1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.launcher3; 18 19import android.app.backup.BackupAgentHelper; 20import android.app.backup.BackupDataInput; 21import android.app.backup.BackupManager; 22import android.content.Context; 23import android.database.Cursor; 24import android.os.ParcelFileDescriptor; 25import android.util.Log; 26 27import com.android.launcher3.model.MigrateFromRestoreTask; 28 29import java.io.IOException; 30 31public class LauncherBackupAgentHelper extends BackupAgentHelper { 32 33 private static final String TAG = "LauncherBackupAgentHelper"; 34 35 private static final String LAUNCHER_DATA_PREFIX = "L"; 36 37 static final boolean VERBOSE = false; 38 static final boolean DEBUG = false; 39 40 private static BackupManager sBackupManager; 41 42 /** 43 * Notify the backup manager that out database is dirty. 44 * 45 * <P>This does not force an immediate backup. 46 * 47 * @param context application context 48 */ 49 public static void dataChanged(Context context) { 50 if (sBackupManager == null) { 51 sBackupManager = new BackupManager(context); 52 } 53 sBackupManager.dataChanged(); 54 } 55 56 private LauncherBackupHelper mHelper; 57 58 @Override 59 public void onCreate() { 60 super.onCreate(); 61 mHelper = new LauncherBackupHelper(this); 62 addHelper(LAUNCHER_DATA_PREFIX, mHelper); 63 } 64 65 @Override 66 public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState) 67 throws IOException { 68 if (!Utilities.ATLEAST_LOLLIPOP) { 69 // No restore for old devices. 70 Log.i(TAG, "You shall not pass!!!"); 71 Log.d(TAG, "Restore is only supported on devices running Lollipop and above."); 72 return; 73 } 74 75 // Clear dB before restore 76 LauncherAppState.getLauncherProvider().createEmptyDB(); 77 78 boolean hasData; 79 try { 80 super.onRestore(data, appVersionCode, newState); 81 // If no favorite was migrated, clear the data and start fresh. 82 final Cursor c = getContentResolver().query( 83 LauncherSettings.Favorites.CONTENT_URI, null, null, null, null); 84 hasData = c.moveToNext(); 85 c.close(); 86 } catch (Exception e) { 87 // If the restore fails, we should do a fresh start. 88 Log.e(TAG, "Restore failed", e); 89 hasData = false; 90 } 91 92 if (hasData && mHelper.restoreSuccessful) { 93 LauncherAppState.getLauncherProvider().clearFlagEmptyDbCreated(); 94 LauncherClings.synchonouslyMarkFirstRunClingDismissed(this); 95 96 // Rank was added in v4. 97 if (mHelper.restoredBackupVersion <= 3) { 98 LauncherAppState.getLauncherProvider().updateFolderItemsRank(); 99 } 100 101 if (MigrateFromRestoreTask.ENABLED && mHelper.shouldAttemptWorkspaceMigration()) { 102 MigrateFromRestoreTask.markForMigration(getApplicationContext(), 103 (int) mHelper.migrationCompatibleProfileData.desktopCols, 104 (int) mHelper.migrationCompatibleProfileData.desktopRows, 105 mHelper.widgetSizes); 106 } 107 108 LauncherAppState.getLauncherProvider().convertShortcutsToLauncherActivities(); 109 } else { 110 if (VERBOSE) Log.v(TAG, "Nothing was restored, clearing DB"); 111 LauncherAppState.getLauncherProvider().createEmptyDB(); 112 } 113 } 114} 115