By Wei-Meng Lee
Understand Android OS for either telephone and pill programming
This fast moving creation to the latest liberate of Android OS provides aspiring cellular app builders what they should understand to application for today's most well-liked Android smartphones and drugs. Android four OS is, for the 1st time, a unmarried answer for either smartphones and pills, so for those who grasp the data during this beneficial consultant, you'll be good in your technique to profitable improvement for either units. From utilizing actions and intents and growing wealthy consumer interfaces to operating with SMS, messaging APIs, and the Android SDK, what you wish is right here. * offers transparent directions sponsored via real-world programming examples* starts with the fundamentals and covers every little thing Android four builders want to know for either smartphones and drugs* Explains the best way to customise actions and intents, create wealthy person interfaces, and deal with information* is helping you're employed with SMS and messaging APIs, the Android SDK, and utilizing location-based companies* info tips on how to package deal and submit your purposes to the Android Market
Beginning Android four program Development pares down the main crucial steps you want to recognize so that you can begin developing Android functions today.
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Extra resources for Beginning Android 4 Application Development
If you're unfamiliar with editing commands, Chapter 8 discusses all those available. Analyzing your first program While you can type in and run this program without ever knowing how it works, we've provided a brief explanation here. The first line you entered gives the program the name MyFirst. This is an optional statement, but it's a good practice to include it. The next three lines declare some variables, with the word var signaling the start of variable declarations. A and B are declared to be of type Integer; that is, they can contain whole numbers, such as 52,--421, 0, 32,283, and so on.
Subroutines These are separately named sets of irtstructions that can be executed anywhere in the program just by referencing the name. N ow we'll take a look at how to use these elements in Turbo Pascal. Data types When you write a program, you're working with information that generally falls into one of five basic types: integers, real numbers, characters and strings, Boolean, and pointers. Integers are the whole numbers you learned to count with (1, 5, -21, and 752, for example). 579x1024). These are also sometimes known as floating-point numbers.
Z, A ... Z, or _). The rest of an identifier can consist of letters, underscores, and/or digits (0 ... 9); no other characters are allowed. Chapter 2, Programming in Turbo Pascal 37 • Identifiers are case-insensitive, which means that lowercase letters (a .. z) are considered the same as uppercase letters (A .. Z). For example, the identifiers indx, Indx, and INDX are identical. • Identifiers can be of any length, but only the first 63 characters are significant. Operators Once you get your data into the program (and into your variables), you'll probably want to manipulate it somehow, using the operators available to you.