/
Settings.java
4222 lines (3741 loc) · 153 KB
/
Settings.java
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/*
* Copyright (C) 2006 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 android.provider;
import com.google.android.collect.Maps;
import org.apache.commons.codec.binary.Base64;
import android.annotation.SdkConstant;
import android.annotation.SdkConstant.SdkConstantType;
import android.content.ComponentName;
import android.content.ContentQueryMap;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.IContentProvider;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.SQLException;
import android.net.Uri;
import android.os.*;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.AndroidException;
import android.util.Config;
import android.util.Log;
import java.net.URISyntaxException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
/**
* The Settings provider contains global system-level device preferences.
*/
public final class Settings {
/**
* Intent actions for Settings
*
* @hide
*/
public static final String SETTINGS_CHANGED = "android.settings.SETTINGS_CHANGED_ACTION";
public Settings() {
/* Empty for API conflicts */
}
/**
* Activity Action: Show system settings.
* <p>
* Input: Nothing.
* <p>
* Output: nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_SETTINGS = "android.settings.SETTINGS";
/**
* Activity Action: Show settings to allow configuration of APNs.
* <p>
* Input: Nothing.
* <p>
* Output: nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_APN_SETTINGS = "android.settings.APN_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of current location
* sources.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_LOCATION_SOURCE_SETTINGS =
"android.settings.LOCATION_SOURCE_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of wireless controls
* such as Wi-Fi, Bluetooth and Mobile networks.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_WIRELESS_SETTINGS =
"android.settings.WIRELESS_SETTINGS";
/**
* Activity Action: Show settings to allow entering/exiting airplane mode.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_AIRPLANE_MODE_SETTINGS =
"android.settings.AIRPLANE_MODE_SETTINGS";
/**
* Activity Action: Show settings for accessibility modules.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_ACCESSIBILITY_SETTINGS =
"android.settings.ACCESSIBILITY_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of security and
* location privacy.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_SECURITY_SETTINGS =
"android.settings.SECURITY_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of privacy options.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_PRIVACY_SETTINGS =
"android.settings.PRIVACY_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of Wi-Fi.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_WIFI_SETTINGS =
"android.settings.WIFI_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of a static IP
* address for Wi-Fi.
* <p>
* In some cases, a matching Activity may not exist, so ensure you safeguard
* against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_WIFI_IP_SETTINGS =
"android.settings.WIFI_IP_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of Bluetooth.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_BLUETOOTH_SETTINGS =
"android.settings.BLUETOOTH_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of date and time.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_DATE_SETTINGS =
"android.settings.DATE_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of sound and volume.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_SOUND_SETTINGS =
"android.settings.SOUND_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of display.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_DISPLAY_SETTINGS =
"android.settings.DISPLAY_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of locale.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_LOCALE_SETTINGS =
"android.settings.LOCALE_SETTINGS";
/**
* Activity Action: Show settings to configure input methods, in particular
* allowing the user to enable input methods.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_INPUT_METHOD_SETTINGS =
"android.settings.INPUT_METHOD_SETTINGS";
/**
* Activity Action: Show settings to manage the user input dictionary.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_USER_DICTIONARY_SETTINGS =
"android.settings.USER_DICTIONARY_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of application-related settings.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_APPLICATION_SETTINGS =
"android.settings.APPLICATION_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of application
* development-related settings.
* <p>
* In some cases, a matching Activity may not exist, so ensure you safeguard
* against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_APPLICATION_DEVELOPMENT_SETTINGS =
"android.settings.APPLICATION_DEVELOPMENT_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of quick launch shortcuts.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_QUICK_LAUNCH_SETTINGS =
"android.settings.QUICK_LAUNCH_SETTINGS";
/**
* Activity Action: Show settings to manage installed applications.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_MANAGE_APPLICATIONS_SETTINGS =
"android.settings.MANAGE_APPLICATIONS_SETTINGS";
/**
* Activity Action: Show settings to manage all applications.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_MANAGE_ALL_APPLICATIONS_SETTINGS =
"android.settings.MANAGE_ALL_APPLICATIONS_SETTINGS";
/**
* Activity Action: Show screen of details about a particular application.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: The Intent's data URI specifies the application package name
* to be shown, with the "package" scheme. That is "package:com.my.app".
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_APPLICATION_DETAILS_SETTINGS =
"android.settings.APPLICATION_DETAILS_SETTINGS";
/**
* Activity Action: Show settings for system update functionality.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*
* @hide
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_SYSTEM_UPDATE_SETTINGS =
"android.settings.SYSTEM_UPDATE_SETTINGS";
/**
* Activity Action: Show settings to allow configuration of sync settings.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* The account types available to add via the add account button may be restricted by adding an
* {@link #EXTRA_AUTHORITIES} extra to this Intent with one or more syncable content provider's
* authorities. Only account types which can sync with that content provider will be offered to
* the user.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_SYNC_SETTINGS =
"android.settings.SYNC_SETTINGS";
/**
* Activity Action: Show add account screen for creating a new account.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* The account types available to add may be restricted by adding an {@link #EXTRA_AUTHORITIES}
* extra to the Intent with one or more syncable content provider's authorities. Only account
* types which can sync with that content provider will be offered to the user.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_ADD_ACCOUNT =
"android.settings.ADD_ACCOUNT_SETTINGS";
/**
* Activity Action: Show settings for selecting the network operator.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_NETWORK_OPERATOR_SETTINGS =
"android.settings.NETWORK_OPERATOR_SETTINGS";
/**
* Activity Action: Show settings for selection of 2G/3G.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_DATA_ROAMING_SETTINGS =
"android.settings.DATA_ROAMING_SETTINGS";
/**
* Activity Action: Show settings for internal storage.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_INTERNAL_STORAGE_SETTINGS =
"android.settings.INTERNAL_STORAGE_SETTINGS";
/**
* Activity Action: Show settings for memory card storage.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_MEMORY_CARD_SETTINGS =
"android.settings.MEMORY_CARD_SETTINGS";
/**
* Activity Action: Show settings for global search.
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_SEARCH_SETTINGS =
"android.search.action.SEARCH_SETTINGS";
/**
* Activity Action: Show general device information settings (serial
* number, software version, phone number, etc.).
* <p>
* In some cases, a matching Activity may not exist, so ensure you
* safeguard against this.
* <p>
* Input: Nothing.
* <p>
* Output: Nothing
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_DEVICE_INFO_SETTINGS =
"android.settings.DEVICE_INFO_SETTINGS";
// End of Intent actions for Settings
/**
* @hide - Private call() method on SettingsProvider to read from 'system' table.
*/
public static final String CALL_METHOD_GET_SYSTEM = "GET_system";
/**
* @hide - Private call() method on SettingsProvider to read from 'secure' table.
*/
public static final String CALL_METHOD_GET_SECURE = "GET_secure";
/**
* Activity Extra: Limit available options in launched activity based on the given authority.
* <p>
* This can be passed as an extra field in an Activity Intent with one or more syncable content
* provider's authorities as a String[]. This field is used by some intents to alter the
* behavior of the called activity.
* <p>
* Example: The {@link #ACTION_ADD_ACCOUNT} intent restricts the account types available based
* on the authority given.
*/
public static final String EXTRA_AUTHORITIES =
"authorities";
private static final String JID_RESOURCE_PREFIX = "android";
public static final String AUTHORITY = "settings";
private static final String TAG = "Settings";
private static final boolean LOCAL_LOGV = Config.LOGV || false;
public static class SettingNotFoundException extends AndroidException {
public SettingNotFoundException(String msg) {
super(msg);
}
}
/**
* Common base for tables of name/value settings.
*/
public static class NameValueTable implements BaseColumns {
public static final String NAME = "name";
public static final String VALUE = "value";
protected static boolean putString(ContentResolver resolver, Uri uri,
String name, String value) {
// The database will take care of replacing duplicates.
try {
ContentValues values = new ContentValues();
values.put(NAME, name);
values.put(VALUE, value);
resolver.insert(uri, values);
return true;
} catch (SQLException e) {
Log.w(TAG, "Can't set key " + name + " in " + uri, e);
return false;
}
}
public static Uri getUriFor(Uri uri, String name) {
return Uri.withAppendedPath(uri, name);
}
}
// Thread-safe.
private static class NameValueCache {
private final String mVersionSystemProperty;
private final Uri mUri;
private static final String[] SELECT_VALUE =
new String[] { Settings.NameValueTable.VALUE };
private static final String NAME_EQ_PLACEHOLDER = "name=?";
// Must synchronize on 'this' to access mValues and mValuesVersion.
private final HashMap<String, String> mValues = new HashMap<String, String>();
private long mValuesVersion = 0;
// Initially null; set lazily and held forever. Synchronized on 'this'.
private IContentProvider mContentProvider = null;
// The method we'll call (or null, to not use) on the provider
// for the fast path of retrieving settings.
private final String mCallCommand;
public NameValueCache(String versionSystemProperty, Uri uri, String callCommand) {
mVersionSystemProperty = versionSystemProperty;
mUri = uri;
mCallCommand = callCommand;
}
public String getString(ContentResolver cr, String name) {
long newValuesVersion = SystemProperties.getLong(mVersionSystemProperty, 0);
synchronized (this) {
if (mValuesVersion != newValuesVersion) {
if (LOCAL_LOGV) {
Log.v(TAG, "invalidate [" + mUri.getLastPathSegment() + "]: current " +
newValuesVersion + " != cached " + mValuesVersion);
}
mValues.clear();
mValuesVersion = newValuesVersion;
}
if (mValues.containsKey(name)) {
return mValues.get(name); // Could be null, that's OK -- negative caching
}
}
IContentProvider cp = null;
synchronized (this) {
cp = mContentProvider;
if (cp == null) {
cp = mContentProvider = cr.acquireProvider(mUri.getAuthority());
}
}
// Try the fast path first, not using query(). If this
// fails (alternate Settings provider that doesn't support
// this interface?) then we fall back to the query/table
// interface.
if (mCallCommand != null) {
try {
Bundle b = cp.call(mCallCommand, name, null);
if (b != null) {
String value = b.getPairValue();
synchronized (this) {
mValues.put(name, value);
}
return value;
}
// If the response Bundle is null, we fall through
// to the query interface below.
} catch (RemoteException e) {
// Not supported by the remote side? Fall through
// to query().
}
}
Cursor c = null;
try {
c = cp.query(mUri, SELECT_VALUE, NAME_EQ_PLACEHOLDER,
new String[]{name}, null);
if (c == null) {
Log.w(TAG, "Can't get key " + name + " from " + mUri);
return null;
}
String value = c.moveToNext() ? c.getString(0) : null;
synchronized (this) {
mValues.put(name, value);
}
if (LOCAL_LOGV) {
Log.v(TAG, "cache miss [" + mUri.getLastPathSegment() + "]: " +
name + " = " + (value == null ? "(null)" : value));
}
return value;
} catch (RemoteException e) {
Log.w(TAG, "Can't get key " + name + " from " + mUri, e);
return null; // Return null, but don't cache it.
} finally {
if (c != null) c.close();
}
}
}
/**
* System settings, containing miscellaneous system preferences. This
* table holds simple name/value pairs. There are convenience
* functions for accessing individual settings entries.
*/
public static final class System extends NameValueTable {
public static final String SYS_PROP_SETTING_VERSION = "sys.settings_system_version";
// Populated lazily, guarded by class object:
private static NameValueCache sNameValueCache = null;
private static final HashSet<String> MOVED_TO_SECURE;
static {
MOVED_TO_SECURE = new HashSet<String>(30);
MOVED_TO_SECURE.add(Secure.ADB_ENABLED);
MOVED_TO_SECURE.add(Secure.ANDROID_ID);
MOVED_TO_SECURE.add(Secure.BLUETOOTH_ON);
MOVED_TO_SECURE.add(Secure.DATA_ROAMING);
MOVED_TO_SECURE.add(Secure.DEVICE_PROVISIONED);
MOVED_TO_SECURE.add(Secure.HTTP_PROXY);
MOVED_TO_SECURE.add(Secure.INSTALL_NON_MARKET_APPS);
MOVED_TO_SECURE.add(Secure.LOCATION_PROVIDERS_ALLOWED);
MOVED_TO_SECURE.add(Secure.LOCK_PATTERN_ENABLED);
MOVED_TO_SECURE.add(Secure.LOCK_PATTERN_VISIBLE);
MOVED_TO_SECURE.add(Secure.LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED);
MOVED_TO_SECURE.add(Secure.LOGGING_ID);
MOVED_TO_SECURE.add(Secure.PARENTAL_CONTROL_ENABLED);
MOVED_TO_SECURE.add(Secure.PARENTAL_CONTROL_LAST_UPDATE);
MOVED_TO_SECURE.add(Secure.PARENTAL_CONTROL_REDIRECT_URL);
MOVED_TO_SECURE.add(Secure.SETTINGS_CLASSNAME);
MOVED_TO_SECURE.add(Secure.USB_MASS_STORAGE_ENABLED);
MOVED_TO_SECURE.add(Secure.USE_GOOGLE_MAIL);
MOVED_TO_SECURE.add(Secure.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON);
MOVED_TO_SECURE.add(Secure.WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY);
MOVED_TO_SECURE.add(Secure.WIFI_NUM_OPEN_NETWORKS_KEPT);
MOVED_TO_SECURE.add(Secure.WIFI_ON);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_AP_COUNT);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MS);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNT);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_MAX_AP_CHECKS);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_ON);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_PING_COUNT);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_PING_DELAY_MS);
MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_PING_TIMEOUT_MS);
}
/**
* Look up a name in the database.
* @param resolver to access the database with
* @param name to look up in the table
* @return the corresponding value, or null if not present
*/
public synchronized static String getString(ContentResolver resolver, String name) {
if (MOVED_TO_SECURE.contains(name)) {
Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
+ " to android.provider.Settings.Secure, returning read-only value.");
return Secure.getString(resolver, name);
}
if (sNameValueCache == null) {
sNameValueCache = new NameValueCache(SYS_PROP_SETTING_VERSION, CONTENT_URI,
CALL_METHOD_GET_SYSTEM);
}
return sNameValueCache.getString(resolver, name);
}
/**
* Store a name/value pair into the database.
* @param resolver to access the database with
* @param name to store
* @param value to associate with the name
* @return true if the value was set, false on database errors
*/
public static boolean putString(ContentResolver resolver, String name, String value) {
if (MOVED_TO_SECURE.contains(name)) {
Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
+ " to android.provider.Settings.Secure, value is unchanged.");
return false;
}
return putString(resolver, CONTENT_URI, name, value);
}
/**
* Construct the content URI for a particular name/value pair,
* useful for monitoring changes with a ContentObserver.
* @param name to look up in the table
* @return the corresponding content URI, or null if not present
*/
public static Uri getUriFor(String name) {
if (MOVED_TO_SECURE.contains(name)) {
Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
+ " to android.provider.Settings.Secure, returning Secure URI.");
return Secure.getUriFor(Secure.CONTENT_URI, name);
}
return getUriFor(CONTENT_URI, name);
}
/**
* Convenience function for retrieving a single system settings value
* as an integer. Note that internally setting values are always
* stored as strings; this function converts the string to an integer
* for you. The default value will be returned if the setting is
* not defined or not an integer.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to retrieve.
* @param def Value to return if the setting is not defined.
*
* @return The setting's current value, or 'def' if it is not defined
* or not a valid integer.
*/
public static int getInt(ContentResolver cr, String name, int def) {
String v = getString(cr, name);
try {
return v != null ? Integer.parseInt(v) : def;
} catch (NumberFormatException e) {
return def;
}
}
/**
* Convenience function for retrieving a single system settings value
* as an integer. Note that internally setting values are always
* stored as strings; this function converts the string to an integer
* for you.
* <p>
* This version does not take a default value. If the setting has not
* been set, or the string value is not a number,
* it throws {@link SettingNotFoundException}.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to retrieve.
*
* @throws SettingNotFoundException Thrown if a setting by the given
* name can't be found or the setting value is not an integer.
*
* @return The setting's current value.
*/
public static int getInt(ContentResolver cr, String name)
throws SettingNotFoundException {
String v = getString(cr, name);
try {
return Integer.parseInt(v);
} catch (NumberFormatException e) {
throw new SettingNotFoundException(name);
}
}
/**
* Convenience function for updating a single settings value as an
* integer. This will either create a new entry in the table if the
* given name does not exist, or modify the value of the existing row
* with that name. Note that internally setting values are always
* stored as strings, so this function converts the given value to a
* string before storing it.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to modify.
* @param value The new value for the setting.
* @return true if the value was set, false on database errors
*/
public static boolean putInt(ContentResolver cr, String name, int value) {
return putString(cr, name, Integer.toString(value));
}
/**
* Convenience function for retrieving a single system settings value
* as a {@code long}. Note that internally setting values are always
* stored as strings; this function converts the string to a {@code long}
* for you. The default value will be returned if the setting is
* not defined or not a {@code long}.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to retrieve.
* @param def Value to return if the setting is not defined.
*
* @return The setting's current value, or 'def' if it is not defined
* or not a valid {@code long}.
*/
public static long getLong(ContentResolver cr, String name, long def) {
String valString = getString(cr, name);
long value;
try {
value = valString != null ? Long.parseLong(valString) : def;
} catch (NumberFormatException e) {
value = def;
}
return value;
}
/**
* Convenience function for retrieving a single system settings value
* as a {@code long}. Note that internally setting values are always
* stored as strings; this function converts the string to a {@code long}
* for you.
* <p>
* This version does not take a default value. If the setting has not
* been set, or the string value is not a number,
* it throws {@link SettingNotFoundException}.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to retrieve.
*
* @return The setting's current value.
* @throws SettingNotFoundException Thrown if a setting by the given
* name can't be found or the setting value is not an integer.
*/
public static long getLong(ContentResolver cr, String name)
throws SettingNotFoundException {
String valString = getString(cr, name);
try {
return Long.parseLong(valString);
} catch (NumberFormatException e) {
throw new SettingNotFoundException(name);
}
}
/**
* Convenience function for updating a single settings value as a long
* integer. This will either create a new entry in the table if the
* given name does not exist, or modify the value of the existing row
* with that name. Note that internally setting values are always
* stored as strings, so this function converts the given value to a
* string before storing it.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to modify.
* @param value The new value for the setting.
* @return true if the value was set, false on database errors
*/
public static boolean putLong(ContentResolver cr, String name, long value) {
return putString(cr, name, Long.toString(value));
}
/**
* Convenience function for retrieving a single system settings value
* as a floating point number. Note that internally setting values are
* always stored as strings; this function converts the string to an
* float for you. The default value will be returned if the setting
* is not defined or not a valid float.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to retrieve.
* @param def Value to return if the setting is not defined.
*
* @return The setting's current value, or 'def' if it is not defined
* or not a valid float.
*/
public static float getFloat(ContentResolver cr, String name, float def) {
String v = getString(cr, name);
try {
return v != null ? Float.parseFloat(v) : def;
} catch (NumberFormatException e) {
return def;
}
}
/**
* Convenience function for retrieving a single system settings value
* as a float. Note that internally setting values are always
* stored as strings; this function converts the string to a float
* for you.
* <p>
* This version does not take a default value. If the setting has not
* been set, or the string value is not a number,
* it throws {@link SettingNotFoundException}.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to retrieve.
*
* @throws SettingNotFoundException Thrown if a setting by the given
* name can't be found or the setting value is not a float.
*
* @return The setting's current value.
*/
public static float getFloat(ContentResolver cr, String name)
throws SettingNotFoundException {
String v = getString(cr, name);
try {
return Float.parseFloat(v);
} catch (NumberFormatException e) {
throw new SettingNotFoundException(name);
}
}
/**
* Convenience function for updating a single settings value as a
* floating point number. This will either create a new entry in the
* table if the given name does not exist, or modify the value of the
* existing row with that name. Note that internally setting values
* are always stored as strings, so this function converts the given
* value to a string before storing it.
*
* @param cr The ContentResolver to access.
* @param name The name of the setting to modify.
* @param value The new value for the setting.
* @return true if the value was set, false on database errors
*/
public static boolean putFloat(ContentResolver cr, String name, float value) {
return putString(cr, name, Float.toString(value));