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Designing Tab and Menu Icons for Android
When developing Android apps or designing graphics for Android apps, it is essential to follow certain guidelines. Re-using icons made for other systems, especially desktop-based, is generally not a good idea. Foreign images will look weird at best, or will render your Android apps appear hardly recognizable at worst.Designing Standard Tab and Menu Icons for Android Description: When designing mobile apps or drawing graphics for Android apps, it is essential to conform to certain guidelines. Re-using graphics made for other operating systems, especially desktop-based, is not a good idea. Foreign images will look out of place at best, or will render your Android apps hardly recognizable at worst. Body: There exist precise guidelines published in reference to Android icons. Different design guidelines are published for tab icons and menu graphics.
Tab icons represent individual tabs in tabbed interface. Tab icons must be provided in two distinct states: unselected and selected. It is recommended that tab icons are designed as simple, flat shapes as opposed to images shown in 3D or isometric projection.
Android OS and Android apps can run on a variety of hardware platforms using a wide range of hardware. In connection to icon images, those devices can have different display sizes, display resolutions, pixel density and dimensions. To accommodate the variety of displays, Android developers should supply all tab icons used in their apps in at least three resolutions to be displayed on low, medium, and high density screens. Pixel-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 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 drawn 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. Just as tab icons, developers cannot use 3D or isometric projections.
Screen resolutions for menu icons are defined in a slightly more comprehensive way compared to tab icons. Instead of two sizes described 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 resolution should be smaller than for icons with different shapes. The reason for specifying two different sizes is to establish a consistent visual weight across the two icon types.
The outer dimensions for ldpi, mdpi and hdpi icons are defined 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 boxes, while high-definition images should fit into 44x44 and 48x48 pixel boundaries respectively.
Instead of drawing your own graphics conforming to these guidelines, Android developers have an option of getting ready-made graphics from professional designers. For example, Android Tab Icons by Aha-Soft offer 112 unique tab graphics in both states and all standard sizes. If an additional size is needed, developers can render images 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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