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Butter Icon
Image sizes: 256x256, 48x48, 32x32, 24x24, 16x16
File formats: BMP, GIF, PNG, ICO
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Designing Tab and Menu Icons for Android
When designing Android apps or drawing graphics for mobile apps, it is essential to follow srict guidelines. Re-using images designed for different operating systems, especially desktop-based, is generally not a good idea. Foreign graphics will look weird at best, or will render your Android apps hardly recognizable at worst.
Producing Standard Tab and Menu Icons for Android
Description:
When developing Android apps or designing graphics for Android apps, one must follow certain guidelines. Re-using graphics designed for other operating systems, especially desktop-based, is generally 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 in reference to Android icons. Different design guidelines are available for tab icons and menu graphics.
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 multitude of different platforms employing a wide range of hardware. In connection to icon graphics, those platforms can have different display sizes, screen resolutions, pixel dimensions and density. To accommodate the wide range of displays, 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 displays. Pixel-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 supplying all three standard resolutions, developers 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 the user 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 resolutions for menu icons are defined in a slightly more comprehensive way compared to tab icons. Instead of two resolutions 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 shaped otherwise. The reason for specifying two different size limits is to establish a consistent visual weight across the two icon types.
The outer dimensions for ldpi, mdpi and hdpi icons are described 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 pixels. Similarly, mdpi 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 icons matching these guidelines, Android developers have an option of obtaining ready-made graphics from professional designers. For example, Android Tab Icons by Aha-Soft offer 112 unique tab icons in selected and unselected states and all three standard sizes. If an additional size is needed, developers can render graphics at any size by accessing 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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