how to store and retrieve (key,value) kind of data using saved preferences android

Question

I have a hash map table as below,

HashMap backUpCurency_values = new HashMap();

and i want to

Answer 1

You can use SharedPreferences.

settings = getSharedPreferences(PREFS_NAME, 0);
SharedPreferences.Editor editor = settings.edit();

//The below step you can repeat to put all the key value pair from the hashmap to the shared preference

editor.putString("Key", Value);

// Commit the edits!
editor.commit();

And to retrieve later use

SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
boolean silent = settings.getString(, );