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Producing Standard Tab and Menu Icons for Android Apps
When developing Android apps or drawing graphics for Android apps, one must follow certain guidelines. Using images made for different systems, especially desktop-based, is generally not a good idea. Foreign images will look out of place at best, or will render your Android apps appear hardly recognizable at worst.Designing Tab and Menu Icons for Android Apps Description: When designing Android apps or drawing graphics for mobile apps, it is essential to follow srict guidelines. Re-using images designed for other systems, especially desktop-based, is not a good idea. Foreign icons will look weird at best, or will make your Android apps hardly recognizable at worst. Body: There exist precise guidelines published for designing standard-compliant Android icons. Different design guidelines are published for tab icons and menu icons.
Tab icons represent individual tabs in tabbed UI. Tab icons should be supplied in two different states: selected and unselected. It is required that tab icons are drawn as simple, flat shapes as opposed to icons shown in 3D or isometric projection.
Android OS and Android apps can run on a wide range of different platforms employing a wide range of hardware. In connection to icon images, those devices can have different screen sizes, display resolutions, pixel dimensions and density. To accommodate the variety 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 resolutions are defined as 24x24, 32x32, and 48x48 pixels. Inner dimensions 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 wide range of platforms running the Android OS.
Menu icons are drawn in the "options" menu, and are displayed to users when they press the Menu button. Similar to tab icons, menu icons should be flat, grayscale images. Just as tab icons, developers cannot use 3D or isometric projections.
Pixel resolutions for menu icons are defined in a slightly more complex way compared to tab icons. Instead of just two resolutions defined for tab graphics (inner shape and boundary box), the inner shape of menu icons can be smaller or bigger depending on whether they are square-shaped or not. If a menu icon is square-shaped, its resolution should be smaller than for icons shaped otherwise. The reason for specifying two different size limits is to establish a consistent visual weight 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 pixels. Similarly, mdpi icons should fit 30x30 and 32x32 pixel boundaries, while high-definition images should fit into 44x44 and 48x48 pixel boundaries respectively.
Instead of drawing your own icons matching these guidelines, Android developers have an option of getting ready-made icons from professional designers. As an example, Android Tab Icons by Aha-Soft offer 112 unique tab images in selected and unselected states and all three standard sizes. Should additional resolutions be required, developers can render icons at any size by opening scalable vector sources. Android Tab Icons can be previewed and downloaded at http://www.aha-soft.com/stock-icons/android-tab-icons.htm.
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