在 shadowsocks-libev 中引入了Key认证方式，能否在shadowsocks-android加入这个认证方式，谢谢！

I am profiling memory on my app usage and was looking at the built-in tremMemory(int level) methods in LruResourceCache and LruBitmapPool to see what their behavior is when I invoke them from my application's onTrimMemory method. The trim memory levels are documented here.

Here is Glide's implementation

https://developer.android.com/guide/topics/ui/notifiers/notifications.html#bundle

Note: If the same app sends four or more notifications and does not specify a grouping, the system automatically groups them together.

As a result, LeakCanary notifications get grouped with the app notifications. We could work around that by setting a distinct group for each LeakCanary notification channel.

本 Issue 仅限作者维护，其他人不要回复，这里不是提问的板块

- 常见问题文档版

//禁止上拉加载：
refreshLayout.setEnableLoadmore(false); 
//使上拉加载具有弹性效果：
refreshLayout.setEnableAutoLoadmore(false); 
//禁止越界拖动：
refreshLayout.setEnableOverScrollDrag(false);

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 6.2.2
• Cross-platform modules: 6.0.1
• Android Runtime: 6.2.0
• iOS Runtime: 6.2.0
• Plugin(s): unrelated

Describe the bug
openFile method of utils module does not preview the