Android: How to manually add a file to apk?

Question

How do I manually add a file to an Android APK package?

Answer 1

There's a tool called aapt that is bundled with the Android SDK. You can use it to add/remove/list files in an existing apk. Run aapt without any params and it will print usage instructions. To add a file use:

aapt add MyApp.apk file1 file2 ...