SharedPreferences dont get clear after app uninstallation of app in Samsung S9

Question

I am developing an app where I am keeping boolean flag in SharedPreferences to check if current session is active or not. Based on this flag user gets navigated to either Home screen or Login screen after Splash screen is being shown.

This is working fine but one of our client has reported that his app keeps his user logged in even after uninstallation and re-installation of his app.

Steps he followed

Install app
Login using valid credentials
Uninstall app from settings
Re-install app using apk given by me
Open app

I think when we uninstall app, its data gets cleared (including shared preferences), and this is working fine one other devices like Pixel 2, OnePlus 3 which are having same Android OS 8.0.

This is how I handled navigation. Here SessionManager is singleton (object in Kotlin) which stores isSessionActive flag. isSessionActive flag gets its value from SharedPreferences when application starts

val intent: Intent = if (SessionManager.isSessionActive) {
      Intent(this, MainActivity::class.java)
} else {
      Intent(this, LoginActivity::class.java)
}
startActivity(intent)

Can you suggest possible root cause of this behaviour and solution for this?

Possible duplicate of [SharedPreferences are not being cleared when I uninstall](https://stackoverflow.com/questions/35517239/sharedpreferences-are-not-being-cleared-when-i-uninstall) — AskNilesh, Mar 28 '18 at 06:37
[**`android:allowBackup=false`**](https://developer.android.com/guide/topics/manifest/application-element.html#allowbackup) — AskNilesh, Mar 28 '18 at 06:38
@NileshRathod I made changes as per your suggestion. Let me check with my client once then i will let you know if this solution is working for me or not — silwar, Mar 29 '18 at 06:59

score 2 · Accepted Answer · answered Mar 28 '18 at 23:57

2

Probably due to the android:allowBackup=false

Check SharedPreferences are not being cleared when I uninstall

answered Mar 28 '18 at 23:57

neteinstein

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score 0 · Answer 2 · answered Mar 28 '18 at 09:31

To clear your app data.Add the following

         try {  // clearing app data
        Runtime runtime = Runtime.getRuntime();
        runtime.exec("pm clear your package name");
       //e.g "pm com.example.test"
    } catch (Exception e) {
        e.printStackTrace();
    }

SharedPreferences dont get clear after app uninstallation of app in Samsung S9

2 Answers2