Set icon for Android application

Solution 1:

If you intend on your application being available on a large range of devices, you should place your application icon into the different res/drawable... folders provided. In each of these folders, you should include a 48dp sized icon:

• drawable-ldpi (120 dpi, Low density screen) - 36px x 36px
• drawable-mdpi (160 dpi, Medium density screen) - 48px x 48px
• drawable-hdpi (240 dpi, High density screen) - 72px x 72px
• drawable-xhdpi (320 dpi, Extra-high density screen) - 96px x 96px
• drawable-xxhdpi (480 dpi, Extra-extra-high density screen) - 144px x 144px
• drawable-xxxhdpi (640 dpi, Extra-extra-extra-high density screen) - 192px x 192px

You may then define the icon in your AndroidManifest.xml file as such:

<application android:icon="@drawable/icon_name" android:label="@string/app_name" >
.... 
</application> 

Solution 2:

Add an application launcher icon with automatic sizing.

(Android studio)

Go to menu File* → New → Image Assets → select launcher icon → choose image file.

It will automatically re-size.

Done!

Solution 3:

I found this tool most useful.

1. Upload a image.
2. Download a zip.
3. Extract into your project.

Done

http://romannurik.github.io/AndroidAssetStudio/

Solution 4:

It's better to do this through Android Studio rather than the file browser as it updates all icon files with the correct resolution for each.

To do so go to menu File → New → Image Asset. This will open a new dialogue and then make sure Launcher Icons is selected (Which it is by default) and then browse to the directory of your icon (it doesn't have to be in the project resources) and then once selected make sure other settings are to your liking and hit done.

Now all resolutions are saved into their respective folders, and you don't have to worry about copying it yourself or using tools, etc.

Don't forget "Shape - none" for a transparent background.

Please don't edit my answer without asking.