/*
* Copyright (C) 2008 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.providers.settings;
import android.app.ActivityManagerNative;
import android.app.IActivityManager;
import android.app.backup.IBackupManager;
import android.content.Context;
import android.content.res.Configuration;
import android.location.LocationManager;
import android.media.AudioManager;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.IPowerManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.UserManager;
import android.provider.Settings;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import java.util.Locale;
public class SettingsHelper {
private static final String SILENT_RINGTONE = "_silent";
private Context mContext;
private AudioManager mAudioManager;
private TelephonyManager mTelephonyManager;
public SettingsHelper(Context context) {
mContext = context;
mAudioManager = (AudioManager) context
.getSystemService(Context.AUDIO_SERVICE);
mTelephonyManager = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
}
/**
* Sets the property via a call to the appropriate API, if any, and returns
* whether or not the setting should be saved to the database as well.
* @param name the name of the setting
* @param value the string value of the setting
* @return whether to continue with writing the value to the database. In
* some cases the data will be written by the call to the appropriate API,
* and in some cases the property value needs to be modified before setting.
*/
public boolean restoreValue(String name, String value) {
if (Settings.System.SCREEN_BRIGHTNESS.equals(name)) {
setBrightness(Integer.parseInt(value));
} else if (Settings.System.SOUND_EFFECTS_ENABLED.equals(name)) {
setSoundEffects(Integer.parseInt(value) == 1);
} else if (Settings.Secure.LOCATION_PROVIDERS_ALLOWED.equals(name)) {
setGpsLocation(value);
return false;
} else if (Settings.Secure.BACKUP_AUTO_RESTORE.equals(name)) {
setAutoRestore(Integer.parseInt(value) == 1);
} else if (isAlreadyConfiguredCriticalAccessibilitySetting(name)) {
return false;
} else if (Settings.System.RINGTONE.equals(name)
|| Settings.System.NOTIFICATION_SOUND.equals(name)) {
setRingtone(name, value);
return false;
}
return true;
}
public String onBackupValue(String name, String value) {
// Special processing for backing up ringtones & notification sounds
if (Settings.System.RINGTONE.equals(name)
|| Settings.System.NOTIFICATION_SOUND.equals(name)) {
if (value == null) {
if (Settings.System.RINGTONE.equals(name)) {
// For ringtones, we need to distinguish between non-telephony vs telephony
if (mTelephonyManager != null && mTelephonyManager.isVoiceCapable()) {
// Backup a null ringtone as silent on voice-capable devices
return SILENT_RINGTONE;
} else {
// Skip backup of ringtone on non-telephony devices.
return null;
}
} else {
// Backup a null notification sound as silent
return SILENT_RINGTONE;
}
} else {
return getCanonicalRingtoneValue(value);
}
}
// Return the original value
return value;
}
/**
* Sets the ringtone of type specified by the name.
*
* @param name should be Settings.System.RINGTONE or Settings.System.NOTIFICATION_SOUND.
* @param value can be a canonicalized uri or "_silent" to indicate a silent (null) ringtone.
*/
private void setRingtone(String name, String value) {
// If it's null, don't change the default
if (value == null) return;
Uri ringtoneUri = null;
if (SILENT_RINGTONE.equals(value)) {
ringtoneUri = null;
} else {
Uri canonicalUri = Uri.parse(value);
ringtoneUri = mContext.getContentResolver().uncanonicalize(canonicalUri);
if (ringtoneUri == null) {
// Unrecognized or invalid Uri, don't restore
return;
}
}
final int ringtoneType = Settings.System.RINGTONE.equals(name)
? RingtoneManager.TYPE_RINGTONE : RingtoneManager.TYPE_NOTIFICATION;
RingtoneManager.setActualDefaultRingtoneUri(mContext, ringtoneType, ringtoneUri);
}
private String getCanonicalRingtoneValue(String value) {
final Uri ringtoneUri = Uri.parse(value);
final Uri canonicalUri = mContext.getContentResolver().canonicalize(ringtoneUri);
return canonicalUri == null ? null : canonicalUri.toString();
}
private boolean isAlreadyConfiguredCriticalAccessibilitySetting(String name) {
// These are the critical accessibility settings that are required for a
// blind user to be able to interact with the device. If these settings are
// already configured, we will not overwrite them. If they are already set,
// it means that the user has performed a global gesture to enable accessibility
// and definitely needs these features working after the restore.
if (Settings.Secure.ACCESSIBILITY_ENABLED.equals(name)
|| Settings.Secure.ACCESSIBILITY_SCRIPT_INJECTION.equals(name)
|| Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD.equals(name)
|| Settings.Secure.TOUCH_EXPLORATION_ENABLED.equals(name)) {
return Settings.Secure.getInt(mContext.getContentResolver(), name, 0) != 0;
} else if (Settings.Secure.TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES.equals(name)
|| Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES.equals(name)) {
return !TextUtils.isEmpty(Settings.Secure.getString(
mContext.getContentResolver(), name));
}
return false;
}
private void setAutoRestore(boolean enabled) {
try {
IBackupManager bm = IBackupManager.Stub.asInterface(
ServiceManager.getService(Context.BACKUP_SERVICE));
if (bm != null) {
bm.setAutoRestore(enabled);
}
} catch (RemoteException e) {}
}
private void setGpsLocation(String value) {
UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE);
if (um.hasUserRestriction(UserManager.DISALLOW_SHARE_LOCATION)) {
return;
}
final String GPS = LocationManager.GPS_PROVIDER;
boolean enabled =
GPS.equals(value) ||
value.startsWith(GPS + ",") ||
value.endsWith("," + GPS) ||
value.contains("," + GPS + ",");
Settings.Secure.setLocationProviderEnabled(
mContext.getContentResolver(), GPS, enabled);
}
private void setSoundEffects(boolean enable) {
if (enable) {
mAudioManager.loadSoundEffects();
} else {
mAudioManager.unloadSoundEffects();
}
}
private void setBrightness(int brightness) {
try {
IPowerManager power = IPowerManager.Stub.asInterface(
ServiceManager.getService("power"));
if (power != null) {
power.setTemporaryScreenBrightnessSettingOverride(brightness);
}
} catch (RemoteException doe) {
}
}
byte[] getLocaleData() {
Configuration conf = mContext.getResources().getConfiguration();
final Locale loc = conf.locale;
String localeString = loc.getLanguage();
String country = loc.getCountry();
if (!TextUtils.isEmpty(country)) {
localeString += "-" + country;
}
return localeString.getBytes();
}
/**
* Sets the locale specified. Input data is the byte representation of a
* BCP-47 language tag. For backwards compatibility, strings of the form
* {@code ll_CC} are also accepted, where {@code ll} is a two letter language
* code and {@code CC} is a two letter country code.
*
* @param data the locale string in bytes.
*/
void setLocaleData(byte[] data, int size) {
// Check if locale was set by the user:
Configuration conf = mContext.getResources().getConfiguration();
// TODO: The following is not working as intended because the network is forcing a locale
// change after registering. Need to find some other way to detect if the user manually
// changed the locale
if (conf.userSetLocale) return; // Don't change if user set it in the SetupWizard
final String[] availableLocales = mContext.getAssets().getLocales();
// Replace "_" with "-" to deal with older backups.
String localeCode = new String(data, 0, size).replace('_', '-');
Locale loc = null;
for (int i = 0; i < availableLocales.length; i++) {
if (availableLocales[i].equals(localeCode)) {
loc = Locale.forLanguageTag(localeCode);
break;
}
}
if (loc == null) return; // Couldn't find the saved locale in this version of the software
try {
IActivityManager am = ActivityManagerNative.getDefault();
Configuration config = am.getConfiguration();
config.locale = loc;
// indicate this isn't some passing default - the user wants this remembered
config.userSetLocale = true;
am.updateConfiguration(config);
} catch (RemoteException e) {
// Intentionally left blank
}
}
/**
* Informs the audio service of changes to the settings so that
* they can be re-read and applied.
*/
void applyAudioSettings() {
AudioManager am = new AudioManager(mContext);
am.reloadAudioSettings();
}
}
|
