AndroidJSCore allows Android developers to use JavaScript natively in their apps.
AndroidJSCore is an Android Java JNI wrapper around Webkit's JavaScriptCore C library. It is inspired by the Objective-C JavaScriptCore Framework included natively in iOS 7 and above. Being able to natively use JavaScript in an app without requiring the use of JavaScript injection on a bloated, slow, security-constrained WebView is very useful for many types of apps, such as games or platforms that support plugins. However, its use is artificially limited because the framework is only supported on iOS. Most developers want to use technologies that will scale across both major mobile operating systems. AndroidJSCore was designed to support that requirement.
AndroidJSCore is DEPRECATED! All of this functionality and more is now maintained at its permanent home, LiquidCore. Please migrate to this version going forward.
Too see how to use LiquidCore as an AndroidJSCore replacement, read this document.
(For the old documentation, see here, but seriously, it's time to upgrade.)