1 /* 2 * Copyright (C) 2006-2011 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.server.am; 18 19 import android.content.Context; 20 import android.database.ContentObserver; 21 import android.net.Uri; 22 import android.os.Bundle; 23 import android.provider.Settings; 24 import android.provider.Settings.SettingNotFoundException; 25 import android.util.Log; 26 27 import java.util.HashMap; 28 import java.util.Map; 29 30 /** 31 * Helper class for watching a set of core settings which the framework 32 * propagates to application processes to avoid multiple lookups and potentially 33 * disk I/O operations. Note: This class assumes that all core settings reside 34 * in {@link Settings.Secure}. 35 */ 36 final class CoreSettingsObserver extends ContentObserver { 37 private static final String LOG_TAG = CoreSettingsObserver.class.getSimpleName(); 38 39 // mapping form property name to its type 40 private static final Map<String, Class<?>> sSecureSettingToTypeMap = new HashMap< 41 String, Class<?>>(); 42 private static final Map<String, Class<?>> sSystemSettingToTypeMap = new HashMap< 43 String, Class<?>>(); 44 private static final Map<String, Class<?>> sGlobalSettingToTypeMap = new HashMap< 45 String, Class<?>>(); 46 static { 47 sSecureSettingToTypeMap.put(Settings.Secure.LONG_PRESS_TIMEOUT, int.class); 48 // add other secure settings here... 49 50 sSystemSettingToTypeMap.put(Settings.System.TIME_12_24, String.class); 51 // add other system settings here... 52 53 sGlobalSettingToTypeMap.put(Settings.Global.DEBUG_VIEW_ATTRIBUTES, int.class); 54 // add other global settings here... 55 } 56 57 private final Bundle mCoreSettings = new Bundle(); 58 59 private final ActivityManagerService mActivityManagerService; 60 61 public CoreSettingsObserver(ActivityManagerService activityManagerService) { 62 super(activityManagerService.mHandler); 63 mActivityManagerService = activityManagerService; 64 beginObserveCoreSettings(); 65 sendCoreSettings(); 66 } 67 68 public Bundle getCoreSettingsLocked() { 69 return (Bundle) mCoreSettings.clone(); 70 } 71 72 @Override 73 public void onChange(boolean selfChange) { 74 synchronized (mActivityManagerService) { 75 sendCoreSettings(); 76 } 77 } 78 79 private void sendCoreSettings() { 80 populateSettings(mCoreSettings, sSecureSettingToTypeMap); 81 populateSettings(mCoreSettings, sSystemSettingToTypeMap); 82 populateSettings(mCoreSettings, sGlobalSettingToTypeMap); 83 mActivityManagerService.onCoreSettingsChange(mCoreSettings); 84 } 85 86 private void beginObserveCoreSettings() { 87 for (String setting : sSecureSettingToTypeMap.keySet()) { 88 Uri uri = Settings.Secure.getUriFor(setting); 89 mActivityManagerService.mContext.getContentResolver().registerContentObserver( 90 uri, false, this); 91 } 92 93 for (String setting : sSystemSettingToTypeMap.keySet()) { 94 Uri uri = Settings.System.getUriFor(setting); 95 mActivityManagerService.mContext.getContentResolver().registerContentObserver( 96 uri, false, this); 97 } 98 99 for (String setting : sGlobalSettingToTypeMap.keySet()) { 100 Uri uri = Settings.Global.getUriFor(setting); 101 mActivityManagerService.mContext.getContentResolver().registerContentObserver( 102 uri, false, this); 103 } 104 } 105 106 private void populateSettings(Bundle snapshot, Map<String, Class<?>> map) { 107 Context context = mActivityManagerService.mContext; 108 for (Map.Entry<String, Class<?>> entry : map.entrySet()) { 109 String setting = entry.getKey(); 110 Class<?> type = entry.getValue(); 111 try { 112 if (type == String.class) { 113 final String value; 114 if (map == sSecureSettingToTypeMap) { 115 value = Settings.Secure.getString(context.getContentResolver(), setting); 116 } else if (map == sSystemSettingToTypeMap) { 117 value = Settings.System.getString(context.getContentResolver(), setting); 118 } else { 119 value = Settings.Global.getString(context.getContentResolver(), setting); 120 } 121 snapshot.putString(setting, value); 122 } else if (type == int.class) { 123 final int value; 124 if (map == sSecureSettingToTypeMap) { 125 value = Settings.Secure.getInt(context.getContentResolver(), setting); 126 } else if (map == sSystemSettingToTypeMap) { 127 value = Settings.System.getInt(context.getContentResolver(), setting); 128 } else { 129 value = Settings.Global.getInt(context.getContentResolver(), setting); 130 } 131 snapshot.putInt(setting, value); 132 } else if (type == float.class) { 133 final float value; 134 if (map == sSecureSettingToTypeMap) { 135 value = Settings.Secure.getFloat(context.getContentResolver(), setting); 136 } else if (map == sSystemSettingToTypeMap) { 137 value = Settings.System.getFloat(context.getContentResolver(), setting); 138 } else { 139 value = Settings.Global.getFloat(context.getContentResolver(), setting); 140 } 141 snapshot.putFloat(setting, value); 142 } else if (type == long.class) { 143 final long value; 144 if (map == sSecureSettingToTypeMap) { 145 value = Settings.Secure.getLong(context.getContentResolver(), setting); 146 } else if (map == sSystemSettingToTypeMap) { 147 value = Settings.System.getLong(context.getContentResolver(), setting); 148 } else { 149 value = Settings.Global.getLong(context.getContentResolver(), setting); 150 } 151 snapshot.putLong(setting, value); 152 } 153 } catch (SettingNotFoundException snfe) { 154 Log.w(LOG_TAG, "Cannot find setting \"" + setting + "\"", snfe); 155 } 156 } 157 } 158 } 159
