How can one pull the (private) data of one's own Android app?

Question

Attempting to pull a single file using

adb pull /data/data/com.corp.appName/files/myFile.txt myFile.txt

fails with

failed          


        

Answer 1

Does that mean that one could chmod the directory from world:--x to world:r-x long enough to be able to fetch the files?

Yes, exactly. Weirdly enough, you also need the file to have the x bit set. (at least on Android 2.3)

chmod 755 all the way down worked to copy a file (but you should revert permissions afterwards, if you plan to continue using the device).

Answer 2

After setting the right permissions by adding the following code:

File myFile = ...;
myFile.setReadable(true, false); // readable, not only for the owner

adb pull works as desired.

see File.setReadable()

Answer 3

you can do:

adb pull /storage/emulated/0/Android/data//

Answer 4

Similar to Tamas's answer, here is a one-liner for Mac OS X to fetch all of the files for app with your.app.id from your device and save them to (in this case) ~/Desktop/your.app.id:

(
    id=your.app.id &&
    dest=~/Desktop &&
    adb shell "run-as $id cp -r /data/data/$id /sdcard" &&
    adb -d pull "/sdcard/$id" "$dest" &&
    if [ -n "$id" ]; then adb shell "rm -rf /sdcard/$id"; fi
)

• Exclude the -d to pull from emulator
• Doesn't stomp your session variables
• You can paste the whole block into Terminal.app (or remove newlines if desired)

Answer 5

Backed up Game data with apk. Nougat Oneplus 2.

**adb backup "-apk com.nekki.shadowfight" -f "c:\myapk\samsung2.ab"**

Answer 6

On MacOSX, by combining the answers from Calaf and Ollie Ford, the following worked for me.

On the command line (be sure adb is in your path, mine was at ~/Library/Android/sdk/platform-tools/adb) and with your android device plugged in and in USB debugging mode, run:

 adb backup -f backup com.mypackage.myapp

Your android device will ask you for permission to backup your data. Select "BACKUP MY DATA"

Wait a few moments.

The file backup will appear in the directory where you ran adb.

Now run:

dd if=backup bs=1 skip=24 | python -c "import zlib,sys;sys.stdout.write(zlib.decompress(sys.stdin.read()))" > backup.tar

Now you'll you have a backup.tar file you can untar like this:

 tar xvf backup.tar

And see all the files stored by your application.