update list tile

example/lib/example_listtile.dart

@@ -25,7 +25,7 @@ class _ExampleListTileState extends State<ExampleListTile> {
               ASListTile(
                   title: '转单号(UPS)',
                   text: 'DFADN2329TNAGA',
-                  trail: Icon(Icons.ac_unit_rounded),
+                  trail: Placeholder(),
                 ),
                   ASListTile(
                   title: '订单编号',

lib/list_tile/as_list_tile.dart

@@ -59,7 +59,7 @@ class _ASListTileState extends State<ASListTile> {
                   )
                 : widget.text,
           ),
-          widget.trail ?? SizedBox(),
+          SizedBox(width: 20.w,height: 20.w,child: widget.trail ,)
         ],
       ),
     );