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 should just use a for-each loop and iterate through the map like this:

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

for( Entry entry : backUpCurency_values.entrySet() ) 
  editor.putString( entry.getKey(), entry.getValue() );

editor.commit();

Then when you need to get your values back for later use you do the following (provided that this SharedPreference-object is reserved for currency):

SharedPreferences prefs = getSharedPreferences(PREFS_NAME, 0);

for( Entry entry : prefs.getAll().entrySet() ) 
  backUpCurency_values.put( entry.getKey(), entry.getValue().toString() );