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Producing Tab and Menu Icons for Android
When designing Android apps or designing graphics for mobile apps, it is essential to conform to srict guidelines. Using graphics designed for different operating systems, especially desktop-based, is not a good idea. Foreign icons will look weird at best, or will make your Android apps appear hardly recognizable at worst.Designing Standard Tab and Menu Icons for Android Apps Description: When developing mobile apps or designing graphics for mobile apps, it is essential to follow certain guidelines. Re-using graphics designed for different operating systems, especially desktop-based, is generally 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 are strict guidelines available for designing standard-compliant Android icons. Different design guidelines are published for tab icons and menu graphics.
Tab icons are drawn in individual tabs in tabbed UI. Tab icons should be supplied in two different states: unselected and selected. It is required that tab icons are designed as simple, flat shapes as opposed to icons 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 screen sizes, screen resolutions, pixel dimensions and density. To accommodate the wide range of screens, Android developers should supply all tab icons used in their apps in at least three resolutions to be shown 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 including all three standard resolutions, designers can ensure that their apps will display properly on a variety of platforms 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 should be flat, greyscale images. Just as tab icons, developers should not use 3D or isometric projections.
Screen resolutions for menu icons are defined in a slightly more comprehensive way compared to tab icons. Instead of just two sizes defined 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 shaped otherwise. The reason for having two different sizes is to establish a consistent visual weight 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 boxes, while high-definition images should fit into 44x44 and 48x48 pixel boxes respectively.
Instead of drawing your own images matching these guidelines, Android developers have an option of getting stock images from professional designers. For example, Android Tab Icons by Aha-Soft offer 112 unique tab images in selected and unselected states and all three standard resolutions. If an additional size is needed, developers can produce images at any size by opening scalable vector sources. Android Tab Icons can be viewed and downloaded at http://www.aha-soft.com/stock-icons/android-tab-icons.htm.
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