Core Library Structure

The Android core library follows very closely the structure of the Java core library. It is organized in four main packages:

• processing.core: Basic Processing classes, including PApplet, PGraphics, PImage, and PFont.
• processing.data: Data handling classes and utilities: Table, XML, JSONObject, etc.
• processing.event: All related to event handling: Event, KeyEvent, MouseEvent, and others.
• processing.opengl: The classes implementing the OpenGL renderer: PGraphicsOpenGL, PGraphics2D, PGraphics3D, PShader, PGL.

Differences between versions 3 and 4 of the mode

The version 4.0 of the mode introduces significant changes in the structure of the core library in order to support wallpapers, watch faces, and Cardboard apps.