BoxDecoration

[jancywen]

════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown building MeMainPage(dirty, state: _MeMainPageState#8a1a6):
Cannot provide both a color and a decoration
To provide both, use "decoration: BoxDecoration(color: color)".
'package:flutter/src/widgets/container.dart':
Failed assertion: line 285 pos 15: 'color == null || decoration == null'

[jancywen]

Container 设置背景颜色，decoration中的color不可与Container的color属性同时设置，设置了decoration后，Container的color必须去掉。定义方式与Container的color定义方式一致。