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/*
* 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.BackupAgentHelper;
import android.app.backup.BackupDataInput;
import android.app.backup.BackupManager;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.os.ParcelFileDescriptor;
import android.util.Log;
import com.android.launcher3.model.GridSizeMigrationTask;
import java.io.IOException;
public class LauncherBackupAgentHelper extends BackupAgentHelper {
private static final String TAG = "LauncherBAHelper";
private static final String KEY_LAST_NOTIFIED_TIME = "backup_manager_last_notified";
private static final String LAUNCHER_DATA_PREFIX = "L";
static final boolean VERBOSE = false;
static final boolean DEBUG = false;
/**
* Notify the backup manager that out database is dirty.
*
* <P>This does not force an immediate backup.
*
* @param context application context
*/
public static void dataChanged(Context context) {
dataChanged(context, 0);
}
/**
* Notify the backup manager that out database is dirty.
*
* <P>This does not force an immediate backup.
*
* @param context application context
* @param throttleMs duration in ms for which two consecutive calls to backup manager should
* not be made.
*/
public static void dataChanged(Context context, long throttleMs) {
SharedPreferences prefs = Utilities.getPrefs(context);
long now = System.currentTimeMillis();
long lastTime = prefs.getLong(KEY_LAST_NOTIFIED_TIME, 0);
// User can manually change the system time, which could lead to now < lastTime.
// Re-backup in that case, as the backup will have a wrong lastModifiedTime.
if (now < lastTime || now >= (lastTime + throttleMs)) {
BackupManager.dataChanged(context.getPackageName());
prefs.edit().putLong(KEY_LAST_NOTIFIED_TIME, now).apply();
}
}
private LauncherBackupHelper mHelper;
@Override
public void onCreate() {
super.onCreate();
mHelper = new LauncherBackupHelper(this);
addHelper(LAUNCHER_DATA_PREFIX, mHelper);
}
@Override
public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState)
throws IOException {
if (!Utilities.ATLEAST_LOLLIPOP) {
// No restore for old devices.
Log.i(TAG, "You shall not pass!!!");
Log.d(TAG, "Restore is only supported on devices running Lollipop and above.");
return;
}
// Clear dB before restore
LauncherSettings.Settings.call(getContentResolver(),
LauncherSettings.Settings.METHOD_CREATE_EMPTY_DB);
boolean hasData;
try {
super.onRestore(data, appVersionCode, newState);
// If no favorite was migrated, clear the data and start fresh.
final Cursor c = getContentResolver().query(
LauncherSettings.Favorites.CONTENT_URI, null, null, null, null);
hasData = c.moveToNext();
c.close();
} catch (Exception e) {
// If the restore fails, we should do a fresh start.
Log.e(TAG, "Restore failed", e);
hasData = false;
}
if (hasData && mHelper.restoreSuccessful) {
LauncherSettings.Settings.call(getContentResolver(),
LauncherSettings.Settings.METHOD_CLEAR_EMPTY_DB_FLAG);
LauncherClings.markFirstRunClingDismissed(this);
// Rank was added in v4.
if (mHelper.restoredBackupVersion <= 3) {
LauncherSettings.Settings.call(getContentResolver(),
LauncherSettings.Settings.METHOD_UPDATE_FOLDER_ITEMS_RANK);
}
if (GridSizeMigrationTask.ENABLED && mHelper.shouldAttemptWorkspaceMigration()) {
GridSizeMigrationTask.markForMigration(getApplicationContext(),
mHelper.widgetSizes, mHelper.migrationCompatibleProfileData);
}
LauncherSettings.Settings.call(getContentResolver(),
LauncherSettings.Settings.METHOD_CONVERT_SHORTCUTS_TO_ACTIVITIES);
} else {
if (VERBOSE) Log.v(TAG, "Nothing was restored, clearing DB");
LauncherSettings.Settings.call(getContentResolver(),
LauncherSettings.Settings.METHOD_CREATE_EMPTY_DB);
}
}
}
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