By Sarah Allen, Vidal Graupera, Lee Lundrigan
Learn the speculation at the back of cross-platform improvement, and positioned the idea into perform with code utilizing the precious details offered during this e-book. With in-depth insurance of improvement and distribution ideas for iPhone, BlackBerry, home windows cellular, and Android, you will study the local method of operating with every one of those systems. With designated assurance of rising frameworks like PhoneGap and Rhomobile, you are going to examine the artwork of making purposes that would run throughout all units. you will even be brought to the code-signing method and the distribution of purposes in the course of the significant software shops, together with learn In movement (BlackBerry), Apple, and Microsoft.
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Extra resources for Pro Smartphone Cross-Platform Development: iPhone, BlackBerry, Windows Mobile, and Android Development and Distribution
Example text
Select Android ➤ Android Project, and click Next (Figure 3–5). Figure 3–5. New Android project You will need to provide a package name for your app. world or whatever you want it to be. Make sure the box labeled Create Activity is checked and give your activity a name such as Hello. An activity is a UI class that allows you to display things on the screen and get user input. We will modify this class to create a simple UI. 39 40 CHAPTER 3: Android If the box labeled Min SDK Version is empty, just click on the lowest SDK version you want to support in the list labeled Build Target.
Figure 3–4. Virtual device details CHAPTER 3: Android Building a Simple Android Application We will build a simple Hello World application and test it in the Android emulator. While there is a native development kit (NDK) that allows you to build code in C or C++, it is only for creating high-performance libraries. Android applications are always written in Java. This short tutorial will introduce you to building an Android application in Java using the Eclipse IDE. The goal of this application is to have the user enter his or her name into a text box, press a button, and have the application greet them by name.
If you don’t want to use Eclipse, there are command-line tools to create a skeleton app, emulator, debugger, and bridge to an actual device. In this chapter, you will learn how to set up your Eclipse development environment, create a simple “Hello World” application, launch the application in the emulator, and then build and install the application on an Android device. We also review Android distribution options are also reviewed at the end of this chapter. Setting Up The Development Environment With Eclipse You will need to install/set up the following components for your development environment to follow the tutorials in this chapter.