add some config to project and change come simple ui

lib/util/colors_util.dart

@@ -0,0 +1,32 @@
+import 'package:flutter/material.dart';
+
+class ColorsUtil {
+  /// 十六进制颜色，
+  /// hex, 十六进制值，例如：0xffffff,
+  /// alpha, 透明度 [0.0,1.0]
+  static Color hexColor(int hex, {double alpha = 1}) {
+    if (alpha < 0) {
+      alpha = 0;
+    } else if (alpha > 1) {
+      alpha = 1;
+    }
+    return Color.fromRGBO((hex & 0xFF0000) >> 16, (hex & 0x00FF00) >> 8,
+        (hex & 0x0000FF) >> 0, alpha);
+  }
+
+  static Color hexToColor(String s) {
+    // 如果传入的十六进制颜色值不符合要求，返回默认值
+    if (s.length != 7 || int.tryParse(s.substring(1, 7), radix: 16) == null) {
+      s = '#999999';
+    }
+
+    return new Color(int.parse(s.substring(1, 7), radix: 16) + 0xFF000000);
+  }
+
+  static String colorToHex(Color color) {
+    return "#" +
+        color.red.toRadixString(16) +
+        color.green.toRadixString(16) +
+        color.blue.toRadixString(16);
+  }
+}