
+    lv_style_set_bg_color(&style, lv_palette_main(LV_PALETTE_GREEN));
+    lv_style_set_border_color(&style, lv_palette_lighten(LV_PALETTE_GREEN, 3));
+    lv_style_set_border_width(&style, 3);
+
+    lv_obj_t * obj = lv_obj_create(lv_scr_act());
+    lv_obj_add_style(obj, &style, 0);
+
+    /*Overwrite the background color locally*/
+    lv_obj_set_style_bg_color(obj,lv_palette_main(LV_PALETTE_ORANGE), LV_PART_MAIN);
+
+    lv_obj_center(obj);
+}
+
+#endif