Useful Android Libraries

Tomáš Kypta

Libraries

• saves time and work

• it might be painful without libraries

• back-porting new API to older Android versions

• simplifying API

Libraries

• The ideal library?

• “perform one task and perform it well”

• open-source

Dialogs

• Why do we need a library for dialogs?

Dialogs

Dialogs• Let’s simplify

• android-styled-dialogs

Dialogs

• android-styled-dialogs

• backports dialogs in Holo theme

• makes styling and using dialogs a piece of cake

Dialogs

Pull-to-refresh

• ActionBar-PullToRefresh

Swipe-to-dismiss

Swipe-to-dismiss with Undo

Swipe-to-dismiss• Android-SwipeToDismiss

• SwipeToDismissNOA

• backport to Android 2.x

• SwipeToDismissUndoList

• with undo

REST API• Retrofit

• simple REST client for Android and Java

• synchronous

• asynchronous

• observable (RxJava)

Image loaders

• displaying images from web

Image loaders• Volley

• NetworkImageView

• Picasso

• easy to use

• Android-Universal-Image-Loader

• powerful and flexible library

View Injection• getting rid of boilerplate code

• TextView title = (TextView) findViewById(R.id.title);!

• Butter Knife

• @InjectView(R.id.title) TextView title;!

• can’t be used in libraries

Dependency injection

• Dagger

Event bus

• Otto

• Guava based event bus

IntelliJ IDEA plugins

• android-selector-chapek

• generates drawable selectors from appropriately named Android resources

IntelliJ IDEA plugins

• android-butterknife-zelezny

• allows one-click creation of Butterknife view injections

UI debugging• android-grid-wichterle

• app that shows grid overlay

• helps to verify app design

UI debugging

• Scalpel

• debugging tool to uncover the layers under our app

UI niceties

• Crouton

Unit testing

• Roboelectric

• fest-android

• FEST assertions geared toward testing Android

Developing Libraries

Developing Libraries

• jar

• so

• apklib

• aar

Developing Libraries

• How to publish?

• Maven Central Repository

THE END