Android - SharedPreferences with serializable object

Question

I know that SharedPreferences has putString(), putFloat(), putLong(), putInt() and putBoolean(). But I need

Answer 1

It is possible to do it without a file.

I'm serializing the information to base64 and like this I'm able to save it as a string in the preferences.

The following code is Serializing a serializable objec to base64 string and vice versa: import android.util.Base64;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;


public class ObjectSerializerHelper {
    static public String objectToString(Serializable object) {
        String encoded = null;
        try {
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
            objectOutputStream.writeObject(object);
            objectOutputStream.close();
            encoded = new String(Base64.encodeToString(byteArrayOutputStream.toByteArray(),0));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return encoded;
    }

    @SuppressWarnings("unchecked")
    static public Serializable stringToObject(String string){
        byte[] bytes = Base64.decode(string,0);
        Serializable object = null;
        try {
            ObjectInputStream objectInputStream = new ObjectInputStream( new ByteArrayInputStream(bytes) );
            object = (Serializable)objectInputStream.readObject();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (ClassCastException e) {
            e.printStackTrace();
        }
        return object;
    }

}