| /* |
| * Copyright (C) 2013 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.launcher3; |
| |
| import android.app.backup.BackupDataInputStream; |
| import android.app.backup.BackupDataOutput; |
| import android.app.backup.BackupHelper; |
| import android.app.backup.BackupManager; |
| import android.content.ComponentName; |
| import android.content.ContentResolver; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.ActivityInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.PackageManager.NameNotFoundException; |
| import android.content.pm.ResolveInfo; |
| import android.content.res.XmlResourceParser; |
| import android.database.Cursor; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.graphics.Point; |
| import android.graphics.drawable.Drawable; |
| import android.os.ParcelFileDescriptor; |
| import android.text.TextUtils; |
| import android.util.Base64; |
| import android.util.Log; |
| |
| import com.android.launcher3.LauncherSettings.Favorites; |
| import com.android.launcher3.LauncherSettings.WorkspaceScreens; |
| import com.android.launcher3.backup.nano.BackupProtos; |
| import com.android.launcher3.backup.nano.BackupProtos.CheckedMessage; |
| import com.android.launcher3.backup.nano.BackupProtos.DeviceProfieData; |
| import com.android.launcher3.backup.nano.BackupProtos.Favorite; |
| import com.android.launcher3.backup.nano.BackupProtos.Journal; |
| import com.android.launcher3.backup.nano.BackupProtos.Key; |
| import com.android.launcher3.backup.nano.BackupProtos.Resource; |
| import com.android.launcher3.backup.nano.BackupProtos.Screen; |
| import com.android.launcher3.backup.nano.BackupProtos.Widget; |
| import com.android.launcher3.compat.AppWidgetManagerCompat; |
| import com.android.launcher3.compat.UserHandleCompat; |
| import com.android.launcher3.compat.UserManagerCompat; |
| import com.android.launcher3.model.GridSizeMigrationTask; |
| import com.android.launcher3.util.Thunk; |
| import com.google.protobuf.nano.InvalidProtocolBufferNanoException; |
| import com.google.protobuf.nano.MessageNano; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.net.URISyntaxException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.zip.CRC32; |
| |
| /** |
| * Persist the launcher home state across calamities. |
| */ |
| public class LauncherBackupHelper implements BackupHelper { |
| private static final String TAG = "LauncherBackupHelper"; |
| private static final boolean VERBOSE = LauncherBackupAgentHelper.VERBOSE; |
| private static final boolean DEBUG = LauncherBackupAgentHelper.DEBUG; |
| |
| private static final int BACKUP_VERSION = 4; |
| private static final int MAX_JOURNAL_SIZE = 1000000; |
| |
| // Journal key is such that it is always smaller than any dynamically generated |
| // key (any Base64 encoded string). |
| private static final String JOURNAL_KEY = "#"; |
| |
| /** icons are large, dribble them out */ |
| private static final int MAX_ICONS_PER_PASS = 10; |
| |
| /** widgets contain previews, which are very large, dribble them out */ |
| private static final int MAX_WIDGETS_PER_PASS = 5; |
| |
| private static final String[] FAVORITE_PROJECTION = { |
| Favorites._ID, // 0 |
| Favorites.MODIFIED, // 1 |
| Favorites.INTENT, // 2 |
| Favorites.APPWIDGET_PROVIDER, // 3 |
| Favorites.APPWIDGET_ID, // 4 |
| Favorites.CELLX, // 5 |
| Favorites.CELLY, // 6 |
| Favorites.CONTAINER, // 7 |
| Favorites.ICON, // 8 |
| Favorites.ICON_PACKAGE, // 9 |
| Favorites.ICON_RESOURCE, // 10 |
| Favorites.ICON_TYPE, // 11 |
| Favorites.ITEM_TYPE, // 12 |
| Favorites.SCREEN, // 13 |
| Favorites.SPANX, // 14 |
| Favorites.SPANY, // 15 |
| Favorites.TITLE, // 16 |
| Favorites.PROFILE_ID, // 17 |
| Favorites.RANK, // 18 |
| }; |
| |
| private static final int ID_INDEX = 0; |
| private static final int ID_MODIFIED = 1; |
| private static final int INTENT_INDEX = 2; |
| private static final int APPWIDGET_PROVIDER_INDEX = 3; |
| private static final int APPWIDGET_ID_INDEX = 4; |
| private static final int CELLX_INDEX = 5; |
| private static final int CELLY_INDEX = 6; |
| private static final int CONTAINER_INDEX = 7; |
| private static final int ICON_INDEX = 8; |
| private static final int ICON_PACKAGE_INDEX = 9; |
| private static final int ICON_RESOURCE_INDEX = 10; |
| private static final int ICON_TYPE_INDEX = 11; |
| private static final int ITEM_TYPE_INDEX = 12; |
| private static final int SCREEN_INDEX = 13; |
| private static final int SPANX_INDEX = 14; |
| private static final int SPANY_INDEX = 15; |
| private static final int TITLE_INDEX = 16; |
| private static final int RANK_INDEX = 18; |
| |
| private static final String[] SCREEN_PROJECTION = { |
| WorkspaceScreens._ID, // 0 |
| WorkspaceScreens.MODIFIED, // 1 |
| WorkspaceScreens.SCREEN_RANK // 2 |
| }; |
| |
| private static final int SCREEN_RANK_INDEX = 2; |
| |
| @Thunk final Context mContext; |
| private final HashSet<String> mExistingKeys; |
| private final ArrayList<Key> mKeys; |
| private final ItemTypeMatcher[] mItemTypeMatchers; |
| private final long mUserSerial; |
| |
| private BackupManager mBackupManager; |
| private byte[] mBuffer = new byte[512]; |
| private long mLastBackupRestoreTime; |
| private boolean mBackupDataWasUpdated; |
| |
| private IconCache mIconCache; |
| private DeviceProfieData mDeviceProfileData; |
| private InvariantDeviceProfile mIdp; |
| |
| DeviceProfieData migrationCompatibleProfileData; |
| HashSet<String> widgetSizes = new HashSet<>(); |
| |
| boolean restoreSuccessful; |
| int restoredBackupVersion = 1; |
| |
| // When migrating from a device which different hotseat configuration, the icons are shifted |
| // to center along the new all-apps icon. |
| private int mHotseatShift = 0; |
| |
| public LauncherBackupHelper(Context context) { |
| mContext = context; |
| mExistingKeys = new HashSet<String>(); |
| mKeys = new ArrayList<Key>(); |
| restoreSuccessful = true; |
| mItemTypeMatchers = new ItemTypeMatcher[CommonAppTypeParser.SUPPORTED_TYPE_COUNT]; |
| |
| UserManagerCompat userManager = UserManagerCompat.getInstance(mContext); |
| mUserSerial = userManager.getSerialNumberForUser(UserHandleCompat.myUserHandle()); |
| } |
| |
| private void dataChanged() { |
| if (mBackupManager == null) { |
| mBackupManager = new BackupManager(mContext); |
| } |
| mBackupManager.dataChanged(); |
| } |
| |
| private void applyJournal(Journal journal) { |
| mLastBackupRestoreTime = journal.t; |
| mExistingKeys.clear(); |
| if (journal.key != null) { |
| for (Key key : journal.key) { |
| mExistingKeys.add(keyToBackupKey(key)); |
| } |
| } |
| restoredBackupVersion = journal.backupVersion; |
| } |
| |
| /** |
| * Back up launcher data so we can restore the user's state on a new device. |
| * |
| * <P>The journal is a timestamp and a list of keys that were saved as of that time. |
| * |
| * <P>Keys may come back in any order, so each key/value is one complete row of the database. |
| * |
| * @param oldState notes from the last backup |
| * @param data incremental key/value pairs to persist off-device |
| * @param newState notes for the next backup |
| */ |
| @Override |
| public void performBackup(ParcelFileDescriptor oldState, BackupDataOutput data, |
| ParcelFileDescriptor newState) { |
| if (VERBOSE) Log.v(TAG, "onBackup"); |
| |
| Journal in = readJournal(oldState); |
| if (!launcherIsReady()) { |
| dataChanged(); |
| // Perform backup later. |
| writeJournal(newState, in); |
| return; |
| } |
| |
| if (mDeviceProfileData == null) { |
| LauncherAppState app = LauncherAppState.getInstance(); |
| mIdp = app.getInvariantDeviceProfile(); |
| mDeviceProfileData = initDeviceProfileData(mIdp); |
| mIconCache = app.getIconCache(); |
| } |
| |
| Log.v(TAG, "lastBackupTime = " + in.t); |
| mKeys.clear(); |
| applyJournal(in); |
| |
| // Record the time before performing backup so that entries edited while the backup |
| // was going on, do not get missed in next backup. |
| long newBackupTime = System.currentTimeMillis(); |
| mBackupDataWasUpdated = false; |
| try { |
| backupFavorites(data); |
| backupScreens(data); |
| backupIcons(data); |
| backupWidgets(data); |
| |
| // Delete any key which still exist in the old backup, but is not valid anymore. |
| HashSet<String> validKeys = new HashSet<String>(); |
| for (Key key : mKeys) { |
| validKeys.add(keyToBackupKey(key)); |
| } |
| mExistingKeys.removeAll(validKeys); |
| |
| // Delete anything left in the existing keys. |
| for (String deleted: mExistingKeys) { |
| if (VERBOSE) Log.v(TAG, "dropping deleted item " + deleted); |
| data.writeEntityHeader(deleted, -1); |
| mBackupDataWasUpdated = true; |
| } |
| |
| mExistingKeys.clear(); |
| if (!mBackupDataWasUpdated) { |
| // Check if any metadata has changed |
| mBackupDataWasUpdated = (in.profile == null) |
| || !Arrays.equals(DeviceProfieData.toByteArray(in.profile), |
| DeviceProfieData.toByteArray(mDeviceProfileData)) |
| || (in.backupVersion != BACKUP_VERSION) |
| || (in.appVersion != getAppVersion()); |
| } |
| |
| if (mBackupDataWasUpdated) { |
| mLastBackupRestoreTime = newBackupTime; |
| |
| // We store the journal at two places. |
| // 1) Storing it in newState allows us to do partial backups by comparing old state |
| // 2) Storing it in backup data allows us to validate keys during restore |
| Journal state = getCurrentStateJournal(); |
| writeRowToBackup(JOURNAL_KEY, state, data); |
| } else { |
| if (DEBUG) Log.d(TAG, "Nothing was written during backup"); |
| } |
| } catch (IOException e) { |
| Log.e(TAG, "launcher backup has failed", e); |
| } |
| |
| writeNewStateDescription(newState); |
| } |
| |
| /** |
| * @return true if the backup corresponding to oldstate can be successfully applied |
| * to this device. |
| */ |
| private boolean isBackupCompatible(Journal oldState) { |
| DeviceProfieData currentProfile = mDeviceProfileData; |
| DeviceProfieData oldProfile = oldState.profile; |
| |
| if (oldProfile == null || oldProfile.desktopCols == 0) { |
| // Profile info is not valid, ignore the check. |
| return true; |
| } |
| |
| boolean isHotseatCompatible = false; |
| if (currentProfile.allappsRank >= oldProfile.hotseatCount) { |
| isHotseatCompatible = true; |
| mHotseatShift = 0; |
| } |
| |
| if ((currentProfile.allappsRank >= oldProfile.allappsRank) |
| && ((currentProfile.hotseatCount - currentProfile.allappsRank) >= |
| (oldProfile.hotseatCount - oldProfile.allappsRank))) { |
| // There is enough space on both sides of the hotseat. |
| isHotseatCompatible = true; |
| mHotseatShift = currentProfile.allappsRank - oldProfile.allappsRank; |
| } |
| |
| if (!isHotseatCompatible) { |
| return false; |
| } |
| if ((currentProfile.desktopCols >= oldProfile.desktopCols) |
| && (currentProfile.desktopRows >= oldProfile.desktopRows)) { |
| return true; |
| } |
| |
| if (GridSizeMigrationTask.ENABLED) { |
| // One time migrate the workspace when launcher starts. |
| migrationCompatibleProfileData = initDeviceProfileData(mIdp); |
| migrationCompatibleProfileData.desktopCols = oldProfile.desktopCols; |
| migrationCompatibleProfileData.desktopRows = oldProfile.desktopRows; |
| migrationCompatibleProfileData.hotseatCount = oldProfile.hotseatCount; |
| migrationCompatibleProfileData.allappsRank = oldProfile.allappsRank; |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Restore launcher configuration from the restored data stream. |
| * It assumes that the keys will arrive in lexical order. So if the journal was present in the |
| * backup, it should arrive first. |
| * |
| * @param data the key/value pair from the server |
| */ |
| @Override |
| public void restoreEntity(BackupDataInputStream data) { |
| if (!restoreSuccessful) { |
| return; |
| } |
| |
| if (mDeviceProfileData == null) { |
| // This call does not happen on a looper thread. So LauncherAppState |
| // can't be created . Instead initialize required dependencies directly. |
| mIdp = new InvariantDeviceProfile(mContext); |
| mDeviceProfileData = initDeviceProfileData(mIdp); |
| mIconCache = new IconCache(mContext, mIdp); |
| } |
| |
| int dataSize = data.size(); |
| if (mBuffer.length < dataSize) { |
| mBuffer = new byte[dataSize]; |
| } |
| try { |
| int bytesRead = data.read(mBuffer, 0, dataSize); |
| if (DEBUG) Log.d(TAG, "read " + bytesRead + " of " + dataSize + " available"); |
| String backupKey = data.getKey(); |
| |
| if (JOURNAL_KEY.equals(backupKey)) { |
| if (VERBOSE) Log.v(TAG, "Journal entry restored"); |
| if (!mKeys.isEmpty()) { |
| // We received the journal key after a restore key. |
| Log.wtf(TAG, keyToBackupKey(mKeys.get(0)) + " received after " + JOURNAL_KEY); |
| restoreSuccessful = false; |
| return; |
| } |
| |
| Journal journal = new Journal(); |
| MessageNano.mergeFrom(journal, readCheckedBytes(mBuffer, dataSize)); |
| applyJournal(journal); |
| restoreSuccessful = isBackupCompatible(journal); |
| return; |
| } |
| |
| if (!mExistingKeys.isEmpty() && !mExistingKeys.contains(backupKey)) { |
| if (DEBUG) Log.e(TAG, "Ignoring key not present in the backup state " + backupKey); |
| return; |
| } |
| Key key = backupKeyToKey(backupKey); |
| mKeys.add(key); |
| switch (key.type) { |
| case Key.FAVORITE: |
| restoreFavorite(key, mBuffer, dataSize); |
| break; |
| |
| case Key.SCREEN: |
| restoreScreen(key, mBuffer, dataSize); |
| break; |
| |
| case Key.ICON: |
| restoreIcon(key, mBuffer, dataSize); |
| break; |
| |
| case Key.WIDGET: |
| restoreWidget(key, mBuffer, dataSize); |
| break; |
| |
| default: |
| Log.w(TAG, "unknown restore entity type: " + key.type); |
| mKeys.remove(key); |
| break; |
| } |
| } catch (IOException e) { |
| Log.w(TAG, "ignoring unparsable backup entry", e); |
| } |
| } |
| |
| /** |
| * Record the restore state for the next backup. |
| * |
| * @param newState notes about the backup state after restore. |
| */ |
| @Override |
| public void writeNewStateDescription(ParcelFileDescriptor newState) { |
| writeJournal(newState, getCurrentStateJournal()); |
| } |
| |
| private Journal getCurrentStateJournal() { |
| Journal journal = new Journal(); |
| journal.t = mLastBackupRestoreTime; |
| journal.key = mKeys.toArray(new BackupProtos.Key[mKeys.size()]); |
| journal.appVersion = getAppVersion(); |
| journal.backupVersion = BACKUP_VERSION; |
| journal.profile = mDeviceProfileData; |
| return journal; |
| } |
| |
| private int getAppVersion() { |
| try { |
| return mContext.getPackageManager() |
| .getPackageInfo(mContext.getPackageName(), 0).versionCode; |
| } catch (NameNotFoundException e) { |
| return 0; |
| } |
| } |
| |
| private DeviceProfieData initDeviceProfileData(InvariantDeviceProfile profile) { |
| DeviceProfieData data = new DeviceProfieData(); |
| data.desktopRows = profile.numRows; |
| data.desktopCols = profile.numColumns; |
| data.hotseatCount = profile.numHotseatIcons; |
| data.allappsRank = profile.hotseatAllAppsRank; |
| return data; |
| } |
| |
| /** |
| * Write all modified favorites to the data stream. |
| * |
| * @param data output stream for key/value pairs |
| * @throws IOException |
| */ |
| private void backupFavorites(BackupDataOutput data) throws IOException { |
| // persist things that have changed since the last backup |
| ContentResolver cr = mContext.getContentResolver(); |
| // Don't backup apps in other profiles for now. |
| Cursor cursor = cr.query(Favorites.CONTENT_URI, FAVORITE_PROJECTION, |
| getUserSelectionArg(), null, null); |
| try { |
| cursor.moveToPosition(-1); |
| while(cursor.moveToNext()) { |
| final long id = cursor.getLong(ID_INDEX); |
| final long updateTime = cursor.getLong(ID_MODIFIED); |
| Key key = getKey(Key.FAVORITE, id); |
| mKeys.add(key); |
| final String backupKey = keyToBackupKey(key); |
| |
| // Favorite proto changed in v4. Backup again if the version is old. |
| if (!mExistingKeys.contains(backupKey) || updateTime >= mLastBackupRestoreTime |
| || restoredBackupVersion < 4) { |
| writeRowToBackup(key, packFavorite(cursor), data); |
| } else { |
| if (DEBUG) Log.d(TAG, "favorite already backup up: " + id); |
| } |
| } |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| /** |
| * Read a favorite from the stream. |
| * |
| * <P>Keys arrive in any order, so screens and containers may not exist yet. |
| * |
| * @param key identifier for the row |
| * @param buffer the serialized proto from the stream, may be larger than dataSize |
| * @param dataSize the size of the proto from the stream |
| */ |
| private void restoreFavorite(Key key, byte[] buffer, int dataSize) throws IOException { |
| if (VERBOSE) Log.v(TAG, "unpacking favorite " + key.id); |
| if (DEBUG) Log.d(TAG, "read (" + buffer.length + "): " + |
| Base64.encodeToString(buffer, 0, dataSize, Base64.NO_WRAP)); |
| |
| ContentResolver cr = mContext.getContentResolver(); |
| ContentValues values = unpackFavorite(buffer, dataSize); |
| cr.insert(Favorites.CONTENT_URI, values); |
| } |
| |
| /** |
| * Write all modified screens to the data stream. |
| * |
| * @param data output stream for key/value pairs |
| * @throws IOException |
| */ |
| private void backupScreens(BackupDataOutput data) throws IOException { |
| // persist things that have changed since the last backup |
| ContentResolver cr = mContext.getContentResolver(); |
| Cursor cursor = cr.query(WorkspaceScreens.CONTENT_URI, SCREEN_PROJECTION, |
| null, null, null); |
| try { |
| cursor.moveToPosition(-1); |
| if (DEBUG) Log.d(TAG, "dumping screens after: " + mLastBackupRestoreTime); |
| while(cursor.moveToNext()) { |
| final long id = cursor.getLong(ID_INDEX); |
| final long updateTime = cursor.getLong(ID_MODIFIED); |
| Key key = getKey(Key.SCREEN, id); |
| mKeys.add(key); |
| final String backupKey = keyToBackupKey(key); |
| if (!mExistingKeys.contains(backupKey) || updateTime >= mLastBackupRestoreTime) { |
| writeRowToBackup(key, packScreen(cursor), data); |
| } else { |
| if (VERBOSE) Log.v(TAG, "screen already backup up " + id); |
| } |
| } |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| /** |
| * Read a screen from the stream. |
| * |
| * <P>Keys arrive in any order, so children of this screen may already exist. |
| * |
| * @param key identifier for the row |
| * @param buffer the serialized proto from the stream, may be larger than dataSize |
| * @param dataSize the size of the proto from the stream |
| */ |
| private void restoreScreen(Key key, byte[] buffer, int dataSize) throws IOException { |
| if (VERBOSE) Log.v(TAG, "unpacking screen " + key.id); |
| if (DEBUG) Log.d(TAG, "read (" + buffer.length + "): " + |
| Base64.encodeToString(buffer, 0, dataSize, Base64.NO_WRAP)); |
| |
| ContentResolver cr = mContext.getContentResolver(); |
| ContentValues values = unpackScreen(buffer, dataSize); |
| cr.insert(WorkspaceScreens.CONTENT_URI, values); |
| } |
| |
| /** |
| * Write all the static icon resources we need to render placeholders |
| * for a package that is not installed. |
| * |
| * @param data output stream for key/value pairs |
| */ |
| private void backupIcons(BackupDataOutput data) throws IOException { |
| // persist icons that haven't been persisted yet |
| final ContentResolver cr = mContext.getContentResolver(); |
| final int dpi = mContext.getResources().getDisplayMetrics().densityDpi; |
| final UserHandleCompat myUserHandle = UserHandleCompat.myUserHandle(); |
| int backupUpIconCount = 0; |
| |
| // Don't backup apps in other profiles for now. |
| String where = "(" + Favorites.ITEM_TYPE + "=" + Favorites.ITEM_TYPE_APPLICATION + " OR " + |
| Favorites.ITEM_TYPE + "=" + Favorites.ITEM_TYPE_SHORTCUT + ") AND " + |
| getUserSelectionArg(); |
| Cursor cursor = cr.query(Favorites.CONTENT_URI, FAVORITE_PROJECTION, |
| where, null, null); |
| try { |
| cursor.moveToPosition(-1); |
| while(cursor.moveToNext()) { |
| final long id = cursor.getLong(ID_INDEX); |
| final String intentDescription = cursor.getString(INTENT_INDEX); |
| try { |
| Intent intent = Intent.parseUri(intentDescription, 0); |
| ComponentName cn = intent.getComponent(); |
| Key key = null; |
| String backupKey = null; |
| if (cn != null) { |
| key = getKey(Key.ICON, cn.flattenToShortString()); |
| backupKey = keyToBackupKey(key); |
| } else { |
| Log.w(TAG, "empty intent on application favorite: " + id); |
| } |
| if (mExistingKeys.contains(backupKey)) { |
| if (DEBUG) Log.d(TAG, "already saved icon " + backupKey); |
| |
| // remember that we already backed this up previously |
| mKeys.add(key); |
| } else if (backupKey != null) { |
| if (DEBUG) Log.d(TAG, "I can count this high: " + backupUpIconCount); |
| if (backupUpIconCount < MAX_ICONS_PER_PASS) { |
| if (DEBUG) Log.d(TAG, "saving icon " + backupKey); |
| Bitmap icon = mIconCache.getIcon(intent, myUserHandle); |
| if (icon != null && !mIconCache.isDefaultIcon(icon, myUserHandle)) { |
| writeRowToBackup(key, packIcon(dpi, icon), data); |
| mKeys.add(key); |
| backupUpIconCount ++; |
| } |
| } else { |
| if (VERBOSE) Log.v(TAG, "deferring icon backup " + backupKey); |
| // too many icons for this pass, request another. |
| dataChanged(); |
| } |
| } |
| } catch (URISyntaxException e) { |
| Log.e(TAG, "invalid URI on application favorite: " + id); |
| } catch (IOException e) { |
| Log.e(TAG, "unable to save application icon for favorite: " + id); |
| } |
| |
| } |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| /** |
| * Read an icon from the stream. |
| * |
| * <P>Keys arrive in any order, so shortcuts that use this icon may already exist. |
| * |
| * @param key identifier for the row |
| * @param buffer the serialized proto from the stream, may be larger than dataSize |
| * @param dataSize the size of the proto from the stream |
| */ |
| private void restoreIcon(Key key, byte[] buffer, int dataSize) throws IOException { |
| if (VERBOSE) Log.v(TAG, "unpacking icon " + key.id); |
| if (DEBUG) Log.d(TAG, "read (" + buffer.length + "): " + |
| Base64.encodeToString(buffer, 0, dataSize, Base64.NO_WRAP)); |
| |
| Resource res = unpackProto(new Resource(), buffer, dataSize); |
| if (DEBUG) { |
| Log.d(TAG, "unpacked " + res.dpi + " dpi icon"); |
| } |
| Bitmap icon = BitmapFactory.decodeByteArray(res.data, 0, res.data.length); |
| if (icon == null) { |
| Log.w(TAG, "failed to unpack icon for " + key.name); |
| } else { |
| if (VERBOSE) Log.v(TAG, "saving restored icon as: " + key.name); |
| mIconCache.preloadIcon(ComponentName.unflattenFromString(key.name), icon, res.dpi, |
| "" /* label */, mUserSerial, mIdp); |
| } |
| } |
| |
| /** |
| * Write all the static widget resources we need to render placeholders |
| * for a package that is not installed. |
| * |
| * @param data output stream for key/value pairs |
| * @throws IOException |
| */ |
| private void backupWidgets(BackupDataOutput data) throws IOException { |
| // persist static widget info that hasn't been persisted yet |
| final ContentResolver cr = mContext.getContentResolver(); |
| final int dpi = mContext.getResources().getDisplayMetrics().densityDpi; |
| int backupWidgetCount = 0; |
| |
| String where = Favorites.ITEM_TYPE + "=" + Favorites.ITEM_TYPE_APPWIDGET + " AND " |
| + getUserSelectionArg(); |
| Cursor cursor = cr.query(Favorites.CONTENT_URI, FAVORITE_PROJECTION, |
| where, null, null); |
| AppWidgetManagerCompat widgetManager = AppWidgetManagerCompat.getInstance(mContext); |
| try { |
| cursor.moveToPosition(-1); |
| while(cursor.moveToNext()) { |
| final long id = cursor.getLong(ID_INDEX); |
| final String providerName = cursor.getString(APPWIDGET_PROVIDER_INDEX); |
| final ComponentName provider = ComponentName.unflattenFromString(providerName); |
| |
| Key key = null; |
| String backupKey = null; |
| if (provider != null) { |
| key = getKey(Key.WIDGET, providerName); |
| backupKey = keyToBackupKey(key); |
| } else { |
| Log.w(TAG, "empty intent on appwidget: " + id); |
| } |
| |
| // Widget backup proto changed in v3. So add it again if the original backup is old. |
| if (mExistingKeys.contains(backupKey) && restoredBackupVersion >= 3) { |
| if (DEBUG) Log.d(TAG, "already saved widget " + backupKey); |
| |
| // remember that we already backed this up previously |
| mKeys.add(key); |
| } else if (backupKey != null) { |
| if (DEBUG) Log.d(TAG, "I can count this high: " + backupWidgetCount); |
| if (backupWidgetCount < MAX_WIDGETS_PER_PASS) { |
| LauncherAppWidgetProviderInfo widgetInfo = widgetManager |
| .getLauncherAppWidgetInfo(cursor.getInt(APPWIDGET_ID_INDEX)); |
| if (widgetInfo != null) { |
| if (DEBUG) Log.d(TAG, "saving widget " + backupKey); |
| writeRowToBackup(key, packWidget(dpi, widgetInfo), data); |
| mKeys.add(key); |
| backupWidgetCount ++; |
| } |
| } else { |
| if (VERBOSE) Log.v(TAG, "deferring widget backup " + backupKey); |
| // too many widgets for this pass, request another. |
| dataChanged(); |
| } |
| } |
| } |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| /** |
| * Read a widget from the stream. |
| * |
| * <P>Keys arrive in any order, so widgets that use this data may already exist. |
| * |
| * @param key identifier for the row |
| * @param buffer the serialized proto from the stream, may be larger than dataSize |
| * @param dataSize the size of the proto from the stream |
| */ |
| private void restoreWidget(Key key, byte[] buffer, int dataSize) throws IOException { |
| if (VERBOSE) Log.v(TAG, "unpacking widget " + key.id); |
| if (DEBUG) Log.d(TAG, "read (" + buffer.length + "): " + |
| Base64.encodeToString(buffer, 0, dataSize, Base64.NO_WRAP)); |
| Widget widget = unpackProto(new Widget(), buffer, dataSize); |
| if (DEBUG) Log.d(TAG, "unpacked " + widget.provider); |
| if (widget.icon.data != null) { |
| Bitmap icon = BitmapFactory |
| .decodeByteArray(widget.icon.data, 0, widget.icon.data.length); |
| if (icon == null) { |
| Log.w(TAG, "failed to unpack widget icon for " + key.name); |
| } else { |
| mIconCache.preloadIcon(ComponentName.unflattenFromString(widget.provider), |
| icon, widget.icon.dpi, widget.label, mUserSerial, mIdp); |
| } |
| } |
| |
| // Cache widget min sizes incase migration is required. |
| widgetSizes.add(widget.provider + "#" + widget.minSpanX + "," + widget.minSpanY); |
| } |
| |
| /** create a new key, with an integer ID. |
| * |
| * <P> Keys contain their own checksum instead of using |
| * the heavy-weight CheckedMessage wrapper. |
| */ |
| private Key getKey(int type, long id) { |
| Key key = new Key(); |
| key.type = type; |
| key.id = id; |
| key.checksum = checkKey(key); |
| return key; |
| } |
| |
| /** create a new key for a named object. |
| * |
| * <P> Keys contain their own checksum instead of using |
| * the heavy-weight CheckedMessage wrapper. |
| */ |
| private Key getKey(int type, String name) { |
| Key key = new Key(); |
| key.type = type; |
| key.name = name; |
| key.checksum = checkKey(key); |
| return key; |
| } |
| |
| /** keys need to be strings, serialize and encode. */ |
| private String keyToBackupKey(Key key) { |
| return Base64.encodeToString(Key.toByteArray(key), Base64.NO_WRAP); |
| } |
| |
| /** keys need to be strings, decode and parse. */ |
| private Key backupKeyToKey(String backupKey) throws InvalidBackupException { |
| try { |
| Key key = Key.parseFrom(Base64.decode(backupKey, Base64.DEFAULT)); |
| if (key.checksum != checkKey(key)) { |
| throw new InvalidBackupException("invalid key read from stream" + backupKey); |
| } |
| return key; |
| } catch (InvalidProtocolBufferNanoException | IllegalArgumentException e) { |
| throw new InvalidBackupException(e); |
| } |
| } |
| |
| /** Compute the checksum over the important bits of a key. */ |
| private long checkKey(Key key) { |
| CRC32 checksum = new CRC32(); |
| checksum.update(key.type); |
| checksum.update((int) (key.id & 0xffff)); |
| checksum.update((int) ((key.id >> 32) & 0xffff)); |
| if (!TextUtils.isEmpty(key.name)) { |
| checksum.update(key.name.getBytes()); |
| } |
| return checksum.getValue(); |
| } |
| |
| /** |
| * @return true if its an hotseat item, that can be replaced during restore. |
| * TODO: Extend check for folders in hotseat. |
| */ |
| private boolean isReplaceableHotseatItem(Favorite favorite) { |
| return favorite.container == Favorites.CONTAINER_HOTSEAT |
| && favorite.intent != null |
| && (favorite.itemType == Favorites.ITEM_TYPE_APPLICATION |
| || favorite.itemType == Favorites.ITEM_TYPE_SHORTCUT); |
| } |
| |
| /** Serialize a Favorite for persistence, including a checksum wrapper. */ |
| private Favorite packFavorite(Cursor c) { |
| Favorite favorite = new Favorite(); |
| favorite.id = c.getLong(ID_INDEX); |
| favorite.screen = c.getInt(SCREEN_INDEX); |
| favorite.container = c.getInt(CONTAINER_INDEX); |
| favorite.cellX = c.getInt(CELLX_INDEX); |
| favorite.cellY = c.getInt(CELLY_INDEX); |
| favorite.spanX = c.getInt(SPANX_INDEX); |
| favorite.spanY = c.getInt(SPANY_INDEX); |
| favorite.iconType = c.getInt(ICON_TYPE_INDEX); |
| favorite.rank = c.getInt(RANK_INDEX); |
| |
| String title = c.getString(TITLE_INDEX); |
| if (!TextUtils.isEmpty(title)) { |
| favorite.title = title; |
| } |
| String intentDescription = c.getString(INTENT_INDEX); |
| Intent intent = null; |
| if (!TextUtils.isEmpty(intentDescription)) { |
| try { |
| intent = Intent.parseUri(intentDescription, 0); |
| intent.removeExtra(ItemInfo.EXTRA_PROFILE); |
| favorite.intent = intent.toUri(0); |
| } catch (URISyntaxException e) { |
| Log.e(TAG, "Invalid intent", e); |
| } |
| } |
| favorite.itemType = c.getInt(ITEM_TYPE_INDEX); |
| if (favorite.itemType == Favorites.ITEM_TYPE_APPWIDGET) { |
| favorite.appWidgetId = c.getInt(APPWIDGET_ID_INDEX); |
| String appWidgetProvider = c.getString(APPWIDGET_PROVIDER_INDEX); |
| if (!TextUtils.isEmpty(appWidgetProvider)) { |
| favorite.appWidgetProvider = appWidgetProvider; |
| } |
| } else if (favorite.itemType == Favorites.ITEM_TYPE_SHORTCUT) { |
| if (favorite.iconType == Favorites.ICON_TYPE_RESOURCE) { |
| String iconPackage = c.getString(ICON_PACKAGE_INDEX); |
| if (!TextUtils.isEmpty(iconPackage)) { |
| favorite.iconPackage = iconPackage; |
| } |
| String iconResource = c.getString(ICON_RESOURCE_INDEX); |
| if (!TextUtils.isEmpty(iconResource)) { |
| favorite.iconResource = iconResource; |
| } |
| } |
| |
| byte[] blob = c.getBlob(ICON_INDEX); |
| if (blob != null && blob.length > 0) { |
| favorite.icon = blob; |
| } |
| } |
| |
| if (isReplaceableHotseatItem(favorite)) { |
| if (intent != null && intent.getComponent() != null) { |
| PackageManager pm = mContext.getPackageManager(); |
| ActivityInfo activity = null;; |
| try { |
| activity = pm.getActivityInfo(intent.getComponent(), 0); |
| } catch (NameNotFoundException e) { |
| Log.e(TAG, "Target not found", e); |
| } |
| if (activity == null) { |
| return favorite; |
| } |
| for (int i = 0; i < mItemTypeMatchers.length; i++) { |
| if (mItemTypeMatchers[i] == null) { |
| mItemTypeMatchers[i] = new ItemTypeMatcher( |
| CommonAppTypeParser.getResourceForItemType(i)); |
| } |
| if (mItemTypeMatchers[i].matches(activity, pm)) { |
| favorite.targetType = i; |
| break; |
| } |
| } |
| } |
| } |
| |
| return favorite; |
| } |
| |
| /** Deserialize a Favorite from persistence, after verifying checksum wrapper. */ |
| private ContentValues unpackFavorite(byte[] buffer, int dataSize) |
| throws IOException { |
| Favorite favorite = unpackProto(new Favorite(), buffer, dataSize); |
| |
| // If it is a hotseat item, move it accordingly. |
| if (favorite.container == Favorites.CONTAINER_HOTSEAT) { |
| favorite.screen += mHotseatShift; |
| } |
| |
| ContentValues values = new ContentValues(); |
| values.put(Favorites._ID, favorite.id); |
| values.put(Favorites.SCREEN, favorite.screen); |
| values.put(Favorites.CONTAINER, favorite.container); |
| values.put(Favorites.CELLX, favorite.cellX); |
| values.put(Favorites.CELLY, favorite.cellY); |
| values.put(Favorites.SPANX, favorite.spanX); |
| values.put(Favorites.SPANY, favorite.spanY); |
| values.put(Favorites.RANK, favorite.rank); |
| |
| if (favorite.itemType == Favorites.ITEM_TYPE_SHORTCUT) { |
| values.put(Favorites.ICON_TYPE, favorite.iconType); |
| if (favorite.iconType == Favorites.ICON_TYPE_RESOURCE) { |
| values.put(Favorites.ICON_PACKAGE, favorite.iconPackage); |
| values.put(Favorites.ICON_RESOURCE, favorite.iconResource); |
| } |
| values.put(Favorites.ICON, favorite.icon); |
| } |
| |
| if (!TextUtils.isEmpty(favorite.title)) { |
| values.put(Favorites.TITLE, favorite.title); |
| } else { |
| values.put(Favorites.TITLE, ""); |
| } |
| if (!TextUtils.isEmpty(favorite.intent)) { |
| values.put(Favorites.INTENT, favorite.intent); |
| } |
| values.put(Favorites.ITEM_TYPE, favorite.itemType); |
| |
| UserHandleCompat myUserHandle = UserHandleCompat.myUserHandle(); |
| long userSerialNumber = |
| UserManagerCompat.getInstance(mContext).getSerialNumberForUser(myUserHandle); |
| values.put(LauncherSettings.Favorites.PROFILE_ID, userSerialNumber); |
| |
| // If we will attempt grid resize, use the original profile to validate grid size, as |
| // anything which fits in the original grid should fit in the current grid after |
| // grid migration. |
| DeviceProfieData currentProfile = migrationCompatibleProfileData == null |
| ? mDeviceProfileData : migrationCompatibleProfileData; |
| |
| if (favorite.itemType == Favorites.ITEM_TYPE_APPWIDGET) { |
| if (!TextUtils.isEmpty(favorite.appWidgetProvider)) { |
| values.put(Favorites.APPWIDGET_PROVIDER, favorite.appWidgetProvider); |
| } |
| values.put(Favorites.APPWIDGET_ID, favorite.appWidgetId); |
| values.put(LauncherSettings.Favorites.RESTORED, |
| LauncherAppWidgetInfo.FLAG_ID_NOT_VALID | |
| LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY | |
| LauncherAppWidgetInfo.FLAG_UI_NOT_READY); |
| |
| // Verify placement |
| if (((favorite.cellX + favorite.spanX) > currentProfile.desktopCols) |
| || ((favorite.cellY + favorite.spanY) > currentProfile.desktopRows)) { |
| restoreSuccessful = false; |
| throw new InvalidBackupException("Widget not in screen bounds, aborting restore"); |
| } |
| } else { |
| // Check if it is an hotseat item, that can be replaced. |
| if (isReplaceableHotseatItem(favorite) |
| && favorite.targetType != Favorite.TARGET_NONE |
| && favorite.targetType < CommonAppTypeParser.SUPPORTED_TYPE_COUNT) { |
| Log.e(TAG, "Added item type flag"); |
| values.put(LauncherSettings.Favorites.RESTORED, |
| 1 | CommonAppTypeParser.encodeItemTypeToFlag(favorite.targetType)); |
| } else { |
| // Let LauncherModel know we've been here. |
| values.put(LauncherSettings.Favorites.RESTORED, 1); |
| } |
| |
| // Verify placement |
| if (favorite.container == Favorites.CONTAINER_HOTSEAT) { |
| if ((favorite.screen >= currentProfile.hotseatCount) |
| || (favorite.screen == currentProfile.allappsRank)) { |
| restoreSuccessful = false; |
| throw new InvalidBackupException("Item not in hotseat bounds, aborting restore"); |
| } |
| } else { |
| if ((favorite.cellX >= currentProfile.desktopCols) |
| || (favorite.cellY >= currentProfile.desktopRows)) { |
| restoreSuccessful = false; |
| throw new InvalidBackupException("Item not in desktop bounds, aborting restore"); |
| } |
| } |
| } |
| |
| return values; |
| } |
| |
| /** Serialize a Screen for persistence, including a checksum wrapper. */ |
| private Screen packScreen(Cursor c) { |
| Screen screen = new Screen(); |
| screen.id = c.getLong(ID_INDEX); |
| screen.rank = c.getInt(SCREEN_RANK_INDEX); |
| return screen; |
| } |
| |
| /** Deserialize a Screen from persistence, after verifying checksum wrapper. */ |
| private ContentValues unpackScreen(byte[] buffer, int dataSize) |
| throws InvalidProtocolBufferNanoException { |
| Screen screen = unpackProto(new Screen(), buffer, dataSize); |
| ContentValues values = new ContentValues(); |
| values.put(WorkspaceScreens._ID, screen.id); |
| values.put(WorkspaceScreens.SCREEN_RANK, screen.rank); |
| return values; |
| } |
| |
| /** Serialize an icon Resource for persistence, including a checksum wrapper. */ |
| private Resource packIcon(int dpi, Bitmap icon) { |
| Resource res = new Resource(); |
| res.dpi = dpi; |
| res.data = Utilities.flattenBitmap(icon); |
| return res; |
| } |
| |
| /** Serialize a widget for persistence, including a checksum wrapper. */ |
| private Widget packWidget(int dpi, LauncherAppWidgetProviderInfo info) { |
| Widget widget = new Widget(); |
| widget.provider = info.provider.flattenToShortString(); |
| widget.label = info.label; |
| widget.configure = info.configure != null; |
| if (info.icon != 0) { |
| widget.icon = new Resource(); |
| Drawable fullResIcon = mIconCache.getFullResIcon(info.provider.getPackageName(), info.icon); |
| Bitmap icon = Utilities.createIconBitmap(fullResIcon, mContext); |
| widget.icon.data = Utilities.flattenBitmap(icon); |
| widget.icon.dpi = dpi; |
| } |
| |
| Point spans = info.getMinSpans(mIdp, mContext); |
| widget.minSpanX = spans.x; |
| widget.minSpanY = spans.y; |
| return widget; |
| } |
| |
| /** |
| * Deserialize a proto after verifying checksum wrapper. |
| */ |
| private <T extends MessageNano> T unpackProto(T proto, byte[] buffer, int dataSize) |
| throws InvalidProtocolBufferNanoException { |
| MessageNano.mergeFrom(proto, readCheckedBytes(buffer, dataSize)); |
| if (DEBUG) Log.d(TAG, "unpacked proto " + proto); |
| return proto; |
| } |
| |
| /** |
| * Read the old journal from the input file. |
| * |
| * In the event of any error, just pretend we didn't have a journal, |
| * in that case, do a full backup. |
| * |
| * @param oldState the read-0only file descriptor pointing to the old journal |
| * @return a Journal protocol buffer |
| */ |
| private Journal readJournal(ParcelFileDescriptor oldState) { |
| Journal journal = new Journal(); |
| if (oldState == null) { |
| return journal; |
| } |
| FileInputStream inStream = new FileInputStream(oldState.getFileDescriptor()); |
| try { |
| int availableBytes = inStream.available(); |
| if (DEBUG) Log.d(TAG, "available " + availableBytes); |
| if (availableBytes < MAX_JOURNAL_SIZE) { |
| byte[] buffer = new byte[availableBytes]; |
| int bytesRead = 0; |
| boolean valid = false; |
| InvalidProtocolBufferNanoException lastProtoException = null; |
| while (availableBytes > 0) { |
| try { |
| // OMG what are you doing? This is crazy inefficient! |
| // If we read a byte that is not ours, we will cause trouble: b/12491813 |
| // However, we don't know how many bytes to expect (oops). |
| // So we have to step through *slowly*, watching for the end. |
| int result = inStream.read(buffer, bytesRead, 1); |
| if (result > 0) { |
| availableBytes -= result; |
| bytesRead += result; |
| } else { |
| Log.w(TAG, "unexpected end of file while reading journal."); |
| // stop reading and see what there is to parse |
| availableBytes = 0; |
| } |
| } catch (IOException e) { |
| buffer = null; |
| availableBytes = 0; |
| } |
| |
| // check the buffer to see if we have a valid journal |
| try { |
| MessageNano.mergeFrom(journal, readCheckedBytes(buffer, bytesRead)); |
| // if we are here, then we have read a valid, checksum-verified journal |
| valid = true; |
| availableBytes = 0; |
| if (VERBOSE) Log.v(TAG, "read " + bytesRead + " bytes of journal"); |
| } catch (InvalidProtocolBufferNanoException e) { |
| // if we don't have the whole journal yet, mergeFrom will throw. keep going. |
| lastProtoException = e; |
| journal.clear(); |
| } |
| } |
| if (DEBUG) Log.d(TAG, "journal bytes read: " + bytesRead); |
| if (!valid) { |
| Log.w(TAG, "could not find a valid journal", lastProtoException); |
| } |
| } |
| } catch (IOException e) { |
| Log.w(TAG, "failed to close the journal", e); |
| } finally { |
| try { |
| inStream.close(); |
| } catch (IOException e) { |
| Log.w(TAG, "failed to close the journal", e); |
| } |
| } |
| return journal; |
| } |
| |
| private void writeRowToBackup(Key key, MessageNano proto, BackupDataOutput data) |
| throws IOException { |
| writeRowToBackup(keyToBackupKey(key), proto, data); |
| } |
| |
| private void writeRowToBackup(String backupKey, MessageNano proto, |
| BackupDataOutput data) throws IOException { |
| byte[] blob = writeCheckedBytes(proto); |
| data.writeEntityHeader(backupKey, blob.length); |
| data.writeEntityData(blob, blob.length); |
| mBackupDataWasUpdated = true; |
| if (VERBOSE) Log.v(TAG, "Writing New entry " + backupKey); |
| } |
| |
| /** |
| * Write the new journal to the output file. |
| * |
| * In the event of any error, just pretend we didn't have a journal, |
| * in that case, do a full backup. |
| |
| * @param newState the write-only file descriptor pointing to the new journal |
| * @param journal a Journal protocol buffer |
| */ |
| private void writeJournal(ParcelFileDescriptor newState, Journal journal) { |
| try { |
| FileOutputStream outStream = new FileOutputStream(newState.getFileDescriptor()); |
| final byte[] journalBytes = writeCheckedBytes(journal); |
| outStream.write(journalBytes); |
| outStream.close(); |
| if (VERBOSE) Log.v(TAG, "wrote " + journalBytes.length + " bytes of journal"); |
| } catch (IOException e) { |
| Log.w(TAG, "failed to write backup journal", e); |
| } |
| } |
| |
| /** Wrap a proto in a CheckedMessage and compute the checksum. */ |
| private byte[] writeCheckedBytes(MessageNano proto) { |
| CheckedMessage wrapper = new CheckedMessage(); |
| wrapper.payload = MessageNano.toByteArray(proto); |
| CRC32 checksum = new CRC32(); |
| checksum.update(wrapper.payload); |
| wrapper.checksum = checksum.getValue(); |
| return MessageNano.toByteArray(wrapper); |
| } |
| |
| /** Unwrap a proto message from a CheckedMessage, verifying the checksum. */ |
| private static byte[] readCheckedBytes(byte[] buffer, int dataSize) |
| throws InvalidProtocolBufferNanoException { |
| CheckedMessage wrapper = new CheckedMessage(); |
| MessageNano.mergeFrom(wrapper, buffer, 0, dataSize); |
| CRC32 checksum = new CRC32(); |
| checksum.update(wrapper.payload); |
| if (wrapper.checksum != checksum.getValue()) { |
| throw new InvalidProtocolBufferNanoException("checksum does not match"); |
| } |
| return wrapper.payload; |
| } |
| |
| /** |
| * @return true if the launcher is in a state to support backup |
| */ |
| private boolean launcherIsReady() { |
| ContentResolver cr = mContext.getContentResolver(); |
| Cursor cursor = cr.query(Favorites.CONTENT_URI, FAVORITE_PROJECTION, null, null, null); |
| if (cursor == null) { |
| // launcher data has been wiped, do nothing |
| return false; |
| } |
| cursor.close(); |
| |
| if (LauncherAppState.getInstanceNoCreate() == null) { |
| // launcher services are unavailable, try again later |
| return false; |
| } |
| |
| return true; |
| } |
| |
| private String getUserSelectionArg() { |
| return Favorites.PROFILE_ID + '=' + UserManagerCompat.getInstance(mContext) |
| .getSerialNumberForUser(UserHandleCompat.myUserHandle()); |
| } |
| |
| @Thunk class InvalidBackupException extends IOException { |
| |
| private static final long serialVersionUID = 8931456637211665082L; |
| |
| @Thunk InvalidBackupException(Throwable cause) { |
| super(cause); |
| } |
| |
| @Thunk InvalidBackupException(String reason) { |
| super(reason); |
| } |
| } |
| |
| public boolean shouldAttemptWorkspaceMigration() { |
| return migrationCompatibleProfileData != null; |
| } |
| |
| /** |
| * A class to check if an activity can handle one of the intents from a list of |
| * predefined intents. |
| */ |
| private class ItemTypeMatcher { |
| |
| private final ArrayList<Intent> mIntents; |
| |
| ItemTypeMatcher(int xml_res) { |
| mIntents = xml_res == 0 ? new ArrayList<Intent>() : parseIntents(xml_res); |
| } |
| |
| private ArrayList<Intent> parseIntents(int xml_res) { |
| ArrayList<Intent> intents = new ArrayList<Intent>(); |
| XmlResourceParser parser = mContext.getResources().getXml(xml_res); |
| try { |
| DefaultLayoutParser.beginDocument(parser, DefaultLayoutParser.TAG_RESOLVE); |
| final int depth = parser.getDepth(); |
| int type; |
| while (((type = parser.next()) != XmlPullParser.END_TAG || |
| parser.getDepth() > depth) && type != XmlPullParser.END_DOCUMENT) { |
| if (type != XmlPullParser.START_TAG) { |
| continue; |
| } else if (DefaultLayoutParser.TAG_FAVORITE.equals(parser.getName())) { |
| final String uri = DefaultLayoutParser.getAttributeValue( |
| parser, DefaultLayoutParser.ATTR_URI); |
| intents.add(Intent.parseUri(uri, 0)); |
| } |
| } |
| } catch (URISyntaxException | XmlPullParserException | IOException e) { |
| Log.e(TAG, "Unable to parse " + xml_res, e); |
| } finally { |
| parser.close(); |
| } |
| return intents; |
| } |
| |
| public boolean matches(ActivityInfo activity, PackageManager pm) { |
| for (Intent intent : mIntents) { |
| intent.setPackage(activity.packageName); |
| ResolveInfo info = pm.resolveActivity(intent, 0); |
| if (info != null && (info.activityInfo.name.equals(activity.name) |
| || info.activityInfo.name.equals(activity.targetActivity))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |
| } |
