I was wondering how to change the launcher icon in Android Studio.
To quickly create a new set of icons and change the launcher icon in Android Studio, you can:
Use this tool: https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html to upload your preferred image or icon (your source file). The tool then automatically creates a set of icons in all the different resolutions for the ic_launcher.png.
Download the zip-file created by the tool, extract everything (which will create a folder structure for all the different resolutions) and then replace all the icons inside your project res folder: