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Making Tab and Menu Icons for Android Apps
When designing mobile apps or drawing graphics for mobile apps, one must conform to certain guidelines. Using graphics made for other systems, especially desktop-based, is not a good idea. Foreign graphics will look out of place at best, or will make 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, it is essential to follow certain guidelines. Using images designed for different operating 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 are strict guidelines published for designing standard-compliant Android icons. Different design guidelines are available for tab icons and menu images.
Tab icons represent individual tabs in tabbed UI. Tab icons must be supplied in two distinct states: selected and unselected. It is recommended that tab icons are drawn as simple, flat shapes as opposed to graphics drawn in 3D or isometric projection.
Android OS and Android apps can run on a wide range of hardware platforms employing a wide range of hardware. In connection to icon images, those devices can have different display sizes, display resolutions, pixel dimensions and density. To accommodate the variety of displays, Android developers must supply all tab icons used in their apps in at least three resolutions to be drawn 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 providing all three standard sizes, designers can ensure that their apps will display properly on a variety of devices running the Android OS.
Menu icons are drawn in the "options" menu, and are shown to users when they press the Menu button. Similar to tab icons, menu icons are specified as flat, grayscale images. Like tab icons, developers should not use 3D or isometric projections.
Pixel sizes for menu icons are described in a slightly more complex way as opposed to 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 bigger depending on whether they are square-shaped or not. If a menu icon is square-shaped, its size should be smaller than for icons with different shapes. The reason for having 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 is 22x22 pixels, while non-square icons should fit into a boundary box sized 24x24 dots. 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 matching these guidelines, Android developers have an option of obtaining stock graphics from professional designers. For example, Android Tab Icons by Aha-Soft include 112 unique tab icons in both states and all standard sizes. If an additional size is needed, developers can produce images 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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