How to Store Hashmap to android so that it will be reuse when application restart using shared preferences?

Question

I want to store hashmap to my android application that when restart ,it shows last saved values of hashmap.

HashMap HtKpi=new HashMap&l         


        

Answer 1

Serialize it and save it in shared preferences or in a file. Whether you can do this, of course, depends on the data types being mapped from and to. (This won't work, for instance, if you try to serialize a View.)

Example:

//persist
HashMap counters; //the hashmap you want to save
SharedPreferences pref = getContext().getSharedPreferences("Your_Shared_Prefs", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();    
for (String s : counters.keySet()) {
    editor.putInteger(s, counters.get(s));
}
editor.commit();


//load
SharedPreferences pref = getContext().getSharedPreferences("Your_Shared_Prefs", Context.MODE_PRIVATE);
HashMap map= (HashMap) pref.getAll();
for (String s : map.keySet()) {
        Integer value=map.get(s);
        //Use Value
}