Shared Preferences initial declaration

Question

I'm new to android. i wanted to initialize a shared preference. i just need an auto increment id. i search many shared preferences and i cant understand their explanation.

i just wanted a simple initialization of a number.

for example,

key = RemID and initial value of that key is 0.

i want to initialize that at the first time only, not at every launch of my app

and i will be using that value and increment and store it back.

please share some thoughts.

Answer 1

I'd suggest using the default value parameter of SharedPreferences's get* methods.

For example:

SharedPreferences prefs = context.getSharedPreferences("counters",
                                                       Context.MODE_PRIVATE);

// increment a counter
int counter = prefs.getInt("counter", 0); // Using '0' for the default value
prefs.edit().putInt("counter", counter+1).apply();

Answer 2

Try this out

int sharedPrefValue;

then in the onCreate method,

sharedPrefValue=PreferenceManager.getDefaultSharedPreferences(this).getInt("sharedPrefValue", 0);

and then,

sharedPrefValue++;

PreferenceManager.getDefaultSharedPreferences(this).edit().putInt("sharedPrefValue", sharedPrefValue).commit();

Answer 3

Hi below is may be help for you

private void setShared() {
        SharedPreferences records = getSharedPreferences(
                LoginActivity.USER_RECORD, 0);
        SharedPreferences.Editor prefEditor = records.edit();

        int count = nImageUrl.size();

        for (int i = 0; i < count; i++) {

            prefEditor.putInt(ID + savedPhotosCount, Singleton.instanse.getCustomerID(mCustomerIndex));
            prefEditor.putString(FILE_PATH + savedPhotosCount, nImageUrl.get(i));
            prefEditor.putString(DESCRIPTION + savedPhotosCount, captionText.get(i));
            savedPhotosCount++;
            prefEditor.putInt(SAVED_PHOTOS_COUNT, savedPhotosCount);
        }
        prefEditor.commit();
    }

First declare the variable

  int savedPhotosCount = 0;

Every time the id was incremented.