Merge "Fix the selected option not saved for App List"

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/model/app/AppListViewModel.kt

@@ -51,7 +51,7 @@ internal data class AppListData<T : AppRecord>(
 }
 
 internal interface IAppListViewModel<T : AppRecord> {
-    val option: StateFlowBridge<Int?>
+    val optionFlow: MutableStateFlow<Int?>
     val spinnerOptionsFlow: Flow<List<SpinnerOption>>
     val appListDataFlow: Flow<AppListData<T>>
 }
@@ -69,7 +69,7 @@ internal open class AppListViewModelImpl<T : AppRecord>(
     val appListConfig = StateFlowBridge<AppListConfig>()
     val listModel = StateFlowBridge<AppListModel<T>>()
     val showSystem = StateFlowBridge<Boolean>()
-    final override val option = StateFlowBridge<Int?>()
+    final override val optionFlow = MutableStateFlow<Int?>(null)
     val searchQuery = StateFlowBridge<String>()
 
     private val appListRepository = appListRepositoryFactory(application)
@@ -97,7 +97,7 @@ internal open class AppListViewModelImpl<T : AppRecord>(
             listModel.getSpinnerOptions(recordList)
         }
 
-    override val appListDataFlow = option.flow.flatMapLatest(::filterAndSort)
+    override val appListDataFlow = optionFlow.filterNotNull().flatMapLatest(::filterAndSort)
         .combine(searchQuery.flow) { appListData, searchQuery ->
             appListData.filter {
                 it.label.contains(other = searchQuery, ignoreCase = true)

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/template/app/AppList.kt

@@ -24,11 +24,10 @@ import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.State
 import androidx.compose.runtime.collectAsState
-import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.Dp
@@ -37,7 +36,6 @@ import com.android.settingslib.spa.framework.compose.LogCompositions
 import com.android.settingslib.spa.framework.compose.TimeMeasurer.Companion.rememberTimeMeasurer
 import com.android.settingslib.spa.framework.compose.rememberLazyListStateAndHideKeyboardWhenStartScroll
 import com.android.settingslib.spa.framework.compose.toState
-import com.android.settingslib.spa.framework.util.StateFlowBridge
 import com.android.settingslib.spa.widget.ui.CategoryTitle
 import com.android.settingslib.spa.widget.ui.PlaceholderTitle
 import com.android.settingslib.spa.widget.ui.Spinner
@@ -52,6 +50,7 @@ import com.android.settingslib.spaprivileged.model.app.AppListViewModel
 import com.android.settingslib.spaprivileged.model.app.AppRecord
 import com.android.settingslib.spaprivileged.model.app.IAppListViewModel
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.MutableStateFlow
 
 private const val TAG = "AppList"
 private const val CONTENT_TYPE_HEADER = "header"
@@ -88,7 +87,7 @@ internal fun <T : AppRecord> AppListInput<T>.AppListImpl(
     val viewModel = viewModelSupplier()
     Column(Modifier.fillMaxSize()) {
         val optionsState = viewModel.spinnerOptionsFlow.collectAsState(null, Dispatchers.IO)
-        SpinnerOptions(optionsState, viewModel.option)
+        SpinnerOptions(optionsState, viewModel.optionFlow)
         val appListData = viewModel.appListDataFlow.collectAsState(null, Dispatchers.IO)
         listModel.AppListWidget(appListData, header, bottomPadding, noItemMessage)
     }
@@ -97,15 +96,18 @@ internal fun <T : AppRecord> AppListInput<T>.AppListImpl(
 @Composable
 private fun SpinnerOptions(
     optionsState: State<List<SpinnerOption>?>,
-    optionBridge: StateFlowBridge<Int?>,
+    optionFlow: MutableStateFlow<Int?>,
 ) {
     val options = optionsState.value
-    val selectedOption = rememberSaveable(options) {
-        mutableStateOf(options?.let { it.firstOrNull()?.id ?: -1 })
+    LaunchedEffect(options) {
+        if (options != null && !options.any { it.id == optionFlow.value }) {
+            // Reset to first option if the available options changed, and the current selected one
+            // does not in the new options.
+            optionFlow.value = options.let { it.firstOrNull()?.id ?: -1 }
+        }
     }
-    optionBridge.Sync(selectedOption)
     if (options != null) {
-        Spinner(options, selectedOption.value) { selectedOption.value = it }
+        Spinner(options, optionFlow.collectAsState().value) { optionFlow.value = it }
     }
 }
 

packages/SettingsLib/SpaPrivileged/tests/src/com/android/settingslib/spaprivileged/model/app/AppListViewModelTest.kt

@@ -56,7 +56,7 @@ class AppListViewModelTest {
         viewModel.appListConfig.setIfAbsent(CONFIG)
         viewModel.listModel.setIfAbsent(listModel)
         viewModel.showSystem.setIfAbsent(false)
-        viewModel.option.setIfAbsent(0)
+        viewModel.optionFlow.value = 0
         viewModel.searchQuery.setIfAbsent("")
         viewModel.reloadApps()
         return viewModel

packages/SettingsLib/SpaPrivileged/tests/src/com/android/settingslib/spaprivileged/template/app/AppListTest.kt

@@ -29,7 +29,6 @@ import androidx.compose.ui.unit.dp
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.android.settingslib.spa.framework.compose.toState
-import com.android.settingslib.spa.framework.util.StateFlowBridge
 import com.android.settingslib.spa.widget.ui.SpinnerOption
 import com.android.settingslib.spaprivileged.R
 import com.android.settingslib.spaprivileged.model.app.AppEntry
@@ -38,6 +37,7 @@ import com.android.settingslib.spaprivileged.model.app.AppListData
 import com.android.settingslib.spaprivileged.model.app.IAppListViewModel
 import com.android.settingslib.spaprivileged.tests.testutils.TestAppListModel
 import com.android.settingslib.spaprivileged.tests.testutils.TestAppRecord
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.flowOf
 import org.junit.Rule
 import org.junit.Test
@@ -125,7 +125,7 @@ class AppListTest {
                 bottomPadding = 0.dp,
             ).AppListImpl {
                 object : IAppListViewModel<TestAppRecord> {
-                    override val option: StateFlowBridge<Int?> = StateFlowBridge()
+                    override val optionFlow: MutableStateFlow<Int?> = MutableStateFlow(null)
                     override val spinnerOptionsFlow = flowOf(options.mapIndexed { index, option ->
                         SpinnerOption(id = index, text = option)
                     })