By Jason Ostrander
Writer Jason Ostrander walks builders in the course of the assorted offerings to be had on their strategy to making a well-designed software for Android. whereas construction an easy program, Jason works during the fundamentals of Android UI improvement together with structure, occasion dealing with, menus and notifications. the writer then indicates the right kind solution to load and show pictures, create complex dialogs and growth symptoms, upload animation, and the way to construct customized UI parts. Jason discusses the correct approach of including interplay via gestures and the complicated graphical ideas on hand utilizing Canvas, Renderscript and OpenGL. eventually, he discusses capsule improvement, the original changes among mobilephone and capsule UI, and the recent APIs on hand to pill builders.
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Additional resources for Android UI Fundamentals Develop & Design
Tip: It is often difficult for users to discover features hidden behind the Menu button. Carefully consider your application’s needs, and provide space in your layout for all common operations that the user will need to take. 20 Chapter 1 Getting Started Finally, the Search button exists to provide a quick interface for launching a search on Android. Not all applications use this button, and in many applications, pressing this button does nothing. In addition to these buttons, it is also possible to perform an alternative action on some hardware buttons.
Now try changing the size of the TextView. 5. Make it fill the width of the window. 6. Add a Button below your newly created TextView, and expand it to fill the width of the window. 15. As you can see, the graphical layout editor makes it possible to quickly create complex layouts with very little effort. Tools 25 Android Virtual Devices Android is designed to run on a wide range of hardware. It’s important to test your code extensively before release to ensure that your app is compatible with most Android devices.
Buttons 1, 2, 3, 4, and 5 are positioned relative to the parent RelativeLayout container. The corner buttons have attributes aligning them with the top, bottom, left, and right of the relative layout. The center button is aligned with the center of the relative layout, and the remaining buttons are positioned relative to the center button. 1 lists the attributes available for views inside a RelativeLayout, as well as how they are used. Note: The child views of a relative layout are arranged in the order they are declared.
Android UI Fundamentals Develop & Design by Jason Ostrander