By Bill Phillips, Brian Hardy
Android Programming: the massive Nerd Ranch consultant: is an introductory Android booklet for programmers with Java event. in response to immense Nerd Ranch’s renowned Android Bootcamp path, this advisor will lead you thru the desolate tract utilizing hands-on instance apps mixed with transparent causes of key options and APIs. This publication makes a speciality of useful ideas for constructing apps appropriate with all models of Android accepted at the present time (Android 2.2 - 4.2). Write and run code each step of how – growing apps that catalog crime scenes, browse images, song your strolling path, and extra. every one bankruptcy and app has been designed and confirmed to supply the data and event you want to start in Android development.
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 proven to supply the data and adventure you must start in Android development.
"Big Nerd Ranch supplied the learning we wanted to get 1000s of engineers development skillfully on Android. This ebook is a brilliant distillation of that education and should be an important support to an individual seeking to ramp up as well." – Mike Shaver, Director of cellular Engineering, Facebook
"…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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Extra info for Android Programming: The Big Nerd Ranch Guide
When an activity is created, it needs a user interface to manage. To get the activity its user interface, you call the following Activity method: public void setContentView(int layoutResID) This method inflates a layout and puts it on screen. When a layout is inflated, each widget in the layout file is instantiated as defined by its attributes. You specify which layout to inflate by passing in the layout’s resource ID. Resources and resource IDs A layout is a resource. A resource is a piece of your application that is not code – things like image files, audio files, and XML files.
You can use all the usual escape sequences in your string resources, such as \n for a new line. Save your files. xml and preview your layout changes in the graphical layout tool. That is all for now for GeoQuiz’s view layer. Time to wire everything up in your controller class, QuizActivity. Updating the Controller Layer In the previous chapter, there was not that much happening in GeoQuiz’s one controller, QuizActivity. xml. It set listeners on two buttons and wired them to make toasts. Now that you have multiple questions to retrieve and display, QuizActivity will have to work harder to tie GeoQuiz’s model and view layers together.
They report the same problem: Button cannot be resolved to a type. java. Button; Or you can do it the easy way and organize your imports. Organizing imports When you organize imports, you ask Eclipse to look at your code and determine what you need from the Java and Android SDKs. It imports what you need and removes any previously imported classes that you are no longer using. To organize your imports, press: Command+Shift+O for Mac Ctrl+Shift+O for Windows and Linux This should get rid of the errors.