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Head First Android Development 2nd Edition pdf - EduHow : Get Free Stuff
Apr 27, · GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up Source code for the second edition of Head First Android Development. Note: If you're looking for a free download links of Head First Android Development Pdf, epub, docx and torrent then this site is not for you. blogger.com only do ebook promotions online and we does not distribute any free download of ebook on this site. Head First Android Development 2nd Edition pdf What will you learn from this book? If you have an idea for a killer Android app, this fully revised and updated edition will help you build your first working application in a jiffy.
Head first android development 2nd edition pdf download
Everybody wants a smartphone or tablet, and Android devices are hugely popular. All you need is a little Java know-how At the last count, there were over two billion active Android devices worldwide, and that number is growing rapidly.
Android is a comprehensive open source platform based on Linux and championed by Google. A typical Android app is composed of one or more screens. You define what each screen looks like using a layout to define its appearance. Layouts only define the appearance of the app. You define what the app does using one or more activities. An activity is a special Java class that decides which layout to use and tells the app how to respond to the user.
As an example, if a layout includes a button, head first android development 2nd edition pdf download, you need to write Java code in the activity to define what the button should do when you press it. In addition to activities and layouts, Android apps often need extra resources such as image files and application data. You can add any extra files you need to the app.
Android apps are really just a bunch of files in particular directories. When you build your app, all of these files get bundled together, giving you an app you can run on your device. The Android platform is made up of a number of different components. It includes core applications such as Contacts, a set of APIs to help you control what your app looks like and how it behaves, and a whole load of supporting files and libraries.
All you need to begin is some Java knowledge and a great idea for an app. There are just a few things we need to do:. We need to install Android Studio, which includes all the tools you need to develop Android apps.
Java is the most popular language used to develop Android applications. Instead, head first android development 2nd edition pdf download improve speed and battery performance, Android devices use their own optimized formats head first android development 2nd edition pdf download compiled code. All of these come as part of the Android SDK, head first android development 2nd edition pdf download.
The Android Software Development Kit contains the libraries and tools you need to develop Android apps. Here are some of the main points:. In addition to providing you with an editor and access to the tools and libraries in the Android SDK, Android Studio gives you templates you can use to help you create new apps and classes, and it makes it easy to do things such as package your apps and run them.
Before we go any further, you need to install Android Studio on your machine. Whenever you create a new app, you need to create a new project for it. Make sure you have Android Studio open, and follow along with us. The Android Studio welcome screen gives you a number of options. You now need to configure the app by telling Android Studio what you want to call it, what company domain to use, and where you would like to store the files.
Android Studio uses the company domain and application name to form the name of the package that will be used for your app. Then click on the Next button. Some versions of Android Studio may have an extra option asking if you want to include Kotlin support.
You now need to indicate the minimum SDK of Android your app will use. API levels increase with every new version of Android. Every Android app is a collection of screens, and each screen is composed of an activity and a layout. An activity is a single, defined thing that your user can do. You might have an activity to compose an email, take a photo, head first android development 2nd edition pdf download, or find a contact. A layout describes the appearance of the screen.
Layouts are written as XML files and they tell Android how the different screen elements are arranged. The next screen lets you choose among a series of templates you can use to create an activity and layout. So what just happened? The Create New Project wizard created a project for your app, configured to your specifications. You defined which versions of Android the app should be compatible with, and the wizard created all of the files and folders needed for a basic valid app, head first android development 2nd edition pdf download.
When you finish creating your project by going through the wizard, Android Studio automatically displays the project for you. An Android app is really just a bunch of valid files in a particular folder structure, and Android Studio sets all of this up for you when you create a new app. The easiest way of looking at this folder structure is with the explorer in the leftmost column of Android Studio. The explorer contains all of the projects that you currently have open.
To expand or collapse folders, just click on the arrows to the left of the folder icons. These include default image files for icons, styles your app might use, and any common String values your app might want to look up. In the wizard, you specified the minimum SDK version you want your app to be compatible with. Android Studio makes sure your app includes the relevant Android libraries for that version. Android Studio projects use the Gradle build system to compile and deploy apps.
Gradle projects have a standard structure. You view and edit files using the Android Studio editors. Most files get displayed in the code editor, which is just like a text editor, but with extra features such as color coding and code checking. Rather than edit the XML such as that shown on the next pageyou can use the design editor, which allows you to drag GUI components onto your layout, and arrange them how you want.
The code editor and design editor give different views of the same file, so you can switch back and forth between the two. But what you really want to do is see it running, right? You have a couple of options when it comes to running your apps. The first option is to run them on a physical device. The Android emulator allows you to run your app on an Android virtual device AVDwhich behaves just like a physical Android device.
You can set up numerous AVDs, each emulating a different type of device. It looks just like a phone running on your computer. The emulator recreates the exact hardware environment of an Android device: from its CPU and memory through to the sound chips and the video display.
Android Studio launches the emulator for you, head first android development 2nd edition pdf download. The steps are pretty much identical no matter what type of virtual device you want to set up. This is the type of device your AVD will emulate. You can choose a variety of phone, tablet, wear, or TV devices. Choose Phone from the Category menu and Nexus 5X from the list.
Then click the Next button. Next, you need to select a system image. The system image gives head first android development 2nd edition pdf download an installed version of the Android operating system. You can choose the version of Android you want to be on your AVD. As an example, if you want your app to work on a minimum of API level 19, choose a system image for at least API level This screen summarizes the options you chose over the last few screens, and gives you the option of changing them.
Accept the options, and click on the Finish button. You may now close the AVD Manager. Then click OK. It also handles all head first android development 2nd edition pdf download preliminary tasks that are needed for the app to run:. An APK file is an Android application package. The APK file includes the compiled Java files, along with any libraries and resources needed by your app, head first android development 2nd edition pdf download. It can sometimes take quite a while for the emulator to launch with your AVD—often several minutes.
We suggest finding something else to do while waiting for the emulator to start. Like quilting, or cooking a small meal. First, the emulator fires up in a separate window.
The emulator takes a while to load the AVD, but then you see what looks like an actual Android device. When the app gets launched, an activity object is created from MainActivity.
So what do we need to change in order to achieve that? When we built the app, we told Android Studio how to configure it, and the wizard did the rest. The wizard created an activity for us, and also a default layout. Android Studio created an activity for us called MainActivity. The activity specifies what the app does and how it should respond to the user.
The layout specifies what the app looks like. This means that we need to deal with the Android component that controls what the app looks like, so we need to take a closer look at the layout.
As you learned earlier, there are two ways of viewing and editing layout files in Android Studio: through the design editor and through the code editor. This is a type of layout element that tells Android how to display components on the device screen. This is a text property describing the text that should be displayed:. Skip to main content.
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Apr 27, · GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up Source code for the second edition of Head First Android Development. BTW, from AppNee you can get Head First Android Development, 1st Edition & 2nd Edition’s original HD PDF, EPUB and AZW3 from official releases which have been cancelled for a long time. // Table Of Contents // Chapter 1 Getting Started: Diving In; Chapter 2 . Chapter 1. Getting Started: Diving In Android has taken the world by storm. Everybody wants a smartphone or tablet, and Android devices are hugely popular. In this book, we’ll teach - Selection from Head First Android Development, 2nd Edition [Book].
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