GitHub - codenameone/CodenameOne: Cross-platform framework for building truly native mobile apps with Java or Kotlin. Write Once Run Anywhere support for iOS, Android, Desktop & Web.
Sending simple data to other apps | Android Developers
The Android Arsenal - Audio - Free libraries and tools for Android
Migrating Apps from Java to Kotlin (Kotlin vs. Java) | Krasamo
Android Audio, Radio frequency and Spectrum Analyzer - SciChart