I realized that sometimes Eclipse forgets added libraries of a project. The problem is as follows. You can add a library to your Android project via:

Properties → Android → Library

I recently discovered a Dalvik error while performing the building of the project. The error message was something like:

UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Lcom/ ...

and:

I finished my third app and uploaded it to the Android market as Price Navigator. It is a shopping app that makes it possible to get the best price for a product, get additional information and ratings and see the product specifications within the app.

Additionally, the app has a barcode scanner to scan any barcode and get the product information.

If you want to get some screenshots of your running system, you can use ddms (Dalvik Debug Monitor). It is a little, but powerful program that is available within your Android SDK. Just look into the tools folder and start ddms with:

The Battery Power Widget displays the exact battery charge for your Android device. That is much more exact than the default power icon. The widget shows the actual battery charge as a percentage number and changes the background of the widget depending of the charging level.

The Hardware Tester app displays some information about your Android devices like the sensors, the GPS and the battery condition. You can download the app from the Android market or AndroidPit.

In short.

• Get information about the sensors of your device.

I bought the Samsung Galaxy S GT-i9000. This is my first Smartphone and ... yeah ... I am developer.

The same evening I tried to connect the phone with my Ubuntu system to write a little App. And, guess right ... it didn't work.