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Making Tab and Menu Icons for Android
When designing mobile apps or drawing graphics for mobile apps, one must conform to certain guidelines. Re-using graphics made for other operating systems, especially desktop-based, is not a good idea. Foreign graphics will look weird at best, or will make your Android apps appear hardly recognizable at worst.Producing Standard Tab and Menu Icons for Android Apps Description: When designing Android apps or drawing graphics for Android apps, one must conform to srict guidelines. Using images made 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 appear hardly recognizable at worst. Body: There exist precise guidelines available in reference to Android icons. Different design guidelines are published for tab icons and menu images.
Tab icons are drawn in individual tabs in tabbed interface. Tab icons must be provided in two different states: unselected and selected. It is recommended that tab icons are created as simple, flat shapes as opposed to icons shown in 3D or isometric projection.
Android OS and Android apps can run on a variety of hardware platforms employing a wide range of hardware. In connection to icon graphics, those platforms can have different screen sizes, screen resolutions, pixel density and dimensions. To accommodate the wide range of screens, Android developers should supply all tab icons used in their apps in at least three resolutions to be drawn on low, medium, and high density screens. Pixel-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 supplying all three standard sizes, developers can ensure that their apps will display properly on a variety of platforms running the Android OS.
Menu icons are used in the "options" menu, and are displayed to the user 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 described in a slightly more complex way as opposed to to tab icons. Instead of two resolutions defined for tab icons (inner shape and boundary box), the inner shape of menu icons can be smaller or larger depending on their shape. If a menu icon is square-shaped, its dimensions should be smaller than for icons with different shapes. The reason for having two different sizes 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 pixels. Similarly, medium-definition icons should fit 30x30 and 32x32 pixel boxes, while high-definition images should fit into 44x44 and 48x48 pixel boundaries respectively.
Instead of drawing your own images conforming to these guidelines, Android developers have an option of obtaining stock icons from professional designers. As an example, Android Tab Icons by Aha-Soft offer 112 unique tab images in both states and all 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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