By Jason Ostrander
Writer Jason Ostrander walks builders in the course of the various offerings to be had on their solution to making a well-designed program for Android. whereas development an easy program, Jason works throughout the fundamentals of Android UI improvement together with format, occasion dealing with, menus and notifications. the writer then indicates the correct solution to load and demonstrate photographs, create complex dialogs and development symptoms, upload animation, and the way to construct customized UI parts. Jason discusses the right kind means of including interplay via gestures and the complicated graphical strategies on hand utilizing Canvas, Renderscript and OpenGL. eventually, he discusses capsule improvement, the original adjustments among cell and pill UI, and the recent APIs on hand to pill builders.
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Extra resources for Android UI Fundamentals Develop & Design
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. This is where the Android Virtual Devices, or AVDs, come in.
Simply hold the power and volume down buttons at the same time, and a screenshot will be saved to your device image gallery. 18 An example of the Draw 9-patch tool. The button can stretch, but the corners remain the same. Other Tools In addition to the common Android UI tools, there are some lesser-known tools that are useful for perfecting your app UI. draw9patch Images used in Android applications are often stretched to fit the available area on a device. This can distort the image, resulting in ugly graphics.
This will open the Device Screen Capture window. From here you can rotate the image, refresh it to recapture the screen, and save it. 0 and above has the ability to take screenshots without using DDMS. Simply hold the power and volume down buttons at the same time, and a screenshot will be saved to your device image gallery. 18 An example of the Draw 9-patch tool. The button can stretch, but the corners remain the same. Other Tools In addition to the common Android UI tools, there are some lesser-known tools that are useful for perfecting your app UI.