backup manager for android
a backup program for android. requires root and allows you to backup individual apps and their data.
both backup and restore of individual programs one at a time and batch backup and restore of multiple programs are supported (with silent / unattended restores).
restoring system apps should be possible without requiring a reboot afterwards. oandbackup is also able to uninstall system apps. handling system apps in this way depends on whether /system/ can be remounted as writeable though, so this will probably not work for all devices (e.g. htc devices with the security flag on).
backups can be scheduled with no limit on the number of individual schedules and there is the possibility of creating custom lists from the list of installed apps.
oandbackup is built with gradle. you need the android sdk, rust for building the oab-utils binary, and bash or a compatible shell for executing the oab-utils build script (patches for making this buildable on windows are welcomed). ``` ./gradlew build
./gradlew assembleArm64 ```
oandbackup is handled on both gitlab and github:
debug apks are built by gitlab for each commit on every branch. the latest successful build can be found here (substitute $branch for the desired branch, e.g. master):
and signed release apks are built for every commit on the master branch:
a working busybox or toybox installation is required at the moment, but work is in progress to include all the needed functionality in a binary included in the apk. this program is called oab-utils and is written in rust.
you can get the source for busybox here: https://busybox.net/. you then need to cross-compile it for the architecture of your device (e.g. armv6). you can also try the binaries found here: https://busybox.net/downloads/binaries/.
if you have a working toolchain for your target device, you should only need to run the following commands on the busybox source:
make defconfig # makes a config file with the default options make menuconfig # brings up an ncurses-based menu for editing the options # set the prefix for your toolchain under busybox settings -> build options # (remember the trailing dash, e.g. 'arm-unknown-linux-gnueabihf-') # build as a static binary if needed makecopy the busybox binary to your system, for example /system/xbin or /data/local, and make it executable. symlinking is not necessary for use with oandbackup. in the oandbackup preferences, provide the whole path to the busybox binary, including the binary's file name (e.g. /data/local/busybox).
an apk build of oandbackup is available on f-droid's servers: https://f-droid.org/repository/browse/?fdid=dk.jens.backup
translations are currently being managed on transifex: https://www.transifex.com/projects/p/oandbackup/ so please come help us there or spread the link if you want the app available in your own language.
if you have any questions, critique, bug reports or suggestions, please write me an email: [email protected]
oandbackup supports encrypting the backups using an external cryptography provider. First you need to install an app which implements the openpgp-api, e.g. OpenKeychain: https://www.openkeychain.org/, and set up an identity. The "Cryptography" section of the preferences of oandbackup is then enabled and here you can choose which openpgp and identity to use.
pmto enable or disable an app. disabling an app removes it from the normal user interface without uninstalling. this can be used for enabling or disabling an app for muliple users at a time (if the device has multiple users enabled). users are identified with an id: 0 is the first user (owner).
pm install -r $apkgets called and subsequently the app is disabled for every user who has the app listed in /data/system/user/$user/package-restrictions.xml (unless the app is listed as enabled="1").
restoring data can also be done manually from the backup files. oandbackup stores the program data files in zip-compressed archives so they can be uncompressed and unpacked with any tool supporting that format (e.g.
unzip dk.jens.backup.zip). the unpacked files should then be placed in the directory indicated by "dataDir" in the log file stored with the backup files. this directory will usually be in /data/data/.
stat /data/data/dk.jens.backup) and set with
chown. finally, the correct permissions need to be set with
chmod. oandbackup does this by setting 771 for all data files although this is probably not the best method. the subdirectory lib/ needs to be excluded from both
restoreconcommand on the data directory (e.g.
restorecon -R /data/data/dk.jens.backup) or use another method of restoring the file security contexts.
oandbackup is licensed under the MIT license (see LICENSE.txt)
android-support-v4 is written by The Android Open Source Project and licensed under the Apache License, Version 2.0 (see NOTICE.txt in the libs directory)
openpgp-api-lib is written by Dominik Schürmann and licensed under Apache License, Version 2.0