1 /* 2 * Copyright (C) 2015 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.deskclock.data; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.database.ContentObserver; 22 import android.media.Ringtone; 23 import android.media.RingtoneManager; 24 import android.net.Uri; 25 import android.os.Handler; 26 import android.provider.Settings; 27 import android.util.ArrayMap; 28 29 import com.android.deskclock.LogUtils; 30 import com.android.deskclock.R; 31 import com.android.deskclock.provider.Alarm; 32 33 import java.util.Map; 34 35 /** 36 * All alarm data will eventually be accessed via this model. 37 */ 38 final class AlarmModel { 39 40 private final Context mContext; 41 42 /** The model from which settings are fetched. */ 43 private final SettingsModel mSettingsModel; 44 45 /** The uri of the default ringtone to play for new alarms; mirrors last selection. */ 46 private Uri mDefaultAlarmRingtoneUri; 47 48 /** Maps ringtone uri to ringtone title; looking up a title from scratch is expensive. */ 49 private final Map<Uri, String> mRingtoneTitles = new ArrayMap<>(8); 50 AlarmModel(Context context, SettingsModel settingsModel)51 AlarmModel(Context context, SettingsModel settingsModel) { 52 mContext = context; 53 mSettingsModel = settingsModel; 54 55 // Clear caches affected by system settings when system settings change. 56 final ContentResolver cr = mContext.getContentResolver(); 57 final ContentObserver observer = new SystemAlarmAlertChangeObserver(); 58 cr.registerContentObserver(Settings.System.DEFAULT_ALARM_ALERT_URI, false, observer); 59 } 60 getDefaultAlarmRingtoneUri()61 Uri getDefaultAlarmRingtoneUri() { 62 if (mDefaultAlarmRingtoneUri == null) { 63 mDefaultAlarmRingtoneUri = mSettingsModel.getDefaultAlarmRingtoneUri(); 64 } 65 66 return mDefaultAlarmRingtoneUri; 67 } 68 setDefaultAlarmRingtoneUri(Uri uri)69 void setDefaultAlarmRingtoneUri(Uri uri) { 70 mSettingsModel.setDefaultAlarmRingtoneUri(uri); 71 mDefaultAlarmRingtoneUri = uri; 72 } 73 getAlarmRingtoneTitle(Uri uri)74 String getAlarmRingtoneTitle(Uri uri) { 75 // Special case: no ringtone has a title of "Silent". 76 if (Alarm.NO_RINGTONE_URI.equals(uri)) { 77 return mContext.getString(R.string.silent_ringtone_title); 78 } 79 80 // Check the cache. 81 String title = mRingtoneTitles.get(uri); 82 83 if (title == null) { 84 // This is slow because a media player is created during Ringtone object creation. 85 final Ringtone ringtone = RingtoneManager.getRingtone(mContext, uri); 86 if (ringtone == null) { 87 LogUtils.e("No ringtone for uri: %s", uri); 88 return mContext.getString(R.string.unknown_ringtone_title); 89 } 90 91 // Cache the title for later use. 92 title = ringtone.getTitle(mContext); 93 mRingtoneTitles.put(uri, title); 94 } 95 return title; 96 } 97 98 /** 99 * This receiver is notified when system settings change. Cached information built on 100 * those system settings must be cleared. 101 */ 102 private final class SystemAlarmAlertChangeObserver extends ContentObserver { 103 SystemAlarmAlertChangeObserver()104 private SystemAlarmAlertChangeObserver() { 105 super(new Handler()); 106 } 107 108 @Override onChange(boolean selfChange)109 public void onChange(boolean selfChange) { 110 super.onChange(selfChange); 111 112 LogUtils.i("Detected change to system default alarm ringtone; clearing caches"); 113 114 mDefaultAlarmRingtoneUri = null; 115 116 // Titles such as "Default ringtone (Oxygen)" are wrong after default ringtone changes. 117 mRingtoneTitles.clear(); 118 } 119 } 120 }