How to retrieve a list of data from SharedPreferences

Question

I am trying to retrieve data from sharedPreferences:

    public static void loadArray(Context mContext) {
    SharedPreferences mSharedPreference1 = PreferenceManager.getDefaultSharedPreferences(mContext);
    WorkList.clear();
    int size = mSharedPreference1.getInt("Status_size", 0);
    for (int i = 0; i < size; i++) {
        WorkList.add(mSharedPreference1.getString("Status_" + i, null));
    }
}

i got this code but don't know how to call this method. I try to call this method in the same non-activity class.

I tried and it said: " Non-static method 'loadArray(android.content.Context) cannot be referenced from a static context " the code i tried: public void main(String[] args) { MainActivity.loadArray(getApplicationContext()); } — Trần Hoàng Long, Jul 13 '17 at 06:48

score 1 · Accepted Answer · edited Jul 13 '17 at 06:58

1

Create an app Singleton Class by following this link

Then you can call the method by loadArray(AppSingleton.getInstance().getContext())

Once you are a bit comfortable and have understood the concept switch to using Dagger2 to handle singletons

edited Jul 13 '17 at 06:58

sharp

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answered Jul 13 '17 at 06:48

Joey Pinto

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your link is dead – Trần Hoàng Long Jul 13 '17 at 06:50
I changed it. This may seem intimidating for a new developer, but its a really safe option. A bad way of just getting it done may be using a public static context from an activity,but seriously DONT! – Joey Pinto Jul 13 '17 at 06:54

How to retrieve a list of data from SharedPreferences

1 Answers1