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Producing Standard Tab and Menu Icons for Android Apps
When developing Android apps or designing graphics for Android apps, one must follow certain guidelines. Re-using images designed 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.Making Tab and Menu Icons for Android Description: When developing mobile apps or drawing graphics for mobile apps, one must conform to certain guidelines. Using icons made for other systems, especially desktop-based, is not a good idea. Foreign images will look out of place at best, or will render your Android apps appear 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 distinct states: selected and unselected. It is required that tab icons are designed as simple, flat shapes as opposed to images shown in 3D or isometric projection.
Android OS and Android apps are used on a variety of different platforms using a wide range of hardware. In reference to icon images, those devices can have different screen sizes, screen resolutions, pixel dimensions and density. To accommodate the variety of screens, Android developers must provide all tab icons used in their apps in at least three resolutions to be drawn on low, medium, and high density displays. 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, designers can ensure that their apps will be shown properly on a wide range of devices running the Android OS.
Menu icons are used in the "options" menu, and are shown 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 should not use 3D or isometric projections.
Screen sizes for menu icons are defined in a slightly more comprehensive way as opposed to to tab icons. Instead of just 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 shaped otherwise. 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 described 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, mdpi icons should fit 30x30 and 32x32 pixel boundaries, while high-definition images should fit into 44x44 and 48x48 pixel rectangles respectively.
Instead of designing 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 include 112 unique tab icons in both states and all standard resolutions. Should additional resolutions be required, developers can render icons 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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