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Producing Standard Tab and Menu Icons for Android Apps
When developing mobile apps or designing graphics for mobile apps, one must follow certain guidelines. Re-using icons made for other systems, especially desktop-based, is generally not a good idea. Foreign graphics will look out of place at best, or will make your Android apps hardly recognizable at worst.Designing Tab and Menu Icons for Android Apps Description: When developing Android apps or drawing graphics for Android apps, one must conform to srict guidelines. Using images designed for other systems, especially desktop-based, is not a good idea. Foreign icons will look out of place at best, or will render your Android apps hardly recognizable at worst. Body: There are precise guidelines available for designing standard-compliant Android icons. Different design guidelines are available for tab icons and menu icons.
Tab icons are drawn in individual tabs in tabbed UI. Tab icons should be supplied in two different states: unselected and selected. It is required that tab icons are drawn as simple, flat shapes as opposed to images drawn in 3D or isometric projection.
Android OS and Android apps can run on a multitude of different platforms using 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 displays, Android developers must provide all tab icons used in their apps in at least three resolutions to be shown on low, medium, and high density screens. Pixel-wise, the outer boundaries for the three resolutions are defined as 24x24, 32x32, and 48x48 pixels. The size of the shape itself should not exceed 22x22, 28x28, and 42x42 pixels respectively. By supplying all three standard resolutions, developers can ensure that their apps will display properly on a variety of platforms running the Android OS.
Menu icons are displayed in the "options" menu, and are displayed to users when they press the Menu button. Similar to tab icons, menu icons should be flat, greyscale images. Like tab icons, developers cannot use 3D or isometric projections.
Screen resolutions for menu icons are described in a slightly more complex way as opposed to to tab icons. Instead of just two sizes 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 with different shapes. The reason for having two different size limits is to establish a consistent visual size across the two icon types.
The outer dimensions for low, medium, and high resolution icons are defined as 36x36, 48x48, and 72x72 pixels respectively. Inner shapes for square, low-definition icons is 22x22 pixels, while non-square icons should fit into a boundary box sized 24x24 dots. Similarly, medium-definition icons should fit 30x30 and 32x32 pixel boundaries, while high-definition images should fit into 44x44 and 48x48 pixel boxes respectively.
Instead of drawing your own icons matching these guidelines, Android developers have an option of obtaining ready-made images from professional designers. As an example, Android Tab Icons by Aha-Soft include 112 unique tab graphics in selected and unselected states and all three standard resolutions. Should additional resolutions be required, developers can produce graphics at any size by accessing 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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