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Welcome to the PlayN Community Wiki!

Please feel free to edit anything you like here if you feel it makes it better. I think you need a github account in order to edit, and then away you go :-)

I've always thought that documentation should be iterative and fun. This is the best example of documentation I've seen on a complex topic. So feel free to add personality.

Index

These sections should be listed by topic. It's intended to be a very long scrolling page, which is easier to navigate than many hidden subpages.

Here is also an index of the official PlayN Wiki.

Simple Tasks

Changing Screensize [forum]
Loading custom resources and a discussion about storage and Autobean [forum]
Exiting the app [forum] more
Loading custom fonts [stackoverflow]

GameLoop/Layers advice

Game Loop Explanation before the Clock was added [official]
Game.Default and Clock when the Clock was added [forum] Just note that the updateRate taken by Game.Default is really an updateInterval and its units are in milliseconds, not a rate in times per second.
Efficient update strategy [forum]
Sprite Sheets [forum]
This answer explains efficient rendering, make sure you understand the performance test mentioned in the comments, for which clicking on the stats pane increases the stress. [stackoverflow]
Optimising ImmediateLayer drawing on Android for HTC desire [stackoverflow].
Understanding 2 thread rendering for game development on android in general. Not PlayN specific [stackoverflow]
History of smooth/fluent framerate issues [forum]

TriplePlay, and layout issues.

I am the great cornholio

Tripleplay Animator Guide, basically you shouldn't be writing your own scheduler. [guide]
Tripleplay UI, this guide is a work in progress. [guide]
Multi font layouts, and source. [forum]
Animating widgets with Migraine and MigLayout [link]
Image scaling with UI [forum]

Physics

Box2D to use JBox2D
Pea sample code and [PeaWorld|https://github.com/playn/playn-samples/blob/master/physics/core/src/main/java/physics/core/PeaWorld.java]. Note that unit of box2d expects is seconds. Millis will render your simulation static with incorrect levels of linear dampening.