Is there a way to access the android activity if the host platform is android

[Neerajsh8851]

I have a WalletComponent in which there is an action 'startPurchase()' Its implementation uses Google Play billing that requires the Android activity context.

Is there a similar way as my imaginary code below

// inside the WalletCompoent.startPurchase()

val host = cmpContext.getHostPlatform()
if (host.platform is Activity) { 
// impl using acitvity
}

[arkivanov]

If you only support Android, then you can easily pass (or inject) Activity via component constructors. If your are using Kotlin Multiplatform, then you can probably leverage Inversion of Control (IoC): create an interface with platform-specific implementations, where the Android impl would depend on Activity.

All the above options assume that you are not using retained components.

[Neerajsh8851]

That means I must create an Interface like PlatformHostProvider and then pass it to the component constructor.

[arkivanov]

I think you still need to perform purchases in a platform-specific way (your // impl using acitvity comment). Looks like you can extract an interface for purchases, or something similar. Maybe something along the lines:

// commonMain
interface PurchaseManager {
    fun purchase(...)
}

//androidMain
class AndroidPurchaseManager(activity: Activity) : PurchaseManager {
    override fun purchase(...) { ... }
}

And then pass PurchaseManager in your WalletCompoent. Just an idea.

[Neerajsh8851]

Creating an interface for PurcahseManager make sense, thanks.