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Merge "Settings are restored in alphabetical order rather in order of dependency." into ics-factoryrom

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This commit is contained in:
Svetoslav Ganov
2011-09-21 19:06:26 -07:00
committed by Android (Google) Code Review
parent 90fb9aa93a a571a5836c
commit 624181af38
2 changed files with 136 additions and 121 deletions
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13
core/java/android/provider/Settings.java
View File

@@ -1882,6 +1882,11 @@ public final class Settings {
/**
* Settings to backup. This is here so that it's in the same place as the settings
* keys and easy to update.
*
* NOTE: Settings are backed up and restored in the order they appear
* in this array. If you have one setting depending on another,
* make sure that they are ordered appropriately.
*
* @hide
*/
public static final String[] SETTINGS_TO_BACKUP = {
@@ -4048,6 +4053,12 @@ public final class Settings {
public static final String PACKAGE_VERIFIER_TIMEOUT = "verifier_timeout";
/**
* This are the settings to be backed up.
*
* NOTE: Settings are backed up and restored in the order they appear
* in this array. If you have one setting depending on another,
* make sure that they are ordered appropriately.
*
* @hide
*/
public static final String[] SETTINGS_TO_BACKUP = {
@@ -4056,11 +4067,11 @@ public final class Settings {
PARENTAL_CONTROL_ENABLED,
PARENTAL_CONTROL_REDIRECT_URL,
USB_MASS_STORAGE_ENABLED,
ACCESSIBILITY_ENABLED,
ACCESSIBILITY_SCRIPT_INJECTION,
BACKUP_AUTO_RESTORE,
ENABLED_ACCESSIBILITY_SERVICES,
TOUCH_EXPLORATION_ENABLED,
ACCESSIBILITY_ENABLED,
TTS_USE_DEFAULTS,
TTS_DEFAULT_RATE,
TTS_DEFAULT_PITCH,

244
packages/SettingsProvider/src/com/android/providers/settings/SettingsBackupAgent.java
View File

@@ -16,6 +16,21 @@
package com.android.providers.settings;
import android.app.backup.BackupAgentHelper;
import android.app.backup.BackupDataInput;
import android.app.backup.BackupDataOutput;
import android.app.backup.FullBackupDataOutput;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.net.wifi.WifiManager;
import android.os.FileUtils;
import android.os.ParcelFileDescriptor;
import android.os.Process;
import android.provider.Settings;
import android.util.Log;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
@@ -27,28 +42,13 @@ import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.CRC32;
import android.app.backup.BackupDataInput;
import android.app.backup.BackupDataOutput;
import android.app.backup.BackupAgentHelper;
import android.app.backup.FullBackupDataOutput;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.net.wifi.WifiManager;
import android.os.FileUtils;
import android.os.ParcelFileDescriptor;
import android.os.Process;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.Log;
/**
* Performs backup and restore of the System and Secure settings.
* List of settings that are backed up are stored in the Settings.java file
@@ -79,8 +79,7 @@ public class SettingsBackupAgent extends BackupAgentHelper {
// Versioning of the 'full backup' format
private static final int FULL_BACKUP_VERSION = 1;
private static String[] sortedSystemKeys = null;
private static String[] sortedSecureKeys = null;
private static final int INTEGER_BYTE_COUNT = Integer.SIZE / Byte.SIZE;
private static final byte[] EMPTY_DATA = new byte[0];
@@ -112,6 +111,7 @@ public class SettingsBackupAgent extends BackupAgentHelper {
private WifiManager mWfm;
private static String mWifiConfigFile;
@Override
public void onCreate() {
if (DEBUG_BACKUP) Log.d(TAG, "onCreate() invoked");
@@ -348,26 +348,17 @@ public class SettingsBackupAgent extends BackupAgentHelper {
}
private byte[] getSystemSettings() {
Cursor sortedCursor = getContentResolver().query(Settings.System.CONTENT_URI, PROJECTION,
null, null, Settings.NameValueTable.NAME);
// Copy and sort the array
if (sortedSystemKeys == null) {
sortedSystemKeys = copyAndSort(Settings.System.SETTINGS_TO_BACKUP);
}
byte[] result = extractRelevantValues(sortedCursor, sortedSystemKeys);
sortedCursor.close();
Cursor cursor = getContentResolver().query(Settings.System.CONTENT_URI, PROJECTION, null,
null, null);
byte[] result = extractRelevantValues(cursor, Settings.System.SETTINGS_TO_BACKUP);
cursor.close();
return result;
}
private byte[] getSecureSettings() {
Cursor sortedCursor = getContentResolver().query(Settings.Secure.CONTENT_URI, PROJECTION,
null, null, Settings.NameValueTable.NAME);
// Copy and sort the array
if (sortedSecureKeys == null) {
sortedSecureKeys = copyAndSort(Settings.Secure.SETTINGS_TO_BACKUP);
}
byte[] result = extractRelevantValues(sortedCursor, sortedSecureKeys);
sortedCursor.close();
Cursor cursor = getContentResolver().query(Settings.Secure.CONTENT_URI, PROJECTION, null,
null, null);
byte[] result = extractRelevantValues(cursor, Settings.Secure.SETTINGS_TO_BACKUP);
return result;
}
@@ -383,119 +374,132 @@ public class SettingsBackupAgent extends BackupAgentHelper {
}
private void restoreSettings(byte[] settings, int bytes, Uri contentUri) {
if (DEBUG) Log.i(TAG, "restoreSettings: " + contentUri);
if (DEBUG) {
Log.i(TAG, "restoreSettings: " + contentUri);
}
// Figure out the white list.
String[] whitelist = null;
if (contentUri.equals(Settings.Secure.CONTENT_URI)) {
whitelist = Settings.Secure.SETTINGS_TO_BACKUP;
} else if (contentUri.equals(Settings.System.CONTENT_URI)) {
whitelist = Settings.System.SETTINGS_TO_BACKUP;
} else {
throw new IllegalArgumentException("Unknown URI: " + contentUri);
}
ContentValues cv = new ContentValues(2);
// Restore only the white list data.
int pos = 0;
while (pos < bytes) {
int length = readInt(settings, pos);
pos += 4;
String settingName = length > 0? new String(settings, pos, length) : null;
pos += length;
length = readInt(settings, pos);
pos += 4;
String settingValue = length > 0? new String(settings, pos, length) : null;
pos += length;
if (!TextUtils.isEmpty(settingName) && !TextUtils.isEmpty(settingValue)) {
//Log.i(TAG, "Restore " + settingName + " = " + settingValue);
Map<String, String> cachedEntries = new HashMap<String, String>();
ContentValues contentValues = new ContentValues(2);
SettingsHelper settingsHelper = mSettingsHelper;
// Only restore settings in our list of known-acceptable data
if (invalidSavedSetting(whitelist, settingName)) {
continue;
}
final int whiteListSize = whitelist.length;
for (int i = 0; i < whiteListSize; i++) {
String key = whitelist[i];
String value = cachedEntries.remove(key);
if (mSettingsHelper.restoreValue(settingName, settingValue)) {
cv.clear();
cv.put(Settings.NameValueTable.NAME, settingName);
cv.put(Settings.NameValueTable.VALUE, settingValue);
getContentResolver().insert(contentUri, cv);
// If the value not cached, let us look it up.
if (value == null) {
while (pos < bytes) {
int length = readInt(settings, pos);
pos += INTEGER_BYTE_COUNT;
String dataKey = length > 0 ? new String(settings, pos, length) : null;
pos += length;
length = readInt(settings, pos);
pos += INTEGER_BYTE_COUNT;
String dataValue = length > 0 ? new String(settings, pos, length) : null;
pos += length;
if (key.equals(dataKey)) {
value = dataValue;
break;
}
cachedEntries.put(dataKey, dataValue);
}
}
}
}
// Returns 'true' if the given setting is one that we refuse to restore
private boolean invalidSavedSetting(String[] knownNames, String candidate) {
// no filter? allow everything
if (knownNames == null) {
return false;
}
if (value == null) {
continue;
}
// whitelisted setting? allow it
for (String name : knownNames) {
if (name.equals(candidate)) {
return false;
if (settingsHelper.restoreValue(key, value)) {
contentValues.clear();
contentValues.put(Settings.NameValueTable.NAME, key);
contentValues.put(Settings.NameValueTable.VALUE, value);
getContentResolver().insert(contentUri, contentValues);
}
if (DEBUG) {
Log.d(TAG, "Restored setting: " + key + "=" + value);
}
}
// refuse everything else
if (DEBUG) Log.v(TAG, "Ignoring restore datum: " + candidate);
return true;
}
private String[] copyAndSort(String[] keys) {
String[] sortedKeys = new String[keys.length];
System.arraycopy(keys, 0, sortedKeys, 0, keys.length);
Arrays.sort(sortedKeys);
return sortedKeys;
}
/**
* Given a cursor sorted by key name and a set of keys sorted by name,
* extract the required keys and values and write them to a byte array.
* @param sortedCursor
* @param sortedKeys
* @return
* Given a cursor and a set of keys, extract the required keys and
* values and write them to a byte array.
*
* @param cursor A cursor with settings data.
* @param settings The settings to extract.
* @return The byte array of extracted values.
*/
byte[] extractRelevantValues(Cursor sortedCursor, String[] sortedKeys) {
byte[][] values = new byte[sortedKeys.length * 2][]; // keys and values
if (!sortedCursor.moveToFirst()) {
private byte[] extractRelevantValues(Cursor cursor, String[] settings) {
final int settingsCount = settings.length;
byte[][] values = new byte[settingsCount * 2][]; // keys and values
if (!cursor.moveToFirst()) {
Log.e(TAG, "Couldn't read from the cursor");
return new byte[0];
}
int keyIndex = 0;
// Obtain the relevant data in a temporary array.
int totalSize = 0;
while (!sortedCursor.isAfterLast()) {
String name = sortedCursor.getString(COLUMN_NAME);
while (sortedKeys[keyIndex].compareTo(name.toString()) < 0) {
keyIndex++;
if (keyIndex == sortedKeys.length) break;
}
if (keyIndex < sortedKeys.length && name.equals(sortedKeys[keyIndex])) {
String value = sortedCursor.getString(COLUMN_VALUE);
byte[] nameBytes = name.toString().getBytes();
totalSize += 4 + nameBytes.length;
values[keyIndex * 2] = nameBytes;
byte[] valueBytes;
if (TextUtils.isEmpty(value)) {
valueBytes = null;
totalSize += 4;
} else {
valueBytes = value.toString().getBytes();
totalSize += 4 + valueBytes.length;
//Log.i(TAG, "Backing up " + name + " = " + value);
int backedUpSettingIndex = 0;
Map<String, String> cachedEntries = new HashMap<String, String>();
for (int i = 0; i < settingsCount; i++) {
String key = settings[i];
String value = cachedEntries.remove(key);
// If the value not cached, let us look it up.
if (value == null) {
while (!cursor.isAfterLast()) {
String cursorKey = cursor.getString(COLUMN_NAME);
String cursorValue = cursor.getString(COLUMN_VALUE);
cursor.moveToNext();
if (key.equals(cursorKey)) {
value = cursorValue;
break;
}
cachedEntries.put(cursorKey, cursorValue);
}
values[keyIndex * 2 + 1] = valueBytes;
keyIndex++;
}
if (keyIndex == sortedKeys.length || !sortedCursor.moveToNext()) {
break;
if (value == null) {
continue;
}
// Write the key and value in the intermediary array.
byte[] keyBytes = key.getBytes();
totalSize += INTEGER_BYTE_COUNT + keyBytes.length;
values[backedUpSettingIndex * 2] = keyBytes;
byte[] valueBytes = value.getBytes();
totalSize += INTEGER_BYTE_COUNT + valueBytes.length;
values[backedUpSettingIndex * 2 + 1] = valueBytes;
backedUpSettingIndex++;
if (DEBUG) {
Log.d(TAG, "Backed up setting: " + key + "=" + value);
}
}
// Aggregate the result.
byte[] result = new byte[totalSize];
int pos = 0;
for (int i = 0; i < sortedKeys.length * 2; i++) {
if (values[i] != null) {
pos = writeInt(result, pos, values[i].length);
pos = writeBytes(result, pos, values[i]);
}
final int keyValuePairCount = backedUpSettingIndex * 2;
for (int i = 0; i < keyValuePairCount; i++) {
pos = writeInt(result, pos, values[i].length);
pos = writeBytes(result, pos, values[i]);
}
return result;
}
@@ -647,14 +651,14 @@ public class SettingsBackupAgent extends BackupAgentHelper {
* @param out byte array
* @param pos current pos in array
* @param value integer to write
* @return the index after adding the size of an int (4)
* @return the index after adding the size of an int (4) in bytes.
*/
private int writeInt(byte[] out, int pos, int value) {
out[pos + 0] = (byte) ((value >> 24) & 0xFF);
out[pos + 1] = (byte) ((value >> 16) & 0xFF);
out[pos + 2] = (byte) ((value >> 8) & 0xFF);
out[pos + 3] = (byte) ((value >> 0) & 0xFF);
return pos + 4;
return pos + INTEGER_BYTE_COUNT;
}
private int writeBytes(byte[] out, int pos, byte[] value) {