JasonHezz

Do you mind PR? Excellent material design app,I want join it

[Persist password visibility state](https://github.com/material-components/material-components-android/commit/68c77f0a8afdf0814645b9b8f5408576376128e8),it seems to be fixed in **material-components-android**, but the release coming in the next couple of months.

只是需要订阅变化而不需要知道变化内容 ```dart AppStore.store.subscribe ``` 都需要订阅 ```dart AppStore.store.observable ```

https://github.com/google/flutter.widgets/tree/master/packages/visibility_detector

使用 StatefulBuilder

close in favor of BluetoothDevice connected pros

Reopen issue: In IOS, BluetoothDevice pro **connected** always null. Finally I find it. IOS doesn't implement **isConnected** ,**isOn**, **isAvailable** and **state** method. Return is constant. Is this intend?

loadGradientDrawablefails can't get RippleDrawable too

这个问题出现在微信授权登录 http请求获取accessToken 代码报错位置https://github.com/chendongMarch/SocialSdkLibrary/blob/58a5948fa70d4eb91343a42622b3c34108cbeebb/SocialSdkCore/src/main/java/com/zfy/social/core/adapter/impl/DefaultRequestAdapter.java#L100

The new version still had the same issue , spend some time to investigate.According to Chris Banes [AppCompat v23.2 — DayNight](https://medium.com/@chrisbanes/appcompat-v23-2-daynight-d10f90c83e94), the resources for day/night switching should not be restored...