src/com/android/settings/ApnSettings.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2008 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;

 import android.app.Activity;
 import android.app.Dialog;
 import android.app.ProgressDialog;
 import android.content.BroadcastReceiver;
 import android.content.ContentResolver;
 import android.content.ContentUris;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Looper;
 import android.os.Message;
 import android.os.PersistableBundle;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Telephony;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceGroup;
 import android.support.v7.preference.PreferenceScreen;
 import android.telephony.CarrierConfigManager;
 import android.telephony.SubscriptionInfo;
 import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.MotionEvent;
 import android.widget.TextView;
 import android.widget.Toast;

 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.internal.telephony.PhoneConstants;
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.internal.telephony.dataconnection.ApnSetting;
 import com.android.internal.telephony.uicc.IccRecords;
 import com.android.internal.telephony.uicc.UiccController;
 import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;

 import java.util.ArrayList;

 public class ApnSettings extends RestrictedSettingsFragment implements
         Preference.OnPreferenceChangeListener {
     static final String TAG = "ApnSettings";

     public static final String EXTRA_POSITION = "position";
     public static final String RESTORE_CARRIERS_URI =
         "content://telephony/carriers/restore";
     public static final String PREFERRED_APN_URI =
         "content://telephony/carriers/preferapn";

     public static final String APN_ID = "apn_id";
     public static final String SUB_ID = "sub_id";
     public static final String MVNO_TYPE = "mvno_type";
     public static final String MVNO_MATCH_DATA = "mvno_match_data";

     private static final int ID_INDEX = 0;
     private static final int NAME_INDEX = 1;
     private static final int APN_INDEX = 2;
     private static final int TYPES_INDEX = 3;
     private static final int MVNO_TYPE_INDEX = 4;
     private static final int MVNO_MATCH_DATA_INDEX = 5;

     private static final int MENU_NEW = Menu.FIRST;
     private static final int MENU_RESTORE = Menu.FIRST + 1;

     private static final int EVENT_RESTORE_DEFAULTAPN_START = 1;
     private static final int EVENT_RESTORE_DEFAULTAPN_COMPLETE = 2;

     private static final int DIALOG_RESTORE_DEFAULTAPN = 1001;

     private static final Uri DEFAULTAPN_URI = Uri.parse(RESTORE_CARRIERS_URI);
     private static final Uri PREFERAPN_URI = Uri.parse(PREFERRED_APN_URI);

     private static boolean mRestoreDefaultApnMode;

     private UserManager mUserManager;
     private RestoreApnUiHandler mRestoreApnUiHandler;
     private RestoreApnProcessHandler mRestoreApnProcessHandler;
     private HandlerThread mRestoreDefaultApnThread;
     private SubscriptionInfo mSubscriptionInfo;
     private UiccController mUiccController;
     private String mMvnoType;
     private String mMvnoMatchData;

     private String mSelectedKey;

     private IntentFilter mMobileStateFilter;

     private boolean mUnavailable;

     private boolean mHideImsApn;
     private boolean mAllowAddingApns;

     public ApnSettings() {
         super(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS);
     }

     private final BroadcastReceiver mMobileStateReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             if (intent.getAction().equals(
                     TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED)) {
                 PhoneConstants.DataState state = getMobileDataState(intent);
                 switch (state) {
                 case CONNECTED:
                     if (!mRestoreDefaultApnMode) {
                         fillList();
                     } else {
                         showDialog(DIALOG_RESTORE_DEFAULTAPN);
                     }
                     break;
                 }
             }
         }
     };

     private static PhoneConstants.DataState getMobileDataState(Intent intent) {
         String str = intent.getStringExtra(PhoneConstants.STATE_KEY);
         if (str != null) {
             return Enum.valueOf(PhoneConstants.DataState.class, str);
         } else {
             return PhoneConstants.DataState.DISCONNECTED;
         }
     }

     @Override
     public int getMetricsCategory() {
         return MetricsEvent.APN;
     }

     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
         final Activity activity = getActivity();
         final int subId = activity.getIntent().getIntExtra(SUB_ID,
                 SubscriptionManager.INVALID_SUBSCRIPTION_ID);

         mMobileStateFilter = new IntentFilter(
                 TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED);

         setIfOnlyAvailableForAdmins(true);

         mSubscriptionInfo = SubscriptionManager.from(activity).getActiveSubscriptionInfo(subId);
         mUiccController = UiccController.getInstance();

         CarrierConfigManager configManager = (CarrierConfigManager)
                 getSystemService(Context.CARRIER_CONFIG_SERVICE);
         PersistableBundle b = configManager.getConfig();
         mHideImsApn = b.getBoolean(CarrierConfigManager.KEY_HIDE_IMS_APN_BOOL);
         mAllowAddingApns = b.getBoolean(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL);
         if (mAllowAddingApns) {
             String[] readOnlyApnTypes = b.getStringArray(
                     CarrierConfigManager.KEY_READ_ONLY_APN_TYPES_STRING_ARRAY);
             // if no apn type can be edited, do not allow adding APNs
             if (ApnEditor.hasAllApns(readOnlyApnTypes)) {
                 Log.d(TAG, "not allowing adding APN because all APN types are read only");
                 mAllowAddingApns = false;
             }
         }
         mUserManager = UserManager.get(activity);
     }

     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);

         getEmptyTextView().setText(R.string.apn_settings_not_available);
         mUnavailable = isUiRestricted();
         setHasOptionsMenu(!mUnavailable);
         if (mUnavailable) {
             addPreferencesFromResource(R.xml.placeholder_prefs);
             return;
         }

         addPreferencesFromResource(R.xml.apn_settings);
     }

     @Override
     public void onResume() {
         super.onResume();

         if (mUnavailable) {
             return;
         }

         getActivity().registerReceiver(mMobileStateReceiver, mMobileStateFilter);

         if (!mRestoreDefaultApnMode) {
             fillList();
         }
     }

     @Override
     public void onPause() {
         super.onPause();

         if (mUnavailable) {
             return;
         }

         getActivity().unregisterReceiver(mMobileStateReceiver);
     }

     @Override
     public void onDestroy() {
         super.onDestroy();

         if (mRestoreDefaultApnThread != null) {
             mRestoreDefaultApnThread.quit();
         }
     }

     @Override
     public EnforcedAdmin getRestrictionEnforcedAdmin() {
         final UserHandle user = UserHandle.of(mUserManager.getUserHandle());
         if (mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS, user)
                 && !mUserManager.hasBaseUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS,
                         user)) {
             return EnforcedAdmin.MULTIPLE_ENFORCED_ADMIN;
         }
         return null;
     }

     private void fillList() {
         final TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
         final int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId()
                 : SubscriptionManager.INVALID_SUBSCRIPTION_ID;
         final String mccmnc = mSubscriptionInfo == null ? "" : tm.getSimOperator(subId);
         Log.d(TAG, "mccmnc = " + mccmnc);
         StringBuilder where = new StringBuilder("numeric=\"" + mccmnc +
                 "\" AND NOT (type='ia' AND (apn=\"\" OR apn IS NULL)) AND user_visible!=0");

         if (mHideImsApn) {
             where.append(" AND NOT (type='ims')");
         }

         Cursor cursor = getContentResolver().query(Telephony.Carriers.CONTENT_URI, new String[] {
                 "_id", "name", "apn", "type", "mvno_type", "mvno_match_data"}, where.toString(),
                 null, Telephony.Carriers.DEFAULT_SORT_ORDER);

         if (cursor != null) {
             IccRecords r = null;
             if (mUiccController != null && mSubscriptionInfo != null) {
                 r = mUiccController.getIccRecords(
                         SubscriptionManager.getPhoneId(subId), UiccController.APP_FAM_3GPP);
             }
             PreferenceGroup apnList = (PreferenceGroup) findPreference("apn_list");
             apnList.removeAll();

             ArrayList<ApnPreference> mnoApnList = new ArrayList<ApnPreference>();
             ArrayList<ApnPreference> mvnoApnList = new ArrayList<ApnPreference>();
             ArrayList<ApnPreference> mnoMmsApnList = new ArrayList<ApnPreference>();
             ArrayList<ApnPreference> mvnoMmsApnList = new ArrayList<ApnPreference>();

             mSelectedKey = getSelectedApnKey();
             cursor.moveToFirst();
             while (!cursor.isAfterLast()) {
                 String name = cursor.getString(NAME_INDEX);
                 String apn = cursor.getString(APN_INDEX);
                 String key = cursor.getString(ID_INDEX);
                 String type = cursor.getString(TYPES_INDEX);
                 String mvnoType = cursor.getString(MVNO_TYPE_INDEX);
                 String mvnoMatchData = cursor.getString(MVNO_MATCH_DATA_INDEX);

                 ApnPreference pref = new ApnPreference(getPrefContext());

                 pref.setKey(key);
                 pref.setTitle(name);
                 pref.setSummary(apn);
                 pref.setPersistent(false);
                 pref.setOnPreferenceChangeListener(this);
                 pref.setSubId(subId);

                 boolean selectable = ((type == null) || !type.equals("mms"));
                 pref.setSelectable(selectable);
                 if (selectable) {
                     if ((mSelectedKey != null) && mSelectedKey.equals(key)) {
                         pref.setChecked();
                     }
                     addApnToList(pref, mnoApnList, mvnoApnList, r, mvnoType, mvnoMatchData);
                 } else {
                     addApnToList(pref, mnoMmsApnList, mvnoMmsApnList, r, mvnoType, mvnoMatchData);
                 }
                 cursor.moveToNext();
             }
             cursor.close();

             if (!mvnoApnList.isEmpty()) {
                 mnoApnList = mvnoApnList;
                 mnoMmsApnList = mvnoMmsApnList;

                 // Also save the mvno info
             }

             for (Preference preference : mnoApnList) {
                 apnList.addPreference(preference);
             }
             for (Preference preference : mnoMmsApnList) {
                 apnList.addPreference(preference);
             }
         }
     }

     private void addApnToList(ApnPreference pref, ArrayList<ApnPreference> mnoList,
                               ArrayList<ApnPreference> mvnoList, IccRecords r, String mvnoType,
                               String mvnoMatchData) {
         if (r != null && !TextUtils.isEmpty(mvnoType) && !TextUtils.isEmpty(mvnoMatchData)) {
             if (ApnSetting.mvnoMatches(r, mvnoType, mvnoMatchData)) {
                 mvnoList.add(pref);
                 // Since adding to mvno list, save mvno info
                 mMvnoType = mvnoType;
                 mMvnoMatchData = mvnoMatchData;
             }
         } else {
             mnoList.add(pref);
         }
     }

     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         if (!mUnavailable) {
             if (mAllowAddingApns) {
                 menu.add(0, MENU_NEW, 0,
                         getResources().getString(R.string.menu_new))
                         .setIcon(R.drawable.ic_menu_add_white)
                         .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
             }
             menu.add(0, MENU_RESTORE, 0,
                     getResources().getString(R.string.menu_restore))
                     .setIcon(android.R.drawable.ic_menu_upload);
         }

         super.onCreateOptionsMenu(menu, inflater);
     }

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
         case MENU_NEW:
             addNewApn();
             return true;

         case MENU_RESTORE:
             restoreDefaultApn();
             return true;
         }
         return super.onOptionsItemSelected(item);
     }

     private void addNewApn() {
         Intent intent = new Intent(Intent.ACTION_INSERT, Telephony.Carriers.CONTENT_URI);
         int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId()
                 : SubscriptionManager.INVALID_SUBSCRIPTION_ID;
         intent.putExtra(SUB_ID, subId);
         if (!TextUtils.isEmpty(mMvnoType) && !TextUtils.isEmpty(mMvnoMatchData)) {
             intent.putExtra(MVNO_TYPE, mMvnoType);
             intent.putExtra(MVNO_MATCH_DATA, mMvnoMatchData);
         }
         startActivity(intent);
     }

     @Override
     public boolean onPreferenceTreeClick(Preference preference) {
         int pos = Integer.parseInt(preference.getKey());
         Uri url = ContentUris.withAppendedId(Telephony.Carriers.CONTENT_URI, pos);
         startActivity(new Intent(Intent.ACTION_EDIT, url));
         return true;
     }

     public boolean onPreferenceChange(Preference preference, Object newValue) {
         Log.d(TAG, "onPreferenceChange(): Preference - " + preference
                 + ", newValue - " + newValue + ", newValue type - "
                 + newValue.getClass());
         if (newValue instanceof String) {
             setSelectedApnKey((String) newValue);
         }

         return true;
     }

     private void setSelectedApnKey(String key) {
         mSelectedKey = key;
         ContentResolver resolver = getContentResolver();

         ContentValues values = new ContentValues();
         values.put(APN_ID, mSelectedKey);
         resolver.update(getUriForCurrSubId(PREFERAPN_URI), values, null, null);
     }

     private String getSelectedApnKey() {
         String key = null;

         Cursor cursor = getContentResolver().query(getUriForCurrSubId(PREFERAPN_URI),
                 new String[] {"_id"}, null, null, Telephony.Carriers.DEFAULT_SORT_ORDER);
         if (cursor.getCount() > 0) {
             cursor.moveToFirst();
             key = cursor.getString(ID_INDEX);
         }
         cursor.close();
         return key;
     }

     private boolean restoreDefaultApn() {
         showDialog(DIALOG_RESTORE_DEFAULTAPN);
         mRestoreDefaultApnMode = true;

         if (mRestoreApnUiHandler == null) {
             mRestoreApnUiHandler = new RestoreApnUiHandler();
         }

         if (mRestoreApnProcessHandler == null ||
             mRestoreDefaultApnThread == null) {
             mRestoreDefaultApnThread = new HandlerThread(
                     "Restore default APN Handler: Process Thread");
             mRestoreDefaultApnThread.start();
             mRestoreApnProcessHandler = new RestoreApnProcessHandler(
                     mRestoreDefaultApnThread.getLooper(), mRestoreApnUiHandler);
         }

         mRestoreApnProcessHandler
                 .sendEmptyMessage(EVENT_RESTORE_DEFAULTAPN_START);
         return true;
     }

     // Append subId to the Uri
     private Uri getUriForCurrSubId(Uri uri) {
         int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId()
                 : SubscriptionManager.INVALID_SUBSCRIPTION_ID;
         if (SubscriptionManager.isValidSubscriptionId(subId)) {
             return Uri.withAppendedPath(uri, "subId/" + String.valueOf(subId));
         } else {
             return uri;
         }
     }

     private class RestoreApnUiHandler extends Handler {
         @Override
         public void handleMessage(Message msg) {
             switch (msg.what) {
                 case EVENT_RESTORE_DEFAULTAPN_COMPLETE:
                     Activity activity = getActivity();
                     if (activity == null) {
                         mRestoreDefaultApnMode = false;
                         return;
                     }
                     fillList();
                     getPreferenceScreen().setEnabled(true);
                     mRestoreDefaultApnMode = false;
                     removeDialog(DIALOG_RESTORE_DEFAULTAPN);
                     Toast.makeText(
                         activity,
                         getResources().getString(
                                 R.string.restore_default_apn_completed),
                         Toast.LENGTH_LONG).show();
                     break;
             }
         }
     }

     private class RestoreApnProcessHandler extends Handler {
         private Handler mRestoreApnUiHandler;

         public RestoreApnProcessHandler(Looper looper, Handler restoreApnUiHandler) {
             super(looper);
             this.mRestoreApnUiHandler = restoreApnUiHandler;
         }

         @Override
         public void handleMessage(Message msg) {
             switch (msg.what) {
                 case EVENT_RESTORE_DEFAULTAPN_START:
                     ContentResolver resolver = getContentResolver();
                     resolver.delete(getUriForCurrSubId(DEFAULTAPN_URI), null, null);
                     mRestoreApnUiHandler
                         .sendEmptyMessage(EVENT_RESTORE_DEFAULTAPN_COMPLETE);
                     break;
             }
         }
     }

     @Override
     public Dialog onCreateDialog(int id) {
         if (id == DIALOG_RESTORE_DEFAULTAPN) {
             ProgressDialog dialog = new ProgressDialog(getActivity()) {
                 public boolean onTouchEvent(MotionEvent event) {
                     return true;
                 }
             };
             dialog.setMessage(getResources().getString(R.string.restore_default_apn));
             dialog.setCancelable(false);
             return dialog;
         }
         return null;
     }

     @Override
     public int getDialogMetricsCategory(int dialogId) {
         if (dialogId == DIALOG_RESTORE_DEFAULTAPN) {
             return MetricsEvent.DIALOG_APN_RESTORE_DEFAULT;
         }
         return 0;
     }
 }
	/*
	* Copyright (C) 2008 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;

	import android.app.Activity;
	import android.app.Dialog;
	import android.app.ProgressDialog;
	import android.content.BroadcastReceiver;
	import android.content.ContentResolver;
	import android.content.ContentUris;
	import android.content.ContentValues;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.database.Cursor;
	import android.net.Uri;
	import android.os.Bundle;
	import android.os.Handler;
	import android.os.HandlerThread;
	import android.os.Looper;
	import android.os.Message;
	import android.os.PersistableBundle;
	import android.os.UserHandle;
	import android.os.UserManager;
	import android.provider.Telephony;
	import android.support.v7.preference.Preference;
	import android.support.v7.preference.PreferenceGroup;
	import android.support.v7.preference.PreferenceScreen;
	import android.telephony.CarrierConfigManager;
	import android.telephony.SubscriptionInfo;
	import android.telephony.SubscriptionManager;
	import android.telephony.TelephonyManager;
	import android.text.TextUtils;
	import android.util.Log;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.MotionEvent;
	import android.widget.TextView;
	import android.widget.Toast;

	import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
	import com.android.internal.telephony.PhoneConstants;
	import com.android.internal.telephony.TelephonyIntents;
	import com.android.internal.telephony.dataconnection.ApnSetting;
	import com.android.internal.telephony.uicc.IccRecords;
	import com.android.internal.telephony.uicc.UiccController;
	import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;

	import java.util.ArrayList;

	public class ApnSettings extends RestrictedSettingsFragment implements
	Preference.OnPreferenceChangeListener {
	static final String TAG = "ApnSettings";

	public static final String EXTRA_POSITION = "position";
	public static final String RESTORE_CARRIERS_URI =
	"content://telephony/carriers/restore";
	public static final String PREFERRED_APN_URI =
	"content://telephony/carriers/preferapn";

	public static final String APN_ID = "apn_id";
	public static final String SUB_ID = "sub_id";
	public static final String MVNO_TYPE = "mvno_type";
	public static final String MVNO_MATCH_DATA = "mvno_match_data";

	private static final int ID_INDEX = 0;
	private static final int NAME_INDEX = 1;
	private static final int APN_INDEX = 2;
	private static final int TYPES_INDEX = 3;
	private static final int MVNO_TYPE_INDEX = 4;
	private static final int MVNO_MATCH_DATA_INDEX = 5;

	private static final int MENU_NEW = Menu.FIRST;
	private static final int MENU_RESTORE = Menu.FIRST + 1;

	private static final int EVENT_RESTORE_DEFAULTAPN_START = 1;
	private static final int EVENT_RESTORE_DEFAULTAPN_COMPLETE = 2;

	private static final int DIALOG_RESTORE_DEFAULTAPN = 1001;

	private static final Uri DEFAULTAPN_URI = Uri.parse(RESTORE_CARRIERS_URI);
	private static final Uri PREFERAPN_URI = Uri.parse(PREFERRED_APN_URI);

	private static boolean mRestoreDefaultApnMode;

	private UserManager mUserManager;
	private RestoreApnUiHandler mRestoreApnUiHandler;
	private RestoreApnProcessHandler mRestoreApnProcessHandler;
	private HandlerThread mRestoreDefaultApnThread;
	private SubscriptionInfo mSubscriptionInfo;
	private UiccController mUiccController;
	private String mMvnoType;
	private String mMvnoMatchData;

	private String mSelectedKey;

	private IntentFilter mMobileStateFilter;

	private boolean mUnavailable;

	private boolean mHideImsApn;
	private boolean mAllowAddingApns;

	public ApnSettings() {
	super(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS);
	}

	private final BroadcastReceiver mMobileStateReceiver = new BroadcastReceiver() {
	@Override
	public void onReceive(Context context, Intent intent) {
	if (intent.getAction().equals(
	TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED)) {
	PhoneConstants.DataState state = getMobileDataState(intent);
	switch (state) {
	case CONNECTED:
	if (!mRestoreDefaultApnMode) {
	fillList();
	} else {
	showDialog(DIALOG_RESTORE_DEFAULTAPN);
	}
	break;
	}
	}
	}
	};

	private static PhoneConstants.DataState getMobileDataState(Intent intent) {
	String str = intent.getStringExtra(PhoneConstants.STATE_KEY);
	if (str != null) {
	return Enum.valueOf(PhoneConstants.DataState.class, str);
	} else {
	return PhoneConstants.DataState.DISCONNECTED;
	}
	}

	@Override
	public int getMetricsCategory() {
	return MetricsEvent.APN;
	}

	@Override
	public void onCreate(Bundle icicle) {
	super.onCreate(icicle);
	final Activity activity = getActivity();
	final int subId = activity.getIntent().getIntExtra(SUB_ID,
	SubscriptionManager.INVALID_SUBSCRIPTION_ID);

	mMobileStateFilter = new IntentFilter(
	TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED);

	setIfOnlyAvailableForAdmins(true);

	mSubscriptionInfo = SubscriptionManager.from(activity).getActiveSubscriptionInfo(subId);
	mUiccController = UiccController.getInstance();

	CarrierConfigManager configManager = (CarrierConfigManager)
	getSystemService(Context.CARRIER_CONFIG_SERVICE);
	PersistableBundle b = configManager.getConfig();
	mHideImsApn = b.getBoolean(CarrierConfigManager.KEY_HIDE_IMS_APN_BOOL);
	mAllowAddingApns = b.getBoolean(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL);
	if (mAllowAddingApns) {
	String[] readOnlyApnTypes = b.getStringArray(
	CarrierConfigManager.KEY_READ_ONLY_APN_TYPES_STRING_ARRAY);
	// if no apn type can be edited, do not allow adding APNs
	if (ApnEditor.hasAllApns(readOnlyApnTypes)) {
	Log.d(TAG, "not allowing adding APN because all APN types are read only");
	mAllowAddingApns = false;
	}
	}
	mUserManager = UserManager.get(activity);
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
	super.onActivityCreated(savedInstanceState);

	getEmptyTextView().setText(R.string.apn_settings_not_available);
	mUnavailable = isUiRestricted();
	setHasOptionsMenu(!mUnavailable);
	if (mUnavailable) {
	addPreferencesFromResource(R.xml.placeholder_prefs);
	return;
	}

	addPreferencesFromResource(R.xml.apn_settings);
	}

	@Override
	public void onResume() {
	super.onResume();

	if (mUnavailable) {
	return;
	}

	getActivity().registerReceiver(mMobileStateReceiver, mMobileStateFilter);

	if (!mRestoreDefaultApnMode) {
	fillList();
	}
	}

	@Override
	public void onPause() {
	super.onPause();

	if (mUnavailable) {
	return;
	}

	getActivity().unregisterReceiver(mMobileStateReceiver);
	}

	@Override
	public void onDestroy() {
	super.onDestroy();

	if (mRestoreDefaultApnThread != null) {
	mRestoreDefaultApnThread.quit();
	}
	}

	@Override
	public EnforcedAdmin getRestrictionEnforcedAdmin() {
	final UserHandle user = UserHandle.of(mUserManager.getUserHandle());
	if (mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS, user)
	&& !mUserManager.hasBaseUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS,
	user)) {
	return EnforcedAdmin.MULTIPLE_ENFORCED_ADMIN;
	}
	return null;
	}

	private void fillList() {
	final TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
	final int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId()
	: SubscriptionManager.INVALID_SUBSCRIPTION_ID;
	final String mccmnc = mSubscriptionInfo == null ? "" : tm.getSimOperator(subId);
	Log.d(TAG, "mccmnc = " + mccmnc);
	StringBuilder where = new StringBuilder("numeric=\"" + mccmnc +
	"\" AND NOT (type='ia' AND (apn=\"\" OR apn IS NULL)) AND user_visible!=0");

	if (mHideImsApn) {
	where.append(" AND NOT (type='ims')");
	}

	Cursor cursor = getContentResolver().query(Telephony.Carriers.CONTENT_URI, new String[] {
	"_id", "name", "apn", "type", "mvno_type", "mvno_match_data"}, where.toString(),
	null, Telephony.Carriers.DEFAULT_SORT_ORDER);

	if (cursor != null) {
	IccRecords r = null;
	if (mUiccController != null && mSubscriptionInfo != null) {
	r = mUiccController.getIccRecords(
	SubscriptionManager.getPhoneId(subId), UiccController.APP_FAM_3GPP);
	}
	PreferenceGroup apnList = (PreferenceGroup) findPreference("apn_list");
	apnList.removeAll();

	ArrayList<ApnPreference> mnoApnList = new ArrayList<ApnPreference>();
	ArrayList<ApnPreference> mvnoApnList = new ArrayList<ApnPreference>();
	ArrayList<ApnPreference> mnoMmsApnList = new ArrayList<ApnPreference>();
	ArrayList<ApnPreference> mvnoMmsApnList = new ArrayList<ApnPreference>();

	mSelectedKey = getSelectedApnKey();
	cursor.moveToFirst();
	while (!cursor.isAfterLast()) {
	String name = cursor.getString(NAME_INDEX);
	String apn = cursor.getString(APN_INDEX);
	String key = cursor.getString(ID_INDEX);
	String type = cursor.getString(TYPES_INDEX);
	String mvnoType = cursor.getString(MVNO_TYPE_INDEX);
	String mvnoMatchData = cursor.getString(MVNO_MATCH_DATA_INDEX);

	ApnPreference pref = new ApnPreference(getPrefContext());

	pref.setKey(key);
	pref.setTitle(name);
	pref.setSummary(apn);
	pref.setPersistent(false);
	pref.setOnPreferenceChangeListener(this);
	pref.setSubId(subId);

	boolean selectable = ((type == null) \|\| !type.equals("mms"));
	pref.setSelectable(selectable);
	if (selectable) {
	if ((mSelectedKey != null) && mSelectedKey.equals(key)) {
	pref.setChecked();
	}
	addApnToList(pref, mnoApnList, mvnoApnList, r, mvnoType, mvnoMatchData);
	} else {
	addApnToList(pref, mnoMmsApnList, mvnoMmsApnList, r, mvnoType, mvnoMatchData);
	}
	cursor.moveToNext();
	}
	cursor.close();

	if (!mvnoApnList.isEmpty()) {
	mnoApnList = mvnoApnList;
	mnoMmsApnList = mvnoMmsApnList;

	// Also save the mvno info
	}

	for (Preference preference : mnoApnList) {
	apnList.addPreference(preference);
	}
	for (Preference preference : mnoMmsApnList) {
	apnList.addPreference(preference);
	}
	}
	}

	private void addApnToList(ApnPreference pref, ArrayList<ApnPreference> mnoList,
	ArrayList<ApnPreference> mvnoList, IccRecords r, String mvnoType,
	String mvnoMatchData) {
	if (r != null && !TextUtils.isEmpty(mvnoType) && !TextUtils.isEmpty(mvnoMatchData)) {
	if (ApnSetting.mvnoMatches(r, mvnoType, mvnoMatchData)) {
	mvnoList.add(pref);
	// Since adding to mvno list, save mvno info
	mMvnoType = mvnoType;
	mMvnoMatchData = mvnoMatchData;
	}
	} else {
	mnoList.add(pref);
	}
	}

	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
	if (!mUnavailable) {
	if (mAllowAddingApns) {
	menu.add(0, MENU_NEW, 0,
	getResources().getString(R.string.menu_new))
	.setIcon(R.drawable.ic_menu_add_white)
	.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
	}
	menu.add(0, MENU_RESTORE, 0,
	getResources().getString(R.string.menu_restore))
	.setIcon(android.R.drawable.ic_menu_upload);
	}

	super.onCreateOptionsMenu(menu, inflater);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
	switch (item.getItemId()) {
	case MENU_NEW:
	addNewApn();
	return true;

	case MENU_RESTORE:
	restoreDefaultApn();
	return true;
	}
	return super.onOptionsItemSelected(item);
	}

	private void addNewApn() {
	Intent intent = new Intent(Intent.ACTION_INSERT, Telephony.Carriers.CONTENT_URI);
	int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId()
	: SubscriptionManager.INVALID_SUBSCRIPTION_ID;
	intent.putExtra(SUB_ID, subId);
	if (!TextUtils.isEmpty(mMvnoType) && !TextUtils.isEmpty(mMvnoMatchData)) {
	intent.putExtra(MVNO_TYPE, mMvnoType);
	intent.putExtra(MVNO_MATCH_DATA, mMvnoMatchData);
	}
	startActivity(intent);
	}

	@Override
	public boolean onPreferenceTreeClick(Preference preference) {
	int pos = Integer.parseInt(preference.getKey());
	Uri url = ContentUris.withAppendedId(Telephony.Carriers.CONTENT_URI, pos);
	startActivity(new Intent(Intent.ACTION_EDIT, url));
	return true;
	}

	public boolean onPreferenceChange(Preference preference, Object newValue) {
	Log.d(TAG, "onPreferenceChange(): Preference - " + preference
	+ ", newValue - " + newValue + ", newValue type - "
	+ newValue.getClass());
	if (newValue instanceof String) {
	setSelectedApnKey((String) newValue);
	}

	return true;
	}

	private void setSelectedApnKey(String key) {
	mSelectedKey = key;
	ContentResolver resolver = getContentResolver();

	ContentValues values = new ContentValues();
	values.put(APN_ID, mSelectedKey);
	resolver.update(getUriForCurrSubId(PREFERAPN_URI), values, null, null);
	}

	private String getSelectedApnKey() {
	String key = null;

	Cursor cursor = getContentResolver().query(getUriForCurrSubId(PREFERAPN_URI),
	new String[] {"_id"}, null, null, Telephony.Carriers.DEFAULT_SORT_ORDER);
	if (cursor.getCount() > 0) {
	cursor.moveToFirst();
	key = cursor.getString(ID_INDEX);
	}
	cursor.close();
	return key;
	}

	private boolean restoreDefaultApn() {
	showDialog(DIALOG_RESTORE_DEFAULTAPN);
	mRestoreDefaultApnMode = true;

	if (mRestoreApnUiHandler == null) {
	mRestoreApnUiHandler = new RestoreApnUiHandler();
	}

	if (mRestoreApnProcessHandler == null \|\|
	mRestoreDefaultApnThread == null) {
	mRestoreDefaultApnThread = new HandlerThread(
	"Restore default APN Handler: Process Thread");
	mRestoreDefaultApnThread.start();
	mRestoreApnProcessHandler = new RestoreApnProcessHandler(
	mRestoreDefaultApnThread.getLooper(), mRestoreApnUiHandler);
	}

	mRestoreApnProcessHandler
	.sendEmptyMessage(EVENT_RESTORE_DEFAULTAPN_START);
	return true;
	}

	// Append subId to the Uri
	private Uri getUriForCurrSubId(Uri uri) {
	int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId()
	: SubscriptionManager.INVALID_SUBSCRIPTION_ID;
	if (SubscriptionManager.isValidSubscriptionId(subId)) {
	return Uri.withAppendedPath(uri, "subId/" + String.valueOf(subId));
	} else {
	return uri;
	}
	}

	private class RestoreApnUiHandler extends Handler {
	@Override
	public void handleMessage(Message msg) {
	switch (msg.what) {
	case EVENT_RESTORE_DEFAULTAPN_COMPLETE:
	Activity activity = getActivity();
	if (activity == null) {
	mRestoreDefaultApnMode = false;
	return;
	}
	fillList();
	getPreferenceScreen().setEnabled(true);
	mRestoreDefaultApnMode = false;
	removeDialog(DIALOG_RESTORE_DEFAULTAPN);
	Toast.makeText(
	activity,
	getResources().getString(
	R.string.restore_default_apn_completed),
	Toast.LENGTH_LONG).show();
	break;
	}
	}
	}

	private class RestoreApnProcessHandler extends Handler {
	private Handler mRestoreApnUiHandler;

	public RestoreApnProcessHandler(Looper looper, Handler restoreApnUiHandler) {
	super(looper);
	this.mRestoreApnUiHandler = restoreApnUiHandler;
	}

	@Override
	public void handleMessage(Message msg) {
	switch (msg.what) {
	case EVENT_RESTORE_DEFAULTAPN_START:
	ContentResolver resolver = getContentResolver();
	resolver.delete(getUriForCurrSubId(DEFAULTAPN_URI), null, null);
	mRestoreApnUiHandler
	.sendEmptyMessage(EVENT_RESTORE_DEFAULTAPN_COMPLETE);
	break;
	}
	}
	}

	@Override
	public Dialog onCreateDialog(int id) {
	if (id == DIALOG_RESTORE_DEFAULTAPN) {
	ProgressDialog dialog = new ProgressDialog(getActivity()) {
	public boolean onTouchEvent(MotionEvent event) {
	return true;
	}
	};
	dialog.setMessage(getResources().getString(R.string.restore_default_apn));
	dialog.setCancelable(false);
	return dialog;
	}
	return null;
	}

	@Override
	public int getDialogMetricsCategory(int dialogId) {
	if (dialogId == DIALOG_RESTORE_DEFAULTAPN) {
	return MetricsEvent.DIALOG_APN_RESTORE_DEFAULT;
	}
	return 0;
	}
	}