update CdmaApnPreferenceController

Rename it to ApnPreferenceController since it support both Gsm and
Cdma. Also add check for Gsm sim card.

Bug: 118402844
Test: RunSettingsRoboTests
Change-Id: Iafe111bfdc8f8e7d91d104df652ae9b27c9b166f

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

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2018 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 static android.provider.Telephony.Carriers.ENFORCE_MANAGED_URI;
+
+import android.content.Context;
+import android.content.Intent;
+import android.database.ContentObserver;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.PersistableBundle;
+import android.provider.Settings;
+import android.telephony.CarrierConfigManager;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.network.ApnSettings;
+import com.android.settingslib.RestrictedLockUtilsInternal;
+import com.android.settingslib.RestrictedPreference;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+/**
+ * Preference controller for "Apn settings"
+ */
+public class ApnPreferenceController extends BasePreferenceController implements
+        LifecycleObserver, OnStart, OnStop {
+
+    @VisibleForTesting
+    CarrierConfigManager mCarrierConfigManager;
+    private int mSubId;
+    private Preference mPreference;
+    private DpcApnEnforcedObserver mDpcApnEnforcedObserver;
+
+    public ApnPreferenceController(Context context, String key) {
+        super(context, key);
+        mCarrierConfigManager = new CarrierConfigManager(context);
+        mDpcApnEnforcedObserver = new DpcApnEnforcedObserver(new Handler(Looper.getMainLooper()));
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        final PersistableBundle carrierConfig = mCarrierConfigManager.getConfigForSubId(mSubId);
+        final boolean isCdmaApn = MobileNetworkUtils.isCdmaOptions(mContext, mSubId)
+                && carrierConfig.getBoolean(CarrierConfigManager.KEY_SHOW_APN_SETTING_CDMA_BOOL);
+        final boolean isGsmApn = MobileNetworkUtils.isGsmOptions(mContext, mSubId)
+                && carrierConfig.getBoolean(CarrierConfigManager.KEY_APN_EXPAND_BOOL);
+
+        return carrierConfig != null
+                && (isCdmaApn || isGsmApn)
+                ? AVAILABLE
+                : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public void onStart() {
+        mDpcApnEnforcedObserver.register(mContext);
+    }
+
+    @Override
+    public void onStop() {
+        mDpcApnEnforcedObserver.unRegister(mContext);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        ((RestrictedPreference) mPreference).setDisabledByAdmin(
+                MobileNetworkUtils.isDpcApnEnforced(mContext)
+                        ? RestrictedLockUtilsInternal.getDeviceOwner(mContext)
+                        : null);
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (getPreferenceKey().equals(preference.getKey())) {
+            // This activity runs in phone process, we must use intent to start
+            final Intent intent = new Intent(Settings.ACTION_APN_SETTINGS);
+            // This will setup the Home and Search affordance
+            intent.putExtra(SettingsActivity.EXTRA_SHOW_FRAGMENT_AS_SUBSETTING, true);
+            intent.putExtra(ApnSettings.SUB_ID, mSubId);
+            mContext.startActivity(intent);
+            return true;
+        }
+
+        return false;
+    }
+
+    public void init(int subId) {
+        mSubId = subId;
+    }
+
+    @VisibleForTesting
+    void setPreference(Preference preference) {
+        mPreference = preference;
+    }
+
+    private class DpcApnEnforcedObserver extends ContentObserver {
+        DpcApnEnforcedObserver(Handler handler) {
+            super(handler);
+        }
+
+        public void register(Context context) {
+            context.getContentResolver().registerContentObserver(ENFORCE_MANAGED_URI, false, this);
+
+        }
+
+        public void unRegister(Context context) {
+            context.getContentResolver().unregisterContentObserver(this);
+        }
+
+        @Override
+        public void onChange(boolean selfChange) {
+            updateState(mPreference);
+        }
+    }
+}