Learning Android: Develop Mobile Apps Using Java and Eclipse

Learning Android: Develop Mobile Apps Using Java and Eclipse

Marko Gargenta, Masumi Nakamura

Language: English

Pages: 286

ISBN: 1449319238

Format: PDF / Kindle (mobi) / ePub

Learning Android: Develop Mobile Apps Using Java and Eclipse

Marko Gargenta, Masumi Nakamura

Language: English

Pages: 286

ISBN: 1449319238

Format: PDF / Kindle (mobi) / ePub


Want to build apps for Android devices? This book is the perfect way to master the fundamentals. Written by experts who have taught this mobile platform to hundreds of developers in large organizations and startups alike, this gentle introduction shows experienced object-oriented programmers how to use Android’s basic building blocks to create user interfaces, store data, connect to the network, and more.

Throughout the book, you’ll build a Twitter-like application, adding new features with each chapter. You’ll also create your own toolbox of code patterns to help you program any type of Android application with ease.

  • Become familiar with the Android platform and how it fits into the mobile ecosystem
  • Dive into the Android stack, including its application framework and the Apk application package
  • Learn Android’s building blocks: Activities, Intents, Services, Content Providers, and Broadcast Receivers
  • Create basic Android user interfaces and organize Ui elements in Views and Layouts
  • Build a service that uses a background process to update data in your application

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paused state rather than a destroyed state. The fact that an activity is in a running state doesn’t mean it’s doing much. It could be just sitting there and waiting for user input. Similarly, an activity in a stopped state is not necessarily doing nothing. The state names mostly refer to how active the activity is with respect to user input, in other words, whether an activity is visible, in focus, or not visible at all. 30 | Chapter 4: Main Building Blocks Intents Intents are messages that

tab at the bottom of this window. That will give you the XML source code for this screen, as displayed in this example. Figure 6-3. Graphical Layout mode for status.xml Although we discussed the basic meanings of these XML resources in a previous chapter, there are some details in the code that you should know more about, which we’ll examine in the following section. Important Widget Properties The properties you are most likely to use regularly are: layout_height and layout_width Defines how

(/sdcard/) • The user data partition at (/data/) System Partition Your entire Android operating system is located in the system partition. This is the main partition that contains all your preinstalled applications, system libraries, Android framework, Linux command-line tools, and so on. The system partition is mounted read-only, meaning that you as developer have very little influence over it. As such, this partition is of limited interest to us. The system partition in the Emulator

application, build it, and run it on the emulator (or a physical device, if you want). I’m going to use ~ to refer to your home directory. On Mac OS X, that’s typically something like /Users/marko. On Linux, it would be /home/ marko, and on Windows Vista and 7, C:\Users\marko (in Windows XP, it would be C:\Documents and Settings\marko). Also, I’m going to use Unix-style forward slashes and not Windows backslashes to denote file path separators. So, if you’re on Windows, just change ~ to

for the first time. If Android Project is not an option under File→New, choose Other and look for Android Project in there. 18 | Chapter 3: Quick Start In the new project dialog window, fill out the following: 1. “Project name” is an Eclipse construct. Eclipse organizes everything into projects. A project name should be one word. I like to use the CamelCase naming convention here. Go ahead and type HelloWorld. 2. Next, you need to choose the build target. The build target tells the build tools

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