New isSubscriptionVisibleFlow

Use this instead of mSubscriptionInfoEntity, so MobileNetworkSettings
not closed unexpectedly.

Bug: 358238959
Flag: EXEMPT bug fix
Test: force stop settings & settings search - mobile settings
Test: adb shell am start -a android.settings.NETWORK_OPERATOR_SETTINGS
Change-Id: I34286da808600d8b9faa0da85a59665707ecfde3

src/com/android/settings/network/telephony/MobileNetworkSettings.java

@@ -41,6 +41,7 @@ import android.view.View;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.preference.Preference;
 
@@ -66,6 +67,8 @@ import com.android.settingslib.mobile.dataservice.SubscriptionInfoEntity;
 import com.android.settingslib.search.SearchIndexable;
 import com.android.settingslib.utils.ThreadUtils;
 
+import kotlin.Unit;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -359,6 +362,16 @@ public class MobileNetworkSettings extends AbstractMobileNetworkSettings impleme
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         collectAirplaneModeAndFinishIfOn(this);
+
+        LifecycleOwner viewLifecycleOwner = getViewLifecycleOwner();
+        new SubscriptionRepository(requireContext())
+                .collectSubscriptionVisible(mSubId, viewLifecycleOwner, (isVisible) -> {
+                    if (!isVisible) {
+                        Log.d(LOG_TAG, "Due to subscription not visible, closes page");
+                        finishFragment();
+                    }
+                    return Unit.INSTANCE;
+                });
     }
 
     @Override
@@ -532,11 +545,6 @@ public class MobileNetworkSettings extends AbstractMobileNetworkSettings impleme
                 Log.d(LOG_TAG, "Set subInfo to default subInfo.");
             }
         }
-        if (mSubscriptionInfoEntity == null && getActivity() != null) {
-            // If the current subId is not existed, finish it.
-            finishFragment();
-            return;
-        }
         onSubscriptionDetailChanged();
     }
 }

src/com/android/settings/network/telephony/SubscriptionRepository.kt

@@ -50,6 +50,31 @@ class SubscriptionRepository(private val context: Context) {
     fun getSelectableSubscriptionInfoList(): List<SubscriptionInfo> =
         context.getSelectableSubscriptionInfoList()
 
+    /** Flow of whether the subscription visible for the given [subId]. */
+    fun isSubscriptionVisibleFlow(subId: Int): Flow<Boolean> {
+        return subscriptionsChangedFlow()
+            .map {
+                val subInfo =
+                    subscriptionManager.availableSubscriptionInfoList?.firstOrNull { subInfo ->
+                        subInfo.subscriptionId == subId
+                    }
+                subInfo != null &&
+                    SubscriptionUtil.isSubscriptionVisible(subscriptionManager, context, subInfo)
+            }
+            .conflate()
+            .onEach { Log.d(TAG, "[$subId] isSubscriptionVisibleFlow: $it") }
+            .flowOn(Dispatchers.Default)
+    }
+
+    /** TODO: Move this to UI layer, when UI layer migrated to Kotlin. */
+    fun collectSubscriptionVisible(
+        subId: Int,
+        lifecycleOwner: LifecycleOwner,
+        action: (Boolean) -> Unit,
+    ) {
+        isSubscriptionVisibleFlow(subId).collectLatestWithLifecycle(lifecycleOwner, action = action)
+    }
+
     /** Flow of whether the subscription enabled for the given [subId]. */
     fun isSubscriptionEnabledFlow(subId: Int): Flow<Boolean> {
         if (!SubscriptionManager.isValidSubscriptionId(subId)) return flowOf(false)

tests/spa_unit/src/com/android/settings/network/telephony/SubscriptionRepositoryTest.kt

@@ -189,6 +189,32 @@ class SubscriptionRepositoryTest {
         assertThat(subInfos.map { it.subscriptionId }).containsExactly(SUB_ID_3_NOT_IN_SLOT)
     }
 
+    @Test
+    fun isSubscriptionVisibleFlow_available_returnTrue() = runBlocking {
+        mockSubscriptionManager.stub {
+            on { getAvailableSubscriptionInfoList() } doReturn
+                listOf(SubscriptionInfo.Builder().apply { setId(SUB_ID_IN_SLOT_0) }.build())
+        }
+
+        val isVisible =
+            repository.isSubscriptionVisibleFlow(SUB_ID_IN_SLOT_0).firstWithTimeoutOrNull()
+
+        assertThat(isVisible).isTrue()
+    }
+
+    @Test
+    fun isSubscriptionVisibleFlow_unavailable_returnFalse() = runBlocking {
+        mockSubscriptionManager.stub {
+            on { getAvailableSubscriptionInfoList() } doReturn
+                listOf(SubscriptionInfo.Builder().apply { setId(SUB_ID_IN_SLOT_0) }.build())
+        }
+
+        val isVisible =
+            repository.isSubscriptionVisibleFlow(SUB_ID_IN_SLOT_1).firstWithTimeoutOrNull()
+
+        assertThat(isVisible).isFalse()
+    }
+
     @Test
     fun phoneNumberFlow() = runBlocking {
         mockSubscriptionManager.stub {