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Designing Standard Tab and Menu Icons for Android
When designing Android apps or designing graphics for Android apps, one must follow certain guidelines. Re-using graphics designed for other systems, especially desktop-based, is generally not a good idea. Foreign icons will look weird at best, or will make your Android apps appear hardly recognizable at worst.Producing Tab and Menu Icons for Android Apps Description: When developing Android apps or designing graphics for mobile apps, it is essential to follow srict guidelines. Re-using graphics designed for different systems, especially desktop-based, is generally not a good idea. Foreign graphics will look weird at best, or will make your Android apps appear hardly recognizable at worst. Body: There exist strict guidelines available for designing standard-compliant Android icons. Different design guidelines are available for tab icons and menu images.
Tab icons are drawn in individual tabs in tabbed interface. Tab icons should be provided in two distinct states: selected and unselected. It is required that tab icons are created as simple, flat shapes as opposed to images drawn in 3D or isometric projection.
Android OS and Android apps are used on a variety of hardware platforms employing a wide range of hardware. In connection to icon images, those devices can have different screen sizes, screen resolutions, pixel dimensions and density. To accommodate the wide range of screens, Android developers must supply all tab icons used in their apps in at least three resolutions to be displayed on low, medium, and high density screens. Resolution-wise, the outer boundaries for the three sizes are defined as 24x24, 32x32, and 48x48 pixels. Inner dimensions should not exceed 22x22, 28x28, and 42x42 pixels respectively. By providing all three standard resolutions, developers can ensure that their apps will display properly on a wide range of platforms running the Android OS.
Menu icons are displayed in the "options" menu, and are displayed to the user when they press the Menu button. Similar to tab icons, menu icons are specified as flat, grayscale images. Like tab icons, developers should not use 3D or isometric projections.
Pixel sizes for menu icons are defined in a slightly more comprehensive way compared to tab icons. Instead of two resolutions described for tab graphics (inner shape and boundary box), the inner shape of menu icons can be smaller or larger depending on whether they are square-shaped or not. If a menu icon is square-shaped, its dimensions should be smaller than for icons shaped otherwise. The reason for having two different size limits is to establish a consistent visual weight across the two icon types.
The outer dimensions for ldpi, mdpi and hdpi icons are described as 36x36, 48x48, and 72x72 pixels respectively. Inner shapes for square, low-definition icons should be 22x22 pixels, while non-square icons should fit into a boundary box sized 24x24 pixels. Similarly, medium-definition icons should fit 30x30 and 32x32 pixel boundaries, while high-definition images should fit into 44x44 and 48x48 pixel boundaries respectively.
Instead of designing your own images matching these guidelines, Android developers have an option of obtaining stock graphics from professional designers. As an example, Android Tab Icons by Aha-Soft include 112 unique tab images in both states and all standard sizes. Should additional resolutions be required, developers can produce graphics at any resolution by opening scalable vector sources. Android Tab Icons can be viewed and downloaded at http://www.aha-soft.com/stock-icons/android-tab-icons.htm.
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