Why shared preferences has been reset up on app crash or force close Android

Question

I have taken CSIPSIMPLE code and repackaged to com.mycompany.appname

The problem is, whenever app is crashed, All values are deleted from Shared preferences.

Why?

My Application is

public class BeemApplication extends Application {

    static BeemApplication application = null;

    public static SharedPreferences mPref;
    public static Editor mEditor;

    public BeemApplication() {

    }

    public static BeemApplication getInstance() {
        if(application != null) {
            return application;
        } else {
            return new BeemApplication();
        }
    }

    @Override
    public void onCreate() {
        super.onCreate();
        application = this;
        mPref = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
        mEditor = mPref.edit();
    }

    @Override
    public void onTerminate() {
        super.onTerminate();
    }

}

In Activity I will get them like ,

BeemApplication.mEditor.putString(ctx.getString(R.string.pref_online_number), number).commit();

BeemApplication.mPref.getString(ctx.getString(R.string.pref_online_number), number).commit();

"All values are deleted from Shared preferences" -- what is your evidence of this? — CommonsWare, Nov 28 '14 at 13:42
Make sure that no one of your preferences items was getting saved with a **null key**, because after the crash when your app try to load the preferences.xml file, it can cause a preferences crash and preferences will be reseted. — Rami, Nov 28 '14 at 13:51
@CommonsWare, When ever i am trying to get stored values, it is giving default values — Gangadhar Nimballi, Nov 29 '14 at 06:48
@Rami, How will be the null key, All keys are stored in string.xml file — Gangadhar Nimballi, Nov 29 '14 at 06:50
@maveňツ, For every crash it is not resetting the values. It is some times like while receiving messages. If I crash it by myself with null value , Preferences are not being reset. — Gangadhar Nimballi, Nov 29 '14 at 06:54
@GangadharNimbally in string.xml, something like that: produce a null value. — Rami, Nov 29 '14 at 07:42

score 1 · Answer 1 · edited May 23 '17 at 12:08

1

This is common issue that many have faced including myself. Have a look at this post Android - Shared Preferences are lost sometimes which shares your findings.

I would recommend not storing persistent data across shared preferences and rather use something like a database table to store settings.

edited May 23 '17 at 12:08

Community

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answered Nov 28 '14 at 13:54

Byron

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Why shared preferences has been reset up on app crash or force close Android

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