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?

stackoverflow.com/questions/3687315/deleting-shared-preferences — Raghunandan
– Raghunandan, Commented Aug 21, 2013 at 4:17
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
– Cote Mounyo, Commented Aug 21, 2013 at 4:22
What's the problem with subsequently clearing every preference file, i.e. in a loop? — MH.
– MH., Commented Aug 21, 2013 at 4:38

kalyan pvs · Accepted Answer · 2013-08-21 05:13:17Z

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, 2013 at 5:13

kalyan pvs

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3 Comments

Yoraco Gonzales Over a year ago

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/"

Jemshit Over a year ago

@YoracoGonzales context.getFilesDir().getPath() gives me /data/user/0/{applicationId}/files which is not equal to /data/data/

Jemshit Over a year ago

context.filesDir.parentFile.absolutePath + File.separator + "shared_prefs" did work. But who knows maybe it will not work on Samsung ¯_(ツ)_/¯

Exceptional · Accepted Answer · 2013-08-21 04:40:06Z

11

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

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

answered Aug 21, 2013 at 4:40

Exceptional

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1 Comment

Félix Maroy Over a year ago

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();

WrightsCS · Accepted Answer · 2019-11-11 19:53:17Z

3

Use the code below to delete a preference key:

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

edited Nov 11, 2019 at 19:53

WrightsCS

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answered Aug 21, 2013 at 5:10

Dhaval Patel

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Comments

Dharman · Accepted Answer · 2020-03-09 12:21:09Z

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 9, 2020 at 12:21

Dharman♦

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answered Aug 21, 2013 at 4:35

Pratik Butani

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2 Comments

Sharon Joshi Over a year ago

what is A_PREFS_FILE

Pratik Butani Over a year ago

The question asked for A_PREFS_FILE so, You can write your preference name.

Khalid LACHHAB · Accepted Answer · 2020-05-31 15:28:03Z

1

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();
}

answered May 31, 2020 at 15:28

Khalid LACHHAB

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Comments

Dankyi Anno Kwaku · Accepted Answer · 2021-11-21 10:39:51Z

1

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());

answered Nov 21, 2021 at 10:39

Dankyi Anno Kwaku

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Comments

Piotr Zawadzki · Accepted Answer · 2022-06-06 07:26:32Z

1

You can clear all Shared Preferences with e.g.

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

answered Jun 6, 2022 at 7:26

Piotr Zawadzki

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Comments

kwishnu · Accepted Answer · 2013-08-21 04:27:23Z

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, 2013 at 4:27

kwishnu

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