src/com/android/settings/IccLockSettings.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.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.res.Resources;
 import android.os.AsyncResult;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.support.v14.preference.SwitchPreference;
 import android.support.v7.preference.Preference;
 import android.telephony.SubscriptionInfo;
 import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.TabHost;
 import android.widget.TabHost.OnTabChangeListener;
 import android.widget.TabHost.TabContentFactory;
 import android.widget.TabHost.TabSpec;
 import android.widget.TabWidget;
 import android.widget.Toast;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.internal.telephony.Phone;
 import com.android.internal.telephony.PhoneFactory;
 import com.android.internal.telephony.TelephonyIntents;

 /**
  * Implements the preference screen to enable/disable ICC lock and
  * also the dialogs to change the ICC PIN. In the former case, enabling/disabling
  * the ICC lock will prompt the user for the current PIN.
  * In the Change PIN case, it prompts the user for old pin, new pin and new pin
  * again before attempting to change it. Calls the SimCard interface to execute
  * these operations.
  *
  */
 public class IccLockSettings extends SettingsPreferenceFragment
         implements EditPinPreference.OnPinEnteredListener {
     private static final String TAG = "IccLockSettings";
     private static final boolean DBG = true;

     private static final int OFF_MODE = 0;
     // State when enabling/disabling ICC lock
     private static final int ICC_LOCK_MODE = 1;
     // State when entering the old pin
     private static final int ICC_OLD_MODE = 2;
     // State when entering the new pin - first time
     private static final int ICC_NEW_MODE = 3;
     // State when entering the new pin - second time
     private static final int ICC_REENTER_MODE = 4;

     // Keys in xml file
     private static final String PIN_DIALOG = "sim_pin";
     private static final String PIN_TOGGLE = "sim_toggle";
     // Keys in icicle
     private static final String DIALOG_STATE = "dialogState";
     private static final String DIALOG_PIN = "dialogPin";
     private static final String DIALOG_ERROR = "dialogError";
     private static final String ENABLE_TO_STATE = "enableState";
     private static final String CURRENT_TAB = "currentTab";

     // Save and restore inputted PIN code when configuration changed
     // (ex. portrait<-->landscape) during change PIN code
     private static final String OLD_PINCODE = "oldPinCode";
     private static final String NEW_PINCODE = "newPinCode";

     private static final int MIN_PIN_LENGTH = 4;
     private static final int MAX_PIN_LENGTH = 8;
     // Which dialog to show next when popped up
     private int mDialogState = OFF_MODE;

     private String mPin;
     private String mOldPin;
     private String mNewPin;
     private String mError;
     // Are we trying to enable or disable ICC lock?
     private boolean mToState;

     private TabHost mTabHost;
     private TabWidget mTabWidget;
     private ListView mListView;

     private Phone mPhone;

     private EditPinPreference mPinDialog;
     private SwitchPreference mPinToggle;

     private Resources mRes;

     // For async handler to identify request type
     private static final int MSG_ENABLE_ICC_PIN_COMPLETE = 100;
     private static final int MSG_CHANGE_ICC_PIN_COMPLETE = 101;
     private static final int MSG_SIM_STATE_CHANGED = 102;

     // For replies from IccCard interface
     private Handler mHandler = new Handler() {
         public void handleMessage(Message msg) {
             AsyncResult ar = (AsyncResult) msg.obj;
             switch (msg.what) {
                 case MSG_ENABLE_ICC_PIN_COMPLETE:
                     iccLockChanged(ar.exception == null, msg.arg1);
                     break;
                 case MSG_CHANGE_ICC_PIN_COMPLETE:
                     iccPinChanged(ar.exception == null, msg.arg1);
                     break;
                 case MSG_SIM_STATE_CHANGED:
                     updatePreferences();
                     break;
             }

             return;
         }
     };

     private final BroadcastReceiver mSimStateReceiver = new BroadcastReceiver() {
         public void onReceive(Context context, Intent intent) {
             final String action = intent.getAction();
             if (TelephonyIntents.ACTION_SIM_STATE_CHANGED.equals(action)) {
                 mHandler.sendMessage(mHandler.obtainMessage(MSG_SIM_STATE_CHANGED));
             }
         }
     };

     // For top-level settings screen to query
     static boolean isIccLockEnabled() {
         return PhoneFactory.getDefaultPhone().getIccCard().getIccLockEnabled();
     }

     static String getSummary(Context context) {
         Resources res = context.getResources();
         String summary = isIccLockEnabled()
                 ? res.getString(R.string.sim_lock_on)
                 : res.getString(R.string.sim_lock_off);
         return summary;
     }

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

         if (Utils.isMonkeyRunning()) {
             finish();
             return;
         }

         addPreferencesFromResource(R.xml.sim_lock_settings);

         mPinDialog = (EditPinPreference) findPreference(PIN_DIALOG);
         mPinToggle = (SwitchPreference) findPreference(PIN_TOGGLE);
         if (savedInstanceState != null && savedInstanceState.containsKey(DIALOG_STATE)) {
             mDialogState = savedInstanceState.getInt(DIALOG_STATE);
             mPin = savedInstanceState.getString(DIALOG_PIN);
             mError = savedInstanceState.getString(DIALOG_ERROR);
             mToState = savedInstanceState.getBoolean(ENABLE_TO_STATE);

             // Restore inputted PIN code
             switch (mDialogState) {
                 case ICC_NEW_MODE:
                     mOldPin = savedInstanceState.getString(OLD_PINCODE);
                     break;

                 case ICC_REENTER_MODE:
                     mOldPin = savedInstanceState.getString(OLD_PINCODE);
                     mNewPin = savedInstanceState.getString(NEW_PINCODE);
                     break;

                 case ICC_LOCK_MODE:
                 case ICC_OLD_MODE:
                 default:
                     break;
             }
         }

         mPinDialog.setOnPinEnteredListener(this);

         // Don't need any changes to be remembered
         getPreferenceScreen().setPersistent(false);

         mRes = getResources();
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {

         final TelephonyManager tm =
                 (TelephonyManager) getContext().getSystemService(Context.TELEPHONY_SERVICE);
         final int numSims = tm.getSimCount();
         if (numSims > 1) {
             View view = inflater.inflate(R.layout.icc_lock_tabs, container, false);
             final ViewGroup prefs_container = (ViewGroup) view.findViewById(R.id.prefs_container);
             Utils.prepareCustomPreferencesList(container, view, prefs_container, false);
             View prefs = super.onCreateView(inflater, prefs_container, savedInstanceState);
             prefs_container.addView(prefs);

             mTabHost = (TabHost) view.findViewById(android.R.id.tabhost);
             mTabWidget = (TabWidget) view.findViewById(android.R.id.tabs);
             mListView = (ListView) view.findViewById(android.R.id.list);

             mTabHost.setup();
             mTabHost.setOnTabChangedListener(mTabListener);
             mTabHost.clearAllTabs();

             SubscriptionManager sm = SubscriptionManager.from(getContext());
             for (int i = 0; i < numSims; ++i) {
                 final SubscriptionInfo subInfo = sm.getActiveSubscriptionInfoForSimSlotIndex(i);
                 mTabHost.addTab(buildTabSpec(String.valueOf(i),
                         String.valueOf(subInfo == null
                             ? getContext().getString(R.string.sim_editor_title, i + 1)
                             : subInfo.getDisplayName())));
             }
             final SubscriptionInfo sir = sm.getActiveSubscriptionInfoForSimSlotIndex(0);

             mPhone = (sir == null) ? null
                 : PhoneFactory.getPhone(SubscriptionManager.getPhoneId(sir.getSubscriptionId()));

             if (savedInstanceState != null && savedInstanceState.containsKey(CURRENT_TAB)) {
                 mTabHost.setCurrentTabByTag(savedInstanceState.getString(CURRENT_TAB));
             }
             return view;
         } else {
             mPhone = PhoneFactory.getDefaultPhone();
             return super.onCreateView(inflater, container, savedInstanceState);
         }
     }

     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         updatePreferences();
     }

     private void updatePreferences() {
         if (mPinDialog != null) {
             mPinDialog.setEnabled(mPhone != null);
         }
         if (mPinToggle != null) {
             mPinToggle.setEnabled(mPhone != null);

             if (mPhone != null) {
                 mPinToggle.setChecked(mPhone.getIccCard().getIccLockEnabled());
             }
         }
     }

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

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

         // ACTION_SIM_STATE_CHANGED is sticky, so we'll receive current state after this call,
         // which will call updatePreferences().
         final IntentFilter filter = new IntentFilter(TelephonyIntents.ACTION_SIM_STATE_CHANGED);
         getContext().registerReceiver(mSimStateReceiver, filter);

         if (mDialogState != OFF_MODE) {
             showPinDialog();
         } else {
             // Prep for standard click on "Change PIN"
             resetDialogState();
         }
     }

     @Override
     public void onPause() {
         super.onPause();
         getContext().unregisterReceiver(mSimStateReceiver);
     }

     @Override
     public int getHelpResource() {
         return R.string.help_url_icc_lock;
     }

     @Override
     public void onSaveInstanceState(Bundle out) {
         // Need to store this state for slider open/close
         // There is one case where the dialog is popped up by the preference
         // framework. In that case, let the preference framework store the
         // dialog state. In other cases, where this activity manually launches
         // the dialog, store the state of the dialog.
         if (mPinDialog.isDialogOpen()) {
             out.putInt(DIALOG_STATE, mDialogState);
             out.putString(DIALOG_PIN, mPinDialog.getEditText().getText().toString());
             out.putString(DIALOG_ERROR, mError);
             out.putBoolean(ENABLE_TO_STATE, mToState);

             // Save inputted PIN code
             switch (mDialogState) {
                 case ICC_NEW_MODE:
                     out.putString(OLD_PINCODE, mOldPin);
                     break;

                 case ICC_REENTER_MODE:
                     out.putString(OLD_PINCODE, mOldPin);
                     out.putString(NEW_PINCODE, mNewPin);
                     break;

                 case ICC_LOCK_MODE:
                 case ICC_OLD_MODE:
                 default:
                     break;
             }
         } else {
             super.onSaveInstanceState(out);
         }

         if (mTabHost != null) {
             out.putString(CURRENT_TAB, mTabHost.getCurrentTabTag());
         }
     }

     private void showPinDialog() {
         if (mDialogState == OFF_MODE) {
             return;
         }
         setDialogValues();

         mPinDialog.showPinDialog();

         final EditText editText = mPinDialog.getEditText();
         if (!TextUtils.isEmpty(mPin) && editText != null) {
             editText.setSelection(mPin.length());
         }
     }

     private void setDialogValues() {
         mPinDialog.setText(mPin);
         String message = "";
         switch (mDialogState) {
             case ICC_LOCK_MODE:
                 message = mRes.getString(R.string.sim_enter_pin);
                 mPinDialog.setDialogTitle(mToState
                         ? mRes.getString(R.string.sim_enable_sim_lock)
                         : mRes.getString(R.string.sim_disable_sim_lock));
                 break;
             case ICC_OLD_MODE:
                 message = mRes.getString(R.string.sim_enter_old);
                 mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
                 break;
             case ICC_NEW_MODE:
                 message = mRes.getString(R.string.sim_enter_new);
                 mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
                 break;
             case ICC_REENTER_MODE:
                 message = mRes.getString(R.string.sim_reenter_new);
                 mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
                 break;
         }
         if (mError != null) {
             message = mError + "\n" + message;
             mError = null;
         }
         mPinDialog.setDialogMessage(message);
     }

     @Override
     public void onPinEntered(EditPinPreference preference, boolean positiveResult) {
         if (!positiveResult) {
             resetDialogState();
             return;
         }

         mPin = preference.getText();
         if (!reasonablePin(mPin)) {
             // inject error message and display dialog again
             mError = mRes.getString(R.string.sim_bad_pin);
             showPinDialog();
             return;
         }
         switch (mDialogState) {
             case ICC_LOCK_MODE:
                 tryChangeIccLockState();
                 break;
             case ICC_OLD_MODE:
                 mOldPin = mPin;
                 mDialogState = ICC_NEW_MODE;
                 mError = null;
                 mPin = null;
                 showPinDialog();
                 break;
             case ICC_NEW_MODE:
                 mNewPin = mPin;
                 mDialogState = ICC_REENTER_MODE;
                 mPin = null;
                 showPinDialog();
                 break;
             case ICC_REENTER_MODE:
                 if (!mPin.equals(mNewPin)) {
                     mError = mRes.getString(R.string.sim_pins_dont_match);
                     mDialogState = ICC_NEW_MODE;
                     mPin = null;
                     showPinDialog();
                 } else {
                     mError = null;
                     tryChangePin();
                 }
                 break;
         }
     }

     @Override
     public boolean onPreferenceTreeClick(Preference preference) {
         if (preference == mPinToggle) {
             // Get the new, preferred state
             mToState = mPinToggle.isChecked();
             // Flip it back and pop up pin dialog
             mPinToggle.setChecked(!mToState);
             mDialogState = ICC_LOCK_MODE;
             showPinDialog();
         } else if (preference == mPinDialog) {
             mDialogState = ICC_OLD_MODE;
             return false;
         }
         return true;
     }

     private void tryChangeIccLockState() {
         // Try to change icc lock. If it succeeds, toggle the lock state and
         // reset dialog state. Else inject error message and show dialog again.
         Message callback = Message.obtain(mHandler, MSG_ENABLE_ICC_PIN_COMPLETE);
         mPhone.getIccCard().setIccLockEnabled(mToState, mPin, callback);
         // Disable the setting till the response is received.
         mPinToggle.setEnabled(false);
     }

     private void iccLockChanged(boolean success, int attemptsRemaining) {
         if (success) {
             mPinToggle.setChecked(mToState);
         } else {
             Toast.makeText(getContext(), getPinPasswordErrorMessage(attemptsRemaining),
                     Toast.LENGTH_LONG).show();
         }
         mPinToggle.setEnabled(true);
         resetDialogState();
     }

     private void iccPinChanged(boolean success, int attemptsRemaining) {
         if (!success) {
             Toast.makeText(getContext(), getPinPasswordErrorMessage(attemptsRemaining),
                     Toast.LENGTH_LONG)
                     .show();
         } else {
             Toast.makeText(getContext(), mRes.getString(R.string.sim_change_succeeded),
                     Toast.LENGTH_SHORT)
                     .show();

         }
         resetDialogState();
     }

     private void tryChangePin() {
         Message callback = Message.obtain(mHandler, MSG_CHANGE_ICC_PIN_COMPLETE);
         mPhone.getIccCard().changeIccLockPassword(mOldPin,
                 mNewPin, callback);
     }

     private String getPinPasswordErrorMessage(int attemptsRemaining) {
         String displayMessage;

         if (attemptsRemaining == 0) {
             displayMessage = mRes.getString(R.string.wrong_pin_code_pukked);
         } else if (attemptsRemaining > 0) {
             displayMessage = mRes
                     .getQuantityString(R.plurals.wrong_pin_code, attemptsRemaining,
                             attemptsRemaining);
         } else {
             displayMessage = mRes.getString(R.string.pin_failed);
         }
         if (DBG) Log.d(TAG, "getPinPasswordErrorMessage:"
                 + " attemptsRemaining=" + attemptsRemaining + " displayMessage=" + displayMessage);
         return displayMessage;
     }

     private boolean reasonablePin(String pin) {
         if (pin == null || pin.length() < MIN_PIN_LENGTH || pin.length() > MAX_PIN_LENGTH) {
             return false;
         } else {
             return true;
         }
     }

     private void resetDialogState() {
         mError = null;
         mDialogState = ICC_OLD_MODE; // Default for when Change PIN is clicked
         mPin = "";
         setDialogValues();
         mDialogState = OFF_MODE;
     }

     private OnTabChangeListener mTabListener = new OnTabChangeListener() {
         @Override
         public void onTabChanged(String tabId) {
             final int slotId = Integer.parseInt(tabId);
             final SubscriptionInfo sir = SubscriptionManager.from(getActivity().getBaseContext())
                     .getActiveSubscriptionInfoForSimSlotIndex(slotId);

             mPhone = (sir == null) ? null
                 : PhoneFactory.getPhone(SubscriptionManager.getPhoneId(sir.getSubscriptionId()));

             // The User has changed tab; update the body.
             updatePreferences();
         }
     };

     private TabContentFactory mEmptyTabContent = new TabContentFactory() {
         @Override
         public View createTabContent(String tag) {
             return new View(mTabHost.getContext());
         }
     };

     private TabSpec buildTabSpec(String tag, String title) {
         return mTabHost.newTabSpec(tag).setIndicator(title).setContent(
                 mEmptyTabContent);
     }
 }
	/*
	* 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.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.res.Resources;
	import android.os.AsyncResult;
	import android.os.Bundle;
	import android.os.Handler;
	import android.os.Message;
	import android.support.v14.preference.SwitchPreference;
	import android.support.v7.preference.Preference;
	import android.telephony.SubscriptionInfo;
	import android.telephony.SubscriptionManager;
	import android.telephony.TelephonyManager;
	import android.text.TextUtils;
	import android.util.Log;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.EditText;
	import android.widget.ListView;
	import android.widget.TabHost;
	import android.widget.TabHost.OnTabChangeListener;
	import android.widget.TabHost.TabContentFactory;
	import android.widget.TabHost.TabSpec;
	import android.widget.TabWidget;
	import android.widget.Toast;
	import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
	import com.android.internal.telephony.Phone;
	import com.android.internal.telephony.PhoneFactory;
	import com.android.internal.telephony.TelephonyIntents;

	/**
	* Implements the preference screen to enable/disable ICC lock and
	* also the dialogs to change the ICC PIN. In the former case, enabling/disabling
	* the ICC lock will prompt the user for the current PIN.
	* In the Change PIN case, it prompts the user for old pin, new pin and new pin
	* again before attempting to change it. Calls the SimCard interface to execute
	* these operations.
	*
	*/
	public class IccLockSettings extends SettingsPreferenceFragment
	implements EditPinPreference.OnPinEnteredListener {
	private static final String TAG = "IccLockSettings";
	private static final boolean DBG = true;

	private static final int OFF_MODE = 0;
	// State when enabling/disabling ICC lock
	private static final int ICC_LOCK_MODE = 1;
	// State when entering the old pin
	private static final int ICC_OLD_MODE = 2;
	// State when entering the new pin - first time
	private static final int ICC_NEW_MODE = 3;
	// State when entering the new pin - second time
	private static final int ICC_REENTER_MODE = 4;

	// Keys in xml file
	private static final String PIN_DIALOG = "sim_pin";
	private static final String PIN_TOGGLE = "sim_toggle";
	// Keys in icicle
	private static final String DIALOG_STATE = "dialogState";
	private static final String DIALOG_PIN = "dialogPin";
	private static final String DIALOG_ERROR = "dialogError";
	private static final String ENABLE_TO_STATE = "enableState";
	private static final String CURRENT_TAB = "currentTab";

	// Save and restore inputted PIN code when configuration changed
	// (ex. portrait<-->landscape) during change PIN code
	private static final String OLD_PINCODE = "oldPinCode";
	private static final String NEW_PINCODE = "newPinCode";

	private static final int MIN_PIN_LENGTH = 4;
	private static final int MAX_PIN_LENGTH = 8;
	// Which dialog to show next when popped up
	private int mDialogState = OFF_MODE;

	private String mPin;
	private String mOldPin;
	private String mNewPin;
	private String mError;
	// Are we trying to enable or disable ICC lock?
	private boolean mToState;

	private TabHost mTabHost;
	private TabWidget mTabWidget;
	private ListView mListView;

	private Phone mPhone;

	private EditPinPreference mPinDialog;
	private SwitchPreference mPinToggle;

	private Resources mRes;

	// For async handler to identify request type
	private static final int MSG_ENABLE_ICC_PIN_COMPLETE = 100;
	private static final int MSG_CHANGE_ICC_PIN_COMPLETE = 101;
	private static final int MSG_SIM_STATE_CHANGED = 102;

	// For replies from IccCard interface
	private Handler mHandler = new Handler() {
	public void handleMessage(Message msg) {
	AsyncResult ar = (AsyncResult) msg.obj;
	switch (msg.what) {
	case MSG_ENABLE_ICC_PIN_COMPLETE:
	iccLockChanged(ar.exception == null, msg.arg1);
	break;
	case MSG_CHANGE_ICC_PIN_COMPLETE:
	iccPinChanged(ar.exception == null, msg.arg1);
	break;
	case MSG_SIM_STATE_CHANGED:
	updatePreferences();
	break;
	}

	return;
	}
	};

	private final BroadcastReceiver mSimStateReceiver = new BroadcastReceiver() {
	public void onReceive(Context context, Intent intent) {
	final String action = intent.getAction();
	if (TelephonyIntents.ACTION_SIM_STATE_CHANGED.equals(action)) {
	mHandler.sendMessage(mHandler.obtainMessage(MSG_SIM_STATE_CHANGED));
	}
	}
	};

	// For top-level settings screen to query
	static boolean isIccLockEnabled() {
	return PhoneFactory.getDefaultPhone().getIccCard().getIccLockEnabled();
	}

	static String getSummary(Context context) {
	Resources res = context.getResources();
	String summary = isIccLockEnabled()
	? res.getString(R.string.sim_lock_on)
	: res.getString(R.string.sim_lock_off);
	return summary;
	}

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

	if (Utils.isMonkeyRunning()) {
	finish();
	return;
	}

	addPreferencesFromResource(R.xml.sim_lock_settings);

	mPinDialog = (EditPinPreference) findPreference(PIN_DIALOG);
	mPinToggle = (SwitchPreference) findPreference(PIN_TOGGLE);
	if (savedInstanceState != null && savedInstanceState.containsKey(DIALOG_STATE)) {
	mDialogState = savedInstanceState.getInt(DIALOG_STATE);
	mPin = savedInstanceState.getString(DIALOG_PIN);
	mError = savedInstanceState.getString(DIALOG_ERROR);
	mToState = savedInstanceState.getBoolean(ENABLE_TO_STATE);

	// Restore inputted PIN code
	switch (mDialogState) {
	case ICC_NEW_MODE:
	mOldPin = savedInstanceState.getString(OLD_PINCODE);
	break;

	case ICC_REENTER_MODE:
	mOldPin = savedInstanceState.getString(OLD_PINCODE);
	mNewPin = savedInstanceState.getString(NEW_PINCODE);
	break;

	case ICC_LOCK_MODE:
	case ICC_OLD_MODE:
	default:
	break;
	}
	}

	mPinDialog.setOnPinEnteredListener(this);

	// Don't need any changes to be remembered
	getPreferenceScreen().setPersistent(false);

	mRes = getResources();
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {

	final TelephonyManager tm =
	(TelephonyManager) getContext().getSystemService(Context.TELEPHONY_SERVICE);
	final int numSims = tm.getSimCount();
	if (numSims > 1) {
	View view = inflater.inflate(R.layout.icc_lock_tabs, container, false);
	final ViewGroup prefs_container = (ViewGroup) view.findViewById(R.id.prefs_container);
	Utils.prepareCustomPreferencesList(container, view, prefs_container, false);
	View prefs = super.onCreateView(inflater, prefs_container, savedInstanceState);
	prefs_container.addView(prefs);

	mTabHost = (TabHost) view.findViewById(android.R.id.tabhost);
	mTabWidget = (TabWidget) view.findViewById(android.R.id.tabs);
	mListView = (ListView) view.findViewById(android.R.id.list);

	mTabHost.setup();
	mTabHost.setOnTabChangedListener(mTabListener);
	mTabHost.clearAllTabs();

	SubscriptionManager sm = SubscriptionManager.from(getContext());
	for (int i = 0; i < numSims; ++i) {
	final SubscriptionInfo subInfo = sm.getActiveSubscriptionInfoForSimSlotIndex(i);
	mTabHost.addTab(buildTabSpec(String.valueOf(i),
	String.valueOf(subInfo == null
	? getContext().getString(R.string.sim_editor_title, i + 1)
	: subInfo.getDisplayName())));
	}
	final SubscriptionInfo sir = sm.getActiveSubscriptionInfoForSimSlotIndex(0);

	mPhone = (sir == null) ? null
	: PhoneFactory.getPhone(SubscriptionManager.getPhoneId(sir.getSubscriptionId()));

	if (savedInstanceState != null && savedInstanceState.containsKey(CURRENT_TAB)) {
	mTabHost.setCurrentTabByTag(savedInstanceState.getString(CURRENT_TAB));
	}
	return view;
	} else {
	mPhone = PhoneFactory.getDefaultPhone();
	return super.onCreateView(inflater, container, savedInstanceState);
	}
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
	super.onViewCreated(view, savedInstanceState);
	updatePreferences();
	}

	private void updatePreferences() {
	if (mPinDialog != null) {
	mPinDialog.setEnabled(mPhone != null);
	}
	if (mPinToggle != null) {
	mPinToggle.setEnabled(mPhone != null);

	if (mPhone != null) {
	mPinToggle.setChecked(mPhone.getIccCard().getIccLockEnabled());
	}
	}
	}

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

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

	// ACTION_SIM_STATE_CHANGED is sticky, so we'll receive current state after this call,
	// which will call updatePreferences().
	final IntentFilter filter = new IntentFilter(TelephonyIntents.ACTION_SIM_STATE_CHANGED);
	getContext().registerReceiver(mSimStateReceiver, filter);

	if (mDialogState != OFF_MODE) {
	showPinDialog();
	} else {
	// Prep for standard click on "Change PIN"
	resetDialogState();
	}
	}

	@Override
	public void onPause() {
	super.onPause();
	getContext().unregisterReceiver(mSimStateReceiver);
	}

	@Override
	public int getHelpResource() {
	return R.string.help_url_icc_lock;
	}

	@Override
	public void onSaveInstanceState(Bundle out) {
	// Need to store this state for slider open/close
	// There is one case where the dialog is popped up by the preference
	// framework. In that case, let the preference framework store the
	// dialog state. In other cases, where this activity manually launches
	// the dialog, store the state of the dialog.
	if (mPinDialog.isDialogOpen()) {
	out.putInt(DIALOG_STATE, mDialogState);
	out.putString(DIALOG_PIN, mPinDialog.getEditText().getText().toString());
	out.putString(DIALOG_ERROR, mError);
	out.putBoolean(ENABLE_TO_STATE, mToState);

	// Save inputted PIN code
	switch (mDialogState) {
	case ICC_NEW_MODE:
	out.putString(OLD_PINCODE, mOldPin);
	break;

	case ICC_REENTER_MODE:
	out.putString(OLD_PINCODE, mOldPin);
	out.putString(NEW_PINCODE, mNewPin);
	break;

	case ICC_LOCK_MODE:
	case ICC_OLD_MODE:
	default:
	break;
	}
	} else {
	super.onSaveInstanceState(out);
	}

	if (mTabHost != null) {
	out.putString(CURRENT_TAB, mTabHost.getCurrentTabTag());
	}
	}

	private void showPinDialog() {
	if (mDialogState == OFF_MODE) {
	return;
	}
	setDialogValues();

	mPinDialog.showPinDialog();

	final EditText editText = mPinDialog.getEditText();
	if (!TextUtils.isEmpty(mPin) && editText != null) {
	editText.setSelection(mPin.length());
	}
	}

	private void setDialogValues() {
	mPinDialog.setText(mPin);
	String message = "";
	switch (mDialogState) {
	case ICC_LOCK_MODE:
	message = mRes.getString(R.string.sim_enter_pin);
	mPinDialog.setDialogTitle(mToState
	? mRes.getString(R.string.sim_enable_sim_lock)
	: mRes.getString(R.string.sim_disable_sim_lock));
	break;
	case ICC_OLD_MODE:
	message = mRes.getString(R.string.sim_enter_old);
	mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
	break;
	case ICC_NEW_MODE:
	message = mRes.getString(R.string.sim_enter_new);
	mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
	break;
	case ICC_REENTER_MODE:
	message = mRes.getString(R.string.sim_reenter_new);
	mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
	break;
	}
	if (mError != null) {
	message = mError + "\n" + message;
	mError = null;
	}
	mPinDialog.setDialogMessage(message);
	}

	@Override
	public void onPinEntered(EditPinPreference preference, boolean positiveResult) {
	if (!positiveResult) {
	resetDialogState();
	return;
	}

	mPin = preference.getText();
	if (!reasonablePin(mPin)) {
	// inject error message and display dialog again
	mError = mRes.getString(R.string.sim_bad_pin);
	showPinDialog();
	return;
	}
	switch (mDialogState) {
	case ICC_LOCK_MODE:
	tryChangeIccLockState();
	break;
	case ICC_OLD_MODE:
	mOldPin = mPin;
	mDialogState = ICC_NEW_MODE;
	mError = null;
	mPin = null;
	showPinDialog();
	break;
	case ICC_NEW_MODE:
	mNewPin = mPin;
	mDialogState = ICC_REENTER_MODE;
	mPin = null;
	showPinDialog();
	break;
	case ICC_REENTER_MODE:
	if (!mPin.equals(mNewPin)) {
	mError = mRes.getString(R.string.sim_pins_dont_match);
	mDialogState = ICC_NEW_MODE;
	mPin = null;
	showPinDialog();
	} else {
	mError = null;
	tryChangePin();
	}
	break;
	}
	}

	@Override
	public boolean onPreferenceTreeClick(Preference preference) {
	if (preference == mPinToggle) {
	// Get the new, preferred state
	mToState = mPinToggle.isChecked();
	// Flip it back and pop up pin dialog
	mPinToggle.setChecked(!mToState);
	mDialogState = ICC_LOCK_MODE;
	showPinDialog();
	} else if (preference == mPinDialog) {
	mDialogState = ICC_OLD_MODE;
	return false;
	}
	return true;
	}

	private void tryChangeIccLockState() {
	// Try to change icc lock. If it succeeds, toggle the lock state and
	// reset dialog state. Else inject error message and show dialog again.
	Message callback = Message.obtain(mHandler, MSG_ENABLE_ICC_PIN_COMPLETE);
	mPhone.getIccCard().setIccLockEnabled(mToState, mPin, callback);
	// Disable the setting till the response is received.
	mPinToggle.setEnabled(false);
	}

	private void iccLockChanged(boolean success, int attemptsRemaining) {
	if (success) {
	mPinToggle.setChecked(mToState);
	} else {
	Toast.makeText(getContext(), getPinPasswordErrorMessage(attemptsRemaining),
	Toast.LENGTH_LONG).show();
	}
	mPinToggle.setEnabled(true);
	resetDialogState();
	}

	private void iccPinChanged(boolean success, int attemptsRemaining) {
	if (!success) {
	Toast.makeText(getContext(), getPinPasswordErrorMessage(attemptsRemaining),
	Toast.LENGTH_LONG)
	.show();
	} else {
	Toast.makeText(getContext(), mRes.getString(R.string.sim_change_succeeded),
	Toast.LENGTH_SHORT)
	.show();

	}
	resetDialogState();
	}

	private void tryChangePin() {
	Message callback = Message.obtain(mHandler, MSG_CHANGE_ICC_PIN_COMPLETE);
	mPhone.getIccCard().changeIccLockPassword(mOldPin,
	mNewPin, callback);
	}

	private String getPinPasswordErrorMessage(int attemptsRemaining) {
	String displayMessage;

	if (attemptsRemaining == 0) {
	displayMessage = mRes.getString(R.string.wrong_pin_code_pukked);
	} else if (attemptsRemaining > 0) {
	displayMessage = mRes
	.getQuantityString(R.plurals.wrong_pin_code, attemptsRemaining,
	attemptsRemaining);
	} else {
	displayMessage = mRes.getString(R.string.pin_failed);
	}
	if (DBG) Log.d(TAG, "getPinPasswordErrorMessage:"
	+ " attemptsRemaining=" + attemptsRemaining + " displayMessage=" + displayMessage);
	return displayMessage;
	}

	private boolean reasonablePin(String pin) {
	if (pin == null \|\| pin.length() < MIN_PIN_LENGTH \|\| pin.length() > MAX_PIN_LENGTH) {
	return false;
	} else {
	return true;
	}
	}

	private void resetDialogState() {
	mError = null;
	mDialogState = ICC_OLD_MODE; // Default for when Change PIN is clicked
	mPin = "";
	setDialogValues();
	mDialogState = OFF_MODE;
	}

	private OnTabChangeListener mTabListener = new OnTabChangeListener() {
	@Override
	public void onTabChanged(String tabId) {
	final int slotId = Integer.parseInt(tabId);
	final SubscriptionInfo sir = SubscriptionManager.from(getActivity().getBaseContext())
	.getActiveSubscriptionInfoForSimSlotIndex(slotId);

	mPhone = (sir == null) ? null
	: PhoneFactory.getPhone(SubscriptionManager.getPhoneId(sir.getSubscriptionId()));

	// The User has changed tab; update the body.
	updatePreferences();
	}
	};

	private TabContentFactory mEmptyTabContent = new TabContentFactory() {
	@Override
	public View createTabContent(String tag) {
	return new View(mTabHost.getContext());
	}
	};

	private TabSpec buildTabSpec(String tag, String title) {
	return mTabHost.newTabSpec(tag).setIndicator(title).setContent(
	mEmptyTabContent);
	}
	}