doc:增加demo预览图

Author: ckken

readme.md

@@ -7,19 +7,28 @@
 + 多语言切换
 + 多主题切换
 + 自动更新检测  
++ firebase 崩溃监控
 
 ## apk 下载
 ![安卓包下载](readme/apk.png)   
 [安卓包下载](https://github.com/efoxTeam/flutter-ui/releases/download/v1.0.2/app-release.apk)
 
+## Demo 预览 
+<img src="readme/1.0.2/1.jpg" width="200" />
+<img src="readme/1.0.2/2.jpg" width="200" />
+<img src="readme/1.0.2/3.jpg" width="200" />
+<img src="readme/1.0.2/4.jpg" width="200" />
+<img src="readme/1.0.2/5.jpg" width="200" />
+<img src="readme/1.0.2/6.jpg" width="200" />
+
 ## 项目相关
 + [apk包历史版本](https://github.com/efoxTeam/flutter-ui/releases)
 + [组件开发进度](readme/widget_progress.md)
 + [贡献PR参考](readme/pr.md)
 
 
 ## 项目交流   
-<img src="readme/qq-qrcode.png" width="300" />
+<img src="readme/qq-qrcode.png" width="200" />