| /* |
| * 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.util.Log; |
| |
| import com.android.cellbroadcastreceiver.CellBroadcastAlertService.AlertType; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * CellBroadcastChannelManager handles the additional cell broadcast channels that |
| * carriers might enable through resources. |
| * Syntax: "<channel id range>:[type=<alert type>], [emergency=true/false]" |
| * For example, |
| * <string-array name="additional_cbs_channels_strings" translatable="false"> |
| * <item>"43008:type=earthquake, emergency=true"</item> |
| * <item>"0xAFEE:type=tsunami, emergency=true"</item> |
| * <item>"0xAC00-0xAFED:type=other"</item> |
| * <item>"1234-5678"</item> |
| * </string-array> |
| * If no tones are specified, the alert type will be set to CMAS_DEFAULT. If emergency is not set, |
| * by default it's not emergency. |
| */ |
| public class CellBroadcastChannelManager { |
| |
| private static final String TAG = "CellBroadcastChannelManager"; |
| |
| private static CellBroadcastChannelManager sInstance = null; |
| |
| /** |
| * Cell broadcast channel range |
| * A range is consisted by starting channel id, ending channel id, and the alert type |
| */ |
| public static class CellBroadcastChannelRange { |
| |
| private static final String KEY_TYPE = "type"; |
| private static final String KEY_EMERGENCY = "emergency"; |
| |
| public int mStartId; |
| public int mEndId; |
| public AlertType mAlertType; |
| public boolean mIsEmergency; |
| |
| public CellBroadcastChannelRange(String channelRange) throws Exception { |
| |
| mAlertType = AlertType.CMAS_DEFAULT; |
| mIsEmergency = false; |
| |
| int colonIndex = channelRange.indexOf(':'); |
| if (colonIndex != -1) { |
| // Parse the alert type and emergency flag |
| String[] pairs = channelRange.substring(colonIndex + 1).trim().split(","); |
| for (String pair : pairs) { |
| pair = pair.trim(); |
| String[] tokens = pair.split("="); |
| if (tokens.length == 2) { |
| String key = tokens[0].trim(); |
| String value = tokens[1].trim(); |
| switch (key) { |
| case KEY_TYPE: |
| mAlertType = AlertType.valueOf(value.toUpperCase()); |
| break; |
| case KEY_EMERGENCY: |
| mIsEmergency = value.equalsIgnoreCase("true"); |
| break; |
| } |
| } |
| } |
| 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 CellBroadcastChannelManager getInstance() { |
| if (sInstance == null) { |
| sInstance = new CellBroadcastChannelManager(); |
| } |
| return sInstance; |
| } |
| |
| /** |
| * Get cell broadcast channels enabled by the carriers. |
| * @param context Application context |
| * @return The list of channel ranges enabled by the carriers. |
| */ |
| public ArrayList<CellBroadcastChannelRange> getCellBroadcastChannelRanges(Context context) { |
| |
| ArrayList<CellBroadcastChannelRange> result = new ArrayList<>(); |
| String[] ranges = context.getResources().getStringArray( |
| R.array.additional_cbs_channels_strings); |
| |
| if (ranges != null) { |
| for (String range : ranges) { |
| try { |
| result.add(new CellBroadcastChannelRange(range)); |
| } catch (Exception e) { |
| loge("Failed to parse \"" + range + "\". e=" + e); |
| } |
| } |
| } |
| |
| return result; |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| |
| private static void loge(String msg) { |
| Log.e(TAG, msg); |
| } |
| } |