Android M weird shared preferences issue

android sharedpreferences android-6.0-marshmallow
nios picture nios · Aug 14, 2015 · Viewed 12k times · Source

On my Nexus 5 running Android M Developer Preview 2, when uninstalling/reinstalling an app, the device is retrieving shared preferences I stored long ago, for instance a boolean isFirstLaunch.

The only way to clear these is to do it manually from the device settings.

Is there any change in shared preferences behavior on Android M? I can't find any documentation regarding this.

Or maybe the Android M Preview 2 ROM has a bug...

Answer

Knossos picture Knossos · Aug 14, 2015

That is because Android M will feature Automatic Backups (old link).

Extract:

The automatic backup feature preserves the data your app creates on a user device by uploading it to the user’s Google Drive account and encrypting it. There is no charge to you or the user for data storage and the saved data does not count towards the user's personal Drive quota. During the M Preview period, users can store up to 25MB per Android app.

Related questions

How to use SharedPreferences in Android to store, fetch and edit values

I want to store a time value and need to retrieve and edit it. How can I use SharedPreferences to do this?

Read More
Android Shared preferences for creating one time activity (example)

I have three activities A,B and C where A and B are forms and after filling and saving the form data in database(SQLITE). I am using intent from A to B and then B to C.What i …

Read More
How to delete shared preferences data from App in Android

How do I delete SharedPreferences data for my application? I'm creating an application that uses a lot of web services to sync data. For testing purposes, I need to wipe out some SharedPreferences values when I restart the app.

Read More