Hide MMS messages if switch mobile data automatically

Per designer's comment, hide the "MMS messages" if user cannot use it to
control MMS.

Fix: 303759893
Test: manual - turn "Switch mobile data automatically" on / off
Test: unit test
Change-Id: I874524c0cedb48f7daf87f32920e26428ae78c89

src/com/android/settings/network/SubscriptionInfoListViewModel.kt

@@ -17,37 +17,22 @@
 package com.android.settings.network
 
 import android.app.Application
-import android.telephony.SubscriptionInfo
 import android.telephony.SubscriptionManager
-
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
-
+import com.android.settings.network.telephony.subscriptionsChangedFlow
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.asExecutor
-import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.SharingStarted
-import kotlinx.coroutines.flow.callbackFlow
-import kotlinx.coroutines.flow.conflate
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.plus
 
 class SubscriptionInfoListViewModel(application: Application) : AndroidViewModel(application) {
+    private val subscriptionManager =
+        application.getSystemService(SubscriptionManager::class.java)!!
     private val scope = viewModelScope + Dispatchers.Default
-    val subscriptionInfoListFlow = callbackFlow<List<SubscriptionInfo>> {
-        val subscriptionManager = application.getSystemService(SubscriptionManager::class.java)!!
 
-        val listener = object : SubscriptionManager.OnSubscriptionsChangedListener() {
-            override fun onSubscriptionsChanged() {
-                trySend(SubscriptionUtil.getActiveSubscriptions(subscriptionManager))
-            }
-        }
-
-        subscriptionManager.addOnSubscriptionsChangedListener(
-            Dispatchers.Default.asExecutor(),
-            listener,
-        )
-
-        awaitClose { subscriptionManager.removeOnSubscriptionsChangedListener(listener) }
-    }.conflate().stateIn(scope, SharingStarted.Eagerly, initialValue = emptyList())
+    val subscriptionInfoListFlow = application.subscriptionsChangedFlow().map {
+        SubscriptionUtil.getActiveSubscriptions(subscriptionManager)
+    }.stateIn(scope, SharingStarted.Eagerly, initialValue = emptyList())
 }

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

@@ -17,33 +17,25 @@
 package com.android.settings.network.telephony
 
 import android.content.Context
-import android.os.Handler
-import android.os.Looper
 import android.telephony.SubscriptionManager
 import android.telephony.TelephonyManager
 import android.telephony.data.ApnSetting
-import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
 import androidx.preference.PreferenceScreen
-import com.android.settings.network.MobileDataContentObserver
+import com.android.settings.network.mobileDataEnabledFlow
+import com.android.settingslib.spa.framework.util.collectLatestWithLifecycle
+import kotlinx.coroutines.flow.combine
 
 /**
  * Preference controller for "MMS messages"
  */
 class MmsMessagePreferenceController(context: Context, key: String) :
-    TelephonyTogglePreferenceController(context, key), DefaultLifecycleObserver {
+    TelephonyTogglePreferenceController(context, key) {
 
     private lateinit var telephonyManager: TelephonyManager
 
     private var preferenceScreen: PreferenceScreen? = null
 
-    private val mobileDataContentObserver =
-        MobileDataContentObserver(Handler(Looper.getMainLooper())).apply {
-            setOnMobileDataChangedListener {
-                preferenceScreen?.let { super.displayPreference(it) }
-            }
-        }
-
     fun init(subId: Int) {
         mSubId = subId
         telephonyManager = mContext.getSystemService(TelephonyManager::class.java)!!
@@ -53,26 +45,25 @@ class MmsMessagePreferenceController(context: Context, key: String) :
     override fun getAvailabilityStatus(subId: Int) =
         if (subId != SubscriptionManager.INVALID_SUBSCRIPTION_ID &&
             !telephonyManager.isDataEnabled &&
-            telephonyManager.isApnMetered(ApnSetting.TYPE_MMS)
+            telephonyManager.isApnMetered(ApnSetting.TYPE_MMS) &&
+            !telephonyManager.isMobileDataPolicyEnabled(
+                TelephonyManager.MOBILE_DATA_POLICY_AUTO_DATA_SWITCH
+            )
         ) AVAILABLE else CONDITIONALLY_UNAVAILABLE
 
-    override fun onStart(owner: LifecycleOwner) {
-        if (mSubId != SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
-            mobileDataContentObserver.register(mContext, mSubId)
-        }
-    }
-
-    override fun onStop(owner: LifecycleOwner) {
-        if (mSubId != SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
-            mobileDataContentObserver.unRegister(mContext)
-        }
-    }
-
     override fun displayPreference(screen: PreferenceScreen) {
         super.displayPreference(screen)
         preferenceScreen = screen
     }
 
+    override fun onViewCreated(viewLifecycleOwner: LifecycleOwner) {
+        combine(
+            mContext.mobileDataEnabledFlow(mSubId),
+            mContext.subscriptionsChangedFlow(), // Capture isMobileDataPolicyEnabled() changes
+        ) { _, _ -> }.collectLatestWithLifecycle(viewLifecycleOwner) {
+            preferenceScreen?.let { super.displayPreference(it) } }
+    }
+
     override fun isChecked(): Boolean = telephonyManager.isMobileDataPolicyEnabled(
         TelephonyManager.MOBILE_DATA_POLICY_MMS_ALWAYS_ALLOWED
     )

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

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.network.telephony
+
+import android.content.Context
+import android.telephony.SubscriptionManager
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.asExecutor
+import kotlinx.coroutines.channels.awaitClose
+import kotlinx.coroutines.flow.callbackFlow
+import kotlinx.coroutines.flow.conflate
+import kotlinx.coroutines.flow.flowOn
+
+fun Context.subscriptionsChangedFlow() = callbackFlow {
+    val subscriptionManager = getSystemService(SubscriptionManager::class.java)!!
+
+    val listener = object : SubscriptionManager.OnSubscriptionsChangedListener() {
+        override fun onSubscriptionsChanged() {
+            trySend(Unit)
+        }
+    }
+
+    subscriptionManager.addOnSubscriptionsChangedListener(
+        Dispatchers.Default.asExecutor(),
+        listener,
+    )
+
+    awaitClose { subscriptionManager.removeOnSubscriptionsChangedListener(listener) }
+}.conflate().flowOn(Dispatchers.Default)