EDS (Encrypted Data Store) is a virtual disk encryption software for Android which allows you to store your files in an encrypted container. EDS Lite is an open source edition of EDS. Visit EDS web site to learn about EDS features and capabilities.
You can download and install the latest version from Google Play.
Please support the development of the open source version of EDS by making a donation: 
Download and extract NDK v13b. Clone the project to a local folder. In the root folder of the project create the local.properties file and add the following line: ndk.dir=/path/to/ndk-bundle. Replace /path/to/ndk-bundle with the actual path. Import the project to Android Studio. Select Build->Build APK.
GPLv2+