CODEWITHSUNDEEP
androidkotlindependency-injectionkoinkoin-scope
Atif AbbAsi
Atif AbbAsi

Reputation: 6037

How to inject view model with scope using sharedview model koin android

need little bit clarity on one thing, right now working on a flow where I've two view model and one is dependent on other , to handle that thing I tried injecting both view models in my Base Activity the problem I faced, with this approach. Every time when I try to access those view model, Base Activity was returning me new instances, is there any way I can manage scope of that view model so I can easily access its properties without adding extra Api calls.

Module Class

    val homeModule= module {
      
        single { HomeDispatcher(get(), get()) }
        viewModel { HomeViewModel (get()) }
    }

**Main Activity**

    import org.koin.android.viewmodel.ext.android.viewModel

        class NotificationActivity : BaseActivity() {
        
           private val viewModel: HomeViewModel by inject()
        
           private val viewModel: HomeViewModel by viewModel()
    }
    
    
    
        class NotificationsFragment : BaseFragment() {
        
           private val viewModel: HomeViewModel by viewModels({requireActivity()})
    
           private val viewModelx: HomeViewModel by activityViewModels
    
    
        
        }

> by using viewModels({requireActivity()}) getting instance not found.

Update for Hilt

   implementation "androidx.activity:activity-ktx:1.2.0"

   private val viewModelx: HomeViewModel by viewModels

the above-mentioned library has view models for injecting view models directly lazily.

Upvotes: 2

Views: 3485

Answers (2)

Atif AbbAsi
Atif AbbAsi

Reputation: 6037

import org.koin.android.viewmodel.ext.android.viewModel
import org.koin.android.viewmodel.ext.android.sharedViewModel 

private val viewModel: HomeViewModel by viewModel()

so solved this issue by using viewModel() in activity and sharedViewModel<MyViewModel>() in fragment class

Upvotes: 4

Muhammad Ahmed
Muhammad Ahmed

Reputation: 21

You need to give context in koin module

val appModule = module {
single { HomeViewModel (get()) } // it will get the context from Application Context
   
}

In activity you want to use just use

private val viewModel: HomeViewModel by inject()

it will return the single instance of your viewModel

Upvotes: 2

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