Chapter 4.  Building an Audio Player Application

In this chapter, we move back to native Xamarin. We will integrate native audio functions for processing a sound file using the AVFramework in iOS with the AVAudioSessions, AVAudioSettings, and AVAudioRecorder objects. In Android you will use the MediaPlayer object from the Android.Media library.

Expected knowledge:

• Some knowledge of either iOS AVAudioSessions, AVAudioSettings, and AVAudioRecorder, or the Android MediaPlayer and MediaRecorder classes
• NSLayoutConstraints

In this chapter, you will learn the following:

• Project setup
• Inversion of control with MVVMCross
• View models with Xamarin native
• Creating the bindings
• NSLayoutContraints
• MVVMCross setup inside the Portable Class Library
• Setting up MVVMCross with iOS
• Setting up MVVMCross with Android
• The SoundHandler interface
• Implementing the iOS SoundHandler using the AVAudioPlayer framework
• The Mvx IoC container
• The audio player
• A cleaner code approach to NSLayout
• Creating AudioPlayerPageViewModel
• Implementing the Android SoundHandler using the MediaPlayer framework
• XML and Mvx bindings