Android not automatically backing up sharedprefs?

Question

I'm having an issue with the android https://developer.android.com/guide/topics/data/autobackup feature not working. Unity version; 2018.4.3f1 Android; min version: 16, target: 28

I've tried it with the 'android:fullBackupOnly' flag, but it made no difference either.

It won't retain anything in Playerprefs upon uninstall.
It won't retain anything when manually saving it in the native android sharedPreferences and uninstalling.
Builds have been created using the same bundle identifier as used for our store product.
We force our backups by manually triggering the google drive backup on the phone to ensure it attempted to do the backup.
We have multiple manifests which get merged together, but we've looked in our final merged manifest and it is still the same as shown in the example above.
Tested on phones which are above android 6.0 which is the requirement according to the documentation.
Builds got distributed across appcenter. I'm not sure if it needs to be distributed through specific channels before it starts working?

Partial manifest which includes the allowBackup flag;

<application android:allowBackup="true" android:icon="@drawable/app_icon" android:label="@string/app_name" android:largeHeap="true" android:theme="@style/UnityThemeSelector" android:resizeableActivity="false"
android:isGame="true" android:banner="@drawable/app_banner" android:networkSecurityConfig="@xml/network_security_config">
        <!-- Required for "super widescreen" devices -->
        <meta-data android:name="android.max_aspect" android:value="3.0" />
        <activity android:label="@string/app_name" android:name=REDACTED android:screenOrientation="sensorPortrait" android:launchMode="singleTop" android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen" android:clearTaskOnLaunch="false">
            <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
            </intent-filter>
        </activity>
</application>

If anyone has any idea I'd greatly appreciate it, because I'm at a bit of a loss here.

Thanks for the link, but we have to use the current setup, so this wouldn't have been an option. — Michael Duwé, Nov 13 '19 at 11:25

score 1 · Answer 1 · answered Nov 13 '19 at 11:30

So in the end it was a quota issue. For anyone who kind of missed the documentation like I did, here are easy steps to determine what error you're dealing with;

https://developer.android.com/studio/command-line/adb.html

navigate to your android SDK folder.
open a shell/cmd window.
List the packages installed on your device, to get the package which you're expecting to perform an autobackup " .\adb shell pm list packages -f ".
Open LogCat to get the full debug.
Test ADB auto backup .\adb shell bmgr backupnow "PACKAGE_NAME"
Read output in shell/cmd and logcat to determine issue.

Good luck :).

Android not automatically backing up sharedprefs?

1 Answers1