Android Programming: The Big Nerd Ranch Guide by Bill Phillips

By Bill Phillips

Android Programming: the large Nerd Ranch Guide: is an introductory Android e-book for programmers with Java event. in response to significant Nerd Ranch’s well known Android Bootcamp path, this advisor will lead you thru the barren region utilizing hands-on instance apps mixed with transparent reasons of key strategies and APIs. This publication specializes in functional suggestions for constructing apps appropriate with all types of Android accepted this day (Android 2.2 - 4.2). Write and run code each step of how – developing apps that catalog crime scenes, browse pictures, music your strolling course, and extra. every one bankruptcy and app has been designed and demonstrated to supply the data and event you want to start in Android improvement.

Write and run code each step of how — growing apps that catalog crime scenes, browse photographs, music your strolling path, and extra. each one bankruptcy and app has been designed and established to supply the information and adventure you want to start in Android improvement.

"Big Nerd Ranch supplied the educational we would have liked to get 1000s of engineers development skillfully on Android. This e-book is a smart distillation of that education and may be a tremendous support to someone seeking to ramp up as well." – Mike Shaver, Director of cellular Engineering, fb

"…a must-have for the developer simply beginning in Android or prepared for extra complicated innovations. i used to be inspired with this book’s content material and readability of presentation. The authors clarify basic and intricate Android themes with equivalent ease." – James Steele, writer of The Android Developer's Cookbook

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This attribute tells the widget what text to display. Notice that the values of these attributes are not literal strings. They are references to string resources. A string resource is a string that lives in a separate XML file called a strings file. You can give a widget a hard-coded string, like android:text="True", but it is usually not a good idea. Placing strings into a separate file and then referencing them is better because it makes localization easy. xml do not exist yet. Let’s fix that.

To create an Android virtual device (AVD), choose Tools → Android → AVD Manager. When the AVD Manager appears, click the Create Virtual Device... button on the lefthand side of the window. In the dialog that appears, you are offered many options for configuring a virtual device. 15. Click Next. 15 Choosing a virtual device 26 Running on the Emulator On the next screen, choose a system image that your emulator is based on. 16). 16 Choosing a system image Finally, you can review and tweak properties of the emulator.

Button; Or you can do it the easy way and let Android Studio do it for you. Just press Option+Return (or Alt +Enter) to let the IntelliJ magic under the hood amaze you. The new import statement now appears with the others at the top of the file. This shortcut is generally useful when something is not correct with your code. Try it often! This should get rid of the errors. ) Now you can wire up your button widgets. This is a two-step process: • get references to the inflated View objects • set listeners on those objects to respond to user actions Getting references to widgets In an activity, you can get a reference to an inflated widget by calling the following Activity method: public View findViewById(int id) This method accepts a resource ID of a widget and returns a View object.

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