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Improve: Hold state on Device State Change

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Improve: Dont emit after 5 seconds of onPause() (Fix Memory Leak & Potential Crashes)
This commit is contained in:
LooKeR 2021-11-01 10:58:51 +05:30
parent 8f6429cfc1
commit 99aae396b5
2 changed files with 21 additions and 7 deletions
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8
src/main/kotlin/com/looker/droidify/screen/ProductsFragment.kt
View File

@ -50,19 +50,19 @@ class ProductsFragment() : BaseFragment(), CursorOwner.Callback {
private val searchQuery: String private val searchQuery: String
get() { get() {
var _searchQuery = "" var _searchQuery = ""
lifecycleScope.launchWhenStarted { viewModel.searchQuery.collect { _searchQuery = it } } lifecycleScope.launchWhenCreated { viewModel.searchQuery.collect { _searchQuery = it } }
return _searchQuery return _searchQuery
} }
private val section: ProductItem.Section private val section: ProductItem.Section
get() { get() {
var _section: ProductItem.Section = ProductItem.Section.All var _section: ProductItem.Section = ProductItem.Section.All
lifecycleScope.launchWhenStarted { viewModel.sections.collect { _section = it } } lifecycleScope.launchWhenCreated { viewModel.sections.collect { _section = it } }
return _section return _section
} }
private val order: ProductItem.Order private val order: ProductItem.Order
get() { get() {
var _order: ProductItem.Order = ProductItem.Order.LAST_UPDATE var _order: ProductItem.Order = ProductItem.Order.LAST_UPDATE
lifecycleScope.launchWhenStarted { viewModel.order.collect { _order = it } } lifecycleScope.launchWhenCreated { viewModel.order.collect { _order = it } }
return _order return _order
} }
@ -95,7 +95,7 @@ class ProductsFragment() : BaseFragment(), CursorOwner.Callback {
override fun onCreateView( override fun onCreateView(
inflater: LayoutInflater, inflater: LayoutInflater,
container: ViewGroup?, container: ViewGroup?,
savedInstanceState: Bundle? savedInstanceState: Bundle?,
): View { ): View {
return RecyclerView(requireContext()).apply { return RecyclerView(requireContext()).apply {
id = android.R.id.list id = android.R.id.list

20
src/main/kotlin/com/looker/droidify/ui/ProductsViewModel.kt
View File

@ -5,7 +5,9 @@ import androidx.lifecycle.viewModelScope
import com.looker.droidify.entity.ProductItem import com.looker.droidify.entity.ProductItem
import kotlinx.coroutines.Dispatchers import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.flow.MutableStateFlow import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.SharingStarted
import kotlinx.coroutines.flow.StateFlow import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.stateIn
import kotlinx.coroutines.launch import kotlinx.coroutines.launch
class ProductsViewModel : ViewModel() { class ProductsViewModel : ViewModel() {
@ -14,9 +16,21 @@ class ProductsViewModel : ViewModel() {
private val _sections = MutableStateFlow<ProductItem.Section>(ProductItem.Section.All) private val _sections = MutableStateFlow<ProductItem.Section>(ProductItem.Section.All)
private val _searchQuery = MutableStateFlow("") private val _searchQuery = MutableStateFlow("")
val order: StateFlow<ProductItem.Order> = _order val order: StateFlow<ProductItem.Order> = _order.stateIn(
val sections: StateFlow<ProductItem.Section> = _sections initialValue = ProductItem.Order.LAST_UPDATE,
val searchQuery: StateFlow<String> = _searchQuery scope = viewModelScope,
started = SharingStarted.WhileSubscribed(5000)
)
val sections: StateFlow<ProductItem.Section> = _sections.stateIn(
initialValue = ProductItem.Section.All,
scope = viewModelScope,
started = SharingStarted.WhileSubscribed(5000)
)
val searchQuery: StateFlow<String> = _searchQuery.stateIn(
initialValue = "",
scope = viewModelScope,
started = SharingStarted.WhileSubscribed(5000)
)
fun setSection(newSection: ProductItem.Section, perform: () -> Unit) { fun setSection(newSection: ProductItem.Section, perform: () -> Unit) {
viewModelScope.launch(Dispatchers.Main) { viewModelScope.launch(Dispatchers.Main) {