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Android example source code file (FullBackupAgent.java)

This example Android source code file (FullBackupAgent.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, app, application, arraylist, backing, backupdataoutput, debug, file, filebackuphelper, fullbackupagent, io, linkedlist, os, override, parcelfiledescriptor, string, tag, util

The FullBackupAgent.java Android example source code

/*
 * 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.app;

import android.app.backup.BackupAgent;
import android.app.backup.BackupDataInput;
import android.app.backup.BackupDataOutput;
import android.app.backup.FileBackupHelper;
import android.os.ParcelFileDescriptor;
import android.util.Log;

import java.io.File;
import java.util.ArrayList;
import java.util.LinkedList;

/**
 * Backs up an application's entire /data/data/<package>/... file system.  This
 * class is used by the desktop full backup mechanism and is not intended for direct
 * use by applications.
 * 
 * {@hide}
 */

public class FullBackupAgent extends BackupAgent {
    // !!! TODO: turn off debugging
    private static final String TAG = "FullBackupAgent";
    private static final boolean DEBUG = true;

    @Override
    public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
            ParcelFileDescriptor newState) {
        LinkedList<File> dirsToScan = new LinkedList();
        ArrayList<String> allFiles = new ArrayList();

        // build the list of files in the app's /data/data tree
        dirsToScan.add(getFilesDir());
        if (DEBUG) Log.v(TAG, "Backing up dir tree @ " + getFilesDir().getAbsolutePath() + " :");
        while (dirsToScan.size() > 0) {
            File dir = dirsToScan.removeFirst();
            File[] contents = dir.listFiles();
            if (contents != null) {
                for (File f : contents) {
                    if (f.isDirectory()) {
                        dirsToScan.add(f);
                    } else if (f.isFile()) {
                        if (DEBUG) Log.v(TAG, "    " + f.getAbsolutePath());
                        allFiles.add(f.getAbsolutePath());
                    }
                }
            }
        }

        // That's the file set; now back it all up
        FileBackupHelper helper = new FileBackupHelper(this,
                allFiles.toArray(new String[allFiles.size()]));
        helper.performBackup(oldState, data, newState);
    }

    @Override
    public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState) {
    }
}

Other Android examples (source code examples)

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