By Ian G. Clifton
Construct Android Apps which are Stunningly beautiful, practical, and Intuitive In today’s crowded Android market, it’s extra very important than ever to distinguish your apps. nice layout is easy methods to do this. Now, best Android app layout professional Ian G. Clifton exhibits you the way to make your apps come alive and the way to bring apps that clients will wish, love, and purchase! Reflecting the Android 4.2 SDK, this publication serves either as an educational for the whole layout and implementation technique and as a convenient reference you’ll depend upon for each Android improvement undertaking. Clifton indicates the best way to create powerful designs, get them organized into Android elements, and stream gracefully from notion, to wireframe, to comp, to comprehensive app. You’ll the best way to convey your personal voice, character, and elegance in your app designs the best way to leverage complex drawing ideas corresponding to PorterDuff compositing the right way to attempt designs on different Android units and lots more and plenty extra. Android person Interface layout information each one step of the layout and improvement strategy and includes wide downloadable pattern code, together with entire accomplished apps. find out how Android has advanced to help extraordinary app layout combine app layout with improvement, from notion via deployment comprehend perspectives, the construction blocks of Android person interfaces utilize wireframes and prototypes construct effective layouts and combine soft animations Make apps extra worthy by means of instantly updating ListViews mix perspectives into customized parts Use photo compositing and different complex suggestions paintings with the canvas and complicated drawing Leverage Google Play and Amazon Appstore resources One step at a time, this consultant is helping you bridge the space among Android builders and architects so that you can paintings with colleagues to create world-class app designs...or do it your self!
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Extra info for Android User Interface Design Turning Ideas and Sketches into Beautifully Designed Apps
Although later chapters will discuss working with images and ImageView in much more depth, one more extremely common ImageView attribute that you should know is scaleType, which defines how the view handles displaying an image that is larger or smaller than the view’s area. 5 for a visual example that shows each of the different ways of scaling an image as well as the full-sized image. 5 Each of the ScaleTypes are shown on the left, and the image that is being scaled is shown on the right. ImageButton An ImageButton is a class that extends ImageView to display an image on top of a standard button.
Because screens have different densities, specifying your layouts in pixels will cause screen elements to appear to shrink the higher the density of the device (for example, specifying a line to be 100px long would be one inch on a device that displays one hundred pixels per inch, but it’d only be half an inch on a display that is 200 pixels per inch). Instead, you can use dp in order to have dimensions automatically scale for you based on the device’s density. Android currently specifies five different densities based on dots per inch (DPI): LDPI (low dots per inch), MDPI (medium dots per inch), HDPI (high dots per inch), XHDPI (extra high dots per inch), and XXHDPI (extra, extra high dots per inch).
Use images to convey meaning quickly. Use consistent visuals to anchor the user. Use animations to tell the user something is happening (for example, “You moved to a new part of the app, and pressing the back button will go to the previous part” or “Some content is still loading”). In fact, animations can be so important to the user experience that a big portion of Chapter 9, “Further Improving the App,” covers how you should and should not use animations. Always include all applicable touch states.