android sharedpreferences does not save data when app restart

Question

I have a sharedpreference which save data fine until the app close. when app restart the data in sharedpreferences was gone please tell me the solution. I want when app close or restart or phone restart my data in preferences was saved.

public static final String MyPREF_MOB = "MyPref_mob";
public static final String WALLPAPER_MOB = "wallpaper_mob";

if(encodedImagee!=null) {
    // shre1 = PreferenceManager.getDefaultSharedPreferences(context);
    SharedPreferences.Editor edit = shre1.edit();
    edit.putString(WALLPAPER_MOB, encodedImagee);
    edit.apply();
    //  Toast.makeText(Profile1Activity.this, "new same image in prefrences", Toast.LENGTH_SHORT).show();
}
shre1 = getSharedPreferences(MyPREF_MOB, Context.MODE_PRIVATE);
final String image_save =shre1.getString(WALLPAPER_MOB, "");

i have also try this

 if(encodedImagee!=null)
        {
           // shre1 = PreferenceManager.getDefaultSharedPreferences(context);
            SharedPreferences.Editor edit = shre1.edit();
            edit.putString("mob_wallpaper", encodedImagee);
            edit.commit();
            //  Toast.makeText(Profile1Activity.this, "new same image in prefrences", Toast.LENGTH_SHORT).show();
        }
        shre1 = PreferenceManager.getDefaultSharedPreferences(context);
        final String image_save =shre1.getString("mob_wallpaper", "");

i have use this code data save when app restart also i can get data but when phone restart data again gone

if(encodedImagee!=null)
        {
           // shre1 = PreferenceManager.getDefaultSharedPreferences(context);
            SharedPreferences.Editor edit = shre1.edit();
            edit.remove("mob_wallpaper");
            edit.apply();
            edit.putString("mob_wallpaper", encodedImagee);
            edit.apply();
            //  Toast.makeText(Profile1Activity.this, "new same image in prefrences", Toast.LENGTH_SHORT).show();
        }
        shre1 = PreferenceManager.getDefaultSharedPreferences(context);
        final String image_save =shre1.getString("mob_wallpaper", "");

please provide more information about when you save data and when you retrieve it again during the aplication's lifecycle.. and how — ColdFire, Jun 24 '16 at 11:42
i have a loop in which i used sharedprefrences to get data and save and retrieve it its work fine but when app close data in sharedprefences gone — faisal iqbal, Jun 24 '16 at 11:45
the code showing where exactly do you do your save/query the data — ColdFire, Jun 24 '16 at 11:58
as per your already posted code your prederence code flow couldn't understand properly — Abhishek Patel, Jun 24 '16 at 11:58
i have update question i have one solution but its not working when phone restart but its work when app restart — faisal iqbal, Jun 24 '16 at 12:33

Pramod Waghmare · Answer 1 · 2016-06-24T18:40:17.407

2

Try this,

        SharedPreferences sharedPreferences = getSharedPreferences("preference_name", Context.MODE_PRIVATE);
        if (encodedImagee != null){
            SharedPreferences.Editor edit = sharedPreferences.edit();
            edit.putString("mob_wallpaper", encodedImagee);
            edit.commit();
        }else{
            final String image_save = sharedPreferences.getString("mob_wallpaper","");
            // put your logic over here
        }

edited Jun 24 '16 at 18:40

answered Jun 24 '16 at 11:49

Pramod Waghmare

1,273
13
21

`SharedPreferences` cleared data only when app data clear and at the time of uninstall. – Pramod Waghmare Jun 24 '16 at 11:52
SharedPreferences shre1; – faisal iqbal Jun 24 '16 at 12:04
object of sharedprefrence how? – faisal iqbal Jun 24 '16 at 12:06
Try updated code. Also post logic for `encodedImagee` – Pramod Waghmare Jun 24 '16 at 13:07

sdabet · Answer 2 · 2016-06-24T11:46:18.173

1

I assume from your sample code that you use

PreferenceManager.getDefaultSharedPreferences for reading
getSharedPreferences(MyPREF_MOB, Context.MODE_PRIVATE) for writing

I think you should use the same in both cases.

Try to replace

shre1 = getSharedPreferences(MyPREF_MOB, Context.MODE_PRIVATE);

by

shre1 = PreferenceManager.getDefaultSharedPreferences(context);

edited Jun 24 '16 at 11:46

answered Jun 24 '16 at 11:44

sdabet

18,360
11
89
158

its working fine save data and retrieve data but when app restart data gone – faisal iqbal Jun 24 '16 at 11:47

score 0 · Answer 3 · answered Jun 24 '16 at 11:43

//get the preference instance with this
SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
// acccess a saved key value
mPrefs.getString("key", "default_value");
//save a key-value
mPrefs.edit().putString("key", "new_value").apply();

score 0 · Answer 4 · answered Jun 24 '16 at 11:51

0

modify your code in this way:

@Override
public void onCreate(.....){
    super.onCreate(......);
setContentView(R.layout.your_layout_xml);
shre1 = getSharedPreferences(MyPREF_MOB, Context.MODE_PRIVATE);

final String image_save =shre1.getString(WALLPAPER_MOB, "");

and when you want to update your image

if(encodedImagee!=null) {
// shre1 = PreferenceManager.getDefaultSharedPreferences(context);
SharedPreferences.Editor edit = shre1.edit();
edit.putString(WALLPAPER_MOB, encodedImagee);
edit.commit(); //make use of commit
//  Toast.makeText(Profile1Activity.this, "new same image in prefrences", Toast.LENGTH_SHORT).show();
}

answered Jun 24 '16 at 11:51

Ashwani

1,294
1
11
24

would you mind updating your question with more detail. i was able to make out only this by the snippet you have provided – Ashwani Jun 24 '16 at 12:29
i have update question i have one solution but its not working when phone restart but its work when app restart – faisal iqbal Jun 24 '16 at 12:32
why you are loading pref again and again? – Ashwani Jun 24 '16 at 12:34
because i want to get current wallpaper looper save current wallpaper again and again – faisal iqbal Jun 24 '16 at 12:36
check this link: http://stackoverflow.com/questions/15353900/shared-preferences-reset-data-when-app-is-force-closed-or-device-is-restarted – Ashwani Jun 24 '16 at 12:54

android sharedpreferences does not save data when app restart

4 Answers4