| /* |
| * Copyright (C) 2009 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.backup; |
| |
| import android.content.Context; |
| import android.os.ParcelFileDescriptor; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.FileDescriptor; |
| |
| /** @hide */ |
| public class SharedPreferencesBackupHelper extends FileBackupHelperBase implements BackupHelper { |
| private static final String TAG = "SharedPreferencesBackupHelper"; |
| private static final boolean DEBUG = false; |
| |
| private Context mContext; |
| private String[] mPrefGroups; |
| |
| public SharedPreferencesBackupHelper(Context context, String... prefGroups) { |
| super(context); |
| |
| mContext = context; |
| mPrefGroups = prefGroups; |
| } |
| |
| public void performBackup(ParcelFileDescriptor oldState, BackupDataOutput data, |
| ParcelFileDescriptor newState) { |
| Context context = mContext; |
| |
| // make filenames for the prefGroups |
| String[] prefGroups = mPrefGroups; |
| final int N = prefGroups.length; |
| String[] files = new String[N]; |
| for (int i=0; i<N; i++) { |
| files[i] = context.getSharedPrefsFile(prefGroups[i]).getAbsolutePath(); |
| } |
| |
| // go |
| performBackup_checked(oldState, data, newState, files, prefGroups); |
| } |
| |
| public void restoreEntity(BackupDataInputStream data) { |
| Context context = mContext; |
| |
| String key = data.getKey(); |
| if (DEBUG) Log.d(TAG, "got entity '" + key + "' size=" + data.size()); |
| |
| if (isKeyInList(key, mPrefGroups)) { |
| File f = context.getSharedPrefsFile(key).getAbsoluteFile(); |
| writeFile(f, data); |
| } |
| } |
| } |
| |