You don’t put it in the main.lua file.
Application Icons
Icon files named Icon-hdpi.png, Icon-mdpi.png, and Icon-ldpi.png will be copied into the .apk during the build, if they are available in your project folder. These icons should be created in the standard Android icon sizes (72x72, 48x48, 36x36) and follow the Android Icon Design Guidelines, which are available at http://developer.android.com/intl/de/guide/practices/ui_guidelines/icon_design.html.
If you are building for Android 1.6, your project folder must also contain an icon file named “Icon.png” that is a copy of"Icon-hdpi.png", in addition to the resolution-specific icon image files.
[import]uid: 9371 topic_id: 4599 reply_id: 14495[/import]