Creating Image Assets
IntelliJ IDEA allows you to easily create icons for your Android applications with the help of the Asset Studio wizard. The wizard creates multiple icons for different screen resolutions and lets you see a live preview in the process of creating. You can create icons using your own images, clipart images, or text, configure the background shape, the colors, the fonts, etc.
To create an image asset
In the Project tool window, right-click the res where all Android resource definitions are stored. Select New | Image Asset from the context menu. The Asset Studio wizard opens.
On the first page of the wizard, select the asset type (launcher icons, action bar and tab icons, or notification icons) and the source for your icon: image, clipart or text.
Adjust your icon's shape, colors, aspect ratio, etc. depending on the selected asset type and source (for a detailed explanation of the available options, refer to Asset Studio. Page 1.
On the second page of the wizard, preview output formats of your image asset and click Finish to complete the wizard.