feature：add aliyun router & page

lib/routers/router_handler.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 
 import 'package:flutter_picgo/views/home.dart';
 import 'package:flutter_picgo/views/album_page/album_page.dart';
+import 'package:flutter_picgo/views/pb_setting_page/aliyun_page/aliyun_page.dart';
 import 'package:flutter_picgo/views/pb_setting_page/gitee_page/gitee_page.dart';
 import 'package:flutter_picgo/views/pb_setting_page/gitee_page/gitee_repo_page.dart';
 import 'package:flutter_picgo/views/pb_setting_page/github_page/github_repo_page.dart';
@@ -104,7 +105,13 @@ var pbsettingGiteeRepoHandler = new Handler(
 
 // 七牛图床设置页面
 var pbsettingQiniuHandler = new Handler(
-  handlerFunc: (BuildContext context, Map<String, List<String>> params) => QiniuPage(),
+  handlerFunc: (BuildContext context, Map<String, List<String>> params) =>
+      QiniuPage(),
+);
+
+// 阿里云OSS图床设置页面
+var pbsettingAliyunHandler = new Handler(
+  handlerFunc: (context, parameters) => AliyunPage(),
 );
 
 // picgo设置页面
@@ -117,4 +124,3 @@ var picgosettingHandler = new Handler(
 var picggsettingThemeHandler = new Handler(
   handlerFunc: (context, parameters) => ThemeSettingPage(),
 );
-

lib/routers/routers.dart

@@ -25,6 +25,9 @@ class Routes {
   // --------- qiniu -------------------
   static const String settingPbQiniu = '/setting/pb/qiniu';
   // -----------------------------------
+  // --------- qiniu -------------------
+  static const String settingPbAliyun = '/setting/pb/aliyun';
+  // -----------------------------------
 
   static void configureRoutes(Router router) {
     router.notFoundHandler = notfoundHandler;
@@ -42,5 +45,6 @@ class Routes {
     router.define(settingPbGiteeRepo, handler: pbsettingGiteeRepoHandler);
     router.define(settingPicgoTheme, handler: picggsettingThemeHandler);
     router.define(settingPbQiniu, handler: pbsettingQiniuHandler);
+    router.define(settingPbAliyun, handler: pbsettingAliyunHandler);
   }
 }

lib/views/pb_setting_page/aliyun_page/aliyun_page.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_picgo/resources/pb_type_keys.dart';
+import 'package:flutter_picgo/views/pb_setting_page/aliyun_page/aliyun_page_presenter.dart';
+import 'package:flutter_picgo/views/pb_setting_page/base_pb_page_state.dart';
+
+class AliyunPage extends StatefulWidget {
+  _AliyunPageState createState() => _AliyunPageState();
+}
+
+class _AliyunPageState extends BasePBSettingPageState<AliyunPage>
+    implements AliyunPageContract {
+  @override
+  AppBar get appbar => AppBar(
+        title: Text('阿里云OSS图床'),
+        centerTitle: true,
+      );
+
+  @override
+  String get pbType => PBTypeKeys.aliyun;
+}

lib/views/pb_setting_page/aliyun_page/aliyun_page_presenter.dart

@@ -0,0 +1,7 @@
+abstract class AliyunPageContract {}
+
+class AliyunPagePresenter {
+  AliyunPageContract _view;
+
+  AliyunPagePresenter(this._view);
+}