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Making Standard Tab and Menu Icons for Android Apps
When developing mobile apps or drawing graphics for mobile apps, it is essential to conform to certain guidelines. Re-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 make your Android apps appear hardly recognizable at worst.Making Standard Tab and Menu Icons for Android Apps Description: When developing Android apps or drawing graphics for mobile apps, it is essential to conform to certain guidelines. Using images made for different operating systems, especially desktop-based, is not a good idea. Foreign icons will look weird at best, or will render your Android apps hardly recognizable at worst. Body: There are strict guidelines published in reference to Android icons. Different design guidelines are available for tab icons and menu icons.
Tab icons represent individual tabs in tabbed UI. Tab icons must be provided in two distinct states: selected and unselected. It is required that tab icons are created as simple, flat shapes as opposed to icons drawn in 3D or isometric projection.
Android OS and Android apps can run on a wide range of different platforms using a wide range of hardware. In reference to icon graphics, those devices can have different display sizes, screen resolutions, pixel density and dimensions. To accommodate the variety of displays, Android developers should provide all tab icons used in their apps in at least three resolutions to be shown on low, medium, and high density screens. Resolution-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 including all three standard sizes, developers can ensure that their apps will be shown properly on a wide range of platforms running the Android OS.
Menu icons are displayed in the "options" menu, and are shown to users when they press the Menu button. Similar to tab icons, menu icons should be flat, grayscale images. Like tab icons, developers cannot use 3D or isometric projections.
Pixel sizes for menu icons are defined in a slightly more comprehensive way as opposed to 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 their shape. If a menu icon is square-shaped, its size 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 described 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 rectangles respectively.
Instead of drawing your own graphics conforming to these guidelines, Android developers have an option of ordering stock graphics from professional designers. For example, Android Tab Icons by Aha-Soft include 112 unique tab images in both states and all standard resolutions. Should additional resolutions be required, developers can produce icons at any size by accessing 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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