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.UserManager;
 import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceGroup;
 import android.preference.PreferenceScreen;
 import android.provider.Telephony;
 import android.telephony.SubscriptionInfo;
 import android.telephony.SubscriptionManager;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.TextView;
 import android.widget.Toast;

 import com.android.internal.telephony.Phone;
 import com.android.internal.telephony.PhoneConstants;
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.internal.telephony.TelephonyProperties;
 import android.telephony.TelephonyManager;

 import java.util.ArrayList;

 public class ApnSettings extends SettingsPreferenceFragment 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";

     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 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 RestoreApnUiHandler mRestoreApnUiHandler;
     private RestoreApnProcessHandler mRestoreApnProcessHandler;
     private HandlerThread mRestoreDefaultApnThread;
     private SubscriptionInfo mSubscriptionInfo;

     private UserManager mUm;

     private String mSelectedKey;

     private IntentFilter mMobileStateFilter;

     private boolean mUnavailable;

     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 void onCreate(Bundle icicle) {
         super.onCreate(icicle);
         final Activity activity = getActivity();
         final int subId = activity.getIntent().getIntExtra("sub_id",
                 SubscriptionManager.INVALID_SUBSCRIPTION_ID);

         mUm = (UserManager) getSystemService(Context.USER_SERVICE);

         mMobileStateFilter = new IntentFilter(
                 TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED);

         if (!mUm.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
             setHasOptionsMenu(true);
         }

         mSubscriptionInfo = Utils.findRecordBySubId(activity, subId);
     }

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

         TextView empty = (TextView) getView().findViewById(android.R.id.empty);
         if (empty != null) {
             empty.setText(R.string.apn_settings_not_available);
             getListView().setEmptyView(empty);
         }

         if (mUm.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
             mUnavailable = true;
             setPreferenceScreen(new PreferenceScreen(getActivity(), null));
             return;
         }

         addPreferencesFromResource(R.xml.apn_settings);

         getListView().setItemsCanFocus(true);
     }

     @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();
         }
     }

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

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

         if (cursor != null) {
             PreferenceGroup apnList = (PreferenceGroup) findPreference("apn_list");
             apnList.removeAll();

             ArrayList<Preference> mmsApnList = new ArrayList<Preference>();

             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);

                 ApnPreference pref = new ApnPreference(getActivity());

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

                 boolean selectable = ((type == null) || !type.equals("mms"));
                 pref.setSelectable(selectable);
                 if (selectable) {
                     if ((mSelectedKey != null) && mSelectedKey.equals(key)) {
                         pref.setChecked();
                     }
                     apnList.addPreference(pref);
                 } else {
                     mmsApnList.add(pref);
                 }
                 cursor.moveToNext();
             }
             cursor.close();

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

     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         if (!mUnavailable) {
             menu.add(0, MENU_NEW, 0,
                     getResources().getString(R.string.menu_new))
                     .setIcon(android.R.drawable.ic_menu_add)
                     .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);
         startActivity(intent);
     }

     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, 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(PREFERAPN_URI, values, null, null);
     }

     private String getSelectedApnKey() {
         String key = null;

         Cursor cursor = getContentResolver().query(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;
     }

     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(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());
             dialog.setMessage(getResources().getString(R.string.restore_default_apn));
             dialog.setCancelable(false);
             return dialog;
         }
         return null;
     }
 }
	/*
	* 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.UserManager;
	import android.preference.Preference;
	import android.preference.PreferenceActivity;
	import android.preference.PreferenceGroup;
	import android.preference.PreferenceScreen;
	import android.provider.Telephony;
	import android.telephony.SubscriptionInfo;
	import android.telephony.SubscriptionManager;
	import android.util.Log;
	import android.view.LayoutInflater;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.widget.TextView;
	import android.widget.Toast;

	import com.android.internal.telephony.Phone;
	import com.android.internal.telephony.PhoneConstants;
	import com.android.internal.telephony.TelephonyIntents;
	import com.android.internal.telephony.TelephonyProperties;
	import android.telephony.TelephonyManager;

	import java.util.ArrayList;

	public class ApnSettings extends SettingsPreferenceFragment 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";

	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 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 RestoreApnUiHandler mRestoreApnUiHandler;
	private RestoreApnProcessHandler mRestoreApnProcessHandler;
	private HandlerThread mRestoreDefaultApnThread;
	private SubscriptionInfo mSubscriptionInfo;

	private UserManager mUm;

	private String mSelectedKey;

	private IntentFilter mMobileStateFilter;

	private boolean mUnavailable;

	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 void onCreate(Bundle icicle) {
	super.onCreate(icicle);
	final Activity activity = getActivity();
	final int subId = activity.getIntent().getIntExtra("sub_id",
	SubscriptionManager.INVALID_SUBSCRIPTION_ID);

	mUm = (UserManager) getSystemService(Context.USER_SERVICE);

	mMobileStateFilter = new IntentFilter(
	TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED);

	if (!mUm.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
	setHasOptionsMenu(true);
	}

	mSubscriptionInfo = Utils.findRecordBySubId(activity, subId);
	}

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

	TextView empty = (TextView) getView().findViewById(android.R.id.empty);
	if (empty != null) {
	empty.setText(R.string.apn_settings_not_available);
	getListView().setEmptyView(empty);
	}

	if (mUm.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
	mUnavailable = true;
	setPreferenceScreen(new PreferenceScreen(getActivity(), null));
	return;
	}

	addPreferencesFromResource(R.xml.apn_settings);

	getListView().setItemsCanFocus(true);
	}

	@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();
	}
	}

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

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

	if (cursor != null) {
	PreferenceGroup apnList = (PreferenceGroup) findPreference("apn_list");
	apnList.removeAll();

	ArrayList<Preference> mmsApnList = new ArrayList<Preference>();

	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);

	ApnPreference pref = new ApnPreference(getActivity());

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

	boolean selectable = ((type == null) \|\| !type.equals("mms"));
	pref.setSelectable(selectable);
	if (selectable) {
	if ((mSelectedKey != null) && mSelectedKey.equals(key)) {
	pref.setChecked();
	}
	apnList.addPreference(pref);
	} else {
	mmsApnList.add(pref);
	}
	cursor.moveToNext();
	}
	cursor.close();

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

	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
	if (!mUnavailable) {
	menu.add(0, MENU_NEW, 0,
	getResources().getString(R.string.menu_new))
	.setIcon(android.R.drawable.ic_menu_add)
	.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);
	startActivity(intent);
	}

	@Override
	public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, 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(PREFERAPN_URI, values, null, null);
	}

	private String getSelectedApnKey() {
	String key = null;

	Cursor cursor = getContentResolver().query(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;
	}

	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(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());
	dialog.setMessage(getResources().getString(R.string.restore_default_apn));
	dialog.setCancelable(false);
	return dialog;
	}
	return null;
	}
	}