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Robotium is an open source testing framework for Android applications. It makes it easy to write complex black-box test cases. Test driven development is a methology where tests are written before the actual application.

1. Write a testcase
2. Watch it failing
3. Write the actual source code in you application which enables the test to pass
4. Watch the test passing
5. Go back to step 1

The following video gives you an introduction into Robotium:

I will definitely use Robotium for my future Android projects. It is really worth having a look at it.

There is another interersting video:

Related articles

• Benefits of Test-Driven Development (itripsit.wordpress.com)
• Tutorial 29: Black Box Testing (guru99.com)

Google Android In-App Billing

Google yesterday launched In-app Billing on the Android Market. This feature enables developers to publish apps that use in-app Billing and users can make purchages from within the Android apps.

Google writes:

Android Market In-app Billing is an Android Market service that lets you sell digital content in your applications. You can use the service to sell a wide range of content, including downloadable content such as media files or photos, and virtual content such as game levels or potions. [Source]

In-app Billing enables developers to bring a lot of new apps on the market. I will definitely have a look at it more deeply.

[via Android Developers]

Canonical-Partner Repositories aktivieren:

Dies geschieht unter “System” -> “Systemverwaltung” -> “Synaptic Paketverwalung”. In der Paketverwaltung finden sich die Paketquellen unter dem Menüpunkt “Einstellungen”. In den Einstellungen wechselt man auf den Reiter “Andere Software” und aktiviert dort “Canonical-Partner” bzw. “Canonical-Partner (Quelltext)”.  Nach dem Klick auf “Schließen” werden die Paketlisten neu geladen.

Terminal öffnen und Java 6 JDK installieren:

$ sudo apt-get install sun-java6-jdk

Java Version zur Standardversion auf dem System machen:

$ sudo update-java-alternatives -s java-6-sun

Für das aktuelle Java Development Kit wird der Symlink /usr/lib/jvm/java-6-sun erstellt. Dieser zeigt auf die aktuell installierte Version des JDK.

Installation überprüfen:

user@ubuntu:~# java -version
java version "1.6.0_22"
Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
Java HotSpot(TM) Server VM (build 17.1-b03, mixed mode)

Damit ist die Installation abgeschlossen.

Vielen Dank an Michael Noll für die englische Installationsanleitung, die ich als Vorlage verwendet habe.

Weitere Artikel

• Installing sun-java6 in Ubuntu Maverick Meerkat (twm-kd.com)
• Oracle’s Open Source Java for Mac OS X built (techeye.net)

Here are the JavaFX Links of the Week 1, February 2010:

Jim Weaver sums up the Oracle news this week nice and succinctly: ‘We will invest heavily in JavaFX‘.

The JavaFX tutorial has been updated to include a gentler introduction to data binding and triggers, with a new chapter devoted exclusively to “the basics”. Also, apparently there are plans to include a more advanced article discussing this topic also.

Want tabs in your JavaFX application? Well, today’s your lucky day as toumaille has posted exactly this. His tabbed pane control appears to be well thought out, and may be of use to people out there, certainly until there is an official tab control in JavaFX.

Drew, carrying on his investigation into JavaFX and physics, has put up a JavaFX applet of a very, very simple platform game using real physics.

Exadel released a new version of their JavaFX Plug-In for Eclipse, taking it up to version 1.2.1.

Jim Weaver introduces an interesting visualisation developed in JavaFX by Nik Silver. You can go directly to the visualisation if you are interested in playing with it.

Simon Morris has put up a page that contains all of the demos he wrote whilst writing his book ‘JavaFX in Action’.

Pedro Duque Vieira has written about how he has embedded a JavaFX scene into a Swing application.

Krishna Kishore has created a JavaFX application that grows/animates flowers onto the screen. It’s a rather nice effect, and shows the power of the language given Krishna admits creating this program just to learn the language.

(via jonathangiles.net)

For everybody who likes to learn the Java programming language or who is forced to learn Java I have found a great online tutorial teaching you the essence of Java programming. Specially students should pay attention to this course as it gives a really good introduction to the Java programming language.

The online course can be found here.

Enjoy learning Java and afterwards take a look at JavaFX.

UI Fundamentals for Programmers by Ryan Singer from ChicagoRuby on Vimeo.

(via Smashing Magazine)

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