Welcome to the Javadoc reference of the Xposed Framework API. It's meant for module developers who want to understand which classes and methods they can use. The most ones are:

If you're completely new to writing modules, you should read the tutorial first. In case of questions, someone on XDA can probably help you (if you describe exactly what you're trying to do and what you've already tried).

Packages Index:

android.app Contains AndroidAppHelper with various methods for information about the current app.
android.content.res Contains classes that are required for replacing resources.
de.robv.android.xposed Contains the main classes of the Xposed framework.
de.robv.android.xposed.callbacks Contains the base classes for callbacks.
de.robv.android.xposed.services Contains file access services provided by the Xposed framework.