/* * Copyright (C) 2011 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.cellbroadcastreceiver; import static android.telephony.SmsCbMessage.MESSAGE_FORMAT_3GPP; import static android.telephony.SmsCbMessage.MESSAGE_FORMAT_3GPP2; import android.annotation.NonNull; import android.app.ActivityManager; import android.app.Notification; import android.app.NotificationChannel; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.ContentValues; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.content.res.Resources; import android.media.AudioAttributes; import android.media.AudioManager; import android.net.Uri; import android.os.Binder; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Looper; import android.os.SystemProperties; import android.os.UserHandle; import android.preference.PreferenceManager; import android.provider.Telephony; import android.service.notification.StatusBarNotification; import android.telephony.PhoneStateListener; import android.telephony.SmsCbEtwsInfo; import android.telephony.SmsCbMessage; import android.telephony.SubscriptionManager; import android.telephony.TelephonyManager; import android.text.TextUtils; import android.util.Log; import com.android.cellbroadcastreceiver.CellBroadcastChannelManager.CellBroadcastChannelRange; import com.android.cellbroadcastservice.CellBroadcastStatsLog; import com.android.internal.annotations.VisibleForTesting; import java.util.ArrayList; import java.util.Locale; /** * This service manages the display and animation of broadcast messages. * Emergency messages display with a flashing animated exclamation mark icon, * and an alert tone is played when the alert is first shown to the user * (but not when the user views a previously received broadcast). */ public class CellBroadcastAlertService extends Service implements AudioManager.OnAudioFocusChangeListener { private static final String TAG = "CBAlertService"; /** Intent action to display alert dialog/notification, after verifying the alert is new. */ @VisibleForTesting public static final String SHOW_NEW_ALERT_ACTION = "cellbroadcastreceiver.SHOW_NEW_ALERT"; /** Identifier for getExtra() when adding this object to an Intent. */ public static final String SMS_CB_MESSAGE_EXTRA = "com.android.cellbroadcastreceiver.SMS_CB_MESSAGE"; /** Use the same notification ID for non-emergency alerts. */ @VisibleForTesting public static final int NOTIFICATION_ID = 1; /** * Notification channel containing for non-emergency alerts. */ static final String NOTIFICATION_CHANNEL_NON_EMERGENCY_ALERTS = "broadcastMessagesNonEmergency"; /** * Notification channel for emergency alerts. This is used when users sneak out of the * noisy pop-up for a real emergency and get a notification due to not officially acknowledged * the alert and want to refer it back later. */ static final String NOTIFICATION_CHANNEL_EMERGENCY_ALERTS = "broadcastMessages"; /** * Notification channel for emergency alerts during voice call. This is used when users in a * voice call, emergency alert will be displayed in a notification format rather than playing * alert tone. */ static final String NOTIFICATION_CHANNEL_EMERGENCY_ALERTS_IN_VOICECALL = "broadcastMessagesInVoiceCall"; /** Intent extra for passing a SmsCbMessage */ private static final String EXTRA_MESSAGE = "message"; /** * Key for accessing message filter from SystemProperties. For testing use. */ private static final String MESSAGE_FILTER_PROPERTY_KEY = "persist.cellbroadcast.message_filter"; private Context mContext; /** * Alert type */ public enum AlertType { DEFAULT, ETWS_DEFAULT, ETWS_EARTHQUAKE, ETWS_TSUNAMI, TEST, AREA, INFO, OTHER } private TelephonyManager mTelephonyManager; private AudioManager mAudioManager; /** * Do not preempt active voice call, instead post notifications and play the ringtone/vibrate * when the voicecall finish */ private static boolean sRemindAfterCallFinish = false; @Override public int onStartCommand(Intent intent, int flags, int startId) { mContext = getApplicationContext(); String action = intent.getAction(); Log.d(TAG, "onStartCommand: " + action); if (Telephony.Sms.Intents.ACTION_SMS_EMERGENCY_CB_RECEIVED.equals(action) || Telephony.Sms.Intents.SMS_CB_RECEIVED_ACTION.equals(action)) { handleCellBroadcastIntent(intent); } else if (SHOW_NEW_ALERT_ACTION.equals(action)) { if (UserHandle.myUserId() == ((ActivityManager) getSystemService( Context.ACTIVITY_SERVICE)).getCurrentUser()) { showNewAlert(intent); } else { Log.d(TAG, "Not active user, ignore the alert display"); } } else { Log.e(TAG, "Unrecognized intent action: " + action); } return START_NOT_STICKY; } @Override public void onCreate() { mTelephonyManager = (TelephonyManager) getApplicationContext().getSystemService(Context.TELEPHONY_SERVICE); mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE); mAudioManager = (AudioManager) getApplicationContext().getSystemService(Context.AUDIO_SERVICE); } @Override public void onDestroy() { // Stop listening for incoming calls. mTelephonyManager.listen(mPhoneStateListener, 0); } /** * Check if we should display the received cell broadcast message. * * @param message Cell broadcast message * @return True if the message should be displayed to the user */ private boolean shouldDisplayMessage(SmsCbMessage message) { TelephonyManager tm = ((TelephonyManager) mContext.getSystemService( Context.TELEPHONY_SERVICE)).createForSubscriptionId(message.getSubscriptionId()); if (tm.getEmergencyCallbackMode() && CellBroadcastSettings.getResources( mContext, message.getSubscriptionId()).getBoolean(R.bool.ignore_messages_in_ecbm)) { // Ignore the message in ECBM. // It is for LTE only mode. For 1xRTT, incoming pages should be ignored in the modem. Log.d(TAG, "ignoring alert of type " + message.getServiceCategory() + " in ECBM"); return false; } // Check if the channel is enabled by the user or configuration. if (!isChannelEnabled(message)) { Log.d(TAG, "ignoring alert of type " + message.getServiceCategory() + " by user preference"); return false; } // Check if message body is empty String msgBody = message.getMessageBody(); if (msgBody == null || msgBody.length() == 0) { Log.e(TAG, "Empty content or Unsupported charset"); return false; } // Check if we need to perform language filtering. CellBroadcastChannelManager channelManager = new CellBroadcastChannelManager(mContext, message.getSubscriptionId()); CellBroadcastChannelRange range = channelManager .getCellBroadcastChannelRangeFromMessage(message); String messageLanguage = message.getLanguageCode(); if (range != null && range.mFilterLanguage) { // language filtering based on CBR second language settings final String secondLanguageCode = CellBroadcastSettings.getResources(mContext, SubscriptionManager.DEFAULT_SUBSCRIPTION_ID) .getString(R.string.emergency_alert_second_language_code); if (!secondLanguageCode.isEmpty()) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); boolean receiveInSecondLanguage = prefs.getBoolean( CellBroadcastSettings.KEY_RECEIVE_CMAS_IN_SECOND_LANGUAGE, false); // For DCS values that bit 6 is 1 and bit 7 is 0, language field is not defined so // ap receives it as null value and so alert is not shown to the user. // bypass language filter in this case. if (!TextUtils.isEmpty(messageLanguage) && !secondLanguageCode.equalsIgnoreCase(messageLanguage)) { Log.w(TAG, "Ignoring message in the unspecified second language:" + messageLanguage); return false; } else if (!receiveInSecondLanguage) { Log.d(TAG, "Ignoring message in second language because setting is off"); return false; } } else { // language filtering based on device language settings. String deviceLanguage = Locale.getDefault().getLanguage(); // Apply If the message's language does not match device's message, we don't // display the message. if (!TextUtils.isEmpty(messageLanguage) && !messageLanguage.equalsIgnoreCase(deviceLanguage)) { Log.d(TAG, "ignoring the alert due to language mismatch. Message lang=" + messageLanguage + ", device lang=" + deviceLanguage); return false; } } } // Check for custom filtering String messageFilters = SystemProperties.get(MESSAGE_FILTER_PROPERTY_KEY, ""); if (!TextUtils.isEmpty(messageFilters)) { String[] filters = messageFilters.split(","); for (String filter : filters) { if (!TextUtils.isEmpty(filter)) { if (message.getMessageBody().toLowerCase().contains(filter)) { Log.i(TAG, "Skipped message due to filter: " + filter); return false; } } } } return true; } private void handleCellBroadcastIntent(Intent intent) { Bundle extras = intent.getExtras(); if (extras == null) { Log.e(TAG, "received SMS_CB_RECEIVED_ACTION with no extras!"); return; } SmsCbMessage message = (SmsCbMessage) extras.get(EXTRA_MESSAGE); if (message == null) { Log.e(TAG, "received SMS_CB_RECEIVED_ACTION with no message extra"); return; } if (message.getMessageFormat() == MESSAGE_FORMAT_3GPP) { CellBroadcastStatsLog.write(CellBroadcastStatsLog.CB_MESSAGE_REPORTED, CellBroadcastStatsLog.CELL_BROADCAST_MESSAGE_REPORTED__TYPE__GSM, CellBroadcastStatsLog.CELL_BROADCAST_MESSAGE_REPORTED__SOURCE__CB_RECEIVER_APP); } else if (message.getMessageFormat() == MESSAGE_FORMAT_3GPP2) { CellBroadcastStatsLog.write(CellBroadcastStatsLog.CB_MESSAGE_REPORTED, CellBroadcastStatsLog.CELL_BROADCAST_MESSAGE_REPORTED__TYPE__CDMA, CellBroadcastStatsLog.CELL_BROADCAST_MESSAGE_REPORTED__SOURCE__CB_RECEIVER_APP); } if (!shouldDisplayMessage(message)) { return; } final Intent alertIntent = new Intent(SHOW_NEW_ALERT_ACTION); alertIntent.setClass(this, CellBroadcastAlertService.class); alertIntent.putExtra(EXTRA_MESSAGE, message); // write to database on a background thread new CellBroadcastContentProvider.AsyncCellBroadcastTask(getContentResolver()) .execute((CellBroadcastContentProvider.CellBroadcastOperation) provider -> { if (provider.insertNewBroadcast(message)) { // new message, show the alert or notification on UI thread startService(alertIntent); // mark the message as displayed to the user. markMessageDisplayed(message); if (CellBroadcastSettings.getResources(mContext, message.getSubscriptionId()) .getBoolean(R.bool.enable_write_alerts_to_sms_inbox)) { // TODO: Should not create the instance of channel manager everywhere. CellBroadcastChannelManager channelManager = new CellBroadcastChannelManager(mContext, message.getSubscriptionId()); CellBroadcastChannelRange range = channelManager .getCellBroadcastChannelRangeFromMessage(message); if (CellBroadcastReceiver.isTestingMode(getApplicationContext()) || (range != null && range.mWriteToSmsInbox)) { writeMessageToSmsInbox(message); } } return true; } else { return false; } }); } /** * Mark the message as displayed in cell broadcast service's database. * * @param message The cell broadcast message. */ private void markMessageDisplayed(SmsCbMessage message) { ContentValues cv = new ContentValues(); cv.put(Telephony.CellBroadcasts.MESSAGE_DISPLAYED, 1); mContext.getContentResolver().update(Telephony.CellBroadcasts.CONTENT_URI, cv, Telephony.CellBroadcasts.RECEIVED_TIME + "=?", new String[] {Long.toString(message.getReceivedTime())}); } private void showNewAlert(Intent intent) { Bundle extras = intent.getExtras(); if (extras == null) { Log.e(TAG, "received SHOW_NEW_ALERT_ACTION with no extras!"); return; } SmsCbMessage cbm = intent.getParcelableExtra(EXTRA_MESSAGE); if (cbm == null) { Log.e(TAG, "received SHOW_NEW_ALERT_ACTION with no message extra"); return; } if (mTelephonyManager.getCallState() != TelephonyManager.CALL_STATE_IDLE && CellBroadcastSettings.getResources(mContext, cbm.getSubscriptionId()) .getBoolean(R.bool.enable_alert_handling_during_call)) { Log.d(TAG, "CMAS received in dialing/during voicecall."); sRemindAfterCallFinish = true; } // Either shown the dialog, adding it to notification (non emergency, or delayed emergency), CellBroadcastChannelManager channelManager = new CellBroadcastChannelManager( mContext, cbm.getSubscriptionId()); if (channelManager.isEmergencyMessage(cbm) && !sRemindAfterCallFinish) { // start alert sound / vibration / TTS and display full-screen alert openEmergencyAlertNotification(cbm); } else { // add notification to the bar by passing the list of unread non-emergency // cell broadcast messages ArrayList messageList = CellBroadcastReceiverApp .addNewMessageToList(cbm); addToNotificationBar(cbm, messageList, this, false); } } /** * Check if the message's channel is enabled on the device. * * @param message the message to check * @return true if the channel is enabled on the device, otherwise false. */ private boolean isChannelEnabled(SmsCbMessage message) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); // Check if all emergency alerts are disabled. boolean emergencyAlertEnabled = prefs.getBoolean(CellBroadcastSettings.KEY_ENABLE_ALERTS_MASTER_TOGGLE, true); SmsCbEtwsInfo etwsInfo = message.getEtwsWarningInfo(); if (etwsInfo != null && etwsInfo.getWarningType() == SmsCbEtwsInfo.ETWS_WARNING_TYPE_TEST_MESSAGE) { return emergencyAlertEnabled && CellBroadcastSettings.isTestAlertsToggleVisible(getApplicationContext()) && PreferenceManager.getDefaultSharedPreferences(this) .getBoolean(CellBroadcastSettings.KEY_ENABLE_TEST_ALERTS, false); } if (message.isEtwsMessage()) { // ETWS messages. // Turn on/off emergency notifications is the only way to turn on/off ETWS messages. return emergencyAlertEnabled; } int channel = message.getServiceCategory(); // Check if the messages are on additional channels enabled by the resource config. // If those channels are enabled by the carrier, but the device is actually roaming, we // should not allow the messages. CellBroadcastChannelManager channelManager = new CellBroadcastChannelManager( mContext, message.getSubscriptionId()); ArrayList ranges = channelManager.getCellBroadcastChannelRanges( R.array.additional_cbs_channels_strings); for (CellBroadcastChannelRange range : ranges) { if (range.mStartId <= channel && range.mEndId >= channel) { // Check if the channel is within the scope. If not, ignore the alert message. if (!channelManager.checkScope(range.mScope)) { Log.d(TAG, "The range [" + range.mStartId + "-" + range.mEndId + "] is not within the scope. mScope = " + range.mScope); return false; } if (range.mAlertType == AlertType.TEST) { return emergencyAlertEnabled && CellBroadcastSettings.isTestAlertsToggleVisible( getApplicationContext()) && PreferenceManager.getDefaultSharedPreferences(this) .getBoolean(CellBroadcastSettings.KEY_ENABLE_TEST_ALERTS, false); } return emergencyAlertEnabled; } } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.emergency_alerts_channels_range_strings)) { return emergencyAlertEnabled && PreferenceManager.getDefaultSharedPreferences(this).getBoolean( CellBroadcastSettings.KEY_ENABLE_EMERGENCY_ALERTS, true); } // CMAS warning types if (channelManager.checkCellBroadcastChannelRange(channel, R.array.cmas_presidential_alerts_channels_range_strings)) { // always enabled return true; } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.cmas_alert_extreme_channels_range_strings)) { return emergencyAlertEnabled && PreferenceManager.getDefaultSharedPreferences(this).getBoolean( CellBroadcastSettings.KEY_ENABLE_CMAS_EXTREME_THREAT_ALERTS, true); } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.cmas_alerts_severe_range_strings)) { return emergencyAlertEnabled && PreferenceManager.getDefaultSharedPreferences(this).getBoolean( CellBroadcastSettings.KEY_ENABLE_CMAS_SEVERE_THREAT_ALERTS, true); } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.cmas_amber_alerts_channels_range_strings)) { return emergencyAlertEnabled && PreferenceManager.getDefaultSharedPreferences(this) .getBoolean(CellBroadcastSettings.KEY_ENABLE_CMAS_AMBER_ALERTS, true); } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.exercise_alert_range_strings) && getResources().getBoolean(R.bool.always_enable_exercise_alert)) { return true; } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.required_monthly_test_range_strings) || channelManager.checkCellBroadcastChannelRange(channel, R.array.exercise_alert_range_strings) || channelManager.checkCellBroadcastChannelRange(channel, R.array.operator_defined_alert_range_strings)) { return emergencyAlertEnabled && CellBroadcastSettings.isTestAlertsToggleVisible(getApplicationContext()) && PreferenceManager.getDefaultSharedPreferences(this) .getBoolean(CellBroadcastSettings.KEY_ENABLE_TEST_ALERTS, false); } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.public_safety_messages_channels_range_strings)) { return emergencyAlertEnabled && PreferenceManager.getDefaultSharedPreferences(this) .getBoolean(CellBroadcastSettings.KEY_ENABLE_PUBLIC_SAFETY_MESSAGES, true); } if (channelManager.checkCellBroadcastChannelRange(channel, R.array.state_local_test_alert_range_strings)) { return emergencyAlertEnabled && PreferenceManager.getDefaultSharedPreferences(this) .getBoolean(CellBroadcastSettings.KEY_ENABLE_STATE_LOCAL_TEST_ALERTS, false); } return true; } /** * Display an alert message for emergency alerts. * @param message the alert to display */ private void openEmergencyAlertNotification(SmsCbMessage message) { // Close dialogs and window shade Intent closeDialogs = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS); sendBroadcast(closeDialogs); // start audio/vibration/speech service for emergency alerts Intent audioIntent = new Intent(this, CellBroadcastAlertAudio.class); audioIntent.setAction(CellBroadcastAlertAudio.ACTION_START_ALERT_AUDIO); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); CellBroadcastChannelManager channelManager = new CellBroadcastChannelManager( mContext, message.getSubscriptionId()); AlertType alertType = AlertType.DEFAULT; if (message.isEtwsMessage()) { alertType = AlertType.ETWS_DEFAULT; if (message.getEtwsWarningInfo() != null) { int warningType = message.getEtwsWarningInfo().getWarningType(); switch (warningType) { case SmsCbEtwsInfo.ETWS_WARNING_TYPE_EARTHQUAKE: case SmsCbEtwsInfo.ETWS_WARNING_TYPE_EARTHQUAKE_AND_TSUNAMI: alertType = AlertType.ETWS_EARTHQUAKE; break; case SmsCbEtwsInfo.ETWS_WARNING_TYPE_TSUNAMI: alertType = AlertType.ETWS_TSUNAMI; break; case SmsCbEtwsInfo.ETWS_WARNING_TYPE_TEST_MESSAGE: alertType = AlertType.TEST; break; case SmsCbEtwsInfo.ETWS_WARNING_TYPE_OTHER_EMERGENCY: alertType = AlertType.OTHER; break; } } } else { int channel = message.getServiceCategory(); ArrayList ranges = channelManager .getAllCellBroadcastChannelRanges(); for (CellBroadcastChannelRange range : ranges) { if (channel >= range.mStartId && channel <= range.mEndId) { alertType = range.mAlertType; break; } } } CellBroadcastChannelRange range = channelManager .getCellBroadcastChannelRangeFromMessage(message); audioIntent.putExtra(CellBroadcastAlertAudio.ALERT_AUDIO_TONE_TYPE, alertType); audioIntent.putExtra( CellBroadcastAlertAudio.ALERT_AUDIO_VIBRATION_PATTERN_EXTRA, (range != null) ? range.mVibrationPattern : CellBroadcastSettings.getResources(mContext, message.getSubscriptionId()) .getIntArray(R.array.default_vibration_pattern)); if (prefs.getBoolean(CellBroadcastSettings.KEY_OVERRIDE_DND, false) || (range != null && range.mOverrideDnd)) { audioIntent.putExtra(CellBroadcastAlertAudio.ALERT_AUDIO_OVERRIDE_DND_EXTRA, true); } String messageBody = message.getMessageBody(); audioIntent.putExtra(CellBroadcastAlertAudio.ALERT_AUDIO_MESSAGE_BODY, messageBody); String language = message.getLanguageCode(); Log.d(TAG, "Message language = " + language); audioIntent.putExtra(CellBroadcastAlertAudio.ALERT_AUDIO_MESSAGE_LANGUAGE, language); audioIntent.putExtra(CellBroadcastAlertAudio.ALERT_AUDIO_SUB_INDEX, message.getSubscriptionId()); audioIntent.putExtra(CellBroadcastAlertAudio.ALERT_AUDIO_DURATION, (range != null) ? range.mAlertDuration : -1); startService(audioIntent); ArrayList messageList = new ArrayList<>(); messageList.add(message); // For FEATURE_WATCH, the dialog doesn't make sense from a UI/UX perspective if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) { addToNotificationBar(message, messageList, this, false); } else { Intent alertDialogIntent = createDisplayMessageIntent(this, CellBroadcastAlertDialog.class, messageList); alertDialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(alertDialogIntent); } } /** * Add the new alert to the notification bar (non-emergency alerts), or launch a * high-priority immediate intent for emergency alerts. * @param message the alert to display */ static void addToNotificationBar(SmsCbMessage message, ArrayList messageList, Context context, boolean fromSaveState) { Resources res = CellBroadcastSettings.getResources(context, message.getSubscriptionId()); int channelTitleId = CellBroadcastResources.getDialogTitleResource(context, message); CharSequence channelName = context.getText(channelTitleId); String messageBody = message.getMessageBody(); final NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); createNotificationChannels(context); // Create intent to show the new messages when user selects the notification. Intent intent; if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) { // For FEATURE_WATCH we want to mark as read intent = createMarkAsReadIntent(context, message.getReceivedTime()); } else { // For anything else we handle it normally intent = createDisplayMessageIntent(context, CellBroadcastAlertDialog.class, messageList); } intent.putExtra(CellBroadcastAlertDialog.FROM_NOTIFICATION_EXTRA, true); intent.putExtra(CellBroadcastAlertDialog.FROM_SAVE_STATE_NOTIFICATION_EXTRA, fromSaveState); PendingIntent pi; if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) { pi = PendingIntent.getBroadcast(context, 0, intent, 0); } else { pi = PendingIntent.getActivity(context, NOTIFICATION_ID, intent, PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_UPDATE_CURRENT); } CellBroadcastChannelManager channelManager = new CellBroadcastChannelManager( context, message.getSubscriptionId()); String channelId = channelManager.isEmergencyMessage(message) ? NOTIFICATION_CHANNEL_EMERGENCY_ALERTS : NOTIFICATION_CHANNEL_NON_EMERGENCY_ALERTS; if (channelId == NOTIFICATION_CHANNEL_EMERGENCY_ALERTS && sRemindAfterCallFinish) { channelId = NOTIFICATION_CHANNEL_EMERGENCY_ALERTS_IN_VOICECALL; } boolean nonSwipeableNotification = message.isEmergencyMessage() && CellBroadcastSettings.getResources(context, message.getSubscriptionId()) .getBoolean(R.bool.non_swipeable_notification) || sRemindAfterCallFinish; // use default sound/vibration/lights for non-emergency broadcasts Notification.Builder builder = new Notification.Builder(context, channelId) .setSmallIcon(R.drawable.ic_warning_googred) .setTicker(channelName) .setWhen(System.currentTimeMillis()) .setCategory(Notification.CATEGORY_SYSTEM) .setPriority(Notification.PRIORITY_HIGH) .setColor(res.getColor(R.color.notification_color)) .setVisibility(Notification.VISIBILITY_PUBLIC) .setOngoing(nonSwipeableNotification); if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) { builder.setDeleteIntent(pi); // FEATURE_WATCH/CWH devices see this as priority builder.setVibrate(new long[]{0}); } else { builder.setContentIntent(pi); // This will break vibration on FEATURE_WATCH, so use it for anything else builder.setDefaults(Notification.DEFAULT_ALL); } // increment unread alert count (decremented when user dismisses alert dialog) int unreadCount = messageList.size(); if (unreadCount > 1) { // use generic count of unread broadcasts if more than one unread builder.setContentTitle(context.getString(R.string.notification_multiple_title)); builder.setContentText(context.getString(R.string.notification_multiple, unreadCount)); } else { builder.setContentTitle(channelName) .setContentText(messageBody) .setStyle(new Notification.BigTextStyle() .bigText(messageBody)); } notificationManager.notify(NOTIFICATION_ID, builder.build()); // FEATURE_WATCH devices do not have global sounds for notifications; only vibrate. // TW requires sounds for 911/919 // Emergency messages use a different audio playback and display path. Since we use // addToNotification for the emergency display on FEATURE WATCH devices vs the // Alert Dialog, it will call this and override the emergency audio tone. if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH) && !channelManager.isEmergencyMessage(message)) { if (res.getBoolean(R.bool.watch_enable_non_emergency_audio)) { // start audio/vibration/speech service for non emergency alerts Intent audioIntent = new Intent(context, CellBroadcastAlertAudio.class); audioIntent.setAction(CellBroadcastAlertAudio.ACTION_START_ALERT_AUDIO); audioIntent.putExtra(CellBroadcastAlertAudio.ALERT_AUDIO_TONE_TYPE, AlertType.OTHER); context.startService(audioIntent); } } } /** * Creates the notification channel and registers it with NotificationManager. If a channel * with the same ID is already registered, NotificationManager will ignore this call. */ static void createNotificationChannels(Context context) { NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.createNotificationChannel( new NotificationChannel( NOTIFICATION_CHANNEL_EMERGENCY_ALERTS, context.getString(R.string.notification_channel_emergency_alerts), NotificationManager.IMPORTANCE_LOW)); final NotificationChannel nonEmergency = new NotificationChannel( NOTIFICATION_CHANNEL_NON_EMERGENCY_ALERTS, context.getString(R.string.notification_channel_broadcast_messages), NotificationManager.IMPORTANCE_DEFAULT); nonEmergency.enableVibration(true); notificationManager.createNotificationChannel(nonEmergency); final NotificationChannel emergencyAlertInVoiceCall = new NotificationChannel( NOTIFICATION_CHANNEL_EMERGENCY_ALERTS_IN_VOICECALL, context.getString(R.string.notification_channel_broadcast_messages_in_voicecall), NotificationManager.IMPORTANCE_HIGH); emergencyAlertInVoiceCall.enableVibration(true); notificationManager.createNotificationChannel(emergencyAlertInVoiceCall); } private static Intent createDisplayMessageIntent(Context context, Class intentClass, ArrayList messageList) { // Trigger the list activity to fire up a dialog that shows the received messages Intent intent = new Intent(context, intentClass); intent.putParcelableArrayListExtra(CellBroadcastAlertService.SMS_CB_MESSAGE_EXTRA, messageList); return intent; } /** * Creates a delete intent that calls to the {@link CellBroadcastReceiver} in order to mark * a message as read * * @param context context of the caller * @param deliveryTime time the message was sent in order to mark as read * @return delete intent to add to the pending intent */ static Intent createMarkAsReadIntent(Context context, long deliveryTime) { Intent deleteIntent = new Intent(context, CellBroadcastReceiver.class); deleteIntent.setAction(CellBroadcastReceiver.ACTION_MARK_AS_READ); deleteIntent.putExtra(CellBroadcastReceiver.EXTRA_DELIVERY_TIME, deliveryTime); return deleteIntent; } @VisibleForTesting @Override public IBinder onBind(Intent intent) { return new LocalBinder(); } @VisibleForTesting class LocalBinder extends Binder { public CellBroadcastAlertService getService() { return CellBroadcastAlertService.this; } } @Override public void onAudioFocusChange(int focusChange) { if(focusChange == AudioManager.AUDIOFOCUS_GAIN) { Log.d(TAG, "audio focus released from voice call, play pending alert if needed"); mAudioManager.abandonAudioFocus(this); playPendingAlert(); } } /** * Remove previous unread notifications and play stored unread * emergency messages after voice call finish. */ private final PhoneStateListener mPhoneStateListener = new PhoneStateListener( new Handler(Looper.getMainLooper())::post) { @Override public void onCallStateChanged(int state, String incomingNumber) { switch (state) { case TelephonyManager.CALL_STATE_IDLE: Log.d(TAG, "onCallStateChanged: CALL_STATE_IDLE"); // check if audio focus was released by voice call. This is to avoid possible // race conditions that voice call did not release audio focus while alert is // playing at the same time (out-of-rhythm) if (mAudioManager == null) { mAudioManager = (AudioManager) getApplicationContext().getSystemService(Context.AUDIO_SERVICE); } int audioFocusResult = mAudioManager.requestAudioFocus( CellBroadcastAlertService.this::onAudioFocusChange, new AudioAttributes.Builder().setLegacyStreamType( AudioManager.STREAM_ALARM).build(), AudioManager.AUDIOFOCUS_GAIN_TRANSIENT, AudioManager.AUDIOFOCUS_FLAG_DELAY_OK); if (audioFocusResult == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) { Log.d(TAG, "audio focus released from voice call, " + "play pending alert if needed"); mAudioManager.abandonAudioFocus( CellBroadcastAlertService.this::onAudioFocusChange); playPendingAlert(); } else { Log.d(TAG, "wait for audio focus release after call"); } break; default: Log.d(TAG, "onCallStateChanged: other state = " + state); break; } } }; private void playPendingAlert() { if (sRemindAfterCallFinish) { sRemindAfterCallFinish = false; NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService( Context.NOTIFICATION_SERVICE); StatusBarNotification[] notificationList = notificationManager.getActiveNotifications(); if(notificationList != null && notificationList.length >0) { notificationManager.cancel(CellBroadcastAlertService.NOTIFICATION_ID); ArrayList newMessageList = CellBroadcastReceiverApp.getNewMessageList(); for (int i = 0; i < newMessageList.size(); i++) { openEmergencyAlertNotification(newMessageList.get(i)); } } CellBroadcastReceiverApp.clearNewMessageList(); } } /** * Write displayed cellbroadcast messages to sms inbox * * @param message The cell broadcast message. */ private void writeMessageToSmsInbox(@NonNull SmsCbMessage message) { // composing SMS ContentValues cv = new ContentValues(); cv.put(Telephony.Sms.Inbox.BODY, message.getMessageBody()); cv.put(Telephony.Sms.Inbox.DATE, message.getReceivedTime()); cv.put(Telephony.Sms.Inbox.SUBSCRIPTION_ID, message.getSubscriptionId()); cv.put(Telephony.Sms.Inbox.SUBJECT, CellBroadcastResources.getDialogTitleResource(mContext, message)); cv.put(Telephony.Sms.Inbox.ADDRESS, mContext.getString(R.string.sms_cb_sender_name)); // store all cellbroadcast messages in the same thread. cv.put(Telephony.Sms.Inbox.THREAD_ID, Telephony.Threads.getOrCreateThreadId(mContext, mContext.getString(R.string.sms_cb_sender_name))); Uri uri = mContext.getContentResolver().insert(Telephony.Sms.Inbox.CONTENT_URI, cv); if (uri == null) { Log.e(TAG, "writeMessageToSmsInbox: failed"); } else { Log.d(TAG, "writeMessageToSmsInbox: succeed uri = " + uri); } } }