| /* |
| * Copyright (C) 2016 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 android.content.Context; |
| import android.os.PersistableBundle; |
| import android.telephony.CarrierConfigManager; |
| import android.util.Log; |
| import android.util.SparseArray; |
| |
| import com.android.cellbroadcastreceiver.CellBroadcastAlertAudio.ToneType; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * CellBroadcastOtherChannelsManager handles the additional cell broadcast channels that |
| * carriers might enable through carrier config app. |
| * Syntax: "<channel id range>:type=<tone type>" |
| * For example, |
| * <string-array name="carrier_additional_cbs_channels_strings" num="3"> |
| * <item value="43008:type=earthquake" /> |
| * <item value="0xAFEE:type=tsunami" /> |
| * <item value="0xAC00-0xAFED:type=other" /> |
| * <item value="1234-5678" /> |
| * </string-array> |
| * If no tones are specified, the tone type will be set to CMAS_DEFAULT. |
| */ |
| public class CellBroadcastOtherChannelsManager { |
| |
| private static final String TAG = "CellBroadcastChannelsManager"; |
| |
| private static CellBroadcastOtherChannelsManager sInstance = null; |
| |
| /** |
| * Channel range caches with sub id as the key. |
| */ |
| private static SparseArray<ArrayList<CellBroadcastChannelRange>> sChannelRanges = |
| new SparseArray<>(); |
| |
| /** |
| * Cell broadcast channel range |
| * A range is consisted by starting channel id, ending channel id, and the tone type |
| */ |
| public static class CellBroadcastChannelRange { |
| public int mStartId; |
| public int mEndId; |
| public ToneType mToneType; |
| |
| public CellBroadcastChannelRange(String channelRange) throws Exception { |
| |
| mToneType = ToneType.CMAS_DEFAULT; |
| |
| int colonIndex = channelRange.indexOf(':'); |
| if (colonIndex != -1){ |
| // Parse the tone type |
| String[] tokens = channelRange.substring(colonIndex + 1).trim().split("="); |
| if (tokens.length == 2 && tokens[0].trim().equalsIgnoreCase("type")) { |
| mToneType = ToneType.valueOf(tokens[1].trim().toUpperCase()); |
| } |
| channelRange = channelRange.substring(0, colonIndex).trim(); |
| } |
| |
| // Parse the channel range |
| int dashIndex = channelRange.indexOf('-'); |
| if (dashIndex != -1) { |
| // range that has start id and end id |
| mStartId = Integer.decode(channelRange.substring(0, dashIndex).trim()); |
| mEndId = Integer.decode(channelRange.substring(dashIndex + 1).trim()); |
| } else { |
| // Not a range, only a single id |
| mStartId = mEndId = Integer.decode(channelRange); |
| } |
| } |
| } |
| |
| /** |
| * Get the instance of the cell broadcast other channel manager |
| * @return The singleton instance |
| */ |
| public static CellBroadcastOtherChannelsManager getInstance() { |
| if (sInstance == null) { |
| sInstance = new CellBroadcastOtherChannelsManager(); |
| } |
| return sInstance; |
| } |
| |
| /** |
| * Get cell broadcast channels enabled by the carriers. |
| * @param context Application context |
| * @param subId Subscription id |
| * @return The list of channel ranges enabled by the carriers. |
| */ |
| public ArrayList<CellBroadcastChannelRange> getCellBroadcastChannelRanges( |
| Context context, int subId) { |
| |
| // Check if the cache already had it. |
| if (sChannelRanges.get(subId) == null) { |
| |
| ArrayList<CellBroadcastChannelRange> result = new ArrayList<>(); |
| String[] ranges; |
| CarrierConfigManager configManager = |
| (CarrierConfigManager) context.getSystemService(Context.CARRIER_CONFIG_SERVICE); |
| |
| if (configManager != null) { |
| PersistableBundle carrierConfig = configManager.getConfigForSubId(subId); |
| |
| if (carrierConfig != null) { |
| ranges = carrierConfig.getStringArray( |
| CarrierConfigManager.KEY_CARRIER_ADDITIONAL_CBS_CHANNELS_STRINGS); |
| |
| if (ranges == null || ranges.length == 0) { |
| log("No additional channels configured."); |
| |
| // If there is nothing configured, store an empty list in the cache |
| // so we won't look up again next time. |
| sChannelRanges.put(subId, result); |
| return result; |
| } |
| |
| for (String range : ranges) { |
| try { |
| result.add(new CellBroadcastChannelRange(range)); |
| } catch (Exception e) { |
| loge("Failed to parse \"" + range + "\". e=" + e); |
| } |
| } |
| |
| sChannelRanges.put(subId, result); |
| |
| } else { |
| loge("Can't get carrier config. subId=" + subId); |
| return null; |
| } |
| } else { |
| loge("Carrier config manager is not available"); |
| return null; |
| } |
| } |
| |
| return sChannelRanges.get(subId); |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| |
| private static void loge(String msg) { |
| Log.e(TAG, msg); |
| } |
| } |