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You can set a single icon that will be used for all platforms (please see the note below regarding iOS limitations), and all display resolutions simply by using the "icon" tag:
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Simply copy and paste this line into your XML document. It doesn't matter where, as long as it is in the "widget" level. Keep in mind, however, that this won't offer the optimum resolutions for devices, and so on some devices the icon may look fuzzy.
| Info |
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| Note: To use a single icon with iOS, this icon must be 120x120 pixels, however this icon will not scale. For higher or lower resolution devices, you will simply see a placeholder icon. We strongly recommend you add the full iOS icon set as described below. |
Specific Icon Sizes:
To better control the look of your icons, and to ensure they don't need to be resized depending on platform and device resolution, you can set multiple icon sizes.
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The sizes of each icon are:
| iOS version | Device | Filename | Size |
|---|---|---|---|
| 8+ | iPhone 6 Plus | icon-60@3x.png | 180x180 |
| 7+ | iPhone / iPod Touch | icon-60.png | 60x60 |
| icon-60@2x.png | 120x120 | ||
| iPad | icon-76.png | 76x76 | |
| icon-76@2x.png | 152x152 | ||
| 6.1 | Spotlight Icon | icon-40.png | 40x40 |
| icon-40@2x.png | 80x80 | ||
| iPhone / iPod Touch | icon.png | 57x57 | |
| icon@2x.png | 114x114 | ||
| iPad | icon-72.png | 72x72 | |
| icon-72@2x.png | 144x144 | ||
| iPhone Spotlight and Settings | icon-small.png | 29x29 | |
| icon-small@2x.png | 58x58 | ||
| iPad Spotlight and Settings | icon-50.png | 50x50 | |
| icon-50@2x.png | 100x100 |
You can read more about the use of each icon size on Apples Apple's website:
https://developer.apple.com/ios/human-interface-guidelines/graphics/app-icon/
Next Step
Building Your Appfor Android