android - How to store hashmap so that it can be retained it value after a device reboot?

Question

I want to store the hashmap object in global class so that it will store value even after the mobile restart. Any idea how to go about this concept.

Answer 1

serialize your hashmap object before restarting and deserialize it after restart...

here is sample code for serialization..

public void serializeMap(HashMap<String,String> hm) {
    try {
        FileOutputStream fStream = openFileOutput(namefile.bin, Context.MODE_PRIVATE) ;
        ObjectOutputStream oStream = new ObjectOutputStream(fStream);

        oStream.writeObject(hm);        
        oStream.flush();
        oStream.close();

        Log.v("Serialization success", "Success");
    } catch (Exception e) {
        Log.v("IO Exception", e.getMessage());
    }
}   

you can similarly read it by deserializing it....
Thanks....