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Making Standard Tab and Menu Icons for Android Apps
When designing Android apps or drawing graphics for mobile apps, one must conform to srict guidelines. Using graphics made for other operating systems, especially desktop-based, is generally not a good idea. Foreign icons will look weird at best, or will make your Android apps hardly recognizable at worst.Designing Standard Tab and Menu Icons for Android Apps Description: When developing mobile apps or drawing graphics for Android apps, it is essential to conform to certain guidelines. Using icons made for other systems, especially desktop-based, is generally not a good idea. Foreign icons will look weird 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 icons.
Tab icons are drawn in individual tabs in tabbed UI. Tab icons should be supplied in two different states: selected and unselected. It is recommended that tab icons are designed as simple, flat shapes as opposed to graphics drawn in 3D or isometric projection.
Android OS and Android apps are used on a multitude of hardware platforms employing 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 screens, Android developers must supply all tab icons used in their apps in at least three resolutions to be displayed on low, medium, and high density screens. Resolution-wise, the outer boundaries for the three resolutions 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, designers can ensure that their apps will be shown properly on a variety of platforms running the Android OS.
Menu icons are displayed in the "options" menu, and are displayed to users 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.
Screen sizes for menu icons are described in a slightly more comprehensive way as opposed to to tab icons. Instead of two sizes defined for tab icons (inner shape and boundary box), the inner shape of menu icons can be smaller or larger 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 size across the two icon types.
The outer dimensions for low, medium, and high resolution 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 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 icons matching these guidelines, Android developers have an option of getting stock graphics from professional designers. As an example, Android Tab Icons by Aha-Soft include 112 unique tab graphics in selected and unselected states and all three standard resolutions. Should additional resolutions be required, developers can produce 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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