SharedPreferences not being removed on user uninstalling application

Question

Has anyone encountered this issue on a Nexus 6P device? I am only getting this issue on a Nexus 6P (running Google Fi).

When I install the app there is a key for userIsLoggedIn inside SharedPreferences.

This block:

boolean userIsLoggedIn  = SharedPrefs.userIsLoggedIn(this);  // Then in another class...   public static boolean userIsLoggedIn(Context context) {     // For users updating apps, if the previous key-value is a string, convert it to boolean     try {         return context.getSharedPreferences(LOGIN_FILE, Context.MODE_PRIVATE)                 .getBoolean(USER_LOGGED_IN, false);     } catch (ClassCastException e) {         Logger.e(TAG, e.getMessage());         context.getSharedPreferences(LOGIN, Context.MODE_PRIVATE)                 .edit()                 .putBoolean(USER_LOGGED_IN, false)                 .commit();         return context.getSharedPreferences(LOGIN, Context.MODE_PRIVATE)                 .getBoolean(USER_LOGGED_IN, false);     } } 

Now this should return false on a new uninstall but debugging this on a fresh install I get the following on App Startup.

I also running Proguard if that matters, when running the device on a non-proguard enabled APK it runs ok. Running proguard on any other devices runs fine.

Answer 1

Since Nexus 6P is running Android M, I think Automatic Backups is the issue.

I think You can use allowBackup to stop that.

Check this answer: https://stackoverflow.com/a/32010582/336312