Android Lab 4 – User Input, Variables, and Operations

In this lab, I build upon the previous labs and incorporate additional options for the controls, use radio buttons, and use Java and if-else statements to control logic in this weight conversion application. Changing the application icon is also discussed. Our apps continue to progress and build upon previous lessons. We can begin to see more sophistication and capabilities as new features and tools are introduced through these labs. The full set of labs can be found on my Android Boot Camp page on my website.

Practice: An Android App with Button

In this exercise, I build a Youth Hostel App that displays information about a given youth hostel. I couldn’t resist finding a hostel in Modena, Italy as I can’t wait to return to my favorite place to visit (well, besides Disney World!). The Italian countryside is probably the most picturesque places I have seen on this planet. This Android app is a continuation of my post from last week, so consider this practice if you’ve been following along. The next lesson on the docket includes input from the user, so stay tuned.


Building my 2nd Android App

Lab 2: Simplify! The Android User Interface


In this 2nd lab, an application will be developed that includes a button action to move from the main screen to a 2nd screen. Widgets such as TextView, buttons, and ImageView will be used to build the application in conjunction with the strings.xml file and Translations Editor. To do this, a 2nd activity will be created that includes the editing of a new Java class file. To follow along with this lab, an image file is used that can be downloaded. The lab will be capped off by testing our new recipe app in the virtual emulator.

If you’re tuning in for the first time, you can start from the beginning on my Android Boot Camp page.