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Making Standard Tab and Menu Icons for Android
When developing Android apps or drawing graphics for Android apps, it is essential to conform to certain guidelines. Using graphics made for different systems, especially desktop-based, is not a good idea. Foreign graphics will look weird at best, or will render your Android apps appear hardly recognizable at worst.Producing Tab and Menu Icons for Android Apps Description: When developing Android apps or drawing graphics for mobile apps, it is essential to conform to certain guidelines. Using icons designed for other systems, especially desktop-based, is not a good idea. Foreign images will look out of place at best, or will render your Android apps appear hardly recognizable at worst. Body: There are precise guidelines published in reference to Android icons. Different design guidelines are available for tab icons and menu images.
Tab icons represent individual tabs in tabbed UI. Tab icons should be supplied in two distinct states: selected and unselected. It is recommended that tab icons are drawn as simple, flat shapes as opposed to images drawn in 3D or isometric projection.
Android OS and Android apps can run on a variety of hardware platforms employing a wide range of hardware. In reference to icon images, those devices can have different screen sizes, screen resolutions, pixel density and dimensions. To accommodate the wide range of displays, Android developers should supply all tab icons used in their apps in at least three resolutions to be drawn on low, medium, and high density displays. Resolution-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, developers can ensure that their apps will be shown properly on a variety of platforms running the Android OS.
Menu icons are drawn 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 should not use 3D or isometric projections.
Screen sizes for menu icons are described in a slightly more complex way compared to tab icons. Instead of two sizes defined for tab graphics (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 dimensions 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 dots. 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 drawing your own icons conforming to these guidelines, Android developers have an option of getting ready-made icons from professional designers. As an example, Android Tab Icons by Aha-Soft include 112 unique tab icons in both states and all standard resolutions. If an additional size is needed, developers can render icons 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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