| /* |
| * Copyright (C) 2006-2011 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.server.am; |
| |
| import android.content.Context; |
| import android.database.ContentObserver; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.provider.Settings; |
| import android.provider.Settings.SettingNotFoundException; |
| import android.util.Log; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Helper class for watching a set of core settings which the framework |
| * propagates to application processes to avoid multiple lookups and potentially |
| * disk I/O operations. Note: This class assumes that all core settings reside |
| * in {@link Settings.Secure}. |
| */ |
| final class CoreSettingsObserver extends ContentObserver { |
| private static final String LOG_TAG = CoreSettingsObserver.class.getSimpleName(); |
| |
| // mapping form property name to its type |
| private static final Map<String, Class<?>> sCoreSettingToTypeMap = new HashMap< |
| String, Class<?>>(); |
| static { |
| sCoreSettingToTypeMap.put(Settings.Secure.LONG_PRESS_TIMEOUT, int.class); |
| // add other core settings here... |
| } |
| |
| private final Bundle mCoreSettings = new Bundle(); |
| |
| private final ActivityManagerService mActivityManagerService; |
| |
| public CoreSettingsObserver(ActivityManagerService activityManagerService) { |
| super(activityManagerService.mHandler); |
| mActivityManagerService = activityManagerService; |
| beginObserveCoreSettings(); |
| sendCoreSettings(); |
| } |
| |
| public Bundle getCoreSettingsLocked() { |
| return (Bundle) mCoreSettings.clone(); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| synchronized (mActivityManagerService) { |
| sendCoreSettings(); |
| } |
| } |
| |
| private void sendCoreSettings() { |
| populateCoreSettings(mCoreSettings); |
| mActivityManagerService.onCoreSettingsChange(mCoreSettings); |
| } |
| |
| private void beginObserveCoreSettings() { |
| for (String setting : sCoreSettingToTypeMap.keySet()) { |
| Uri uri = Settings.Secure.getUriFor(setting); |
| mActivityManagerService.mContext.getContentResolver().registerContentObserver( |
| uri, false, this); |
| } |
| } |
| |
| private void populateCoreSettings(Bundle snapshot) { |
| Context context = mActivityManagerService.mContext; |
| for (Map.Entry<String, Class<?>> entry : sCoreSettingToTypeMap.entrySet()) { |
| String setting = entry.getKey(); |
| Class<?> type = entry.getValue(); |
| try { |
| if (type == String.class) { |
| String value = Settings.Secure.getString(context.getContentResolver(), |
| setting); |
| snapshot.putString(setting, value); |
| } else if (type == int.class) { |
| int value = Settings.Secure.getInt(context.getContentResolver(), |
| setting); |
| snapshot.putInt(setting, value); |
| } else if (type == float.class) { |
| float value = Settings.Secure.getFloat(context.getContentResolver(), |
| setting); |
| snapshot.putFloat(setting, value); |
| } else if (type == long.class) { |
| long value = Settings.Secure.getLong(context.getContentResolver(), |
| setting); |
| snapshot.putLong(setting, value); |
| } |
| } catch (SettingNotFoundException snfe) { |
| Log.w(LOG_TAG, "Cannot find setting \"" + setting + "\"", snfe); |
| } |
| } |
| } |
| } |