By Bill Phillips
Android Programming: the large Nerd Ranch Guide: is an introductory Android e-book for programmers with Java event. in response to giant Nerd Ranch’s renowned Android Bootcamp path, this consultant will lead you thru the desolate tract utilizing hands-on instance apps mixed with transparent causes of key ideas and APIs. This ebook specializes in sensible thoughts for constructing apps appropriate with all models of Android typical at the present time (Android 2.2 - 4.2). Write and run code each step of how – developing apps that catalog crime scenes, browse photographs, music your walking direction, and extra. each one bankruptcy and app has been designed and proven to supply the information and adventure you want to start in Android improvement.
Write and run code each step of ways — growing apps that catalog crime scenes, browse pictures, music your walking direction, and extra. each one bankruptcy and app has been designed and confirmed to supply the information and event you want to start in Android improvement.
"Big Nerd Ranch supplied the educational we would have liked to get thousands of engineers development skillfully on Android. This ebook is a brilliant distillation of that education and should be a big support to a person trying 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 options. i used to be inspired with this book’s content material and readability of presentation. The authors clarify easy and intricate Android issues with equivalent ease." – James Steele, writer of The Android Developer's Cookbook
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Extra resources for Android Programming: The Big Nerd Ranch Guide
Virtual devices are powered by the Android emulator, which ships with the developer tools. 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.
Show(); // Does nothing yet, but soon! show(); // Does nothing yet, but soon! } }); In makeText(…), you pass the instance of QuizActivity as the Context argument. However, you cannot simply pass the variable this as you might expect. OnClickListener. Because you used code completion, you do not have to do anything to import the Toast class. When you accept a code completion suggestion, the necessary classes are imported automatically. Save your work, and let’s see your new app in action. 25 Chapter 1 Your First Android Application Running on the Emulator To run an Android application, you need a device – either a hardware device or a virtual device.
The java directory is where the Java code for your project lives. In the Project tool window, reveal the contents of the app/java directory and then the contents of the package. 4). onOptionsItemSelected(item); } (Wondering what AppCompatActivity is? It is a subclass of Android’s Activity class that provides compatibility support for older versions of Android. ) If you are not seeing all of the import statements, click the symbol to the left of the first import statement to reveal the others. This file has three Activity methods: onCreate(Bundle), onCreateOptionsMenu(Menu), and onOptionsItemSelected(MenuItem).