Use appcompat and other support libraries to deliver your material design UI to older platform versions. Vector drawables are appropriate for simple icons and can reduce the size of your app.
A notification is a message that you can display to the user outside of the normal UI of your app. If your app supports Android 2. Later Android versions use the white icon that Image Asset Studio generates.
For more information, see Material Icons. You can import your own images and adjust them for the icon type. Image Asset Studio lets you type a text string in a variety of fonts, and places it on an icon.
It converts the text-based icon into PNG files for different densities. You can use the fonts that are installed on your computer. Note: If your app supports versions no higher than Android 7. After you open Image Asset Studio , you can add adaptive and legacy icons by following these steps:. Note: If your app supports Android 8. After you open Image Asset Studio , you can add a launcher icon by following these steps:. In the Select Icon dialog, select a material icon and then click OK.
The icon appears in the Source Asset area on the right side, and in the preview area at the bottom of the wizard. Image Asset Studio places the icon within a transparent square so there's some padding on the edges. The padding provides adequate space for the standard drop-shadow icon effect.
The Output Directories area displays the images and the folders where they will appear in Project Files view of the Project window. Image Asset Studio adds the images to the mipmap folders for the different densities. After you open Image Asset Studio , you can add an action bar or tab icon by following these steps:.
Image Asset Studio creates the icon within a transparent square so there's some padding on the edges. Image Asset Studio adds the images in the drawable folders for the different densities. After you open Image Asset Studio , you can add a notification icon by following these steps:. Image Asset Studio adds the images in the drawable folders for the different densities and versions. You can normally refer to an image resource in a generic way in your code, and when your app runs, the corresponding image displays automatically depending on the device:.
The following Java code retrieves the image as a Drawable :. The getResources method resides in the Context class, which applies to UI objects, such as activities, fragments, layouts, views, and so on. See Accessing Resources for more information. For launcher icons, the AndroidManifest.
Image Asset Studio adds this code automatically. Or right-click the file and select Delete. Android Studio deletes the files from the project and the drive. You can control the look of your adaptive launcher icon by defining 2 layers, consisting of a background and a foreground.
You must provide icon layers as drawables without masks or background shadows around the outline of the icon. Figure 2. Adaptive icons are defined using 2 layers and a mask. In Android 7. You must now size your icon layers using the following guidelines:. Note: Animated visual effects are generated by supported launchers. Visual effects may vary from one launcher to another.
Caution: A device OEM can specify a mask that may include a radius that is as short as 33 dp along certain points of the shape. Caution: If you don't update your launcher icon with the necessary layers, the icon doesn't look consistent with other icons that the system UI displays, and doesn't support visual effects.
To add an adaptive icon to an app using XML, begin by updating the android:icon attribute in your app manifest to specify a drawable resource. You can also define an icon drawable resource using the android:roundIcon attribute. You must only use the android:roundIcon attribute if you require a different icon asset for circular masks, if for example the branding of your logo relies on a circular shape. The following code snippet illustrates both of these attributes:. Next you must create alternative drawable resources in your app for use with Android 8.
If you want to apply the same mask and visual effect to your shortcuts as regular adaptive launcher icons, use one of the following techniques:. For additional information on designing and implementing adaptive icons, read this series of articles by Google designer and developer Nick Butcher:. Content and code samples on this page are subject to the licenses described in the Content License.
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