115: Architecture Components with Akshay Chordiya

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In this episode, we talk about the different parts of Android architecture components. We’ve had episodes on Room and the paging library, so in this one, we thought we’ll touch a little on Lifecycle Owners & Observers, ViewModels, and LiveData. Akshay Chordiya helps break it down. Listen on!

Show Notes

• Android Architecture Components

Lifecycle

• Handling lifecycles with Lifecycle-Aware Components
• Lifecycle Owner
• Lifecycle Observer
• Best practices for lifecycle-aware components
• Caveat: handling onStop events

ViewModels

• Architecture Guide: ViewModels
• View Model

Code snippet for a ViewModelFactory:

class UserVMFactory(
        val user: MyUser
) : ViewModelProvider.Factory {
    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
        return when {
            modelClass.isAssignableFrom(UserVM::class.java) ->
                UserVM(user) as T
            else -> throw IllegalArgumentException("Unknown ViewModel class")
        }
    }
}

LiveData

• Live Data
• MediatorLiveData

Misc

• Android Architecture Components Deep Dive Course on Caster.IO
• Fragmented – Room episode with Florina
• Fragmented – AAC Paging library with Florina

Sponsors

• Microsoft AppCenter – Sign up now on appcenter.ms and spend less time managing your app lifecycle and more time coding.

Contact

• @Akshay_Chordiya [twitter.com]
• @fragmentedcast [twitter.com]
• @donnfelker and 📷 donnfelker
• @kaushikgopal and 📷 kaushikgopal