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Designing Tab and Menu Icons for Android Apps
When developing Android apps or drawing graphics for Android apps, one must follow srict guidelines. Re-using images made for other systems, especially desktop-based, is generally 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 Tab and Menu Icons for Android Apps
Description:
When designing mobile apps or designing graphics for Android apps, one must follow certain guidelines. Re-using graphics designed for different systems, especially desktop-based, is generally not a good idea. Foreign icons will look out of place at best, or will make 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 are drawn in individual tabs in tabbed UI. Tab icons must be provided in two different states: unselected and selected. 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 can run on a wide range of different platforms using a wide range of hardware. In connection to icon graphics, those devices can have different display sizes, display 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. The size of the shape itself should not exceed 22x22, 28x28, and 42x42 pixels respectively. By including all three standard sizes, developers can ensure that their apps will display properly on a wide range of devices running the Android OS.
Menu icons are drawn 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, greyscale images. Just as tab icons, developers cannot use 3D or isometric projections.
Pixel sizes for menu icons are defined 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 larger depending on their shape. If a menu icon is square-shaped, its size should be smaller than for icons with different shapes. The reason for specifying two different size limits is to establish a consistent visual size 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 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 boundaries, while high-definition images should fit into 44x44 and 48x48 pixel boundaries respectively.
Instead of designing your own graphics conforming to these guidelines, Android developers have an option of getting stock icons from professional designers. As an example, Android Tab Icons by Aha-Soft offer 112 unique tab graphics in both states and all three standard resolutions. If an additional size is needed, developers can render icons at any resolution 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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