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Designing Standard Tab and Menu Icons for Android Apps
When developing mobile apps or designing graphics for Android apps, it is essential to follow certain guidelines. Re-using graphics made for other systems, especially desktop-based, is generally not a good idea. Foreign graphics will look weird at best, or will make your Android apps appear hardly recognizable at worst.Making Standard Tab and Menu Icons for Android Apps Description: When designing Android apps or drawing graphics for Android apps, one must follow srict guidelines. Re-using images made for different systems, especially desktop-based, is not a good idea. Foreign graphics 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 are drawn in individual tabs in tabbed interface. Tab icons must be provided in two different states: unselected and selected. It is recommended that tab icons are designed as simple, flat shapes as opposed to icons shown in 3D or isometric projection.
Android OS and Android apps are used on a multitude of different platforms using a wide range of hardware. In reference to icon graphics, those devices can have different screen sizes, screen resolutions, pixel density and dimensions. To accommodate the wide range of displays, 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 screens. 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 supplying all three standard sizes, designers can ensure that their apps will display 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, grayscale images. Like tab icons, developers cannot use 3D or isometric projections.
Screen sizes for menu icons are defined in a slightly more complex way compared to tab icons. Instead of just two resolutions described 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 sizes 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 should be 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 boxes 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 include 112 unique tab images in selected and unselected states and all three standard resolutions. If an additional size is needed, developers can render graphics 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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