This is a lesson on Android’s MediaPlayer class and the Activity Lifecycle. If you teach Android Development, Mobile App Development, Kotlin Programming, ICT, Computer Science, or App Design, this lesson provides everything you need for students to build functional, modern media apps that follow best practices. Learners are guided step-by-step through playing audio files, controlling playback, adding UI components like Play, Pause, and SeekBar, updating progress using coroutines, and corre