diff --git a/lib/constants/api.dart b/lib/constants/api.dart
index a5812abe..3628907f 100644
--- a/lib/constants/api.dart
+++ b/lib/constants/api.dart
@@ -202,6 +202,7 @@ class _Community {
 
   ///社区话题：评论
   String get sendAComment => '/user/gambit/comment';
+
 }
 
 class _Upload {
diff --git a/lib/extensions/widget_list_ext.dart b/lib/extensions/widget_list_ext.dart
index 03daa608..1382ca1d 100644
--- a/lib/extensions/widget_list_ext.dart
+++ b/lib/extensions/widget_list_ext.dart
@@ -6,6 +6,7 @@ import 'num_ext.dart';
 
 extension WidgetListExt on List<Widget> {
   List<Widget> sepWidget({Widget separate}) {
+    if (this.isEmpty) return [];
     return List.generate(this.length * 2 - 1, (index) {
       if (index.isEven)
         return this[index ~/ 2];
diff --git a/lib/model/community/hot_topic_model.dart b/lib/model/community/hot_topic_model.dart
new file mode 100644
index 00000000..4bb0f456
--- /dev/null
+++ b/lib/model/community/hot_topic_model.dart
@@ -0,0 +1,18 @@
+class HotTopicModel {
+  int id;
+  String name;
+
+  HotTopicModel({this.id, this.name});
+
+  HotTopicModel.fromJson(Map<String, dynamic> json) {
+    id = json['id'];
+    name = json['name'];
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = new Map<String, dynamic>();
+    data['id'] = this.id;
+    data['name'] = this.name;
+    return data;
+  }
+}
diff --git a/lib/provider/app_provider.dart b/lib/provider/app_provider.dart
index 3f9de533..9d848015 100644
--- a/lib/provider/app_provider.dart
+++ b/lib/provider/app_provider.dart
@@ -1,4 +1,8 @@
 // Flutter imports:
+import 'package:akuCommunity/constants/api.dart';
+import 'package:akuCommunity/model/community/hot_topic_model.dart';
+import 'package:akuCommunity/utils/network/base_model.dart';
+import 'package:akuCommunity/utils/network/net_util.dart';
 import 'package:flutter/material.dart';
 
 // Project imports:
@@ -57,4 +61,13 @@ class AppProvider extends ChangeNotifier {
   removeApplication(AO obj) {
     if (_myApplications.remove(obj)) notifyListeners();
   }
+
+  List<HotTopicModel> _hotTopicModels = [];
+  List<HotTopicModel> get hotTopicModels => _hotTopicModels;
+  updateHotTopicModel() async {
+    BaseModel model = await NetUtil().get(API.community.hotTopic);
+    _hotTopicModels =
+        (model.data as List).map((e) => HotTopicModel.fromJson(e)).toList();
+    notifyListeners();
+  }
 }
diff --git a/lib/ui/community/community_views/add_new_event_page.dart b/lib/ui/community/community_views/add_new_event_page.dart
index b88ec46a..2b4f899c 100644
--- a/lib/ui/community/community_views/add_new_event_page.dart
+++ b/lib/ui/community/community_views/add_new_event_page.dart
@@ -2,12 +2,15 @@
 import 'dart:io';
 
 // Flutter imports:
+import 'package:akuCommunity/model/community/hot_topic_model.dart';
+import 'package:akuCommunity/provider/app_provider.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 // Package imports:
 import 'package:bot_toast/bot_toast.dart';
 import 'package:get/get.dart';
+import 'package:provider/provider.dart';
 import 'package:velocity_x/velocity_x.dart';
 
 // Project imports:
@@ -29,6 +32,7 @@ class _AddNewEventPageState extends State<AddNewEventPage> {
   bool _commentable = true;
   List<File> _files = [];
   TextEditingController _textEditingController = TextEditingController();
+  HotTopicModel _hotTopicModel;
 
   ///发表动态
   _addEvent() async {
@@ -40,8 +44,7 @@ class _AddNewEventPageState extends State<AddNewEventPage> {
     }
 
     Map<String, dynamic> params = {
-      //TODO 话题ID
-      'gambitId': -1,
+      'gambitId': _hotTopicModel == null ? -1 : _hotTopicModel.id,
       'content': content,
       'isComment': _commentable ? 1 : 0,
       'isPublic': 1,
@@ -91,6 +94,46 @@ class _AddNewEventPageState extends State<AddNewEventPage> {
     );
   }
 
+  _pickTopic() {
+    final appProvider = Provider.of<AppProvider>(context);
+    return Wrap(
+      direction: Axis.horizontal,
+      children: [
+        '选择话题：'.text.black.size(34.sp).make(),
+        ...appProvider.hotTopicModels
+            .map((e) => _renderTopic(e))
+            .toList()
+            .sepWidget(separate: 20.wb),
+      ],
+    );
+  }
+
+  Widget _renderTopic(HotTopicModel model) {
+    bool sameModel = model.id == _hotTopicModel?.id ?? -1;
+    return MaterialButton(
+      elevation: 0,
+      color: sameModel ? kPrimaryColor : Colors.white,
+      onPressed: () {
+        _hotTopicModel = model;
+        setState(() {});
+      },
+      child: model.name.text.size(34.sp).black.make(),
+      shape: StadiumBorder(
+        side: BorderSide(
+          color: Color(0xFF999999),
+          width: 1.w,
+        ),
+      ),
+    );
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    final appProvider = Provider.of<AppProvider>(context, listen: false);
+    appProvider.updateHotTopicModel();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -146,7 +189,7 @@ class _AddNewEventPageState extends State<AddNewEventPage> {
           _buildSelectable(),
           Divider(height: 1.w),
           28.hb,
-          //TODO 选择话题
+          _pickTopic(),
         ],
       ).material(color: Colors.white),
     );