Java Programming for Android Developers for Dummies by Barry Burd

By Barry Burd

Android is in all places. In mid-2013, Android ran on fifty three percentage of all
smartphones within the usa and on eighty percentage of all smartphones
worldwide.1 In a research that spans the Americas, Europe, Asia, and the Middle
East, GlobalWebIndex reviews that Android capsules outnumber iPads by means of 34
million.2 greater than 1000000 apps can be found for obtain on the Google
Play shop (double the variety of apps that have been to be had in might 2012).3
And greater than nine million builders write code utilizing Java, the language that
powers Android devices.4

If you learn this publication in a public position (on a commuter educate, on the beach,
or at the dance ground on the Coyote gruesome saloon, for example), you could read
proudly, with a chip in your shoulder and together with your head held excessive. Android
is sizzling stuff, and you’re cool simply because you’re interpreting approximately it.

How This e-book Is Organized:

Part I: Getting begun with Java Programming for Android Developers

Part II: Writing your personal Java Programs

Part III: operating with the large photo: Object-Oriented Programming

Part IV: Powering Android with Java Code

Part V: The a part of Tens

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Additional info for Java Programming for Android Developers for Dummies

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Within the Java branch, select the Installed JREs subbranch. 4. Look at the list of Java versions (Installed JREs) in the main body of the Preferences dialog box. In the list, each version of Java has a check box. Eclipse uses the version whose box is checked. If the checked version isn’t your preferred version (for example, if it isn’t version 6 or later), you have to make changes. 5. If your preferred version of Java appears in the Installed JREs list, select that version’s check box. 6. If your preferred version of Java doesn’t appear in the Installed JREs list, click the Add button.

Dalvik bytecode is similar to the code in Listing 1-3, but Dalvik bytecode isn’t specific to a single kind of processor or to a single operating system. Instead, a set of Dalvik bytecode instructions runs on any processor. If you write a Java program and compile that Java program into Dalvik bytecode, your Android phone can run the bytecode, your Android tablet can run the bytecode, and even your grandmother’s supercomputer can run the bytecode. ) You never have to write or decipher Dalvik bytecode.

Apk extension. apk file to the app store’s servers. apk file. To perform the compilation from source code to Java bytecode, Eclipse uses a program named javac, also known as the Java compiler. To perform the compilation from Java bytecode to Dalvik code, Eclipse uses a program named dx (known affectionately as “the dx tool”). apk file, Eclipse uses a program named apkbuilder. What is a virtual machine? ” earlier in this chapter, I make a big fuss about phones and other devices following instructions like the ones in Listing 1-3.

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