delete all sharedPreferences for my app when user signs out

Question

I have an android app with a number of activities, and a number of specific preference files that are created. When a user sign out of my app, I want to delete absolutely all shared preferences. Understand that I cannot use context.getSharedPreferences("A_PREFS_FILE", 0).edit().clear().commit() as that would only clear one specific file. I want to clear all the preference files associated with my app. Is there a way to do that?

http://stackoverflow.com/questions/3687315/deleting-shared-preferences — Raghunandan, Aug 21 '13 at 04:17
`clear()` is a non-static method, and therefore `SharedPreferences.Editor.clear()` would not work. All the other examples there are doing exactly what I specifically said I don't want to do. Also, following would be a null pointer: `Editor defaultPrefsPut; defaultPrefsPut.clear(); defaultPrefsPut.commit();` — Cote Mounyo, Aug 21 '13 at 04:22
What's the problem with subsequently clearing every preference file, i.e. in a loop? — MH., Aug 21 '13 at 04:38

score 23 · Answer 1 · answered Aug 21 '13 at 05:13

23

By this way you can delete all the files at ones.. by clear() it will erase the data file still exist..

File sharedPreferenceFile = new File("/data/data/"+ getPackageName()+ "/shared_prefs/");
    File[] listFiles = sharedPreferenceFile.listFiles();
    for (File file : listFiles) {
        file.delete();
    }

Here it will returns the all the list of files then you can easily delete..

answered Aug 21 '13 at 05:13

kalyan pvs

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6

This is definitivly the right way to delete all shared preferences files. But consider to use `context.getFilesDir().getPath()` instead of hard coding the path `"/data/data/"` – Yoraco Gonzales Jan 07 '17 at 09:36
@YoracoGonzales `context.getFilesDir().getPath()` gives me `/data/user/0/{applicationId}/files` which is not equal to `/data/data/` – Jemshit Dec 12 '18 at 09:10
3

`context.filesDir.parentFile.absolutePath + File.separator + "shared_prefs"` did work. But who knows maybe it will not work on Samsung ¯\_(ツ)_/¯ – Jemshit Dec 12 '18 at 09:25

score 11 · Answer 2 · answered Aug 21 '13 at 04:40

11

Simply put the following code, It works perfect for me.....

getApplicationContext().getSharedPreferences("CREDENTIALS", 0).edit().clear().commit();

answered Aug 21 '13 at 04:40

Exceptional

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Consider using apply() instead; commit writes its data to persistent storage immediately, whereas apply will handle it in the background. ```getApplicationContext().getSharedPreferences("PREF_NAME", 0).edit().clear().apply();``` – Félix Maroy Dec 02 '20 at 06:50

score 3 · Answer 3 · edited Mar 09 '20 at 12:21

3

First you have to clear then next call commit Try it:

SharedPreference.Editor pref = context.getSharedPreferences("A_PREFS_FILE", 0).edit();
pref.clear();
pref.commit();

edited Mar 09 '20 at 12:21

Dharman

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answered Aug 21 '13 at 04:35

Pratik Butani

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what is A_PREFS_FILE – Sharon Joshi Sep 16 '19 at 15:24
The question asked for `A_PREFS_FILE` so, You can write your preference name. – Pratik Butani Sep 17 '19 at 04:51

score 3 · Answer 4 · edited Nov 11 '19 at 19:53

3

Use the code below to delete a preference key:

prefs.edit().remove("YOURTAG1").commit();
prefs.edit().remove("YOURTAG2").commit();

edited Nov 11 '19 at 19:53

WrightsCS

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answered Aug 21 '13 at 05:10

Dhaval Patel

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score 1 · Answer 5 · answered May 31 '20 at 15:28

SharedPreferences directory path : Environment.getDataDirectory() + "/data/" + ActivateAccountActivity.this.getPackageName() + "/shared_prefs"

Use "for" loop to delete all the files, like so :

File sprefs_directory = new File(Environment.getDataDirectory() + "/data/" + context.getPackageName() + "/shared_prefs");
File[] files = filesirectory.listFiles();
for(File file : files) {
  file.delete();
}

score 1 · Answer 6 · answered Nov 21 '21 at 10:39

This works

public static void deleteAllDataInSharedPreference(Context context){
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
    SharedPreferences.Editor editor = preferences.edit();
    editor.clear();
    editor.commit();
    context = null;
}

deleteAllDataInSharedPreference(getApplicationContext());

score 0 · Answer 7 · answered Aug 21 '13 at 04:27

0

Why not have a SharedPreference that keeps track of all associated files; then, in onPause or onStop, parse that value to SharedPreferences.Editor.clear().commit() each of them...then delete that last one?

answered Aug 21 '13 at 04:27

kwishnu

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score 0 · Answer 8 · answered Jun 06 '22 at 07:26

0

You can clear all Shared Preferences with e.g.

val sharedPreferenceFile = File("${application.dataDir.path}/shared_prefs/")
sharedPreferenceFile.listFiles()?.forEach(File::delete)

answered Jun 06 '22 at 07:26

Piotr Zawadzki

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delete all sharedPreferences for my app when user signs out

8 Answers8