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[Android] Improve performance when listing big credentials (#41)
This PR adds a CredentialPackViewModel to solve performance issues with large credentials.
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54 changes: 54 additions & 0 deletions
54
example/src/main/java/com/spruceid/mobilesdkexample/viewmodels/CredentialPacksViewModel.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package com.spruceid.mobilesdkexample.viewmodels | ||
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| import StorageManager | ||
| import android.app.Application | ||
| import android.content.Context | ||
| import androidx.compose.runtime.toMutableStateList | ||
| import androidx.lifecycle.AndroidViewModel | ||
| import androidx.lifecycle.ViewModel | ||
| import androidx.lifecycle.ViewModelProvider | ||
| import androidx.lifecycle.viewModelScope | ||
| import com.spruceid.mobile.sdk.CredentialPack | ||
| import kotlinx.coroutines.flow.MutableStateFlow | ||
| import kotlinx.coroutines.flow.asStateFlow | ||
| import kotlinx.coroutines.launch | ||
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| class CredentialPacksViewModel(application: Application) : AndroidViewModel(application) { | ||
| private val storageManager = StorageManager(context = (application as Context)) | ||
| private val _credentialPacks = MutableStateFlow(listOf<CredentialPack>()) | ||
| val credentialPacks = _credentialPacks.asStateFlow() | ||
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| init { | ||
| viewModelScope.launch { | ||
| _credentialPacks.value = CredentialPack.loadPacks(storageManager) | ||
| } | ||
| } | ||
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| fun saveCredentialPack(credentialPack: CredentialPack) { | ||
| credentialPack.save(storageManager) | ||
| val tmpCredentialPacksList = _credentialPacks.value.toMutableStateList() | ||
| tmpCredentialPacksList.add(credentialPack) | ||
| _credentialPacks.value = tmpCredentialPacksList | ||
| } | ||
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| fun deleteAllCredentialPacks() { | ||
| _credentialPacks.value.forEach { credentialPack -> | ||
| credentialPack.remove(storageManager) | ||
| } | ||
| _credentialPacks.value = emptyList() | ||
| } | ||
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| fun deleteCredentialPack(credentialPack: CredentialPack) { | ||
| credentialPack.remove(storageManager) | ||
| val tmpCredentialPacksList = _credentialPacks.value.toMutableStateList() | ||
| tmpCredentialPacksList.remove(credentialPack) | ||
| _credentialPacks.value = tmpCredentialPacksList | ||
| } | ||
| } | ||
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| class CredentialPacksViewModelFactory(private val application: Application) : | ||
| ViewModelProvider.NewInstanceFactory() { | ||
| @Suppress("UNCHECKED_CAST") | ||
| override fun <T : ViewModel> create(modelClass: Class<T>): T = | ||
| CredentialPacksViewModel(application) as T | ||
| } |
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