1 /**
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License
15  */
16 
17 package com.android.phone.settings;
18 
19 import android.app.Dialog;
20 import android.content.DialogInterface;
21 import android.content.Intent;
22 import android.database.Cursor;
23 import android.os.AsyncResult;
24 import android.os.Bundle;
25 import android.os.Handler;
26 import android.os.Message;
27 import android.os.PersistableBundle;
28 import android.os.UserManager;
29 import android.preference.Preference;
30 import android.preference.PreferenceActivity;
31 import android.preference.PreferenceScreen;
32 import android.provider.ContactsContract.CommonDataKinds;
33 import android.provider.Settings;
34 import android.telecom.PhoneAccountHandle;
35 import android.telephony.CarrierConfigManager;
36 import android.telephony.TelephonyManager;
37 import android.text.BidiFormatter;
38 import android.text.TextDirectionHeuristics;
39 import android.text.TextUtils;
40 import android.util.Log;
41 import android.view.MenuItem;
42 import android.widget.ListAdapter;
43 import android.widget.Toast;
44 
45 import com.android.internal.telephony.CallForwardInfo;
46 import com.android.internal.telephony.CommandsInterface;
47 import com.android.internal.telephony.Phone;
48 import com.android.internal.telephony.PhoneConstants;
49 import com.android.internal.telephony.util.NotificationChannelController;
50 import com.android.phone.EditPhoneNumberPreference;
51 import com.android.phone.PhoneGlobals;
52 import com.android.phone.PhoneUtils;
53 import com.android.phone.R;
54 import com.android.phone.SubscriptionInfoHelper;
55 
56 import java.util.Collection;
57 import java.util.HashMap;
58 import java.util.HashSet;
59 import java.util.Iterator;
60 import java.util.Map;
61 
62 public class VoicemailSettingsActivity extends PreferenceActivity
63         implements DialogInterface.OnClickListener,
64                 Preference.OnPreferenceChangeListener,
65                 EditPhoneNumberPreference.OnDialogClosedListener,
66                 EditPhoneNumberPreference.GetDefaultNumberListener{
67     private static final String LOG_TAG = VoicemailSettingsActivity.class.getSimpleName();
68     private static final boolean DBG = (PhoneGlobals.DBG_LEVEL >= 2);
69 
70     /**
71      * Intent action to bring up Voicemail Provider settings
72      * DO NOT RENAME. There are existing apps which use this intent value.
73      */
74     public static final String ACTION_ADD_VOICEMAIL =
75             "com.android.phone.CallFeaturesSetting.ADD_VOICEMAIL";
76 
77     /**
78      * Intent action to bring up the {@code VoicemailSettingsActivity}.
79      * DO NOT RENAME. There are existing apps which use this intent value.
80      */
81     public static final String ACTION_CONFIGURE_VOICEMAIL =
82             "com.android.phone.CallFeaturesSetting.CONFIGURE_VOICEMAIL";
83 
84     // Extra put in the return from VM provider config containing voicemail number to set
85     public static final String VM_NUMBER_EXTRA = "com.android.phone.VoicemailNumber";
86     // Extra put in the return from VM provider config containing call forwarding number to set
87     public static final String FWD_NUMBER_EXTRA = "com.android.phone.ForwardingNumber";
88     // Extra put in the return from VM provider config containing call forwarding number to set
89     public static final String FWD_NUMBER_TIME_EXTRA = "com.android.phone.ForwardingNumberTime";
90     // If the VM provider returns non null value in this extra we will force the user to
91     // choose another VM provider
92     public static final String SIGNOUT_EXTRA = "com.android.phone.Signout";
93 
94     /**
95      * String Extra put into ACTION_ADD_VOICEMAIL call to indicate which provider should be hidden
96      * in the list of providers presented to the user. This allows a provider which is being
97      * disabled (e.g. GV user logging out) to force the user to pick some other provider.
98      */
99     public static final String IGNORE_PROVIDER_EXTRA = "com.android.phone.ProviderToIgnore";
100 
101     /**
102      * String Extra put into ACTION_ADD_VOICEMAIL to indicate that the voicemail setup screen should
103      * be opened.
104      */
105     public static final String SETUP_VOICEMAIL_EXTRA = "com.android.phone.SetupVoicemail";
106 
107     // TODO: Define these preference keys in XML.
108     private static final String BUTTON_VOICEMAIL_KEY = "button_voicemail_key";
109     private static final String BUTTON_VOICEMAIL_PROVIDER_KEY = "button_voicemail_provider_key";
110     private static final String BUTTON_VOICEMAIL_SETTING_KEY = "button_voicemail_setting_key";
111 
112     /** Event for Async voicemail change call */
113     private static final int EVENT_VOICEMAIL_CHANGED        = 500;
114     private static final int EVENT_FORWARDING_CHANGED       = 501;
115     private static final int EVENT_FORWARDING_GET_COMPLETED = 502;
116 
117     /** Handle to voicemail pref */
118     private static final int VOICEMAIL_PREF_ID = 1;
119     private static final int VOICEMAIL_PROVIDER_CFG_ID = 2;
120 
121     /**
122      * Results of reading forwarding settings
123      */
124     private CallForwardInfo[] mForwardingReadResults = null;
125 
126     /**
127      * Result of forwarding number change.
128      * Keys are reasons (eg. unconditional forwarding).
129      */
130     private Map<Integer, AsyncResult> mForwardingChangeResults = null;
131 
132     /**
133      * Expected CF read result types.
134      * This set keeps track of the CF types for which we've issued change
135      * commands so we can tell when we've received all of the responses.
136      */
137     private Collection<Integer> mExpectedChangeResultReasons = null;
138 
139     /**
140      * Result of vm number change
141      */
142     private AsyncResult mVoicemailChangeResult = null;
143 
144     /**
145      * Previous VM provider setting so we can return to it in case of failure.
146      */
147     private String mPreviousVMProviderKey = null;
148 
149     /**
150      * Id of the dialog being currently shown.
151      */
152     private int mCurrentDialogId = 0;
153 
154     /**
155      * Flag indicating that we are invoking settings for the voicemail provider programmatically
156      * due to vm provider change.
157      */
158     private boolean mVMProviderSettingsForced = false;
159 
160     /**
161      * Flag indicating that we are making changes to vm or fwd numbers
162      * due to vm provider change.
163      */
164     private boolean mChangingVMorFwdDueToProviderChange = false;
165 
166     /**
167      * True if we are in the process of vm & fwd number change and vm has already been changed.
168      * This is used to decide what to do in case of rollback.
169      */
170     private boolean mVMChangeCompletedSuccessfully = false;
171 
172     /**
173      * True if we had full or partial failure setting forwarding numbers and so need to roll them
174      * back.
175      */
176     private boolean mFwdChangesRequireRollback = false;
177 
178     /**
179      * Id of error msg to display to user once we are done reverting the VM provider to the previous
180      * one.
181      */
182     private int mVMOrFwdSetError = 0;
183 
184     /** string to hold old voicemail number as it is being updated. */
185     private String mOldVmNumber;
186 
187     // New call forwarding settings and vm number we will be setting
188     // Need to save these since before we get to saving we need to asynchronously
189     // query the existing forwarding settings.
190     private CallForwardInfo[] mNewFwdSettings;
191     private String mNewVMNumber;
192 
193     /**
194      * Used to indicate that the voicemail preference should be shown.
195      */
196     private boolean mShowVoicemailPreference = false;
197 
198     private boolean mForeground;
199     private Phone mPhone;
200     private SubscriptionInfoHelper mSubscriptionInfoHelper;
201 
202     private EditPhoneNumberPreference mSubMenuVoicemailSettings = null;
203     private VoicemailProviderListPreference mVoicemailProviders;
204     private PreferenceScreen mVoicemailSettings;
205     private Preference mVoicemailNotificationPreference;
206 
207     //*********************************************************************************************
208     // Preference Activity Methods
209     //*********************************************************************************************
210 
211     @Override
onCreate(Bundle icicle)212     protected void onCreate(Bundle icicle) {
213         super.onCreate(icicle);
214         // Make sure we are running as the primary user only
215         UserManager userManager = getApplicationContext().getSystemService(UserManager.class);
216         if (!userManager.isPrimaryUser()) {
217            Toast.makeText(this, R.string.voice_number_setting_primary_user_only,
218                    Toast.LENGTH_SHORT).show();
219            finish();
220            return;
221         }
222         // Show the voicemail preference in onResume if the calling intent specifies the
223         // ACTION_ADD_VOICEMAIL action.
224         mShowVoicemailPreference = (icicle == null) &&
225                 TextUtils.equals(getIntent().getAction(), ACTION_ADD_VOICEMAIL);
226 
227         PhoneAccountHandle phoneAccountHandle = (PhoneAccountHandle)
228                 getIntent().getParcelableExtra(TelephonyManager.EXTRA_PHONE_ACCOUNT_HANDLE);
229         if (phoneAccountHandle != null) {
230             getIntent().putExtra(SubscriptionInfoHelper.SUB_ID_EXTRA,
231                     PhoneUtils.getSubIdForPhoneAccountHandle(phoneAccountHandle));
232         }
233         mSubscriptionInfoHelper = new SubscriptionInfoHelper(this, getIntent());
234         mSubscriptionInfoHelper.setActionBarTitle(
235                 getActionBar(), getResources(), R.string.voicemail_settings_with_label);
236         mPhone = mSubscriptionInfoHelper.getPhone();
237         addPreferencesFromResource(R.xml.voicemail_settings);
238 
239         mVoicemailNotificationPreference =
240                 findPreference(getString(R.string.voicemail_notifications_key));
241         final Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);
242         intent.putExtra(Settings.EXTRA_CHANNEL_ID,
243                 NotificationChannelController.CHANNEL_ID_VOICE_MAIL);
244         intent.putExtra(Settings.EXTRA_APP_PACKAGE, mPhone.getContext().getPackageName());
245         mVoicemailNotificationPreference.setIntent(intent);
246     }
247 
248     @Override
onResume()249     protected void onResume() {
250         super.onResume();
251         mForeground = true;
252 
253         PreferenceScreen prefSet = getPreferenceScreen();
254 
255         if (mSubMenuVoicemailSettings == null) {
256             mSubMenuVoicemailSettings =
257                     (EditPhoneNumberPreference) findPreference(BUTTON_VOICEMAIL_KEY);
258         }
259         if (mSubMenuVoicemailSettings != null) {
260             mSubMenuVoicemailSettings.setParentActivity(this, VOICEMAIL_PREF_ID, this);
261             mSubMenuVoicemailSettings.setDialogOnClosedListener(this);
262             mSubMenuVoicemailSettings.setDialogTitle(R.string.voicemail_settings_number_label);
263             if (!getBooleanCarrierConfig(
264                     CarrierConfigManager.KEY_EDITABLE_VOICEMAIL_NUMBER_SETTING_BOOL)) {
265                 mSubMenuVoicemailSettings.setEnabled(false);
266             }
267         }
268 
269         mVoicemailProviders = (VoicemailProviderListPreference) findPreference(
270                 BUTTON_VOICEMAIL_PROVIDER_KEY);
271         mVoicemailProviders.init(mPhone, getIntent());
272         mVoicemailProviders.setOnPreferenceChangeListener(this);
273         mPreviousVMProviderKey = mVoicemailProviders.getValue();
274 
275         mVoicemailSettings = (PreferenceScreen) findPreference(BUTTON_VOICEMAIL_SETTING_KEY);
276 
277         maybeHidePublicSettings();
278 
279         updateVMPreferenceWidgets(mVoicemailProviders.getValue());
280 
281         // check the intent that started this activity and pop up the voicemail
282         // dialog if we've been asked to.
283         // If we have at least one non default VM provider registered then bring up
284         // the selection for the VM provider, otherwise bring up a VM number dialog.
285         // We only bring up the dialog the first time we are called (not after orientation change)
286         if (mShowVoicemailPreference) {
287             if (DBG) log("ACTION_ADD_VOICEMAIL Intent is thrown");
288             if (mVoicemailProviders.hasMoreThanOneVoicemailProvider()) {
289                 if (DBG) log("Voicemail data has more than one provider.");
290                 simulatePreferenceClick(mVoicemailProviders);
291             } else {
292                 onPreferenceChange(mVoicemailProviders, VoicemailProviderListPreference.DEFAULT_KEY);
293                 mVoicemailProviders.setValue(VoicemailProviderListPreference.DEFAULT_KEY);
294             }
295             mShowVoicemailPreference = false;
296         }
297 
298         updateVoiceNumberField();
299         mVMProviderSettingsForced = false;
300     }
301 
302     /**
303      * Hides a subset of voicemail settings if required by the intent extra. This is used by the
304      * default dialer to show "advanced" voicemail settings from its own custom voicemail settings
305      * UI.
306      */
maybeHidePublicSettings()307     private void maybeHidePublicSettings() {
308         if(!getIntent().getBooleanExtra(TelephonyManager.EXTRA_HIDE_PUBLIC_SETTINGS, false)){
309             return;
310         }
311         if (DBG) {
312             log("maybeHidePublicSettings: settings hidden by EXTRA_HIDE_PUBLIC_SETTINGS");
313         }
314         PreferenceScreen preferenceScreen = getPreferenceScreen();
315         preferenceScreen.removePreference(mVoicemailNotificationPreference);
316     }
317 
318     @Override
onPause()319     public void onPause() {
320         super.onPause();
321         mForeground = false;
322     }
323 
324     @Override
onOptionsItemSelected(MenuItem item)325     public boolean onOptionsItemSelected(MenuItem item) {
326         if (item.getItemId() == android.R.id.home) {
327             onBackPressed();
328             return true;
329         }
330         return super.onOptionsItemSelected(item);
331     }
332 
333     @Override
onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference)334     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
335         if (preference == mSubMenuVoicemailSettings) {
336             return true;
337         } else if (preference.getKey().equals(mVoicemailSettings.getKey())) {
338             // Check key instead of comparing reference because closing the voicemail notification
339             // ringtone dialog invokes onResume(), but leaves the old preference screen up,
340             // TODO: Revert to checking reference after migrating voicemail to its own activity.
341             if (DBG) log("onPreferenceTreeClick: Voicemail Settings Preference is clicked.");
342 
343             final Dialog dialog = ((PreferenceScreen) preference).getDialog();
344             if (dialog != null) {
345                 dialog.getActionBar().setDisplayHomeAsUpEnabled(false);
346             }
347 
348             mSubMenuVoicemailSettings =
349                     (EditPhoneNumberPreference) findPreference(BUTTON_VOICEMAIL_KEY);
350             mSubMenuVoicemailSettings.setParentActivity(this, VOICEMAIL_PREF_ID, this);
351             mSubMenuVoicemailSettings.setDialogOnClosedListener(this);
352             mSubMenuVoicemailSettings.setDialogTitle(R.string.voicemail_settings_number_label);
353             updateVoiceNumberField();
354 
355             if (preference.getIntent() != null) {
356                 if (DBG) log("Invoking cfg intent " + preference.getIntent().getPackage());
357 
358                 // onActivityResult() will be responsible for resetting some of variables.
359                 this.startActivityForResult(preference.getIntent(), VOICEMAIL_PROVIDER_CFG_ID);
360                 return true;
361             } else {
362                 if (DBG) log("onPreferenceTreeClick(). No intent; use default behavior in xml.");
363 
364                 // onActivityResult() will not be called, so reset variables here.
365                 mPreviousVMProviderKey = VoicemailProviderListPreference.DEFAULT_KEY;
366                 mVMProviderSettingsForced = false;
367                 return false;
368             }
369         }
370         return false;
371     }
372 
373     /**
374      * Implemented to support onPreferenceChangeListener to look for preference changes.
375      *
376      * @param preference is the preference to be changed
377      * @param objValue should be the value of the selection, NOT its localized
378      * display value.
379      */
380     @Override
onPreferenceChange(Preference preference, Object objValue)381     public boolean onPreferenceChange(Preference preference, Object objValue) {
382         if (DBG) log("onPreferenceChange: \"" + preference + "\" changed to \"" + objValue + "\"");
383 
384         if (preference == mVoicemailProviders) {
385             final String newProviderKey = (String) objValue;
386 
387             // If previous provider key and the new one is same, we don't need to handle it.
388             if (mPreviousVMProviderKey.equals(newProviderKey)) {
389                 if (DBG) log("No change is made to the VM provider setting.");
390                 return true;
391             }
392             updateVMPreferenceWidgets(newProviderKey);
393 
394             final VoicemailProviderSettings newProviderSettings =
395                     VoicemailProviderSettingsUtil.load(this, newProviderKey);
396 
397             // If the user switches to a voice mail provider and we have numbers stored for it we
398             // will automatically change the phone's voice mail and forwarding number to the stored
399             // ones. Otherwise we will bring up provider's configuration UI.
400             if (newProviderSettings == null) {
401                 // Force the user into a configuration of the chosen provider
402                 Log.w(LOG_TAG, "Saved preferences not found - invoking config");
403                 mVMProviderSettingsForced = true;
404                 simulatePreferenceClick(mVoicemailSettings);
405             } else {
406                 if (DBG) log("Saved preferences found - switching to them");
407                 // Set this flag so if we get a failure we revert to previous provider
408                 mChangingVMorFwdDueToProviderChange = true;
409                 saveVoiceMailAndForwardingNumber(newProviderKey, newProviderSettings);
410             }
411         }
412         // Always let the preference setting proceed.
413         return true;
414     }
415 
416     /**
417      * Implemented for EditPhoneNumberPreference.GetDefaultNumberListener.
418      * This method set the default values for the various
419      * EditPhoneNumberPreference dialogs.
420      */
421     @Override
onGetDefaultNumber(EditPhoneNumberPreference preference)422     public String onGetDefaultNumber(EditPhoneNumberPreference preference) {
423         if (preference == mSubMenuVoicemailSettings) {
424             // update the voicemail number field, which takes care of the
425             // mSubMenuVoicemailSettings itself, so we should return null.
426             if (DBG) log("updating default for voicemail dialog");
427             updateVoiceNumberField();
428             return null;
429         }
430 
431         String vmDisplay = mPhone.getVoiceMailNumber();
432         if (TextUtils.isEmpty(vmDisplay)) {
433             // if there is no voicemail number, we just return null to
434             // indicate no contribution.
435             return null;
436         }
437 
438         // Return the voicemail number prepended with "VM: "
439         if (DBG) log("updating default for call forwarding dialogs");
440         return getString(R.string.voicemail_abbreviated) + " " + vmDisplay;
441     }
442 
443     @Override
onActivityResult(int requestCode, int resultCode, Intent data)444     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
445         if (DBG) {
446             log("onActivityResult: requestCode: " + requestCode
447                     + ", resultCode: " + resultCode
448                     + ", data: " + data);
449         }
450 
451         // there are cases where the contact picker may end up sending us more than one
452         // request.  We want to ignore the request if we're not in the correct state.
453         if (requestCode == VOICEMAIL_PROVIDER_CFG_ID) {
454             boolean failure = false;
455 
456             // No matter how the processing of result goes lets clear the flag
457             if (DBG) log("mVMProviderSettingsForced: " + mVMProviderSettingsForced);
458             final boolean isVMProviderSettingsForced = mVMProviderSettingsForced;
459             mVMProviderSettingsForced = false;
460 
461             String vmNum = null;
462             if (resultCode != RESULT_OK) {
463                 if (DBG) log("onActivityResult: vm provider cfg result not OK.");
464                 failure = true;
465             } else {
466                 if (data == null) {
467                     if (DBG) log("onActivityResult: vm provider cfg result has no data");
468                     failure = true;
469                 } else {
470                     if (data.getBooleanExtra(SIGNOUT_EXTRA, false)) {
471                         if (DBG) log("Provider requested signout");
472                         if (isVMProviderSettingsForced) {
473                             if (DBG) log("Going back to previous provider on signout");
474                             switchToPreviousVoicemailProvider();
475                         } else {
476                             final String victim = mVoicemailProviders.getKey();
477                             if (DBG) log("Relaunching activity and ignoring " + victim);
478                             Intent i = new Intent(ACTION_ADD_VOICEMAIL);
479                             i.putExtra(IGNORE_PROVIDER_EXTRA, victim);
480                             i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
481                             this.startActivity(i);
482                         }
483                         return;
484                     }
485                     vmNum = data.getStringExtra(VM_NUMBER_EXTRA);
486                     if (vmNum == null || vmNum.length() == 0) {
487                         if (DBG) log("onActivityResult: vm provider cfg result has no vmnum");
488                         failure = true;
489                     }
490                 }
491             }
492             if (failure) {
493                 if (DBG) log("Failure in return from voicemail provider.");
494                 if (isVMProviderSettingsForced) {
495                     switchToPreviousVoicemailProvider();
496                 }
497 
498                 return;
499             }
500             mChangingVMorFwdDueToProviderChange = isVMProviderSettingsForced;
501             final String fwdNum = data.getStringExtra(FWD_NUMBER_EXTRA);
502 
503             // TODO: It would be nice to load the current network setting for this and
504             // send it to the provider when it's config is invoked so it can use this as default
505             final int fwdNumTime = data.getIntExtra(FWD_NUMBER_TIME_EXTRA, 20);
506 
507             if (DBG) log("onActivityResult: cfg result has forwarding number " + fwdNum);
508             saveVoiceMailAndForwardingNumber(mVoicemailProviders.getKey(),
509                     new VoicemailProviderSettings(vmNum, fwdNum, fwdNumTime));
510             return;
511         }
512 
513         if (requestCode == VOICEMAIL_PREF_ID) {
514             if (resultCode != RESULT_OK) {
515                 if (DBG) log("onActivityResult: contact picker result not OK.");
516                 return;
517             }
518 
519             Cursor cursor = null;
520             try {
521                 cursor = getContentResolver().query(data.getData(),
522                     new String[] { CommonDataKinds.Phone.NUMBER }, null, null, null);
523                 if ((cursor == null) || (!cursor.moveToFirst())) {
524                     if (DBG) log("onActivityResult: bad contact data, no results found.");
525                     return;
526                 }
527                 if (mSubMenuVoicemailSettings != null) {
528                     mSubMenuVoicemailSettings.onPickActivityResult(cursor.getString(0));
529                 } else {
530                     Log.w(LOG_TAG, "VoicemailSettingsActivity destroyed while setting contacts.");
531                 }
532                 return;
533             } finally {
534                 if (cursor != null) {
535                     cursor.close();
536                 }
537             }
538         }
539 
540         super.onActivityResult(requestCode, resultCode, data);
541     }
542 
543     /**
544      * Simulates user clicking on a passed preference.
545      * Usually needed when the preference is a dialog preference and we want to invoke
546      * a dialog for this preference programmatically.
547      * TODO: figure out if there is a cleaner way to cause preference dlg to come up
548      */
simulatePreferenceClick(Preference preference)549     private void simulatePreferenceClick(Preference preference) {
550         // Go through settings until we find our setting
551         // and then simulate a click on it to bring up the dialog
552         final ListAdapter adapter = getPreferenceScreen().getRootAdapter();
553         for (int idx = 0; idx < adapter.getCount(); idx++) {
554             if (adapter.getItem(idx) == preference) {
555                 getPreferenceScreen().onItemClick(this.getListView(),
556                         null, idx, adapter.getItemId(idx));
557                 break;
558             }
559         }
560     }
561 
562     /**
563      * Get the boolean config from carrier config manager.
564      *
565      * @param key config key defined in CarrierConfigManager
566      * @return boolean value of corresponding key.
567      */
getBooleanCarrierConfig(String key)568     private boolean getBooleanCarrierConfig(String key) {
569         PersistableBundle b = PhoneGlobals.getInstance()
570                 .getCarrierConfigForSubId(mPhone.getSubId());
571 
572         if (b == null) {
573             b = PhoneGlobals.getInstance().getCarrierConfig();
574         }
575 
576         return b.getBoolean(key);
577     }
578 
579 
580     //*********************************************************************************************
581     // Activity Dialog Methods
582     //*********************************************************************************************
583 
584     @Override
onPrepareDialog(int id, Dialog dialog)585     protected void onPrepareDialog(int id, Dialog dialog) {
586         super.onPrepareDialog(id, dialog);
587         mCurrentDialogId = id;
588     }
589 
590     // dialog creation method, called by showDialog()
591     @Override
onCreateDialog(int dialogId)592     protected Dialog onCreateDialog(int dialogId) {
593         return VoicemailDialogUtil.getDialog(this, dialogId);
594     }
595 
596     @Override
onDialogClosed(EditPhoneNumberPreference preference, int buttonClicked)597     public void onDialogClosed(EditPhoneNumberPreference preference, int buttonClicked) {
598         if (DBG) log("onDialogClosed: Button clicked is " + buttonClicked);
599 
600         if (buttonClicked == DialogInterface.BUTTON_NEGATIVE) {
601             return;
602         }
603 
604         if (preference == mSubMenuVoicemailSettings) {
605             VoicemailProviderSettings newSettings = new VoicemailProviderSettings(
606                     mSubMenuVoicemailSettings.getPhoneNumber(),
607                     VoicemailProviderSettings.NO_FORWARDING);
608             saveVoiceMailAndForwardingNumber(mVoicemailProviders.getKey(), newSettings);
609         }
610     }
611 
612     /**
613      * Wrapper around showDialog() that will silently do nothing if we're
614      * not in the foreground.
615      *
616      * This is useful here because most of the dialogs we display from
617      * this class are triggered by asynchronous events (like
618      * success/failure messages from the telephony layer) and it's
619      * possible for those events to come in even after the user has gone
620      * to a different screen.
621      */
622     // TODO: this is too brittle: it's still easy to accidentally add new
623     // code here that calls showDialog() directly (which will result in a
624     // WindowManager$BadTokenException if called after the activity has
625     // been stopped.)
626     //
627     // It would be cleaner to do the "if (mForeground)" check in one
628     // central place, maybe by using a single Handler for all asynchronous
629     // events (and have *that* discard events if we're not in the
630     // foreground.)
631     //
632     // Unfortunately it's not that simple, since we sometimes need to do
633     // actual work to handle these events whether or not we're in the
634     // foreground (see the Handler code in mSetOptionComplete for
635     // example.)
636     //
637     // TODO: It's a bit worrisome that we don't do anything in error cases when we're not in the
638     // foreground. Consider displaying a toast instead.
showDialogIfForeground(int id)639     private void showDialogIfForeground(int id) {
640         if (mForeground) {
641             showDialog(id);
642         }
643     }
644 
dismissDialogSafely(int id)645     private void dismissDialogSafely(int id) {
646         try {
647             dismissDialog(id);
648         } catch (IllegalArgumentException e) {
649             // This is expected in the case where we were in the background
650             // at the time we would normally have shown the dialog, so we didn't
651             // show it.
652         }
653     }
654 
655     // This is a method implemented for DialogInterface.OnClickListener.
656     // Used with the error dialog to close the app, voicemail dialog to just dismiss.
657     // Close button is mapped to BUTTON_POSITIVE for the errors that close the activity,
658     // while those that are mapped to BUTTON_NEUTRAL only move the preference focus.
onClick(DialogInterface dialog, int which)659     public void onClick(DialogInterface dialog, int which) {
660         if (DBG) log("onClick: button clicked is " + which);
661 
662         dialog.dismiss();
663         switch (which){
664             case DialogInterface.BUTTON_NEGATIVE:
665                 if (mCurrentDialogId == VoicemailDialogUtil.FWD_GET_RESPONSE_ERROR_DIALOG) {
666                     // We failed to get current forwarding settings and the user
667                     // does not wish to continue.
668                     switchToPreviousVoicemailProvider();
669                 }
670                 break;
671             case DialogInterface.BUTTON_POSITIVE:
672                 if (mCurrentDialogId == VoicemailDialogUtil.FWD_GET_RESPONSE_ERROR_DIALOG) {
673                     // We failed to get current forwarding settings but the user
674                     // wishes to continue changing settings to the new vm provider
675                     setVoicemailNumberWithCarrier();
676                 } else {
677                     finish();
678                 }
679                 return;
680             default:
681                 // just let the dialog close and go back to the input
682         }
683 
684         // In all dialogs, all buttons except BUTTON_POSITIVE lead to the end of user interaction
685         // with settings UI. If we were called to explicitly configure voice mail then
686         // we finish the settings activity here to come back to whatever the user was doing.
687         final String action = getIntent() != null ? getIntent().getAction() : null;
688         if (ACTION_ADD_VOICEMAIL.equals(action)) {
689             finish();
690         }
691     }
692 
693 
694     //*********************************************************************************************
695     // Voicemail Methods
696     //*********************************************************************************************
697 
698     /**
699      * TODO: Refactor to make it easier to understand what's done in the different stages.
700      */
saveVoiceMailAndForwardingNumber( String key, VoicemailProviderSettings newSettings)701     private void saveVoiceMailAndForwardingNumber(
702             String key, VoicemailProviderSettings newSettings) {
703         if (DBG) log("saveVoiceMailAndForwardingNumber: " + newSettings.toString());
704         mNewVMNumber = newSettings.getVoicemailNumber();
705         mNewVMNumber = (mNewVMNumber == null) ? "" : mNewVMNumber;
706         mNewFwdSettings = newSettings.getForwardingSettings();
707 
708         // Call forwarding is not suppported on CDMA.
709         if (mPhone.getPhoneType() == PhoneConstants.PHONE_TYPE_CDMA) {
710             if (DBG) log("Ignoring forwarding setting since this is CDMA phone");
711             mNewFwdSettings = VoicemailProviderSettings.NO_FORWARDING;
712         }
713 
714         // Throw a warning if the voicemail is the same and we did not change forwarding.
715         if (mNewVMNumber.equals(mOldVmNumber)
716                 && mNewFwdSettings == VoicemailProviderSettings.NO_FORWARDING) {
717             showDialogIfForeground(VoicemailDialogUtil.VM_NOCHANGE_ERROR_DIALOG);
718             return;
719         }
720 
721         VoicemailProviderSettingsUtil.save(this, key, newSettings);
722         mVMChangeCompletedSuccessfully = false;
723         mFwdChangesRequireRollback = false;
724         mVMOrFwdSetError = 0;
725 
726         if (mNewFwdSettings == VoicemailProviderSettings.NO_FORWARDING
727                 || key.equals(mPreviousVMProviderKey)) {
728             if (DBG) log("Set voicemail number. No changes to forwarding number.");
729             setVoicemailNumberWithCarrier();
730         } else {
731             if (DBG) log("Reading current forwarding settings.");
732             int numSettingsReasons = VoicemailProviderSettings.FORWARDING_SETTINGS_REASONS.length;
733             mForwardingReadResults = new CallForwardInfo[numSettingsReasons];
734             for (int i = 0; i < mForwardingReadResults.length; i++) {
735                 mPhone.getCallForwardingOption(
736                         VoicemailProviderSettings.FORWARDING_SETTINGS_REASONS[i],
737                         CommandsInterface.SERVICE_CLASS_VOICE,
738                         mGetOptionComplete.obtainMessage(EVENT_FORWARDING_GET_COMPLETED, i, 0));
739             }
740             showDialogIfForeground(VoicemailDialogUtil.VM_FWD_READING_DIALOG);
741         }
742     }
743 
744     private final Handler mGetOptionComplete = new Handler() {
745         @Override
746         public void handleMessage(Message msg) {
747             AsyncResult result = (AsyncResult) msg.obj;
748             switch (msg.what) {
749                 case EVENT_FORWARDING_GET_COMPLETED:
750                     handleForwardingSettingsReadResult(result, msg.arg1);
751                     break;
752             }
753         }
754     };
755 
handleForwardingSettingsReadResult(AsyncResult ar, int idx)756     private void handleForwardingSettingsReadResult(AsyncResult ar, int idx) {
757         if (DBG) Log.d(LOG_TAG, "handleForwardingSettingsReadResult: " + idx);
758 
759         Throwable error = null;
760         if (ar.exception != null) {
761             error = ar.exception;
762             if (DBG) Log.d(LOG_TAG, "FwdRead: ar.exception=" + error.getMessage());
763         }
764         if (ar.userObj instanceof Throwable) {
765             error = (Throwable) ar.userObj;
766             if (DBG) Log.d(LOG_TAG, "FwdRead: userObj=" + error.getMessage());
767         }
768 
769         // We may have already gotten an error and decided to ignore the other results.
770         if (mForwardingReadResults == null) {
771             if (DBG) Log.d(LOG_TAG, "Ignoring fwd reading result: " + idx);
772             return;
773         }
774 
775         // In case of error ignore other results, show an error dialog
776         if (error != null) {
777             if (DBG) Log.d(LOG_TAG, "Error discovered for fwd read : " + idx);
778             mForwardingReadResults = null;
779             dismissDialogSafely(VoicemailDialogUtil.VM_FWD_READING_DIALOG);
780             showDialogIfForeground(VoicemailDialogUtil.FWD_GET_RESPONSE_ERROR_DIALOG);
781             return;
782         }
783 
784         // Get the forwarding info.
785         mForwardingReadResults[idx] = CallForwardInfoUtil.getCallForwardInfo(
786                 (CallForwardInfo[]) ar.result,
787                 VoicemailProviderSettings.FORWARDING_SETTINGS_REASONS[idx]);
788 
789         // Check if we got all the results already
790         boolean done = true;
791         for (int i = 0; i < mForwardingReadResults.length; i++) {
792             if (mForwardingReadResults[i] == null) {
793                 done = false;
794                 break;
795             }
796         }
797 
798         if (done) {
799             if (DBG) Log.d(LOG_TAG, "Done receiving fwd info");
800             dismissDialogSafely(VoicemailDialogUtil.VM_FWD_READING_DIALOG);
801 
802             if (mPreviousVMProviderKey.equals(VoicemailProviderListPreference.DEFAULT_KEY)) {
803                 VoicemailProviderSettingsUtil.save(mPhone.getContext(),
804                         VoicemailProviderListPreference.DEFAULT_KEY,
805                         new VoicemailProviderSettings(mOldVmNumber, mForwardingReadResults));
806             }
807             saveVoiceMailAndForwardingNumberStage2();
808         }
809     }
810 
resetForwardingChangeState()811     private void resetForwardingChangeState() {
812         mForwardingChangeResults = new HashMap<Integer, AsyncResult>();
813         mExpectedChangeResultReasons = new HashSet<Integer>();
814     }
815 
816     // Called after we are done saving the previous forwarding settings if we needed.
saveVoiceMailAndForwardingNumberStage2()817     private void saveVoiceMailAndForwardingNumberStage2() {
818         mForwardingChangeResults = null;
819         mVoicemailChangeResult = null;
820 
821         resetForwardingChangeState();
822         for (int i = 0; i < mNewFwdSettings.length; i++) {
823             CallForwardInfo fi = mNewFwdSettings[i];
824             CallForwardInfo fiForReason =
825                     CallForwardInfoUtil.infoForReason(mForwardingReadResults, fi.reason);
826             final boolean doUpdate = CallForwardInfoUtil.isUpdateRequired(fiForReason, fi);
827 
828             if (doUpdate) {
829                 if (DBG) log("Setting fwd #: " + i + ": " + fi.toString());
830                 mExpectedChangeResultReasons.add(i);
831 
832                 CallForwardInfoUtil.setCallForwardingOption(mPhone, fi,
833                         mSetOptionComplete.obtainMessage(
834                                 EVENT_FORWARDING_CHANGED, fi.reason, 0));
835             }
836         }
837         showDialogIfForeground(VoicemailDialogUtil.VM_FWD_SAVING_DIALOG);
838     }
839 
840 
841     /**
842      * Callback to handle option update completions
843      */
844     private final Handler mSetOptionComplete = new Handler() {
845         @Override
846         public void handleMessage(Message msg) {
847             AsyncResult result = (AsyncResult) msg.obj;
848             boolean done = false;
849             switch (msg.what) {
850                 case EVENT_VOICEMAIL_CHANGED:
851                     mVoicemailChangeResult = result;
852                     mVMChangeCompletedSuccessfully = isVmChangeSuccess();
853                     PhoneGlobals.getInstance().refreshMwiIndicator(
854                             mSubscriptionInfoHelper.getSubId());
855                     done = true;
856                     break;
857                 case EVENT_FORWARDING_CHANGED:
858                     mForwardingChangeResults.put(msg.arg1, result);
859                     if (result.exception != null) {
860                         Log.w(LOG_TAG, "Error in setting fwd# " + msg.arg1 + ": " +
861                                 result.exception.getMessage());
862                     }
863                     if (isForwardingCompleted()) {
864                         if (isFwdChangeSuccess()) {
865                             if (DBG) log("Overall fwd changes completed ok, starting vm change");
866                             setVoicemailNumberWithCarrier();
867                         } else {
868                             Log.w(LOG_TAG, "Overall fwd changes completed in failure. " +
869                                     "Check if we need to try rollback for some settings.");
870                             mFwdChangesRequireRollback = false;
871                             Iterator<Map.Entry<Integer,AsyncResult>> it =
872                                 mForwardingChangeResults.entrySet().iterator();
873                             while (it.hasNext()) {
874                                 Map.Entry<Integer,AsyncResult> entry = it.next();
875                                 if (entry.getValue().exception == null) {
876                                     // If at least one succeeded we have to revert
877                                     Log.i(LOG_TAG, "Rollback will be required");
878                                     mFwdChangesRequireRollback = true;
879                                     break;
880                                 }
881                             }
882                             if (!mFwdChangesRequireRollback) {
883                                 Log.i(LOG_TAG, "No rollback needed.");
884                             }
885                             done = true;
886                         }
887                     }
888                     break;
889                 default:
890                     // TODO: should never reach this, may want to throw exception
891             }
892 
893             if (done) {
894                 if (DBG) log("All VM provider related changes done");
895                 if (mForwardingChangeResults != null) {
896                     dismissDialogSafely(VoicemailDialogUtil.VM_FWD_SAVING_DIALOG);
897                 }
898                 handleSetVmOrFwdMessage();
899             }
900         }
901     };
902 
903     /**
904      * Callback to handle option revert completions
905      */
906     private final Handler mRevertOptionComplete = new Handler() {
907         @Override
908         public void handleMessage(Message msg) {
909             AsyncResult result = (AsyncResult) msg.obj;
910             switch (msg.what) {
911                 case EVENT_VOICEMAIL_CHANGED:
912                     if (DBG) log("VM revert complete msg");
913                     mVoicemailChangeResult = result;
914                     break;
915 
916                 case EVENT_FORWARDING_CHANGED:
917                     if (DBG) log("FWD revert complete msg ");
918                     mForwardingChangeResults.put(msg.arg1, result);
919                     if (result.exception != null) {
920                         if (DBG) log("Error in reverting fwd# " + msg.arg1 + ": " +
921                                 result.exception.getMessage());
922                     }
923                     break;
924 
925                 default:
926                     // TODO: should never reach this, may want to throw exception
927             }
928 
929             final boolean done = (!mVMChangeCompletedSuccessfully || mVoicemailChangeResult != null)
930                     && (!mFwdChangesRequireRollback || isForwardingCompleted());
931             if (done) {
932                 if (DBG) log("All VM reverts done");
933                 dismissDialogSafely(VoicemailDialogUtil.VM_REVERTING_DIALOG);
934                 onRevertDone();
935             }
936         }
937     };
938 
setVoicemailNumberWithCarrier()939     private void setVoicemailNumberWithCarrier() {
940         if (DBG) log("save voicemail #: " + mNewVMNumber);
941 
942         mVoicemailChangeResult = null;
943         mPhone.setVoiceMailNumber(
944                 mPhone.getVoiceMailAlphaTag().toString(),
945                 mNewVMNumber,
946                 Message.obtain(mSetOptionComplete, EVENT_VOICEMAIL_CHANGED));
947     }
948 
switchToPreviousVoicemailProvider()949     private void switchToPreviousVoicemailProvider() {
950         if (DBG) log("switchToPreviousVoicemailProvider " + mPreviousVMProviderKey);
951 
952         if (mPreviousVMProviderKey == null) {
953             return;
954         }
955 
956         if (mVMChangeCompletedSuccessfully || mFwdChangesRequireRollback) {
957             showDialogIfForeground(VoicemailDialogUtil.VM_REVERTING_DIALOG);
958             final VoicemailProviderSettings prevSettings =
959                     VoicemailProviderSettingsUtil.load(this, mPreviousVMProviderKey);
960             if (prevSettings == null) {
961                 Log.e(LOG_TAG, "VoicemailProviderSettings for the key \""
962                         + mPreviousVMProviderKey + "\" is null but should be loaded.");
963                 return;
964             }
965 
966             if (mVMChangeCompletedSuccessfully) {
967                 mNewVMNumber = prevSettings.getVoicemailNumber();
968                 Log.i(LOG_TAG, "VM change is already completed successfully."
969                         + "Have to revert VM back to " + mNewVMNumber + " again.");
970                 mPhone.setVoiceMailNumber(
971                         mPhone.getVoiceMailAlphaTag().toString(),
972                         mNewVMNumber,
973                         Message.obtain(mRevertOptionComplete, EVENT_VOICEMAIL_CHANGED));
974             }
975 
976             if (mFwdChangesRequireRollback) {
977                 Log.i(LOG_TAG, "Requested to rollback forwarding changes.");
978 
979                 final CallForwardInfo[] prevFwdSettings = prevSettings.getForwardingSettings();
980                 if (prevFwdSettings != null) {
981                     Map<Integer, AsyncResult> results = mForwardingChangeResults;
982                     resetForwardingChangeState();
983                     for (int i = 0; i < prevFwdSettings.length; i++) {
984                         CallForwardInfo fi = prevFwdSettings[i];
985                         if (DBG) log("Reverting fwd #: " + i + ": " + fi.toString());
986                         // Only revert the settings for which the update succeeded.
987                         AsyncResult result = results.get(fi.reason);
988                         if (result != null && result.exception == null) {
989                             mExpectedChangeResultReasons.add(fi.reason);
990                             CallForwardInfoUtil.setCallForwardingOption(mPhone, fi,
991                                     mRevertOptionComplete.obtainMessage(
992                                             EVENT_FORWARDING_CHANGED, i, 0));
993                         }
994                     }
995                 }
996             }
997         } else {
998             if (DBG) log("No need to revert");
999             onRevertDone();
1000         }
1001     }
1002 
1003 
1004     //*********************************************************************************************
1005     // Voicemail Handler Helpers
1006     //*********************************************************************************************
1007 
1008     /**
1009      * Updates the look of the VM preference widgets based on current VM provider settings.
1010      * Note that the provider name is loaded fxrorm the found activity via loadLabel in
1011      * {@link VoicemailProviderListPreference#initVoiceMailProviders()} in order for it to be
1012      * localizable.
1013      */
updateVMPreferenceWidgets(String currentProviderSetting)1014     private void updateVMPreferenceWidgets(String currentProviderSetting) {
1015         final String key = currentProviderSetting;
1016         final VoicemailProviderListPreference.VoicemailProvider provider =
1017                 mVoicemailProviders.getVoicemailProvider(key);
1018 
1019         /* This is the case when we are coming up on a freshly wiped phone and there is no
1020          persisted value for the list preference mVoicemailProviders.
1021          In this case we want to show the UI asking the user to select a voicemail provider as
1022          opposed to silently falling back to default one. */
1023         if (provider == null) {
1024             if (DBG) log("updateVMPreferenceWidget: key: " + key + " -> null.");
1025 
1026             mVoicemailProviders.setSummary(getString(R.string.sum_voicemail_choose_provider));
1027             mVoicemailSettings.setEnabled(false);
1028             mVoicemailSettings.setIntent(null);
1029         } else {
1030             if (DBG) log("updateVMPreferenceWidget: key: " + key + " -> " + provider.toString());
1031 
1032             final String providerName = provider.name;
1033             mVoicemailProviders.setSummary(providerName);
1034             mVoicemailSettings.setEnabled(true);
1035             mVoicemailSettings.setIntent(provider.intent);
1036         }
1037     }
1038 
1039     /**
1040      * Update the voicemail number from what we've recorded on the sim.
1041      */
updateVoiceNumberField()1042     private void updateVoiceNumberField() {
1043         if (DBG) log("updateVoiceNumberField()");
1044 
1045         mOldVmNumber = mPhone.getVoiceMailNumber();
1046         if (TextUtils.isEmpty(mOldVmNumber)) {
1047             mSubMenuVoicemailSettings.setPhoneNumber("");
1048             mSubMenuVoicemailSettings.setSummary(getString(R.string.voicemail_number_not_set));
1049         } else {
1050             mSubMenuVoicemailSettings.setPhoneNumber(mOldVmNumber);
1051             mSubMenuVoicemailSettings.setSummary(BidiFormatter.getInstance().unicodeWrap(
1052                     mOldVmNumber, TextDirectionHeuristics.LTR));
1053         }
1054     }
1055 
handleSetVmOrFwdMessage()1056     private void handleSetVmOrFwdMessage() {
1057         if (DBG) log("handleSetVMMessage: set VM request complete");
1058 
1059         if (!isFwdChangeSuccess()) {
1060             handleVmOrFwdSetError(VoicemailDialogUtil.FWD_SET_RESPONSE_ERROR_DIALOG);
1061         } else if (!isVmChangeSuccess()) {
1062             handleVmOrFwdSetError(VoicemailDialogUtil.VM_RESPONSE_ERROR_DIALOG);
1063         } else {
1064             handleVmAndFwdSetSuccess(VoicemailDialogUtil.VM_CONFIRM_DIALOG);
1065         }
1066     }
1067 
1068     /**
1069      * Called when Voicemail Provider or its forwarding settings failed. Rolls back partly made
1070      * changes to those settings and show "failure" dialog.
1071      *
1072      * @param dialogId ID of the dialog to show for the specific error case. Either
1073      *     {@link #FWD_SET_RESPONSE_ERROR_DIALOG} or {@link #VM_RESPONSE_ERROR_DIALOG}
1074      */
handleVmOrFwdSetError(int dialogId)1075     private void handleVmOrFwdSetError(int dialogId) {
1076         if (mChangingVMorFwdDueToProviderChange) {
1077             mVMOrFwdSetError = dialogId;
1078             mChangingVMorFwdDueToProviderChange = false;
1079             switchToPreviousVoicemailProvider();
1080             return;
1081         }
1082         mChangingVMorFwdDueToProviderChange = false;
1083         showDialogIfForeground(dialogId);
1084         updateVoiceNumberField();
1085     }
1086 
1087     /**
1088      * Called when Voicemail Provider and its forwarding settings were successfully finished.
1089      * This updates a bunch of variables and show "success" dialog.
1090      */
handleVmAndFwdSetSuccess(int dialogId)1091     private void handleVmAndFwdSetSuccess(int dialogId) {
1092         if (DBG) log("handleVmAndFwdSetSuccess: key is " + mVoicemailProviders.getKey());
1093 
1094         mPreviousVMProviderKey = mVoicemailProviders.getKey();
1095         mChangingVMorFwdDueToProviderChange = false;
1096         showDialogIfForeground(dialogId);
1097         updateVoiceNumberField();
1098     }
1099 
onRevertDone()1100     private void onRevertDone() {
1101         if (DBG) log("onRevertDone: Changing provider key back to " + mPreviousVMProviderKey);
1102 
1103         updateVMPreferenceWidgets(mPreviousVMProviderKey);
1104         updateVoiceNumberField();
1105         if (mVMOrFwdSetError != 0) {
1106             showDialogIfForeground(mVMOrFwdSetError);
1107             mVMOrFwdSetError = 0;
1108         }
1109     }
1110 
1111 
1112     //*********************************************************************************************
1113     // Voicemail State Helpers
1114     //*********************************************************************************************
1115 
1116     /**
1117      * Return true if there is a change result for every reason for which we expect a result.
1118      */
isForwardingCompleted()1119     private boolean isForwardingCompleted() {
1120         if (mForwardingChangeResults == null) {
1121             return true;
1122         }
1123 
1124         for (Integer reason : mExpectedChangeResultReasons) {
1125             if (mForwardingChangeResults.get(reason) == null) {
1126                 return false;
1127             }
1128         }
1129 
1130         return true;
1131     }
1132 
isFwdChangeSuccess()1133     private boolean isFwdChangeSuccess() {
1134         if (mForwardingChangeResults == null) {
1135             return true;
1136         }
1137 
1138         for (AsyncResult result : mForwardingChangeResults.values()) {
1139             Throwable exception = result.exception;
1140             if (exception != null) {
1141                 String msg = exception.getMessage();
1142                 msg = (msg != null) ? msg : "";
1143                 Log.w(LOG_TAG, "Failed to change forwarding setting. Reason: " + msg);
1144                 return false;
1145             }
1146         }
1147         return true;
1148     }
1149 
isVmChangeSuccess()1150     private boolean isVmChangeSuccess() {
1151         if (mVoicemailChangeResult.exception != null) {
1152             String msg = mVoicemailChangeResult.exception.getMessage();
1153             msg = (msg != null) ? msg : "";
1154             Log.w(LOG_TAG, "Failed to change voicemail. Reason: " + msg);
1155             return false;
1156         }
1157         return true;
1158     }
1159 
log(String msg)1160     private static void log(String msg) {
1161         Log.d(LOG_TAG, msg);
1162     }
1163 }
1164