It is ...

... http server for static content.
... tiny. APK size less then 100 Kb.
... as simple as possible. Only essential features implemented.
... free and open. Source code (https://github.com/mvbasov/lWS) released under GPL-3.0.
... personal solution. It is not optimized/tested for many parallel connections and large file transfer.
... network state responsive. Require WiFi connected or tethering enabled. Service stop automatically if network disconnected.

Based on

This application is continue of development Webserver for Android which is open source (https://github.com/bodeme/androidwebserver) and released under GPL-3.0.

What is configurable

* Document root. Path may be entered as text or optional select using OI File Manager. If it is not installed offer to install it.
* Port. May be from 1024 to 65535. Default is 8080
In attempt to set wrong value parameter automatically set to default.

Document root

Document root by default set to application private directory. Example index file automatically created. It is safe configuration. You can place your pages in this directory. But be carefully! If you use Android 5.0 or above and deinstall the application this directory and it's content will be removed.

Security warning

You can change document root to any readable point of file system, but you need to understand what are you doing.
Be careful: you could (suddenly?) create the configuration so way, than anyone on the same WiFi network could access to the data on your device either you don't like it.
All files from document root and below available for reading without any restrictions to anyone who connected to network and known URL of the server.

"Send", "QR code" and "Browser"

After server starts you can press:

* "Browser" button for check server operation in local browser.

* "QR code" to call lWS QR plugin or Barcode Scanner (by ZXing Team) to share URL by QR code. If nothing of both installed offer to install lWS QR plugin

* "Send" to share working server URL to another device by Bluetooth, Android Beam, E-Mail and other way available on your device.

On screen log

The application has no permanent logging. I treat this as redundant functionality. I doing my best to make notification actual all time. On screen log actual only then application visible. Log screen may be cleared after returning from background.